Initial commit

env/lib/python3.10/site-packages/django/core/asgi.py

@@ -0,0 +1,13 @@
+import django
+from django.core.handlers.asgi import ASGIHandler
+
+
+def get_asgi_application():
+    """
+    The public interface to Django's ASGI support. Return an ASGI 3 callable.
+
+    Avoids making django.core.handlers.ASGIHandler a public API, in case the
+    internal implementation changes or moves in the future.
+    """
+    django.setup(set_prefix=False)
+    return ASGIHandler()

env/lib/python3.10/site-packages/django/core/cache/__init__.py

@@ -0,0 +1,67 @@
+"""
+Caching framework.
+
+This package defines set of cache backends that all conform to a simple API.
+In a nutshell, a cache is a set of values -- which can be any object that
+may be pickled -- identified by string keys.  For the complete API, see
+the abstract BaseCache class in django.core.cache.backends.base.
+
+Client code should use the `cache` variable defined here to access the default
+cache backend and look up non-default cache backends in the `caches` dict-like
+object.
+
+See docs/topics/cache.txt for information on the public API.
+"""
+
+from django.core import signals
+from django.core.cache.backends.base import (
+    BaseCache,
+    CacheKeyWarning,
+    InvalidCacheBackendError,
+    InvalidCacheKey,
+)
+from django.utils.connection import BaseConnectionHandler, ConnectionProxy
+from django.utils.module_loading import import_string
+
+__all__ = [
+    "cache",
+    "caches",
+    "DEFAULT_CACHE_ALIAS",
+    "InvalidCacheBackendError",
+    "CacheKeyWarning",
+    "BaseCache",
+    "InvalidCacheKey",
+]
+
+DEFAULT_CACHE_ALIAS = "default"
+
+
+class CacheHandler(BaseConnectionHandler):
+    settings_name = "CACHES"
+    exception_class = InvalidCacheBackendError
+
+    def create_connection(self, alias):
+        params = self.settings[alias].copy()
+        backend = params.pop("BACKEND")
+        location = params.pop("LOCATION", "")
+        try:
+            backend_cls = import_string(backend)
+        except ImportError as e:
+            raise InvalidCacheBackendError(
+                "Could not find backend '%s': %s" % (backend, e)
+            ) from e
+        return backend_cls(location, params)
+
+
+caches = CacheHandler()
+
+cache = ConnectionProxy(caches, DEFAULT_CACHE_ALIAS)
+
+
+def close_caches(**kwargs):
+    # Some caches need to do a cleanup at the end of a request cycle. If not
+    # implemented in a particular backend cache.close() is a no-op.
+    caches.close_all()
+
+
+signals.request_finished.connect(close_caches)

env/lib/python3.10/site-packages/django/core/cache/backends/base.py

@@ -0,0 +1,405 @@
+"Base Cache class."
+import time
+import warnings
+
+from asgiref.sync import sync_to_async
+
+from django.core.exceptions import ImproperlyConfigured
+from django.utils.module_loading import import_string
+from django.utils.regex_helper import _lazy_re_compile
+
+
+class InvalidCacheBackendError(ImproperlyConfigured):
+    pass
+
+
+class CacheKeyWarning(RuntimeWarning):
+    pass
+
+
+class InvalidCacheKey(ValueError):
+    pass
+
+
+# Stub class to ensure not passing in a `timeout` argument results in
+# the default timeout
+DEFAULT_TIMEOUT = object()
+
+# Memcached does not accept keys longer than this.
+MEMCACHE_MAX_KEY_LENGTH = 250
+
+
+def default_key_func(key, key_prefix, version):
+    """
+    Default function to generate keys.
+
+    Construct the key used by all other methods. By default, prepend
+    the `key_prefix`. KEY_FUNCTION can be used to specify an alternate
+    function with custom key making behavior.
+    """
+    return "%s:%s:%s" % (key_prefix, version, key)
+
+
+def get_key_func(key_func):
+    """
+    Function to decide which key function to use.
+
+    Default to ``default_key_func``.
+    """
+    if key_func is not None:
+        if callable(key_func):
+            return key_func
+        else:
+            return import_string(key_func)
+    return default_key_func
+
+
+class BaseCache:
+    _missing_key = object()
+
+    def __init__(self, params):
+        timeout = params.get("timeout", params.get("TIMEOUT", 300))
+        if timeout is not None:
+            try:
+                timeout = int(timeout)
+            except (ValueError, TypeError):
+                timeout = 300
+        self.default_timeout = timeout
+
+        options = params.get("OPTIONS", {})
+        max_entries = params.get("max_entries", options.get("MAX_ENTRIES", 300))
+        try:
+            self._max_entries = int(max_entries)
+        except (ValueError, TypeError):
+            self._max_entries = 300
+
+        cull_frequency = params.get("cull_frequency", options.get("CULL_FREQUENCY", 3))
+        try:
+            self._cull_frequency = int(cull_frequency)
+        except (ValueError, TypeError):
+            self._cull_frequency = 3
+
+        self.key_prefix = params.get("KEY_PREFIX", "")
+        self.version = params.get("VERSION", 1)
+        self.key_func = get_key_func(params.get("KEY_FUNCTION"))
+
+    def get_backend_timeout(self, timeout=DEFAULT_TIMEOUT):
+        """
+        Return the timeout value usable by this backend based upon the provided
+        timeout.
+        """
+        if timeout == DEFAULT_TIMEOUT:
+            timeout = self.default_timeout
+        elif timeout == 0:
+            # ticket 21147 - avoid time.time() related precision issues
+            timeout = -1
+        return None if timeout is None else time.time() + timeout
+
+    def make_key(self, key, version=None):
+        """
+        Construct the key used by all other methods. By default, use the
+        key_func to generate a key (which, by default, prepends the
+        `key_prefix' and 'version'). A different key function can be provided
+        at the time of cache construction; alternatively, you can subclass the
+        cache backend to provide custom key making behavior.
+        """
+        if version is None:
+            version = self.version
+
+        return self.key_func(key, self.key_prefix, version)
+
+    def validate_key(self, key):
+        """
+        Warn about keys that would not be portable to the memcached
+        backend. This encourages (but does not force) writing backend-portable
+        cache code.
+        """
+        for warning in memcache_key_warnings(key):
+            warnings.warn(warning, CacheKeyWarning)
+
+    def make_and_validate_key(self, key, version=None):
+        """Helper to make and validate keys."""
+        key = self.make_key(key, version=version)
+        self.validate_key(key)
+        return key
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        """
+        Set a value in the cache if the key does not already exist. If
+        timeout is given, use that timeout for the key; otherwise use the
+        default cache timeout.
+
+        Return True if the value was stored, False otherwise.
+        """
+        raise NotImplementedError(
+            "subclasses of BaseCache must provide an add() method"
+        )
+
+    async def aadd(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        return await sync_to_async(self.add, thread_sensitive=True)(
+            key, value, timeout, version
+        )
+
+    def get(self, key, default=None, version=None):
+        """
+        Fetch a given key from the cache. If the key does not exist, return
+        default, which itself defaults to None.
+        """
+        raise NotImplementedError("subclasses of BaseCache must provide a get() method")
+
+    async def aget(self, key, default=None, version=None):
+        return await sync_to_async(self.get, thread_sensitive=True)(
+            key, default, version
+        )
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        """
+        Set a value in the cache. If timeout is given, use that timeout for the
+        key; otherwise use the default cache timeout.
+        """
+        raise NotImplementedError("subclasses of BaseCache must provide a set() method")
+
+    async def aset(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        return await sync_to_async(self.set, thread_sensitive=True)(
+            key, value, timeout, version
+        )
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        """
+        Update the key's expiry time using timeout. Return True if successful
+        or False if the key does not exist.
+        """
+        raise NotImplementedError(
+            "subclasses of BaseCache must provide a touch() method"
+        )
+
+    async def atouch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        return await sync_to_async(self.touch, thread_sensitive=True)(
+            key, timeout, version
+        )
+
+    def delete(self, key, version=None):
+        """
+        Delete a key from the cache and return whether it succeeded, failing
+        silently.
+        """
+        raise NotImplementedError(
+            "subclasses of BaseCache must provide a delete() method"
+        )
+
+    async def adelete(self, key, version=None):
+        return await sync_to_async(self.delete, thread_sensitive=True)(key, version)
+
+    def get_many(self, keys, version=None):
+        """
+        Fetch a bunch of keys from the cache. For certain backends (memcached,
+        pgsql) this can be *much* faster when fetching multiple values.
+
+        Return a dict mapping each key in keys to its value. If the given
+        key is missing, it will be missing from the response dict.
+        """
+        d = {}
+        for k in keys:
+            val = self.get(k, self._missing_key, version=version)
+            if val is not self._missing_key:
+                d[k] = val
+        return d
+
+    async def aget_many(self, keys, version=None):
+        """See get_many()."""
+        d = {}
+        for k in keys:
+            val = await self.aget(k, self._missing_key, version=version)
+            if val is not self._missing_key:
+                d[k] = val
+        return d
+
+    def get_or_set(self, key, default, timeout=DEFAULT_TIMEOUT, version=None):
+        """
+        Fetch a given key from the cache. If the key does not exist,
+        add the key and set it to the default value. The default value can
+        also be any callable. If timeout is given, use that timeout for the
+        key; otherwise use the default cache timeout.
+
+        Return the value of the key stored or retrieved.
+        """
+        val = self.get(key, self._missing_key, version=version)
+        if val is self._missing_key:
+            if callable(default):
+                default = default()
+            self.add(key, default, timeout=timeout, version=version)
+            # Fetch the value again to avoid a race condition if another caller
+            # added a value between the first get() and the add() above.
+            return self.get(key, default, version=version)
+        return val
+
+    async def aget_or_set(self, key, default, timeout=DEFAULT_TIMEOUT, version=None):
+        """See get_or_set()."""
+        val = await self.aget(key, self._missing_key, version=version)
+        if val is self._missing_key:
+            if callable(default):
+                default = default()
+            await self.aadd(key, default, timeout=timeout, version=version)
+            # Fetch the value again to avoid a race condition if another caller
+            # added a value between the first aget() and the aadd() above.
+            return await self.aget(key, default, version=version)
+        return val
+
+    def has_key(self, key, version=None):
+        """
+        Return True if the key is in the cache and has not expired.
+        """
+        return (
+            self.get(key, self._missing_key, version=version) is not self._missing_key
+        )
+
+    async def ahas_key(self, key, version=None):
+        return (
+            await self.aget(key, self._missing_key, version=version)
+            is not self._missing_key
+        )
+
+    def incr(self, key, delta=1, version=None):
+        """
+        Add delta to value in the cache. If the key does not exist, raise a
+        ValueError exception.
+        """
+        value = self.get(key, self._missing_key, version=version)
+        if value is self._missing_key:
+            raise ValueError("Key '%s' not found" % key)
+        new_value = value + delta
+        self.set(key, new_value, version=version)
+        return new_value
+
+    async def aincr(self, key, delta=1, version=None):
+        """See incr()."""
+        value = await self.aget(key, self._missing_key, version=version)
+        if value is self._missing_key:
+            raise ValueError("Key '%s' not found" % key)
+        new_value = value + delta
+        await self.aset(key, new_value, version=version)
+        return new_value
+
+    def decr(self, key, delta=1, version=None):
+        """
+        Subtract delta from value in the cache. If the key does not exist, raise
+        a ValueError exception.
+        """
+        return self.incr(key, -delta, version=version)
+
+    async def adecr(self, key, delta=1, version=None):
+        return await self.aincr(key, -delta, version=version)
+
+    def __contains__(self, key):
+        """
+        Return True if the key is in the cache and has not expired.
+        """
+        # This is a separate method, rather than just a copy of has_key(),
+        # so that it always has the same functionality as has_key(), even
+        # if a subclass overrides it.
+        return self.has_key(key)
+
+    def set_many(self, data, timeout=DEFAULT_TIMEOUT, version=None):
+        """
+        Set a bunch of values in the cache at once from a dict of key/value
+        pairs.  For certain backends (memcached), this is much more efficient
+        than calling set() multiple times.
+
+        If timeout is given, use that timeout for the key; otherwise use the
+        default cache timeout.
+
+        On backends that support it, return a list of keys that failed
+        insertion, or an empty list if all keys were inserted successfully.
+        """
+        for key, value in data.items():
+            self.set(key, value, timeout=timeout, version=version)
+        return []
+
+    async def aset_many(self, data, timeout=DEFAULT_TIMEOUT, version=None):
+        for key, value in data.items():
+            await self.aset(key, value, timeout=timeout, version=version)
+        return []
+
+    def delete_many(self, keys, version=None):
+        """
+        Delete a bunch of values in the cache at once. For certain backends
+        (memcached), this is much more efficient than calling delete() multiple
+        times.
+        """
+        for key in keys:
+            self.delete(key, version=version)
+
+    async def adelete_many(self, keys, version=None):
+        for key in keys:
+            await self.adelete(key, version=version)
+
+    def clear(self):
+        """Remove *all* values from the cache at once."""
+        raise NotImplementedError(
+            "subclasses of BaseCache must provide a clear() method"
+        )
+
+    async def aclear(self):
+        return await sync_to_async(self.clear, thread_sensitive=True)()
+
+    def incr_version(self, key, delta=1, version=None):
+        """
+        Add delta to the cache version for the supplied key. Return the new
+        version.
+        """
+        if version is None:
+            version = self.version
+
+        value = self.get(key, self._missing_key, version=version)
+        if value is self._missing_key:
+            raise ValueError("Key '%s' not found" % key)
+
+        self.set(key, value, version=version + delta)
+        self.delete(key, version=version)
+        return version + delta
+
+    async def aincr_version(self, key, delta=1, version=None):
+        """See incr_version()."""
+        if version is None:
+            version = self.version
+
+        value = await self.aget(key, self._missing_key, version=version)
+        if value is self._missing_key:
+            raise ValueError("Key '%s' not found" % key)
+
+        await self.aset(key, value, version=version + delta)
+        await self.adelete(key, version=version)
+        return version + delta
+
+    def decr_version(self, key, delta=1, version=None):
+        """
+        Subtract delta from the cache version for the supplied key. Return the
+        new version.
+        """
+        return self.incr_version(key, -delta, version)
+
+    async def adecr_version(self, key, delta=1, version=None):
+        return await self.aincr_version(key, -delta, version)
+
+    def close(self, **kwargs):
+        """Close the cache connection"""
+        pass
+
+    async def aclose(self, **kwargs):
+        pass
+
+
+memcached_error_chars_re = _lazy_re_compile(r"[\x00-\x20\x7f]")
+
+
+def memcache_key_warnings(key):
+    if len(key) > MEMCACHE_MAX_KEY_LENGTH:
+        yield (
+            "Cache key will cause errors if used with memcached: %r "
+            "(longer than %s)" % (key, MEMCACHE_MAX_KEY_LENGTH)
+        )
+    if memcached_error_chars_re.search(key):
+        yield (
+            "Cache key contains characters that will cause errors if used with "
+            f"memcached: {key!r}"
+        )

env/lib/python3.10/site-packages/django/core/cache/backends/db.py

@@ -0,0 +1,293 @@
+"Database cache backend."
+import base64
+import pickle
+from datetime import datetime, timezone
+
+from django.conf import settings
+from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
+from django.db import DatabaseError, connections, models, router, transaction
+from django.utils.timezone import now as tz_now
+
+
+class Options:
+    """A class that will quack like a Django model _meta class.
+
+    This allows cache operations to be controlled by the router
+    """
+
+    def __init__(self, table):
+        self.db_table = table
+        self.app_label = "django_cache"
+        self.model_name = "cacheentry"
+        self.verbose_name = "cache entry"
+        self.verbose_name_plural = "cache entries"
+        self.object_name = "CacheEntry"
+        self.abstract = False
+        self.managed = True
+        self.proxy = False
+        self.swapped = False
+
+
+class BaseDatabaseCache(BaseCache):
+    def __init__(self, table, params):
+        super().__init__(params)
+        self._table = table
+
+        class CacheEntry:
+            _meta = Options(table)
+
+        self.cache_model_class = CacheEntry
+
+
+class DatabaseCache(BaseDatabaseCache):
+    # This class uses cursors provided by the database connection. This means
+    # it reads expiration values as aware or naive datetimes, depending on the
+    # value of USE_TZ and whether the database supports time zones. The ORM's
+    # conversion and adaptation infrastructure is then used to avoid comparing
+    # aware and naive datetimes accidentally.
+
+    pickle_protocol = pickle.HIGHEST_PROTOCOL
+
+    def get(self, key, default=None, version=None):
+        return self.get_many([key], version).get(key, default)
+
+    def get_many(self, keys, version=None):
+        if not keys:
+            return {}
+
+        key_map = {
+            self.make_and_validate_key(key, version=version): key for key in keys
+        }
+
+        db = router.db_for_read(self.cache_model_class)
+        connection = connections[db]
+        quote_name = connection.ops.quote_name
+        table = quote_name(self._table)
+
+        with connection.cursor() as cursor:
+            cursor.execute(
+                "SELECT %s, %s, %s FROM %s WHERE %s IN (%s)"
+                % (
+                    quote_name("cache_key"),
+                    quote_name("value"),
+                    quote_name("expires"),
+                    table,
+                    quote_name("cache_key"),
+                    ", ".join(["%s"] * len(key_map)),
+                ),
+                list(key_map),
+            )
+            rows = cursor.fetchall()
+
+        result = {}
+        expired_keys = []
+        expression = models.Expression(output_field=models.DateTimeField())
+        converters = connection.ops.get_db_converters(
+            expression
+        ) + expression.get_db_converters(connection)
+        for key, value, expires in rows:
+            for converter in converters:
+                expires = converter(expires, expression, connection)
+            if expires < tz_now():
+                expired_keys.append(key)
+            else:
+                value = connection.ops.process_clob(value)
+                value = pickle.loads(base64.b64decode(value.encode()))
+                result[key_map.get(key)] = value
+        self._base_delete_many(expired_keys)
+        return result
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        self._base_set("set", key, value, timeout)
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._base_set("add", key, value, timeout)
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._base_set("touch", key, None, timeout)
+
+    def _base_set(self, mode, key, value, timeout=DEFAULT_TIMEOUT):
+        timeout = self.get_backend_timeout(timeout)
+        db = router.db_for_write(self.cache_model_class)
+        connection = connections[db]
+        quote_name = connection.ops.quote_name
+        table = quote_name(self._table)
+
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT COUNT(*) FROM %s" % table)
+            num = cursor.fetchone()[0]
+            now = tz_now()
+            now = now.replace(microsecond=0)
+            if timeout is None:
+                exp = datetime.max
+            else:
+                tz = timezone.utc if settings.USE_TZ else None
+                exp = datetime.fromtimestamp(timeout, tz=tz)
+            exp = exp.replace(microsecond=0)
+            if num > self._max_entries:
+                self._cull(db, cursor, now, num)
+            pickled = pickle.dumps(value, self.pickle_protocol)
+            # The DB column is expecting a string, so make sure the value is a
+            # string, not bytes. Refs #19274.
+            b64encoded = base64.b64encode(pickled).decode("latin1")
+            try:
+                # Note: typecasting for datetimes is needed by some 3rd party
+                # database backends. All core backends work without typecasting,
+                # so be careful about changes here - test suite will NOT pick
+                # regressions.
+                with transaction.atomic(using=db):
+                    cursor.execute(
+                        "SELECT %s, %s FROM %s WHERE %s = %%s"
+                        % (
+                            quote_name("cache_key"),
+                            quote_name("expires"),
+                            table,
+                            quote_name("cache_key"),
+                        ),
+                        [key],
+                    )
+                    result = cursor.fetchone()
+
+                    if result:
+                        current_expires = result[1]
+                        expression = models.Expression(
+                            output_field=models.DateTimeField()
+                        )
+                        for converter in connection.ops.get_db_converters(
+                            expression
+                        ) + expression.get_db_converters(connection):
+                            current_expires = converter(
+                                current_expires, expression, connection
+                            )
+
+                    exp = connection.ops.adapt_datetimefield_value(exp)
+                    if result and mode == "touch":
+                        cursor.execute(
+                            "UPDATE %s SET %s = %%s WHERE %s = %%s"
+                            % (table, quote_name("expires"), quote_name("cache_key")),
+                            [exp, key],
+                        )
+                    elif result and (
+                        mode == "set" or (mode == "add" and current_expires < now)
+                    ):
+                        cursor.execute(
+                            "UPDATE %s SET %s = %%s, %s = %%s WHERE %s = %%s"
+                            % (
+                                table,
+                                quote_name("value"),
+                                quote_name("expires"),
+                                quote_name("cache_key"),
+                            ),
+                            [b64encoded, exp, key],
+                        )
+                    elif mode != "touch":
+                        cursor.execute(
+                            "INSERT INTO %s (%s, %s, %s) VALUES (%%s, %%s, %%s)"
+                            % (
+                                table,
+                                quote_name("cache_key"),
+                                quote_name("value"),
+                                quote_name("expires"),
+                            ),
+                            [key, b64encoded, exp],
+                        )
+                    else:
+                        return False  # touch failed.
+            except DatabaseError:
+                # To be threadsafe, updates/inserts are allowed to fail silently
+                return False
+            else:
+                return True
+
+    def delete(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._base_delete_many([key])
+
+    def delete_many(self, keys, version=None):
+        keys = [self.make_and_validate_key(key, version=version) for key in keys]
+        self._base_delete_many(keys)
+
+    def _base_delete_many(self, keys):
+        if not keys:
+            return False
+
+        db = router.db_for_write(self.cache_model_class)
+        connection = connections[db]
+        quote_name = connection.ops.quote_name
+        table = quote_name(self._table)
+
+        with connection.cursor() as cursor:
+            cursor.execute(
+                "DELETE FROM %s WHERE %s IN (%s)"
+                % (
+                    table,
+                    quote_name("cache_key"),
+                    ", ".join(["%s"] * len(keys)),
+                ),
+                keys,
+            )
+            return bool(cursor.rowcount)
+
+    def has_key(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+
+        db = router.db_for_read(self.cache_model_class)
+        connection = connections[db]
+        quote_name = connection.ops.quote_name
+
+        now = tz_now().replace(microsecond=0, tzinfo=None)
+
+        with connection.cursor() as cursor:
+            cursor.execute(
+                "SELECT %s FROM %s WHERE %s = %%s and %s > %%s"
+                % (
+                    quote_name("cache_key"),
+                    quote_name(self._table),
+                    quote_name("cache_key"),
+                    quote_name("expires"),
+                ),
+                [key, connection.ops.adapt_datetimefield_value(now)],
+            )
+            return cursor.fetchone() is not None
+
+    def _cull(self, db, cursor, now, num):
+        if self._cull_frequency == 0:
+            self.clear()
+        else:
+            connection = connections[db]
+            table = connection.ops.quote_name(self._table)
+            cursor.execute(
+                "DELETE FROM %s WHERE %s < %%s"
+                % (
+                    table,
+                    connection.ops.quote_name("expires"),
+                ),
+                [connection.ops.adapt_datetimefield_value(now)],
+            )
+            deleted_count = cursor.rowcount
+            remaining_num = num - deleted_count
+            if remaining_num > self._max_entries:
+                cull_num = remaining_num // self._cull_frequency
+                cursor.execute(
+                    connection.ops.cache_key_culling_sql() % table, [cull_num]
+                )
+                last_cache_key = cursor.fetchone()
+                if last_cache_key:
+                    cursor.execute(
+                        "DELETE FROM %s WHERE %s < %%s"
+                        % (
+                            table,
+                            connection.ops.quote_name("cache_key"),
+                        ),
+                        [last_cache_key[0]],
+                    )
+
+    def clear(self):
+        db = router.db_for_write(self.cache_model_class)
+        connection = connections[db]
+        table = connection.ops.quote_name(self._table)
+        with connection.cursor() as cursor:
+            cursor.execute("DELETE FROM %s" % table)

env/lib/python3.10/site-packages/django/core/cache/backends/dummy.py

@@ -0,0 +1,34 @@
+"Dummy cache backend"
+
+from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
+
+
+class DummyCache(BaseCache):
+    def __init__(self, host, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        self.make_and_validate_key(key, version=version)
+        return True
+
+    def get(self, key, default=None, version=None):
+        self.make_and_validate_key(key, version=version)
+        return default
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        self.make_and_validate_key(key, version=version)
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        self.make_and_validate_key(key, version=version)
+        return False
+
+    def delete(self, key, version=None):
+        self.make_and_validate_key(key, version=version)
+        return False
+
+    def has_key(self, key, version=None):
+        self.make_and_validate_key(key, version=version)
+        return False
+
+    def clear(self):
+        pass

env/lib/python3.10/site-packages/django/core/cache/backends/filebased.py

@@ -0,0 +1,170 @@
+"File-based cache backend"
+import glob
+import os
+import pickle
+import random
+import tempfile
+import time
+import zlib
+from hashlib import md5
+
+from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
+from django.core.files import locks
+from django.core.files.move import file_move_safe
+
+
+class FileBasedCache(BaseCache):
+    cache_suffix = ".djcache"
+    pickle_protocol = pickle.HIGHEST_PROTOCOL
+
+    def __init__(self, dir, params):
+        super().__init__(params)
+        self._dir = os.path.abspath(dir)
+        self._createdir()
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        if self.has_key(key, version):
+            return False
+        self.set(key, value, timeout, version)
+        return True
+
+    def get(self, key, default=None, version=None):
+        fname = self._key_to_file(key, version)
+        try:
+            with open(fname, "rb") as f:
+                if not self._is_expired(f):
+                    return pickle.loads(zlib.decompress(f.read()))
+        except FileNotFoundError:
+            pass
+        return default
+
+    def _write_content(self, file, timeout, value):
+        expiry = self.get_backend_timeout(timeout)
+        file.write(pickle.dumps(expiry, self.pickle_protocol))
+        file.write(zlib.compress(pickle.dumps(value, self.pickle_protocol)))
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        self._createdir()  # Cache dir can be deleted at any time.
+        fname = self._key_to_file(key, version)
+        self._cull()  # make some room if necessary
+        fd, tmp_path = tempfile.mkstemp(dir=self._dir)
+        renamed = False
+        try:
+            with open(fd, "wb") as f:
+                self._write_content(f, timeout, value)
+            file_move_safe(tmp_path, fname, allow_overwrite=True)
+            renamed = True
+        finally:
+            if not renamed:
+                os.remove(tmp_path)
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        try:
+            with open(self._key_to_file(key, version), "r+b") as f:
+                try:
+                    locks.lock(f, locks.LOCK_EX)
+                    if self._is_expired(f):
+                        return False
+                    else:
+                        previous_value = pickle.loads(zlib.decompress(f.read()))
+                        f.seek(0)
+                        self._write_content(f, timeout, previous_value)
+                        return True
+                finally:
+                    locks.unlock(f)
+        except FileNotFoundError:
+            return False
+
+    def delete(self, key, version=None):
+        return self._delete(self._key_to_file(key, version))
+
+    def _delete(self, fname):
+        if not fname.startswith(self._dir) or not os.path.exists(fname):
+            return False
+        try:
+            os.remove(fname)
+        except FileNotFoundError:
+            # The file may have been removed by another process.
+            return False
+        return True
+
+    def has_key(self, key, version=None):
+        fname = self._key_to_file(key, version)
+        try:
+            with open(fname, "rb") as f:
+                return not self._is_expired(f)
+        except FileNotFoundError:
+            return False
+
+    def _cull(self):
+        """
+        Remove random cache entries if max_entries is reached at a ratio
+        of num_entries / cull_frequency. A value of 0 for CULL_FREQUENCY means
+        that the entire cache will be purged.
+        """
+        filelist = self._list_cache_files()
+        num_entries = len(filelist)
+        if num_entries < self._max_entries:
+            return  # return early if no culling is required
+        if self._cull_frequency == 0:
+            return self.clear()  # Clear the cache when CULL_FREQUENCY = 0
+        # Delete a random selection of entries
+        filelist = random.sample(filelist, int(num_entries / self._cull_frequency))
+        for fname in filelist:
+            self._delete(fname)
+
+    def _createdir(self):
+        # Set the umask because os.makedirs() doesn't apply the "mode" argument
+        # to intermediate-level directories.
+        old_umask = os.umask(0o077)
+        try:
+            os.makedirs(self._dir, 0o700, exist_ok=True)
+        finally:
+            os.umask(old_umask)
+
+    def _key_to_file(self, key, version=None):
+        """
+        Convert a key into a cache file path. Basically this is the
+        root cache path joined with the md5sum of the key and a suffix.
+        """
+        key = self.make_and_validate_key(key, version=version)
+        return os.path.join(
+            self._dir,
+            "".join(
+                [
+                    md5(key.encode(), usedforsecurity=False).hexdigest(),
+                    self.cache_suffix,
+                ]
+            ),
+        )
+
+    def clear(self):
+        """
+        Remove all the cache files.
+        """
+        for fname in self._list_cache_files():
+            self._delete(fname)
+
+    def _is_expired(self, f):
+        """
+        Take an open cache file `f` and delete it if it's expired.
+        """
+        try:
+            exp = pickle.load(f)
+        except EOFError:
+            exp = 0  # An empty file is considered expired.
+        if exp is not None and exp < time.time():
+            f.close()  # On Windows a file has to be closed before deleting
+            self._delete(f.name)
+            return True
+        return False
+
+    def _list_cache_files(self):
+        """
+        Get a list of paths to all the cache files. These are all the files
+        in the root cache dir that end on the cache_suffix.
+        """
+        return [
+            os.path.join(self._dir, fname)
+            for fname in glob.glob1(self._dir, "*%s" % self.cache_suffix)
+        ]

env/lib/python3.10/site-packages/django/core/cache/backends/locmem.py

@@ -0,0 +1,117 @@
+"Thread-safe in-memory cache backend."
+import pickle
+import time
+from collections import OrderedDict
+from threading import Lock
+
+from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
+
+# Global in-memory store of cache data. Keyed by name, to provide
+# multiple named local memory caches.
+_caches = {}
+_expire_info = {}
+_locks = {}
+
+
+class LocMemCache(BaseCache):
+    pickle_protocol = pickle.HIGHEST_PROTOCOL
+
+    def __init__(self, name, params):
+        super().__init__(params)
+        self._cache = _caches.setdefault(name, OrderedDict())
+        self._expire_info = _expire_info.setdefault(name, {})
+        self._lock = _locks.setdefault(name, Lock())
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        pickled = pickle.dumps(value, self.pickle_protocol)
+        with self._lock:
+            if self._has_expired(key):
+                self._set(key, pickled, timeout)
+                return True
+            return False
+
+    def get(self, key, default=None, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        with self._lock:
+            if self._has_expired(key):
+                self._delete(key)
+                return default
+            pickled = self._cache[key]
+            self._cache.move_to_end(key, last=False)
+        return pickle.loads(pickled)
+
+    def _set(self, key, value, timeout=DEFAULT_TIMEOUT):
+        if len(self._cache) >= self._max_entries:
+            self._cull()
+        self._cache[key] = value
+        self._cache.move_to_end(key, last=False)
+        self._expire_info[key] = self.get_backend_timeout(timeout)
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        pickled = pickle.dumps(value, self.pickle_protocol)
+        with self._lock:
+            self._set(key, pickled, timeout)
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        with self._lock:
+            if self._has_expired(key):
+                return False
+            self._expire_info[key] = self.get_backend_timeout(timeout)
+            return True
+
+    def incr(self, key, delta=1, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        with self._lock:
+            if self._has_expired(key):
+                self._delete(key)
+                raise ValueError("Key '%s' not found" % key)
+            pickled = self._cache[key]
+            value = pickle.loads(pickled)
+            new_value = value + delta
+            pickled = pickle.dumps(new_value, self.pickle_protocol)
+            self._cache[key] = pickled
+            self._cache.move_to_end(key, last=False)
+        return new_value
+
+    def has_key(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        with self._lock:
+            if self._has_expired(key):
+                self._delete(key)
+                return False
+            return True
+
+    def _has_expired(self, key):
+        exp = self._expire_info.get(key, -1)
+        return exp is not None and exp <= time.time()
+
+    def _cull(self):
+        if self._cull_frequency == 0:
+            self._cache.clear()
+            self._expire_info.clear()
+        else:
+            count = len(self._cache) // self._cull_frequency
+            for i in range(count):
+                key, _ = self._cache.popitem()
+                del self._expire_info[key]
+
+    def _delete(self, key):
+        try:
+            del self._cache[key]
+            del self._expire_info[key]
+        except KeyError:
+            return False
+        return True
+
+    def delete(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        with self._lock:
+            return self._delete(key)
+
+    def clear(self):
+        with self._lock:
+            self._cache.clear()
+            self._expire_info.clear()

env/lib/python3.10/site-packages/django/core/cache/backends/memcached.py

@@ -0,0 +1,188 @@
+"Memcached cache backend"
+
+import re
+import time
+
+from django.core.cache.backends.base import (
+    DEFAULT_TIMEOUT,
+    BaseCache,
+    InvalidCacheKey,
+    memcache_key_warnings,
+)
+from django.utils.functional import cached_property
+
+
+class BaseMemcachedCache(BaseCache):
+    def __init__(self, server, params, library, value_not_found_exception):
+        super().__init__(params)
+        if isinstance(server, str):
+            self._servers = re.split("[;,]", server)
+        else:
+            self._servers = server
+
+        # Exception type raised by the underlying client library for a
+        # nonexistent key.
+        self.LibraryValueNotFoundException = value_not_found_exception
+
+        self._lib = library
+        self._class = library.Client
+        self._options = params.get("OPTIONS") or {}
+
+    @property
+    def client_servers(self):
+        return self._servers
+
+    @cached_property
+    def _cache(self):
+        """
+        Implement transparent thread-safe access to a memcached client.
+        """
+        return self._class(self.client_servers, **self._options)
+
+    def get_backend_timeout(self, timeout=DEFAULT_TIMEOUT):
+        """
+        Memcached deals with long (> 30 days) timeouts in a special
+        way. Call this function to obtain a safe value for your timeout.
+        """
+        if timeout == DEFAULT_TIMEOUT:
+            timeout = self.default_timeout
+
+        if timeout is None:
+            # Using 0 in memcache sets a non-expiring timeout.
+            return 0
+        elif int(timeout) == 0:
+            # Other cache backends treat 0 as set-and-expire. To achieve this
+            # in memcache backends, a negative timeout must be passed.
+            timeout = -1
+
+        if timeout > 2592000:  # 60*60*24*30, 30 days
+            # See https://github.com/memcached/memcached/wiki/Programming#expiration
+            # "Expiration times can be set from 0, meaning "never expire", to
+            # 30 days. Any time higher than 30 days is interpreted as a Unix
+            # timestamp date. If you want to expire an object on January 1st of
+            # next year, this is how you do that."
+            #
+            # This means that we have to switch to absolute timestamps.
+            timeout += int(time.time())
+        return int(timeout)
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.add(key, value, self.get_backend_timeout(timeout))
+
+    def get(self, key, default=None, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.get(key, default)
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        if not self._cache.set(key, value, self.get_backend_timeout(timeout)):
+            # Make sure the key doesn't keep its old value in case of failure
+            # to set (memcached's 1MB limit).
+            self._cache.delete(key)
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return bool(self._cache.touch(key, self.get_backend_timeout(timeout)))
+
+    def delete(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return bool(self._cache.delete(key))
+
+    def get_many(self, keys, version=None):
+        key_map = {
+            self.make_and_validate_key(key, version=version): key for key in keys
+        }
+        ret = self._cache.get_multi(key_map.keys())
+        return {key_map[k]: v for k, v in ret.items()}
+
+    def close(self, **kwargs):
+        # Many clients don't clean up connections properly.
+        self._cache.disconnect_all()
+
+    def incr(self, key, delta=1, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        try:
+            # Memcached doesn't support negative delta.
+            if delta < 0:
+                val = self._cache.decr(key, -delta)
+            else:
+                val = self._cache.incr(key, delta)
+        # Normalize an exception raised by the underlying client library to
+        # ValueError in the event of a nonexistent key when calling
+        # incr()/decr().
+        except self.LibraryValueNotFoundException:
+            val = None
+        if val is None:
+            raise ValueError("Key '%s' not found" % key)
+        return val
+
+    def set_many(self, data, timeout=DEFAULT_TIMEOUT, version=None):
+        safe_data = {}
+        original_keys = {}
+        for key, value in data.items():
+            safe_key = self.make_and_validate_key(key, version=version)
+            safe_data[safe_key] = value
+            original_keys[safe_key] = key
+        failed_keys = self._cache.set_multi(
+            safe_data, self.get_backend_timeout(timeout)
+        )
+        return [original_keys[k] for k in failed_keys]
+
+    def delete_many(self, keys, version=None):
+        keys = [self.make_and_validate_key(key, version=version) for key in keys]
+        self._cache.delete_multi(keys)
+
+    def clear(self):
+        self._cache.flush_all()
+
+    def validate_key(self, key):
+        for warning in memcache_key_warnings(key):
+            raise InvalidCacheKey(warning)
+
+
+class PyLibMCCache(BaseMemcachedCache):
+    "An implementation of a cache binding using pylibmc"
+
+    def __init__(self, server, params):
+        import pylibmc
+
+        super().__init__(
+            server, params, library=pylibmc, value_not_found_exception=pylibmc.NotFound
+        )
+
+    @property
+    def client_servers(self):
+        output = []
+        for server in self._servers:
+            output.append(server.removeprefix("unix:"))
+        return output
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        if timeout == 0:
+            return self._cache.delete(key)
+        return self._cache.touch(key, self.get_backend_timeout(timeout))
+
+    def close(self, **kwargs):
+        # libmemcached manages its own connections. Don't call disconnect_all()
+        # as it resets the failover state and creates unnecessary reconnects.
+        pass
+
+
+class PyMemcacheCache(BaseMemcachedCache):
+    """An implementation of a cache binding using pymemcache."""
+
+    def __init__(self, server, params):
+        import pymemcache.serde
+
+        super().__init__(
+            server, params, library=pymemcache, value_not_found_exception=KeyError
+        )
+        self._class = self._lib.HashClient
+        self._options = {
+            "allow_unicode_keys": True,
+            "default_noreply": False,
+            "serde": pymemcache.serde.pickle_serde,
+            **self._options,
+        }

env/lib/python3.10/site-packages/django/core/cache/backends/redis.py

@@ -0,0 +1,233 @@
+"""Redis cache backend."""
+
+import pickle
+import random
+import re
+
+from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
+from django.utils.functional import cached_property
+from django.utils.module_loading import import_string
+
+
+class RedisSerializer:
+    def __init__(self, protocol=None):
+        self.protocol = pickle.HIGHEST_PROTOCOL if protocol is None else protocol
+
+    def dumps(self, obj):
+        # Only skip pickling for integers, a int subclasses as bool should be
+        # pickled.
+        if type(obj) is int:
+            return obj
+        return pickle.dumps(obj, self.protocol)
+
+    def loads(self, data):
+        try:
+            return int(data)
+        except ValueError:
+            return pickle.loads(data)
+
+
+class RedisCacheClient:
+    def __init__(
+        self,
+        servers,
+        serializer=None,
+        pool_class=None,
+        parser_class=None,
+        **options,
+    ):
+        import redis
+
+        self._lib = redis
+        self._servers = servers
+        self._pools = {}
+
+        self._client = self._lib.Redis
+
+        if isinstance(pool_class, str):
+            pool_class = import_string(pool_class)
+        self._pool_class = pool_class or self._lib.ConnectionPool
+
+        if isinstance(serializer, str):
+            serializer = import_string(serializer)
+        if callable(serializer):
+            serializer = serializer()
+        self._serializer = serializer or RedisSerializer()
+
+        if isinstance(parser_class, str):
+            parser_class = import_string(parser_class)
+        parser_class = parser_class or self._lib.connection.DefaultParser
+
+        self._pool_options = {"parser_class": parser_class, **options}
+
+    def _get_connection_pool_index(self, write):
+        # Write to the first server. Read from other servers if there are more,
+        # otherwise read from the first server.
+        if write or len(self._servers) == 1:
+            return 0
+        return random.randint(1, len(self._servers) - 1)
+
+    def _get_connection_pool(self, write):
+        index = self._get_connection_pool_index(write)
+        if index not in self._pools:
+            self._pools[index] = self._pool_class.from_url(
+                self._servers[index],
+                **self._pool_options,
+            )
+        return self._pools[index]
+
+    def get_client(self, key=None, *, write=False):
+        # key is used so that the method signature remains the same and custom
+        # cache client can be implemented which might require the key to select
+        # the server, e.g. sharding.
+        pool = self._get_connection_pool(write)
+        return self._client(connection_pool=pool)
+
+    def add(self, key, value, timeout):
+        client = self.get_client(key, write=True)
+        value = self._serializer.dumps(value)
+
+        if timeout == 0:
+            if ret := bool(client.set(key, value, nx=True)):
+                client.delete(key)
+            return ret
+        else:
+            return bool(client.set(key, value, ex=timeout, nx=True))
+
+    def get(self, key, default):
+        client = self.get_client(key)
+        value = client.get(key)
+        return default if value is None else self._serializer.loads(value)
+
+    def set(self, key, value, timeout):
+        client = self.get_client(key, write=True)
+        value = self._serializer.dumps(value)
+        if timeout == 0:
+            client.delete(key)
+        else:
+            client.set(key, value, ex=timeout)
+
+    def touch(self, key, timeout):
+        client = self.get_client(key, write=True)
+        if timeout is None:
+            return bool(client.persist(key))
+        else:
+            return bool(client.expire(key, timeout))
+
+    def delete(self, key):
+        client = self.get_client(key, write=True)
+        return bool(client.delete(key))
+
+    def get_many(self, keys):
+        client = self.get_client(None)
+        ret = client.mget(keys)
+        return {
+            k: self._serializer.loads(v) for k, v in zip(keys, ret) if v is not None
+        }
+
+    def has_key(self, key):
+        client = self.get_client(key)
+        return bool(client.exists(key))
+
+    def incr(self, key, delta):
+        client = self.get_client(key, write=True)
+        if not client.exists(key):
+            raise ValueError("Key '%s' not found." % key)
+        return client.incr(key, delta)
+
+    def set_many(self, data, timeout):
+        client = self.get_client(None, write=True)
+        pipeline = client.pipeline()
+        pipeline.mset({k: self._serializer.dumps(v) for k, v in data.items()})
+
+        if timeout is not None:
+            # Setting timeout for each key as redis does not support timeout
+            # with mset().
+            for key in data:
+                pipeline.expire(key, timeout)
+        pipeline.execute()
+
+    def delete_many(self, keys):
+        client = self.get_client(None, write=True)
+        client.delete(*keys)
+
+    def clear(self):
+        client = self.get_client(None, write=True)
+        return bool(client.flushdb())
+
+
+class RedisCache(BaseCache):
+    def __init__(self, server, params):
+        super().__init__(params)
+        if isinstance(server, str):
+            self._servers = re.split("[;,]", server)
+        else:
+            self._servers = server
+
+        self._class = RedisCacheClient
+        self._options = params.get("OPTIONS", {})
+
+    @cached_property
+    def _cache(self):
+        return self._class(self._servers, **self._options)
+
+    def get_backend_timeout(self, timeout=DEFAULT_TIMEOUT):
+        if timeout == DEFAULT_TIMEOUT:
+            timeout = self.default_timeout
+        # The key will be made persistent if None used as a timeout.
+        # Non-positive values will cause the key to be deleted.
+        return None if timeout is None else max(0, int(timeout))
+
+    def add(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.add(key, value, self.get_backend_timeout(timeout))
+
+    def get(self, key, default=None, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.get(key, default)
+
+    def set(self, key, value, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        self._cache.set(key, value, self.get_backend_timeout(timeout))
+
+    def touch(self, key, timeout=DEFAULT_TIMEOUT, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.touch(key, self.get_backend_timeout(timeout))
+
+    def delete(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.delete(key)
+
+    def get_many(self, keys, version=None):
+        key_map = {
+            self.make_and_validate_key(key, version=version): key for key in keys
+        }
+        ret = self._cache.get_many(key_map.keys())
+        return {key_map[k]: v for k, v in ret.items()}
+
+    def has_key(self, key, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.has_key(key)
+
+    def incr(self, key, delta=1, version=None):
+        key = self.make_and_validate_key(key, version=version)
+        return self._cache.incr(key, delta)
+
+    def set_many(self, data, timeout=DEFAULT_TIMEOUT, version=None):
+        if not data:
+            return []
+        safe_data = {}
+        for key, value in data.items():
+            key = self.make_and_validate_key(key, version=version)
+            safe_data[key] = value
+        self._cache.set_many(safe_data, self.get_backend_timeout(timeout))
+        return []
+
+    def delete_many(self, keys, version=None):
+        if not keys:
+            return
+        safe_keys = [self.make_and_validate_key(key, version=version) for key in keys]
+        self._cache.delete_many(safe_keys)
+
+    def clear(self):
+        return self._cache.clear()

env/lib/python3.10/site-packages/django/core/cache/utils.py

@@ -0,0 +1,12 @@
+from hashlib import md5
+
+TEMPLATE_FRAGMENT_KEY_TEMPLATE = "template.cache.%s.%s"
+
+
+def make_template_fragment_key(fragment_name, vary_on=None):
+    hasher = md5(usedforsecurity=False)
+    if vary_on is not None:
+        for arg in vary_on:
+            hasher.update(str(arg).encode())
+            hasher.update(b":")
+    return TEMPLATE_FRAGMENT_KEY_TEMPLATE % (fragment_name, hasher.hexdigest())

env/lib/python3.10/site-packages/django/core/checks/__init__.py

@@ -0,0 +1,47 @@
+from .messages import (
+    CRITICAL,
+    DEBUG,
+    ERROR,
+    INFO,
+    WARNING,
+    CheckMessage,
+    Critical,
+    Debug,
+    Error,
+    Info,
+    Warning,
+)
+from .registry import Tags, register, run_checks, tag_exists
+
+# Import these to force registration of checks
+import django.core.checks.async_checks  # NOQA isort:skip
+import django.core.checks.caches  # NOQA isort:skip
+import django.core.checks.compatibility.django_4_0  # NOQA isort:skip
+import django.core.checks.database  # NOQA isort:skip
+import django.core.checks.files  # NOQA isort:skip
+import django.core.checks.model_checks  # NOQA isort:skip
+import django.core.checks.security.base  # NOQA isort:skip
+import django.core.checks.security.csrf  # NOQA isort:skip
+import django.core.checks.security.sessions  # NOQA isort:skip
+import django.core.checks.templates  # NOQA isort:skip
+import django.core.checks.translation  # NOQA isort:skip
+import django.core.checks.urls  # NOQA isort:skip
+
+
+__all__ = [
+    "CheckMessage",
+    "Debug",
+    "Info",
+    "Warning",
+    "Error",
+    "Critical",
+    "DEBUG",
+    "INFO",
+    "WARNING",
+    "ERROR",
+    "CRITICAL",
+    "register",
+    "run_checks",
+    "tag_exists",
+    "Tags",
+]

env/lib/python3.10/site-packages/django/core/checks/async_checks.py

@@ -0,0 +1,16 @@
+import os
+
+from . import Error, Tags, register
+
+E001 = Error(
+    "You should not set the DJANGO_ALLOW_ASYNC_UNSAFE environment variable in "
+    "deployment. This disables async safety protection.",
+    id="async.E001",
+)
+
+
+@register(Tags.async_support, deploy=True)
+def check_async_unsafe(app_configs, **kwargs):
+    if os.environ.get("DJANGO_ALLOW_ASYNC_UNSAFE"):
+        return [E001]
+    return []

env/lib/python3.10/site-packages/django/core/checks/caches.py

@@ -0,0 +1,76 @@
+import pathlib
+
+from django.conf import settings
+from django.core.cache import DEFAULT_CACHE_ALIAS, caches
+from django.core.cache.backends.filebased import FileBasedCache
+
+from . import Error, Tags, Warning, register
+
+E001 = Error(
+    "You must define a '%s' cache in your CACHES setting." % DEFAULT_CACHE_ALIAS,
+    id="caches.E001",
+)
+
+
+@register(Tags.caches)
+def check_default_cache_is_configured(app_configs, **kwargs):
+    if DEFAULT_CACHE_ALIAS not in settings.CACHES:
+        return [E001]
+    return []
+
+
+@register(Tags.caches, deploy=True)
+def check_cache_location_not_exposed(app_configs, **kwargs):
+    errors = []
+    for name in ("MEDIA_ROOT", "STATIC_ROOT", "STATICFILES_DIRS"):
+        setting = getattr(settings, name, None)
+        if not setting:
+            continue
+        if name == "STATICFILES_DIRS":
+            paths = set()
+            for staticfiles_dir in setting:
+                if isinstance(staticfiles_dir, (list, tuple)):
+                    _, staticfiles_dir = staticfiles_dir
+                paths.add(pathlib.Path(staticfiles_dir).resolve())
+        else:
+            paths = {pathlib.Path(setting).resolve()}
+        for alias in settings.CACHES:
+            cache = caches[alias]
+            if not isinstance(cache, FileBasedCache):
+                continue
+            cache_path = pathlib.Path(cache._dir).resolve()
+            if any(path == cache_path for path in paths):
+                relation = "matches"
+            elif any(path in cache_path.parents for path in paths):
+                relation = "is inside"
+            elif any(cache_path in path.parents for path in paths):
+                relation = "contains"
+            else:
+                continue
+            errors.append(
+                Warning(
+                    f"Your '{alias}' cache configuration might expose your cache "
+                    f"or lead to corruption of your data because its LOCATION "
+                    f"{relation} {name}.",
+                    id="caches.W002",
+                )
+            )
+    return errors
+
+
+@register(Tags.caches)
+def check_file_based_cache_is_absolute(app_configs, **kwargs):
+    errors = []
+    for alias, config in settings.CACHES.items():
+        cache = caches[alias]
+        if not isinstance(cache, FileBasedCache):
+            continue
+        if not pathlib.Path(config["LOCATION"]).is_absolute():
+            errors.append(
+                Warning(
+                    f"Your '{alias}' cache LOCATION path is relative. Use an "
+                    f"absolute path instead.",
+                    id="caches.W003",
+                )
+            )
+    return errors

env/lib/python3.10/site-packages/django/core/checks/compatibility/django_4_0.py

@@ -0,0 +1,20 @@
+from django.conf import settings
+
+from .. import Error, Tags, register
+
+
+@register(Tags.compatibility)
+def check_csrf_trusted_origins(app_configs, **kwargs):
+    errors = []
+    for origin in settings.CSRF_TRUSTED_ORIGINS:
+        if "://" not in origin:
+            errors.append(
+                Error(
+                    "As of Django 4.0, the values in the CSRF_TRUSTED_ORIGINS "
+                    "setting must start with a scheme (usually http:// or "
+                    "https://) but found %s. See the release notes for details."
+                    % origin,
+                    id="4_0.E001",
+                )
+            )
+    return errors

env/lib/python3.10/site-packages/django/core/checks/database.py

@@ -0,0 +1,14 @@
+from django.db import connections
+
+from . import Tags, register
+
+
+@register(Tags.database)
+def check_database_backends(databases=None, **kwargs):
+    if databases is None:
+        return []
+    issues = []
+    for alias in databases:
+        conn = connections[alias]
+        issues.extend(conn.validation.check(**kwargs))
+    return issues

env/lib/python3.10/site-packages/django/core/checks/files.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+
+from django.conf import settings
+
+from . import Error, Tags, register
+
+
+@register(Tags.files)
+def check_setting_file_upload_temp_dir(app_configs, **kwargs):
+    setting = getattr(settings, "FILE_UPLOAD_TEMP_DIR", None)
+    if setting and not Path(setting).is_dir():
+        return [
+            Error(
+                f"The FILE_UPLOAD_TEMP_DIR setting refers to the nonexistent "
+                f"directory '{setting}'.",
+                id="files.E001",
+            ),
+        ]
+    return []

env/lib/python3.10/site-packages/django/core/checks/messages.py

@@ -0,0 +1,81 @@
+# Levels
+DEBUG = 10
+INFO = 20
+WARNING = 30
+ERROR = 40
+CRITICAL = 50
+
+
+class CheckMessage:
+    def __init__(self, level, msg, hint=None, obj=None, id=None):
+        if not isinstance(level, int):
+            raise TypeError("The first argument should be level.")
+        self.level = level
+        self.msg = msg
+        self.hint = hint
+        self.obj = obj
+        self.id = id
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__) and all(
+            getattr(self, attr) == getattr(other, attr)
+            for attr in ["level", "msg", "hint", "obj", "id"]
+        )
+
+    def __str__(self):
+        from django.db import models
+
+        if self.obj is None:
+            obj = "?"
+        elif isinstance(self.obj, models.base.ModelBase):
+            # We need to hardcode ModelBase and Field cases because its __str__
+            # method doesn't return "applabel.modellabel" and cannot be changed.
+            obj = self.obj._meta.label
+        else:
+            obj = str(self.obj)
+        id = "(%s) " % self.id if self.id else ""
+        hint = "\n\tHINT: %s" % self.hint if self.hint else ""
+        return "%s: %s%s%s" % (obj, id, self.msg, hint)
+
+    def __repr__(self):
+        return "<%s: level=%r, msg=%r, hint=%r, obj=%r, id=%r>" % (
+            self.__class__.__name__,
+            self.level,
+            self.msg,
+            self.hint,
+            self.obj,
+            self.id,
+        )
+
+    def is_serious(self, level=ERROR):
+        return self.level >= level
+
+    def is_silenced(self):
+        from django.conf import settings
+
+        return self.id in settings.SILENCED_SYSTEM_CHECKS
+
+
+class Debug(CheckMessage):
+    def __init__(self, *args, **kwargs):
+        super().__init__(DEBUG, *args, **kwargs)
+
+
+class Info(CheckMessage):
+    def __init__(self, *args, **kwargs):
+        super().__init__(INFO, *args, **kwargs)
+
+
+class Warning(CheckMessage):
+    def __init__(self, *args, **kwargs):
+        super().__init__(WARNING, *args, **kwargs)
+
+
+class Error(CheckMessage):
+    def __init__(self, *args, **kwargs):
+        super().__init__(ERROR, *args, **kwargs)
+
+
+class Critical(CheckMessage):
+    def __init__(self, *args, **kwargs):
+        super().__init__(CRITICAL, *args, **kwargs)

env/lib/python3.10/site-packages/django/core/checks/model_checks.py

@@ -0,0 +1,227 @@
+import inspect
+import types
+from collections import defaultdict
+from itertools import chain
+
+from django.apps import apps
+from django.conf import settings
+from django.core.checks import Error, Tags, Warning, register
+
+
+@register(Tags.models)
+def check_all_models(app_configs=None, **kwargs):
+    db_table_models = defaultdict(list)
+    indexes = defaultdict(list)
+    constraints = defaultdict(list)
+    errors = []
+    if app_configs is None:
+        models = apps.get_models()
+    else:
+        models = chain.from_iterable(
+            app_config.get_models() for app_config in app_configs
+        )
+    for model in models:
+        if model._meta.managed and not model._meta.proxy:
+            db_table_models[model._meta.db_table].append(model._meta.label)
+        if not inspect.ismethod(model.check):
+            errors.append(
+                Error(
+                    "The '%s.check()' class method is currently overridden by %r."
+                    % (model.__name__, model.check),
+                    obj=model,
+                    id="models.E020",
+                )
+            )
+        else:
+            errors.extend(model.check(**kwargs))
+        for model_index in model._meta.indexes:
+            indexes[model_index.name].append(model._meta.label)
+        for model_constraint in model._meta.constraints:
+            constraints[model_constraint.name].append(model._meta.label)
+    if settings.DATABASE_ROUTERS:
+        error_class, error_id = Warning, "models.W035"
+        error_hint = (
+            "You have configured settings.DATABASE_ROUTERS. Verify that %s "
+            "are correctly routed to separate databases."
+        )
+    else:
+        error_class, error_id = Error, "models.E028"
+        error_hint = None
+    for db_table, model_labels in db_table_models.items():
+        if len(model_labels) != 1:
+            model_labels_str = ", ".join(model_labels)
+            errors.append(
+                error_class(
+                    "db_table '%s' is used by multiple models: %s."
+                    % (db_table, model_labels_str),
+                    obj=db_table,
+                    hint=(error_hint % model_labels_str) if error_hint else None,
+                    id=error_id,
+                )
+            )
+    for index_name, model_labels in indexes.items():
+        if len(model_labels) > 1:
+            model_labels = set(model_labels)
+            errors.append(
+                Error(
+                    "index name '%s' is not unique %s %s."
+                    % (
+                        index_name,
+                        "for model" if len(model_labels) == 1 else "among models:",
+                        ", ".join(sorted(model_labels)),
+                    ),
+                    id="models.E029" if len(model_labels) == 1 else "models.E030",
+                ),
+            )
+    for constraint_name, model_labels in constraints.items():
+        if len(model_labels) > 1:
+            model_labels = set(model_labels)
+            errors.append(
+                Error(
+                    "constraint name '%s' is not unique %s %s."
+                    % (
+                        constraint_name,
+                        "for model" if len(model_labels) == 1 else "among models:",
+                        ", ".join(sorted(model_labels)),
+                    ),
+                    id="models.E031" if len(model_labels) == 1 else "models.E032",
+                ),
+            )
+    return errors
+
+
+def _check_lazy_references(apps, ignore=None):
+    """
+    Ensure all lazy (i.e. string) model references have been resolved.
+
+    Lazy references are used in various places throughout Django, primarily in
+    related fields and model signals. Identify those common cases and provide
+    more helpful error messages for them.
+
+    The ignore parameter is used by StateApps to exclude swappable models from
+    this check.
+    """
+    pending_models = set(apps._pending_operations) - (ignore or set())
+
+    # Short circuit if there aren't any errors.
+    if not pending_models:
+        return []
+
+    from django.db.models import signals
+
+    model_signals = {
+        signal: name
+        for name, signal in vars(signals).items()
+        if isinstance(signal, signals.ModelSignal)
+    }
+
+    def extract_operation(obj):
+        """
+        Take a callable found in Apps._pending_operations and identify the
+        original callable passed to Apps.lazy_model_operation(). If that
+        callable was a partial, return the inner, non-partial function and
+        any arguments and keyword arguments that were supplied with it.
+
+        obj is a callback defined locally in Apps.lazy_model_operation() and
+        annotated there with a `func` attribute so as to imitate a partial.
+        """
+        operation, args, keywords = obj, [], {}
+        while hasattr(operation, "func"):
+            args.extend(getattr(operation, "args", []))
+            keywords.update(getattr(operation, "keywords", {}))
+            operation = operation.func
+        return operation, args, keywords
+
+    def app_model_error(model_key):
+        try:
+            apps.get_app_config(model_key[0])
+            model_error = "app '%s' doesn't provide model '%s'" % model_key
+        except LookupError:
+            model_error = "app '%s' isn't installed" % model_key[0]
+        return model_error
+
+    # Here are several functions which return CheckMessage instances for the
+    # most common usages of lazy operations throughout Django. These functions
+    # take the model that was being waited on as an (app_label, modelname)
+    # pair, the original lazy function, and its positional and keyword args as
+    # determined by extract_operation().
+
+    def field_error(model_key, func, args, keywords):
+        error_msg = (
+            "The field %(field)s was declared with a lazy reference "
+            "to '%(model)s', but %(model_error)s."
+        )
+        params = {
+            "model": ".".join(model_key),
+            "field": keywords["field"],
+            "model_error": app_model_error(model_key),
+        }
+        return Error(error_msg % params, obj=keywords["field"], id="fields.E307")
+
+    def signal_connect_error(model_key, func, args, keywords):
+        error_msg = (
+            "%(receiver)s was connected to the '%(signal)s' signal with a "
+            "lazy reference to the sender '%(model)s', but %(model_error)s."
+        )
+        receiver = args[0]
+        # The receiver is either a function or an instance of class
+        # defining a `__call__` method.
+        if isinstance(receiver, types.FunctionType):
+            description = "The function '%s'" % receiver.__name__
+        elif isinstance(receiver, types.MethodType):
+            description = "Bound method '%s.%s'" % (
+                receiver.__self__.__class__.__name__,
+                receiver.__name__,
+            )
+        else:
+            description = "An instance of class '%s'" % receiver.__class__.__name__
+        signal_name = model_signals.get(func.__self__, "unknown")
+        params = {
+            "model": ".".join(model_key),
+            "receiver": description,
+            "signal": signal_name,
+            "model_error": app_model_error(model_key),
+        }
+        return Error(error_msg % params, obj=receiver.__module__, id="signals.E001")
+
+    def default_error(model_key, func, args, keywords):
+        error_msg = (
+            "%(op)s contains a lazy reference to %(model)s, but %(model_error)s."
+        )
+        params = {
+            "op": func,
+            "model": ".".join(model_key),
+            "model_error": app_model_error(model_key),
+        }
+        return Error(error_msg % params, obj=func, id="models.E022")
+
+    # Maps common uses of lazy operations to corresponding error functions
+    # defined above. If a key maps to None, no error will be produced.
+    # default_error() will be used for usages that don't appear in this dict.
+    known_lazy = {
+        ("django.db.models.fields.related", "resolve_related_class"): field_error,
+        ("django.db.models.fields.related", "set_managed"): None,
+        ("django.dispatch.dispatcher", "connect"): signal_connect_error,
+    }
+
+    def build_error(model_key, func, args, keywords):
+        key = (func.__module__, func.__name__)
+        error_fn = known_lazy.get(key, default_error)
+        return error_fn(model_key, func, args, keywords) if error_fn else None
+
+    return sorted(
+        filter(
+            None,
+            (
+                build_error(model_key, *extract_operation(func))
+                for model_key in pending_models
+                for func in apps._pending_operations[model_key]
+            ),
+        ),
+        key=lambda error: error.msg,
+    )
+
+
+@register(Tags.models)
+def check_lazy_references(app_configs=None, **kwargs):
+    return _check_lazy_references(apps)

env/lib/python3.10/site-packages/django/core/checks/registry.py

@@ -0,0 +1,117 @@
+from itertools import chain
+
+from django.utils.inspect import func_accepts_kwargs
+from django.utils.itercompat import is_iterable
+
+
+class Tags:
+    """
+    Built-in tags for internal checks.
+    """
+
+    admin = "admin"
+    async_support = "async_support"
+    caches = "caches"
+    compatibility = "compatibility"
+    database = "database"
+    files = "files"
+    models = "models"
+    security = "security"
+    signals = "signals"
+    sites = "sites"
+    staticfiles = "staticfiles"
+    templates = "templates"
+    translation = "translation"
+    urls = "urls"
+
+
+class CheckRegistry:
+    def __init__(self):
+        self.registered_checks = set()
+        self.deployment_checks = set()
+
+    def register(self, check=None, *tags, **kwargs):
+        """
+        Can be used as a function or a decorator. Register given function
+        `f` labeled with given `tags`. The function should receive **kwargs
+        and return list of Errors and Warnings.
+
+        Example::
+
+            registry = CheckRegistry()
+            @registry.register('mytag', 'anothertag')
+            def my_check(app_configs, **kwargs):
+                # ... perform checks and collect `errors` ...
+                return errors
+            # or
+            registry.register(my_check, 'mytag', 'anothertag')
+        """
+
+        def inner(check):
+            if not func_accepts_kwargs(check):
+                raise TypeError(
+                    "Check functions must accept keyword arguments (**kwargs)."
+                )
+            check.tags = tags
+            checks = (
+                self.deployment_checks
+                if kwargs.get("deploy")
+                else self.registered_checks
+            )
+            checks.add(check)
+            return check
+
+        if callable(check):
+            return inner(check)
+        else:
+            if check:
+                tags += (check,)
+            return inner
+
+    def run_checks(
+        self,
+        app_configs=None,
+        tags=None,
+        include_deployment_checks=False,
+        databases=None,
+    ):
+        """
+        Run all registered checks and return list of Errors and Warnings.
+        """
+        errors = []
+        checks = self.get_checks(include_deployment_checks)
+
+        if tags is not None:
+            checks = [check for check in checks if not set(check.tags).isdisjoint(tags)]
+
+        for check in checks:
+            new_errors = check(app_configs=app_configs, databases=databases)
+            if not is_iterable(new_errors):
+                raise TypeError(
+                    "The function %r did not return a list. All functions "
+                    "registered with the checks registry must return a list." % check,
+                )
+            errors.extend(new_errors)
+        return errors
+
+    def tag_exists(self, tag, include_deployment_checks=False):
+        return tag in self.tags_available(include_deployment_checks)
+
+    def tags_available(self, deployment_checks=False):
+        return set(
+            chain.from_iterable(
+                check.tags for check in self.get_checks(deployment_checks)
+            )
+        )
+
+    def get_checks(self, include_deployment_checks=False):
+        checks = list(self.registered_checks)
+        if include_deployment_checks:
+            checks.extend(self.deployment_checks)
+        return checks
+
+
+registry = CheckRegistry()
+register = registry.register
+run_checks = registry.run_checks
+tag_exists = registry.tag_exists

env/lib/python3.10/site-packages/django/core/checks/security/base.py

@@ -0,0 +1,283 @@
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+
+from .. import Error, Tags, Warning, register
+
+CROSS_ORIGIN_OPENER_POLICY_VALUES = {
+    "same-origin",
+    "same-origin-allow-popups",
+    "unsafe-none",
+}
+REFERRER_POLICY_VALUES = {
+    "no-referrer",
+    "no-referrer-when-downgrade",
+    "origin",
+    "origin-when-cross-origin",
+    "same-origin",
+    "strict-origin",
+    "strict-origin-when-cross-origin",
+    "unsafe-url",
+}
+
+SECRET_KEY_INSECURE_PREFIX = "django-insecure-"
+SECRET_KEY_MIN_LENGTH = 50
+SECRET_KEY_MIN_UNIQUE_CHARACTERS = 5
+
+SECRET_KEY_WARNING_MSG = (
+    f"Your %s has less than {SECRET_KEY_MIN_LENGTH} characters, less than "
+    f"{SECRET_KEY_MIN_UNIQUE_CHARACTERS} unique characters, or it's prefixed "
+    f"with '{SECRET_KEY_INSECURE_PREFIX}' indicating that it was generated "
+    f"automatically by Django. Please generate a long and random value, "
+    f"otherwise many of Django's security-critical features will be "
+    f"vulnerable to attack."
+)
+
+W001 = Warning(
+    "You do not have 'django.middleware.security.SecurityMiddleware' "
+    "in your MIDDLEWARE so the SECURE_HSTS_SECONDS, "
+    "SECURE_CONTENT_TYPE_NOSNIFF, SECURE_REFERRER_POLICY, "
+    "SECURE_CROSS_ORIGIN_OPENER_POLICY, and SECURE_SSL_REDIRECT settings will "
+    "have no effect.",
+    id="security.W001",
+)
+
+W002 = Warning(
+    "You do not have "
+    "'django.middleware.clickjacking.XFrameOptionsMiddleware' in your "
+    "MIDDLEWARE, so your pages will not be served with an "
+    "'x-frame-options' header. Unless there is a good reason for your "
+    "site to be served in a frame, you should consider enabling this "
+    "header to help prevent clickjacking attacks.",
+    id="security.W002",
+)
+
+W004 = Warning(
+    "You have not set a value for the SECURE_HSTS_SECONDS setting. "
+    "If your entire site is served only over SSL, you may want to consider "
+    "setting a value and enabling HTTP Strict Transport Security. "
+    "Be sure to read the documentation first; enabling HSTS carelessly "
+    "can cause serious, irreversible problems.",
+    id="security.W004",
+)
+
+W005 = Warning(
+    "You have not set the SECURE_HSTS_INCLUDE_SUBDOMAINS setting to True. "
+    "Without this, your site is potentially vulnerable to attack "
+    "via an insecure connection to a subdomain. Only set this to True if "
+    "you are certain that all subdomains of your domain should be served "
+    "exclusively via SSL.",
+    id="security.W005",
+)
+
+W006 = Warning(
+    "Your SECURE_CONTENT_TYPE_NOSNIFF setting is not set to True, "
+    "so your pages will not be served with an "
+    "'X-Content-Type-Options: nosniff' header. "
+    "You should consider enabling this header to prevent the "
+    "browser from identifying content types incorrectly.",
+    id="security.W006",
+)
+
+W008 = Warning(
+    "Your SECURE_SSL_REDIRECT setting is not set to True. "
+    "Unless your site should be available over both SSL and non-SSL "
+    "connections, you may want to either set this setting True "
+    "or configure a load balancer or reverse-proxy server "
+    "to redirect all connections to HTTPS.",
+    id="security.W008",
+)
+
+W009 = Warning(
+    SECRET_KEY_WARNING_MSG % "SECRET_KEY",
+    id="security.W009",
+)
+
+W018 = Warning(
+    "You should not have DEBUG set to True in deployment.",
+    id="security.W018",
+)
+
+W019 = Warning(
+    "You have "
+    "'django.middleware.clickjacking.XFrameOptionsMiddleware' in your "
+    "MIDDLEWARE, but X_FRAME_OPTIONS is not set to 'DENY'. "
+    "Unless there is a good reason for your site to serve other parts of "
+    "itself in a frame, you should change it to 'DENY'.",
+    id="security.W019",
+)
+
+W020 = Warning(
+    "ALLOWED_HOSTS must not be empty in deployment.",
+    id="security.W020",
+)
+
+W021 = Warning(
+    "You have not set the SECURE_HSTS_PRELOAD setting to True. Without this, "
+    "your site cannot be submitted to the browser preload list.",
+    id="security.W021",
+)
+
+W022 = Warning(
+    "You have not set the SECURE_REFERRER_POLICY setting. Without this, your "
+    "site will not send a Referrer-Policy header. You should consider "
+    "enabling this header to protect user privacy.",
+    id="security.W022",
+)
+
+E023 = Error(
+    "You have set the SECURE_REFERRER_POLICY setting to an invalid value.",
+    hint="Valid values are: {}.".format(", ".join(sorted(REFERRER_POLICY_VALUES))),
+    id="security.E023",
+)
+
+E024 = Error(
+    "You have set the SECURE_CROSS_ORIGIN_OPENER_POLICY setting to an invalid "
+    "value.",
+    hint="Valid values are: {}.".format(
+        ", ".join(sorted(CROSS_ORIGIN_OPENER_POLICY_VALUES)),
+    ),
+    id="security.E024",
+)
+
+W025 = Warning(SECRET_KEY_WARNING_MSG, id="security.W025")
+
+
+def _security_middleware():
+    return "django.middleware.security.SecurityMiddleware" in settings.MIDDLEWARE
+
+
+def _xframe_middleware():
+    return (
+        "django.middleware.clickjacking.XFrameOptionsMiddleware" in settings.MIDDLEWARE
+    )
+
+
+@register(Tags.security, deploy=True)
+def check_security_middleware(app_configs, **kwargs):
+    passed_check = _security_middleware()
+    return [] if passed_check else [W001]
+
+
+@register(Tags.security, deploy=True)
+def check_xframe_options_middleware(app_configs, **kwargs):
+    passed_check = _xframe_middleware()
+    return [] if passed_check else [W002]
+
+
+@register(Tags.security, deploy=True)
+def check_sts(app_configs, **kwargs):
+    passed_check = not _security_middleware() or settings.SECURE_HSTS_SECONDS
+    return [] if passed_check else [W004]
+
+
+@register(Tags.security, deploy=True)
+def check_sts_include_subdomains(app_configs, **kwargs):
+    passed_check = (
+        not _security_middleware()
+        or not settings.SECURE_HSTS_SECONDS
+        or settings.SECURE_HSTS_INCLUDE_SUBDOMAINS is True
+    )
+    return [] if passed_check else [W005]
+
+
+@register(Tags.security, deploy=True)
+def check_sts_preload(app_configs, **kwargs):
+    passed_check = (
+        not _security_middleware()
+        or not settings.SECURE_HSTS_SECONDS
+        or settings.SECURE_HSTS_PRELOAD is True
+    )
+    return [] if passed_check else [W021]
+
+
+@register(Tags.security, deploy=True)
+def check_content_type_nosniff(app_configs, **kwargs):
+    passed_check = (
+        not _security_middleware() or settings.SECURE_CONTENT_TYPE_NOSNIFF is True
+    )
+    return [] if passed_check else [W006]
+
+
+@register(Tags.security, deploy=True)
+def check_ssl_redirect(app_configs, **kwargs):
+    passed_check = not _security_middleware() or settings.SECURE_SSL_REDIRECT is True
+    return [] if passed_check else [W008]
+
+
+def _check_secret_key(secret_key):
+    return (
+        len(set(secret_key)) >= SECRET_KEY_MIN_UNIQUE_CHARACTERS
+        and len(secret_key) >= SECRET_KEY_MIN_LENGTH
+        and not secret_key.startswith(SECRET_KEY_INSECURE_PREFIX)
+    )
+
+
+@register(Tags.security, deploy=True)
+def check_secret_key(app_configs, **kwargs):
+    try:
+        secret_key = settings.SECRET_KEY
+    except (ImproperlyConfigured, AttributeError):
+        passed_check = False
+    else:
+        passed_check = _check_secret_key(secret_key)
+    return [] if passed_check else [W009]
+
+
+@register(Tags.security, deploy=True)
+def check_secret_key_fallbacks(app_configs, **kwargs):
+    warnings = []
+    try:
+        fallbacks = settings.SECRET_KEY_FALLBACKS
+    except (ImproperlyConfigured, AttributeError):
+        warnings.append(Warning(W025.msg % "SECRET_KEY_FALLBACKS", id=W025.id))
+    else:
+        for index, key in enumerate(fallbacks):
+            if not _check_secret_key(key):
+                warnings.append(
+                    Warning(W025.msg % f"SECRET_KEY_FALLBACKS[{index}]", id=W025.id)
+                )
+    return warnings
+
+
+@register(Tags.security, deploy=True)
+def check_debug(app_configs, **kwargs):
+    passed_check = not settings.DEBUG
+    return [] if passed_check else [W018]
+
+
+@register(Tags.security, deploy=True)
+def check_xframe_deny(app_configs, **kwargs):
+    passed_check = not _xframe_middleware() or settings.X_FRAME_OPTIONS == "DENY"
+    return [] if passed_check else [W019]
+
+
+@register(Tags.security, deploy=True)
+def check_allowed_hosts(app_configs, **kwargs):
+    return [] if settings.ALLOWED_HOSTS else [W020]
+
+
+@register(Tags.security, deploy=True)
+def check_referrer_policy(app_configs, **kwargs):
+    if _security_middleware():
+        if settings.SECURE_REFERRER_POLICY is None:
+            return [W022]
+        # Support a comma-separated string or iterable of values to allow fallback.
+        if isinstance(settings.SECURE_REFERRER_POLICY, str):
+            values = {v.strip() for v in settings.SECURE_REFERRER_POLICY.split(",")}
+        else:
+            values = set(settings.SECURE_REFERRER_POLICY)
+        if not values <= REFERRER_POLICY_VALUES:
+            return [E023]
+    return []
+
+
+@register(Tags.security, deploy=True)
+def check_cross_origin_opener_policy(app_configs, **kwargs):
+    if (
+        _security_middleware()
+        and settings.SECURE_CROSS_ORIGIN_OPENER_POLICY is not None
+        and settings.SECURE_CROSS_ORIGIN_OPENER_POLICY
+        not in CROSS_ORIGIN_OPENER_POLICY_VALUES
+    ):
+        return [E024]
+    return []

env/lib/python3.10/site-packages/django/core/checks/security/csrf.py

@@ -0,0 +1,67 @@
+import inspect
+
+from django.conf import settings
+
+from .. import Error, Tags, Warning, register
+
+W003 = Warning(
+    "You don't appear to be using Django's built-in "
+    "cross-site request forgery protection via the middleware "
+    "('django.middleware.csrf.CsrfViewMiddleware' is not in your "
+    "MIDDLEWARE). Enabling the middleware is the safest approach "
+    "to ensure you don't leave any holes.",
+    id="security.W003",
+)
+
+W016 = Warning(
+    "You have 'django.middleware.csrf.CsrfViewMiddleware' in your "
+    "MIDDLEWARE, but you have not set CSRF_COOKIE_SECURE to True. "
+    "Using a secure-only CSRF cookie makes it more difficult for network "
+    "traffic sniffers to steal the CSRF token.",
+    id="security.W016",
+)
+
+
+def _csrf_middleware():
+    return "django.middleware.csrf.CsrfViewMiddleware" in settings.MIDDLEWARE
+
+
+@register(Tags.security, deploy=True)
+def check_csrf_middleware(app_configs, **kwargs):
+    passed_check = _csrf_middleware()
+    return [] if passed_check else [W003]
+
+
+@register(Tags.security, deploy=True)
+def check_csrf_cookie_secure(app_configs, **kwargs):
+    passed_check = (
+        settings.CSRF_USE_SESSIONS
+        or not _csrf_middleware()
+        or settings.CSRF_COOKIE_SECURE is True
+    )
+    return [] if passed_check else [W016]
+
+
+@register(Tags.security)
+def check_csrf_failure_view(app_configs, **kwargs):
+    from django.middleware.csrf import _get_failure_view
+
+    errors = []
+    try:
+        view = _get_failure_view()
+    except ImportError:
+        msg = (
+            "The CSRF failure view '%s' could not be imported."
+            % settings.CSRF_FAILURE_VIEW
+        )
+        errors.append(Error(msg, id="security.E102"))
+    else:
+        try:
+            inspect.signature(view).bind(None, reason=None)
+        except TypeError:
+            msg = (
+                "The CSRF failure view '%s' does not take the correct number of "
+                "arguments." % settings.CSRF_FAILURE_VIEW
+            )
+            errors.append(Error(msg, id="security.E101"))
+    return errors

env/lib/python3.10/site-packages/django/core/checks/security/sessions.py

@@ -0,0 +1,99 @@
+from django.conf import settings
+
+from .. import Tags, Warning, register
+
+
+def add_session_cookie_message(message):
+    return message + (
+        " Using a secure-only session cookie makes it more difficult for "
+        "network traffic sniffers to hijack user sessions."
+    )
+
+
+W010 = Warning(
+    add_session_cookie_message(
+        "You have 'django.contrib.sessions' in your INSTALLED_APPS, "
+        "but you have not set SESSION_COOKIE_SECURE to True."
+    ),
+    id="security.W010",
+)
+
+W011 = Warning(
+    add_session_cookie_message(
+        "You have 'django.contrib.sessions.middleware.SessionMiddleware' "
+        "in your MIDDLEWARE, but you have not set "
+        "SESSION_COOKIE_SECURE to True."
+    ),
+    id="security.W011",
+)
+
+W012 = Warning(
+    add_session_cookie_message("SESSION_COOKIE_SECURE is not set to True."),
+    id="security.W012",
+)
+
+
+def add_httponly_message(message):
+    return message + (
+        " Using an HttpOnly session cookie makes it more difficult for "
+        "cross-site scripting attacks to hijack user sessions."
+    )
+
+
+W013 = Warning(
+    add_httponly_message(
+        "You have 'django.contrib.sessions' in your INSTALLED_APPS, "
+        "but you have not set SESSION_COOKIE_HTTPONLY to True.",
+    ),
+    id="security.W013",
+)
+
+W014 = Warning(
+    add_httponly_message(
+        "You have 'django.contrib.sessions.middleware.SessionMiddleware' "
+        "in your MIDDLEWARE, but you have not set "
+        "SESSION_COOKIE_HTTPONLY to True."
+    ),
+    id="security.W014",
+)
+
+W015 = Warning(
+    add_httponly_message("SESSION_COOKIE_HTTPONLY is not set to True."),
+    id="security.W015",
+)
+
+
+@register(Tags.security, deploy=True)
+def check_session_cookie_secure(app_configs, **kwargs):
+    if settings.SESSION_COOKIE_SECURE is True:
+        return []
+    errors = []
+    if _session_app():
+        errors.append(W010)
+    if _session_middleware():
+        errors.append(W011)
+    if len(errors) > 1:
+        errors = [W012]
+    return errors
+
+
+@register(Tags.security, deploy=True)
+def check_session_cookie_httponly(app_configs, **kwargs):
+    if settings.SESSION_COOKIE_HTTPONLY is True:
+        return []
+    errors = []
+    if _session_app():
+        errors.append(W013)
+    if _session_middleware():
+        errors.append(W014)
+    if len(errors) > 1:
+        errors = [W015]
+    return errors
+
+
+def _session_middleware():
+    return "django.contrib.sessions.middleware.SessionMiddleware" in settings.MIDDLEWARE
+
+
+def _session_app():
+    return "django.contrib.sessions" in settings.INSTALLED_APPS

env/lib/python3.10/site-packages/django/core/checks/templates.py

@@ -0,0 +1,75 @@
+import copy
+from collections import defaultdict
+
+from django.conf import settings
+from django.template.backends.django import get_template_tag_modules
+
+from . import Error, Tags, Warning, register
+
+E001 = Error(
+    "You have 'APP_DIRS': True in your TEMPLATES but also specify 'loaders' "
+    "in OPTIONS. Either remove APP_DIRS or remove the 'loaders' option.",
+    id="templates.E001",
+)
+E002 = Error(
+    "'string_if_invalid' in TEMPLATES OPTIONS must be a string but got: {} ({}).",
+    id="templates.E002",
+)
+W003 = Warning(
+    "{} is used for multiple template tag modules: {}",
+    id="templates.E003",
+)
+
+
+@register(Tags.templates)
+def check_setting_app_dirs_loaders(app_configs, **kwargs):
+    return (
+        [E001]
+        if any(
+            conf.get("APP_DIRS") and "loaders" in conf.get("OPTIONS", {})
+            for conf in settings.TEMPLATES
+        )
+        else []
+    )
+
+
+@register(Tags.templates)
+def check_string_if_invalid_is_string(app_configs, **kwargs):
+    errors = []
+    for conf in settings.TEMPLATES:
+        string_if_invalid = conf.get("OPTIONS", {}).get("string_if_invalid", "")
+        if not isinstance(string_if_invalid, str):
+            error = copy.copy(E002)
+            error.msg = error.msg.format(
+                string_if_invalid, type(string_if_invalid).__name__
+            )
+            errors.append(error)
+    return errors
+
+
+@register(Tags.templates)
+def check_for_template_tags_with_the_same_name(app_configs, **kwargs):
+    errors = []
+    libraries = defaultdict(set)
+
+    for conf in settings.TEMPLATES:
+        custom_libraries = conf.get("OPTIONS", {}).get("libraries", {})
+        for module_name, module_path in custom_libraries.items():
+            libraries[module_name].add(module_path)
+
+    for module_name, module_path in get_template_tag_modules():
+        libraries[module_name].add(module_path)
+
+    for library_name, items in libraries.items():
+        if len(items) > 1:
+            errors.append(
+                Warning(
+                    W003.msg.format(
+                        repr(library_name),
+                        ", ".join(repr(item) for item in sorted(items)),
+                    ),
+                    id=W003.id,
+                )
+            )
+
+    return errors

env/lib/python3.10/site-packages/django/core/checks/translation.py

@@ -0,0 +1,66 @@
+from django.conf import settings
+from django.utils.translation import get_supported_language_variant
+from django.utils.translation.trans_real import language_code_re
+
+from . import Error, Tags, register
+
+E001 = Error(
+    "You have provided an invalid value for the LANGUAGE_CODE setting: {!r}.",
+    id="translation.E001",
+)
+
+E002 = Error(
+    "You have provided an invalid language code in the LANGUAGES setting: {!r}.",
+    id="translation.E002",
+)
+
+E003 = Error(
+    "You have provided an invalid language code in the LANGUAGES_BIDI setting: {!r}.",
+    id="translation.E003",
+)
+
+E004 = Error(
+    "You have provided a value for the LANGUAGE_CODE setting that is not in "
+    "the LANGUAGES setting.",
+    id="translation.E004",
+)
+
+
+@register(Tags.translation)
+def check_setting_language_code(app_configs, **kwargs):
+    """Error if LANGUAGE_CODE setting is invalid."""
+    tag = settings.LANGUAGE_CODE
+    if not isinstance(tag, str) or not language_code_re.match(tag):
+        return [Error(E001.msg.format(tag), id=E001.id)]
+    return []
+
+
+@register(Tags.translation)
+def check_setting_languages(app_configs, **kwargs):
+    """Error if LANGUAGES setting is invalid."""
+    return [
+        Error(E002.msg.format(tag), id=E002.id)
+        for tag, _ in settings.LANGUAGES
+        if not isinstance(tag, str) or not language_code_re.match(tag)
+    ]
+
+
+@register(Tags.translation)
+def check_setting_languages_bidi(app_configs, **kwargs):
+    """Error if LANGUAGES_BIDI setting is invalid."""
+    return [
+        Error(E003.msg.format(tag), id=E003.id)
+        for tag in settings.LANGUAGES_BIDI
+        if not isinstance(tag, str) or not language_code_re.match(tag)
+    ]
+
+
+@register(Tags.translation)
+def check_language_settings_consistent(app_configs, **kwargs):
+    """Error if language settings are not consistent with each other."""
+    try:
+        get_supported_language_variant(settings.LANGUAGE_CODE)
+    except LookupError:
+        return [E004]
+    else:
+        return []

env/lib/python3.10/site-packages/django/core/checks/urls.py

@@ -0,0 +1,117 @@
+from collections import Counter
+
+from django.conf import settings
+
+from . import Error, Tags, Warning, register
+
+
+@register(Tags.urls)
+def check_url_config(app_configs, **kwargs):
+    if getattr(settings, "ROOT_URLCONF", None):
+        from django.urls import get_resolver
+
+        resolver = get_resolver()
+        return check_resolver(resolver)
+    return []
+
+
+def check_resolver(resolver):
+    """
+    Recursively check the resolver.
+    """
+    check_method = getattr(resolver, "check", None)
+    if check_method is not None:
+        return check_method()
+    elif not hasattr(resolver, "resolve"):
+        return get_warning_for_invalid_pattern(resolver)
+    else:
+        return []
+
+
+@register(Tags.urls)
+def check_url_namespaces_unique(app_configs, **kwargs):
+    """
+    Warn if URL namespaces used in applications aren't unique.
+    """
+    if not getattr(settings, "ROOT_URLCONF", None):
+        return []
+
+    from django.urls import get_resolver
+
+    resolver = get_resolver()
+    all_namespaces = _load_all_namespaces(resolver)
+    counter = Counter(all_namespaces)
+    non_unique_namespaces = [n for n, count in counter.items() if count > 1]
+    errors = []
+    for namespace in non_unique_namespaces:
+        errors.append(
+            Warning(
+                "URL namespace '{}' isn't unique. You may not be able to reverse "
+                "all URLs in this namespace".format(namespace),
+                id="urls.W005",
+            )
+        )
+    return errors
+
+
+def _load_all_namespaces(resolver, parents=()):
+    """
+    Recursively load all namespaces from URL patterns.
+    """
+    url_patterns = getattr(resolver, "url_patterns", [])
+    namespaces = [
+        ":".join(parents + (url.namespace,))
+        for url in url_patterns
+        if getattr(url, "namespace", None) is not None
+    ]
+    for pattern in url_patterns:
+        namespace = getattr(pattern, "namespace", None)
+        current = parents
+        if namespace is not None:
+            current += (namespace,)
+        namespaces.extend(_load_all_namespaces(pattern, current))
+    return namespaces
+
+
+def get_warning_for_invalid_pattern(pattern):
+    """
+    Return a list containing a warning that the pattern is invalid.
+
+    describe_pattern() cannot be used here, because we cannot rely on the
+    urlpattern having regex or name attributes.
+    """
+    if isinstance(pattern, str):
+        hint = (
+            "Try removing the string '{}'. The list of urlpatterns should not "
+            "have a prefix string as the first element.".format(pattern)
+        )
+    elif isinstance(pattern, tuple):
+        hint = "Try using path() instead of a tuple."
+    else:
+        hint = None
+
+    return [
+        Error(
+            "Your URL pattern {!r} is invalid. Ensure that urlpatterns is a list "
+            "of path() and/or re_path() instances.".format(pattern),
+            hint=hint,
+            id="urls.E004",
+        )
+    ]
+
+
+@register(Tags.urls)
+def check_url_settings(app_configs, **kwargs):
+    errors = []
+    for name in ("STATIC_URL", "MEDIA_URL"):
+        value = getattr(settings, name)
+        if value and not value.endswith("/"):
+            errors.append(E006(name))
+    return errors
+
+
+def E006(name):
+    return Error(
+        "The {} setting must end with a slash.".format(name),
+        id="urls.E006",
+    )

env/lib/python3.10/site-packages/django/core/exceptions.py

@@ -0,0 +1,255 @@
+"""
+Global Django exception and warning classes.
+"""
+
+import operator
+
+from django.utils.hashable import make_hashable
+
+
+class FieldDoesNotExist(Exception):
+    """The requested model field does not exist"""
+
+    pass
+
+
+class AppRegistryNotReady(Exception):
+    """The django.apps registry is not populated yet"""
+
+    pass
+
+
+class ObjectDoesNotExist(Exception):
+    """The requested object does not exist"""
+
+    silent_variable_failure = True
+
+
+class MultipleObjectsReturned(Exception):
+    """The query returned multiple objects when only one was expected."""
+
+    pass
+
+
+class SuspiciousOperation(Exception):
+    """The user did something suspicious"""
+
+
+class SuspiciousMultipartForm(SuspiciousOperation):
+    """Suspect MIME request in multipart form data"""
+
+    pass
+
+
+class SuspiciousFileOperation(SuspiciousOperation):
+    """A Suspicious filesystem operation was attempted"""
+
+    pass
+
+
+class DisallowedHost(SuspiciousOperation):
+    """HTTP_HOST header contains invalid value"""
+
+    pass
+
+
+class DisallowedRedirect(SuspiciousOperation):
+    """Redirect to scheme not in allowed list"""
+
+    pass
+
+
+class TooManyFieldsSent(SuspiciousOperation):
+    """
+    The number of fields in a GET or POST request exceeded
+    settings.DATA_UPLOAD_MAX_NUMBER_FIELDS.
+    """
+
+    pass
+
+
+class TooManyFilesSent(SuspiciousOperation):
+    """
+    The number of fields in a GET or POST request exceeded
+    settings.DATA_UPLOAD_MAX_NUMBER_FILES.
+    """
+
+    pass
+
+
+class RequestDataTooBig(SuspiciousOperation):
+    """
+    The size of the request (excluding any file uploads) exceeded
+    settings.DATA_UPLOAD_MAX_MEMORY_SIZE.
+    """
+
+    pass
+
+
+class RequestAborted(Exception):
+    """The request was closed before it was completed, or timed out."""
+
+    pass
+
+
+class BadRequest(Exception):
+    """The request is malformed and cannot be processed."""
+
+    pass
+
+
+class PermissionDenied(Exception):
+    """The user did not have permission to do that"""
+
+    pass
+
+
+class ViewDoesNotExist(Exception):
+    """The requested view does not exist"""
+
+    pass
+
+
+class MiddlewareNotUsed(Exception):
+    """This middleware is not used in this server configuration"""
+
+    pass
+
+
+class ImproperlyConfigured(Exception):
+    """Django is somehow improperly configured"""
+
+    pass
+
+
+class FieldError(Exception):
+    """Some kind of problem with a model field."""
+
+    pass
+
+
+NON_FIELD_ERRORS = "__all__"
+
+
+class ValidationError(Exception):
+    """An error while validating data."""
+
+    def __init__(self, message, code=None, params=None):
+        """
+        The `message` argument can be a single error, a list of errors, or a
+        dictionary that maps field names to lists of errors. What we define as
+        an "error" can be either a simple string or an instance of
+        ValidationError with its message attribute set, and what we define as
+        list or dictionary can be an actual `list` or `dict` or an instance
+        of ValidationError with its `error_list` or `error_dict` attribute set.
+        """
+        super().__init__(message, code, params)
+
+        if isinstance(message, ValidationError):
+            if hasattr(message, "error_dict"):
+                message = message.error_dict
+            elif not hasattr(message, "message"):
+                message = message.error_list
+            else:
+                message, code, params = message.message, message.code, message.params
+
+        if isinstance(message, dict):
+            self.error_dict = {}
+            for field, messages in message.items():
+                if not isinstance(messages, ValidationError):
+                    messages = ValidationError(messages)
+                self.error_dict[field] = messages.error_list
+
+        elif isinstance(message, list):
+            self.error_list = []
+            for message in message:
+                # Normalize plain strings to instances of ValidationError.
+                if not isinstance(message, ValidationError):
+                    message = ValidationError(message)
+                if hasattr(message, "error_dict"):
+                    self.error_list.extend(sum(message.error_dict.values(), []))
+                else:
+                    self.error_list.extend(message.error_list)
+
+        else:
+            self.message = message
+            self.code = code
+            self.params = params
+            self.error_list = [self]
+
+    @property
+    def message_dict(self):
+        # Trigger an AttributeError if this ValidationError
+        # doesn't have an error_dict.
+        getattr(self, "error_dict")
+
+        return dict(self)
+
+    @property
+    def messages(self):
+        if hasattr(self, "error_dict"):
+            return sum(dict(self).values(), [])
+        return list(self)
+
+    def update_error_dict(self, error_dict):
+        if hasattr(self, "error_dict"):
+            for field, error_list in self.error_dict.items():
+                error_dict.setdefault(field, []).extend(error_list)
+        else:
+            error_dict.setdefault(NON_FIELD_ERRORS, []).extend(self.error_list)
+        return error_dict
+
+    def __iter__(self):
+        if hasattr(self, "error_dict"):
+            for field, errors in self.error_dict.items():
+                yield field, list(ValidationError(errors))
+        else:
+            for error in self.error_list:
+                message = error.message
+                if error.params:
+                    message %= error.params
+                yield str(message)
+
+    def __str__(self):
+        if hasattr(self, "error_dict"):
+            return repr(dict(self))
+        return repr(list(self))
+
+    def __repr__(self):
+        return "ValidationError(%s)" % self
+
+    def __eq__(self, other):
+        if not isinstance(other, ValidationError):
+            return NotImplemented
+        return hash(self) == hash(other)
+
+    def __hash__(self):
+        if hasattr(self, "message"):
+            return hash(
+                (
+                    self.message,
+                    self.code,
+                    make_hashable(self.params),
+                )
+            )
+        if hasattr(self, "error_dict"):
+            return hash(make_hashable(self.error_dict))
+        return hash(tuple(sorted(self.error_list, key=operator.attrgetter("message"))))
+
+
+class EmptyResultSet(Exception):
+    """A database query predicate is impossible."""
+
+    pass
+
+
+class FullResultSet(Exception):
+    """A database query predicate is matches everything."""
+
+    pass
+
+
+class SynchronousOnlyOperation(Exception):
+    """The user tried to call a sync-only function from an async context."""
+
+    pass

env/lib/python3.10/site-packages/django/core/files/__init__.py

@@ -0,0 +1,3 @@
+from django.core.files.base import File
+
+__all__ = ["File"]

env/lib/python3.10/site-packages/django/core/files/base.py

@@ -0,0 +1,161 @@
+import os
+from io import BytesIO, StringIO, UnsupportedOperation
+
+from django.core.files.utils import FileProxyMixin
+from django.utils.functional import cached_property
+
+
+class File(FileProxyMixin):
+    DEFAULT_CHUNK_SIZE = 64 * 2**10
+
+    def __init__(self, file, name=None):
+        self.file = file
+        if name is None:
+            name = getattr(file, "name", None)
+        self.name = name
+        if hasattr(file, "mode"):
+            self.mode = file.mode
+
+    def __str__(self):
+        return self.name or ""
+
+    def __repr__(self):
+        return "<%s: %s>" % (self.__class__.__name__, self or "None")
+
+    def __bool__(self):
+        return bool(self.name)
+
+    def __len__(self):
+        return self.size
+
+    @cached_property
+    def size(self):
+        if hasattr(self.file, "size"):
+            return self.file.size
+        if hasattr(self.file, "name"):
+            try:
+                return os.path.getsize(self.file.name)
+            except (OSError, TypeError):
+                pass
+        if hasattr(self.file, "tell") and hasattr(self.file, "seek"):
+            pos = self.file.tell()
+            self.file.seek(0, os.SEEK_END)
+            size = self.file.tell()
+            self.file.seek(pos)
+            return size
+        raise AttributeError("Unable to determine the file's size.")
+
+    def chunks(self, chunk_size=None):
+        """
+        Read the file and yield chunks of ``chunk_size`` bytes (defaults to
+        ``File.DEFAULT_CHUNK_SIZE``).
+        """
+        chunk_size = chunk_size or self.DEFAULT_CHUNK_SIZE
+        try:
+            self.seek(0)
+        except (AttributeError, UnsupportedOperation):
+            pass
+
+        while True:
+            data = self.read(chunk_size)
+            if not data:
+                break
+            yield data
+
+    def multiple_chunks(self, chunk_size=None):
+        """
+        Return ``True`` if you can expect multiple chunks.
+
+        NB: If a particular file representation is in memory, subclasses should
+        always return ``False`` -- there's no good reason to read from memory in
+        chunks.
+        """
+        return self.size > (chunk_size or self.DEFAULT_CHUNK_SIZE)
+
+    def __iter__(self):
+        # Iterate over this file-like object by newlines
+        buffer_ = None
+        for chunk in self.chunks():
+            for line in chunk.splitlines(True):
+                if buffer_:
+                    if endswith_cr(buffer_) and not equals_lf(line):
+                        # Line split after a \r newline; yield buffer_.
+                        yield buffer_
+                        # Continue with line.
+                    else:
+                        # Line either split without a newline (line
+                        # continues after buffer_) or with \r\n
+                        # newline (line == b'\n').
+                        line = buffer_ + line
+                    # buffer_ handled, clear it.
+                    buffer_ = None
+
+                # If this is the end of a \n or \r\n line, yield.
+                if endswith_lf(line):
+                    yield line
+                else:
+                    buffer_ = line
+
+        if buffer_ is not None:
+            yield buffer_
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close()
+
+    def open(self, mode=None, *args, **kwargs):
+        if not self.closed:
+            self.seek(0)
+        elif self.name and os.path.exists(self.name):
+            self.file = open(self.name, mode or self.mode, *args, **kwargs)
+        else:
+            raise ValueError("The file cannot be reopened.")
+        return self
+
+    def close(self):
+        self.file.close()
+
+
+class ContentFile(File):
+    """
+    A File-like object that takes just raw content, rather than an actual file.
+    """
+
+    def __init__(self, content, name=None):
+        stream_class = StringIO if isinstance(content, str) else BytesIO
+        super().__init__(stream_class(content), name=name)
+        self.size = len(content)
+
+    def __str__(self):
+        return "Raw content"
+
+    def __bool__(self):
+        return True
+
+    def open(self, mode=None):
+        self.seek(0)
+        return self
+
+    def close(self):
+        pass
+
+    def write(self, data):
+        self.__dict__.pop("size", None)  # Clear the computed size.
+        return self.file.write(data)
+
+
+def endswith_cr(line):
+    """Return True if line (a text or bytestring) ends with '\r'."""
+    return line.endswith("\r" if isinstance(line, str) else b"\r")
+
+
+def endswith_lf(line):
+    """Return True if line (a text or bytestring) ends with '\n'."""
+    return line.endswith("\n" if isinstance(line, str) else b"\n")
+
+
+def equals_lf(line):
+    """Return True if line (a text or bytestring) equals '\n'."""
+    return line == ("\n" if isinstance(line, str) else b"\n")

env/lib/python3.10/site-packages/django/core/files/images.py

@@ -0,0 +1,89 @@
+"""
+Utility functions for handling images.
+
+Requires Pillow as you might imagine.
+"""
+
+import struct
+import zlib
+
+from django.core.files import File
+
+
+class ImageFile(File):
+    """
+    A mixin for use alongside django.core.files.base.File, which provides
+    additional features for dealing with images.
+    """
+
+    @property
+    def width(self):
+        return self._get_image_dimensions()[0]
+
+    @property
+    def height(self):
+        return self._get_image_dimensions()[1]
+
+    def _get_image_dimensions(self):
+        if not hasattr(self, "_dimensions_cache"):
+            close = self.closed
+            self.open()
+            self._dimensions_cache = get_image_dimensions(self, close=close)
+        return self._dimensions_cache
+
+
+def get_image_dimensions(file_or_path, close=False):
+    """
+    Return the (width, height) of an image, given an open file or a path.  Set
+    'close' to True to close the file at the end if it is initially in an open
+    state.
+    """
+    from PIL import ImageFile as PillowImageFile
+
+    p = PillowImageFile.Parser()
+    if hasattr(file_or_path, "read"):
+        file = file_or_path
+        file_pos = file.tell()
+        file.seek(0)
+    else:
+        try:
+            file = open(file_or_path, "rb")
+        except OSError:
+            return (None, None)
+        close = True
+    try:
+        # Most of the time Pillow only needs a small chunk to parse the image
+        # and get the dimensions, but with some TIFF files Pillow needs to
+        # parse the whole file.
+        chunk_size = 1024
+        while 1:
+            data = file.read(chunk_size)
+            if not data:
+                break
+            try:
+                p.feed(data)
+            except zlib.error as e:
+                # ignore zlib complaining on truncated stream, just feed more
+                # data to parser (ticket #19457).
+                if e.args[0].startswith("Error -5"):
+                    pass
+                else:
+                    raise
+            except struct.error:
+                # Ignore PIL failing on a too short buffer when reads return
+                # less bytes than expected. Skip and feed more data to the
+                # parser (ticket #24544).
+                pass
+            except RuntimeError:
+                # e.g. "RuntimeError: could not create decoder object" for
+                # WebP files. A different chunk_size may work.
+                pass
+            if p.image:
+                return p.image.size
+            chunk_size *= 2
+        return (None, None)
+    finally:
+        if close:
+            file.close()
+        else:
+            file.seek(file_pos)

env/lib/python3.10/site-packages/django/core/files/locks.py

@@ -0,0 +1,128 @@
+"""
+Portable file locking utilities.
+
+Based partially on an example by Jonathan Feignberg in the Python
+Cookbook [1] (licensed under the Python Software License) and a ctypes port by
+Anatoly Techtonik for Roundup [2] (license [3]).
+
+[1] https://code.activestate.com/recipes/65203/
+[2] https://sourceforge.net/p/roundup/code/ci/default/tree/roundup/backends/portalocker.py  # NOQA
+[3] https://sourceforge.net/p/roundup/code/ci/default/tree/COPYING.txt
+
+Example Usage::
+
+    >>> from django.core.files import locks
+    >>> with open('./file', 'wb') as f:
+    ...     locks.lock(f, locks.LOCK_EX)
+    ...     f.write('Django')
+"""
+
+import os
+
+__all__ = ("LOCK_EX", "LOCK_SH", "LOCK_NB", "lock", "unlock")
+
+
+def _fd(f):
+    """Get a filedescriptor from something which could be a file or an fd."""
+    return f.fileno() if hasattr(f, "fileno") else f
+
+
+if os.name == "nt":
+    import msvcrt
+    from ctypes import (
+        POINTER,
+        Structure,
+        Union,
+        WinDLL,
+        byref,
+        c_int64,
+        c_ulong,
+        c_void_p,
+        sizeof,
+    )
+    from ctypes.wintypes import BOOL, DWORD, HANDLE
+
+    LOCK_SH = 0  # the default
+    LOCK_NB = 0x1  # LOCKFILE_FAIL_IMMEDIATELY
+    LOCK_EX = 0x2  # LOCKFILE_EXCLUSIVE_LOCK
+
+    # --- Adapted from the pyserial project ---
+    # detect size of ULONG_PTR
+    if sizeof(c_ulong) != sizeof(c_void_p):
+        ULONG_PTR = c_int64
+    else:
+        ULONG_PTR = c_ulong
+    PVOID = c_void_p
+
+    # --- Union inside Structure by stackoverflow:3480240 ---
+    class _OFFSET(Structure):
+        _fields_ = [("Offset", DWORD), ("OffsetHigh", DWORD)]
+
+    class _OFFSET_UNION(Union):
+        _anonymous_ = ["_offset"]
+        _fields_ = [("_offset", _OFFSET), ("Pointer", PVOID)]
+
+    class OVERLAPPED(Structure):
+        _anonymous_ = ["_offset_union"]
+        _fields_ = [
+            ("Internal", ULONG_PTR),
+            ("InternalHigh", ULONG_PTR),
+            ("_offset_union", _OFFSET_UNION),
+            ("hEvent", HANDLE),
+        ]
+
+    LPOVERLAPPED = POINTER(OVERLAPPED)
+
+    # --- Define function prototypes for extra safety ---
+    kernel32 = WinDLL("kernel32")
+    LockFileEx = kernel32.LockFileEx
+    LockFileEx.restype = BOOL
+    LockFileEx.argtypes = [HANDLE, DWORD, DWORD, DWORD, DWORD, LPOVERLAPPED]
+    UnlockFileEx = kernel32.UnlockFileEx
+    UnlockFileEx.restype = BOOL
+    UnlockFileEx.argtypes = [HANDLE, DWORD, DWORD, DWORD, LPOVERLAPPED]
+
+    def lock(f, flags):
+        hfile = msvcrt.get_osfhandle(_fd(f))
+        overlapped = OVERLAPPED()
+        ret = LockFileEx(hfile, flags, 0, 0, 0xFFFF0000, byref(overlapped))
+        return bool(ret)
+
+    def unlock(f):
+        hfile = msvcrt.get_osfhandle(_fd(f))
+        overlapped = OVERLAPPED()
+        ret = UnlockFileEx(hfile, 0, 0, 0xFFFF0000, byref(overlapped))
+        return bool(ret)
+
+else:
+    try:
+        import fcntl
+
+        LOCK_SH = fcntl.LOCK_SH  # shared lock
+        LOCK_NB = fcntl.LOCK_NB  # non-blocking
+        LOCK_EX = fcntl.LOCK_EX
+    except (ImportError, AttributeError):
+        # File locking is not supported.
+        LOCK_EX = LOCK_SH = LOCK_NB = 0
+
+        # Dummy functions that don't do anything.
+        def lock(f, flags):
+            # File is not locked
+            return False
+
+        def unlock(f):
+            # File is unlocked
+            return True
+
+    else:
+
+        def lock(f, flags):
+            try:
+                fcntl.flock(_fd(f), flags)
+                return True
+            except BlockingIOError:
+                return False
+
+        def unlock(f):
+            fcntl.flock(_fd(f), fcntl.LOCK_UN)
+            return True

env/lib/python3.10/site-packages/django/core/files/move.py

@@ -0,0 +1,102 @@
+"""
+Move a file in the safest way possible::
+
+    >>> from django.core.files.move import file_move_safe
+    >>> file_move_safe("/tmp/old_file", "/tmp/new_file")
+"""
+
+import os
+from shutil import copymode, copystat
+
+from django.core.files import locks
+
+__all__ = ["file_move_safe"]
+
+
+def _samefile(src, dst):
+    # Macintosh, Unix.
+    if hasattr(os.path, "samefile"):
+        try:
+            return os.path.samefile(src, dst)
+        except OSError:
+            return False
+
+    # All other platforms: check for same pathname.
+    return os.path.normcase(os.path.abspath(src)) == os.path.normcase(
+        os.path.abspath(dst)
+    )
+
+
+def file_move_safe(
+    old_file_name, new_file_name, chunk_size=1024 * 64, allow_overwrite=False
+):
+    """
+    Move a file from one location to another in the safest way possible.
+
+    First, try ``os.rename``, which is simple but will break across filesystems.
+    If that fails, stream manually from one file to another in pure Python.
+
+    If the destination file exists and ``allow_overwrite`` is ``False``, raise
+    ``FileExistsError``.
+    """
+    # There's no reason to move if we don't have to.
+    if _samefile(old_file_name, new_file_name):
+        return
+
+    try:
+        if not allow_overwrite and os.access(new_file_name, os.F_OK):
+            raise FileExistsError(
+                "Destination file %s exists and allow_overwrite is False."
+                % new_file_name
+            )
+
+        os.rename(old_file_name, new_file_name)
+        return
+    except OSError:
+        # OSError happens with os.rename() if moving to another filesystem or
+        # when moving opened files on certain operating systems.
+        pass
+
+    # first open the old file, so that it won't go away
+    with open(old_file_name, "rb") as old_file:
+        # now open the new file, not forgetting allow_overwrite
+        fd = os.open(
+            new_file_name,
+            (
+                os.O_WRONLY
+                | os.O_CREAT
+                | getattr(os, "O_BINARY", 0)
+                | (os.O_EXCL if not allow_overwrite else 0)
+            ),
+        )
+        try:
+            locks.lock(fd, locks.LOCK_EX)
+            current_chunk = None
+            while current_chunk != b"":
+                current_chunk = old_file.read(chunk_size)
+                os.write(fd, current_chunk)
+        finally:
+            locks.unlock(fd)
+            os.close(fd)
+
+    try:
+        copystat(old_file_name, new_file_name)
+    except PermissionError:
+        # Certain filesystems (e.g. CIFS) fail to copy the file's metadata if
+        # the type of the destination filesystem isn't the same as the source
+        # filesystem. This also happens with some SELinux-enabled systems.
+        # Ignore that, but try to set basic permissions.
+        try:
+            copymode(old_file_name, new_file_name)
+        except PermissionError:
+            pass
+
+    try:
+        os.remove(old_file_name)
+    except PermissionError as e:
+        # Certain operating systems (Cygwin and Windows)
+        # fail when deleting opened files, ignore it.  (For the
+        # systems where this happens, temporary files will be auto-deleted
+        # on close anyway.)
+        if getattr(e, "winerror", 0) != 32:
+            raise

env/lib/python3.10/site-packages/django/core/files/storage/__init__.py

@@ -0,0 +1,46 @@
+import warnings
+
+from django.conf import DEFAULT_STORAGE_ALIAS, settings
+from django.utils.deprecation import RemovedInDjango51Warning
+from django.utils.functional import LazyObject
+from django.utils.module_loading import import_string
+
+from .base import Storage
+from .filesystem import FileSystemStorage
+from .handler import InvalidStorageError, StorageHandler
+from .memory import InMemoryStorage
+
+__all__ = (
+    "FileSystemStorage",
+    "InMemoryStorage",
+    "Storage",
+    "DefaultStorage",
+    "default_storage",
+    "get_storage_class",
+    "InvalidStorageError",
+    "StorageHandler",
+    "storages",
+)
+
+GET_STORAGE_CLASS_DEPRECATED_MSG = (
+    "django.core.files.storage.get_storage_class is deprecated in favor of "
+    "using django.core.files.storage.storages."
+)
+
+
+def get_storage_class(import_path=None):
+    warnings.warn(
+        GET_STORAGE_CLASS_DEPRECATED_MSG,
+        RemovedInDjango51Warning,
+        stacklevel=2,
+    )
+    return import_string(import_path or settings.DEFAULT_FILE_STORAGE)
+
+
+class DefaultStorage(LazyObject):
+    def _setup(self):
+        self._wrapped = storages[DEFAULT_STORAGE_ALIAS]
+
+
+storages = StorageHandler()
+default_storage = DefaultStorage()

env/lib/python3.10/site-packages/django/core/files/storage/base.py

@@ -0,0 +1,201 @@
+import os
+import pathlib
+
+from django.core.exceptions import SuspiciousFileOperation
+from django.core.files import File
+from django.core.files.utils import validate_file_name
+from django.utils.crypto import get_random_string
+from django.utils.text import get_valid_filename
+
+
+class Storage:
+    """
+    A base storage class, providing some default behaviors that all other
+    storage systems can inherit or override, as necessary.
+    """
+
+    # The following methods represent a public interface to private methods.
+    # These shouldn't be overridden by subclasses unless absolutely necessary.
+
+    def open(self, name, mode="rb"):
+        """Retrieve the specified file from storage."""
+        return self._open(name, mode)
+
+    def save(self, name, content, max_length=None):
+        """
+        Save new content to the file specified by name. The content should be
+        a proper File object or any Python file-like object, ready to be read
+        from the beginning.
+        """
+        # Get the proper name for the file, as it will actually be saved.
+        if name is None:
+            name = content.name
+
+        if not hasattr(content, "chunks"):
+            content = File(content, name)
+
+        # Ensure that the name is valid, before and after having the storage
+        # system potentially modifying the name. This duplicates the check made
+        # inside `get_available_name` but it's necessary for those cases where
+        # `get_available_name` is overriden and validation is lost.
+        validate_file_name(name, allow_relative_path=True)
+
+        # Potentially find a different name depending on storage constraints.
+        name = self.get_available_name(name, max_length=max_length)
+        # Validate the (potentially) new name.
+        validate_file_name(name, allow_relative_path=True)
+
+        # The save operation should return the actual name of the file saved.
+        name = self._save(name, content)
+        # Ensure that the name returned from the storage system is still valid.
+        validate_file_name(name, allow_relative_path=True)
+        return name
+
+    # These methods are part of the public API, with default implementations.
+
+    def get_valid_name(self, name):
+        """
+        Return a filename, based on the provided filename, that's suitable for
+        use in the target storage system.
+        """
+        return get_valid_filename(name)
+
+    def get_alternative_name(self, file_root, file_ext):
+        """
+        Return an alternative filename, by adding an underscore and a random 7
+        character alphanumeric string (before the file extension, if one
+        exists) to the filename.
+        """
+        return "%s_%s%s" % (file_root, get_random_string(7), file_ext)
+
+    def get_available_name(self, name, max_length=None):
+        """
+        Return a filename that's free on the target storage system and
+        available for new content to be written to.
+        """
+        name = str(name).replace("\\", "/")
+        dir_name, file_name = os.path.split(name)
+        if ".." in pathlib.PurePath(dir_name).parts:
+            raise SuspiciousFileOperation(
+                "Detected path traversal attempt in '%s'" % dir_name
+            )
+        validate_file_name(file_name)
+        file_root, file_ext = os.path.splitext(file_name)
+        # If the filename already exists, generate an alternative filename
+        # until it doesn't exist.
+        # Truncate original name if required, so the new filename does not
+        # exceed the max_length.
+        while self.exists(name) or (max_length and len(name) > max_length):
+            # file_ext includes the dot.
+            name = os.path.join(
+                dir_name, self.get_alternative_name(file_root, file_ext)
+            )
+            if max_length is None:
+                continue
+            # Truncate file_root if max_length exceeded.
+            truncation = len(name) - max_length
+            if truncation > 0:
+                file_root = file_root[:-truncation]
+                # Entire file_root was truncated in attempt to find an
+                # available filename.
+                if not file_root:
+                    raise SuspiciousFileOperation(
+                        'Storage can not find an available filename for "%s". '
+                        "Please make sure that the corresponding file field "
+                        'allows sufficient "max_length".' % name
+                    )
+                name = os.path.join(
+                    dir_name, self.get_alternative_name(file_root, file_ext)
+                )
+        return name
+
+    def generate_filename(self, filename):
+        """
+        Validate the filename by calling get_valid_name() and return a filename
+        to be passed to the save() method.
+        """
+        filename = str(filename).replace("\\", "/")
+        # `filename` may include a path as returned by FileField.upload_to.
+        dirname, filename = os.path.split(filename)
+        if ".." in pathlib.PurePath(dirname).parts:
+            raise SuspiciousFileOperation(
+                "Detected path traversal attempt in '%s'" % dirname
+            )
+        return os.path.normpath(os.path.join(dirname, self.get_valid_name(filename)))
+
+    def path(self, name):
+        """
+        Return a local filesystem path where the file can be retrieved using
+        Python's built-in open() function. Storage systems that can't be
+        accessed using open() should *not* implement this method.
+        """
+        raise NotImplementedError("This backend doesn't support absolute paths.")
+
+    # The following methods form the public API for storage systems, but with
+    # no default implementations. Subclasses must implement *all* of these.
+
+    def delete(self, name):
+        """
+        Delete the specified file from the storage system.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide a delete() method"
+        )
+
+    def exists(self, name):
+        """
+        Return True if a file referenced by the given name already exists in the
+        storage system, or False if the name is available for a new file.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide an exists() method"
+        )
+
+    def listdir(self, path):
+        """
+        List the contents of the specified path. Return a 2-tuple of lists:
+        the first item being directories, the second item being files.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide a listdir() method"
+        )
+
+    def size(self, name):
+        """
+        Return the total size, in bytes, of the file specified by name.
+        """
+        raise NotImplementedError("subclasses of Storage must provide a size() method")
+
+    def url(self, name):
+        """
+        Return an absolute URL where the file's contents can be accessed
+        directly by a web browser.
+        """
+        raise NotImplementedError("subclasses of Storage must provide a url() method")
+
+    def get_accessed_time(self, name):
+        """
+        Return the last accessed time (as a datetime) of the file specified by
+        name. The datetime will be timezone-aware if USE_TZ=True.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide a get_accessed_time() method"
+        )
+
+    def get_created_time(self, name):
+        """
+        Return the creation time (as a datetime) of the file specified by name.
+        The datetime will be timezone-aware if USE_TZ=True.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide a get_created_time() method"
+        )
+
+    def get_modified_time(self, name):
+        """
+        Return the last modified time (as a datetime) of the file specified by
+        name. The datetime will be timezone-aware if USE_TZ=True.
+        """
+        raise NotImplementedError(
+            "subclasses of Storage must provide a get_modified_time() method"
+        )

env/lib/python3.10/site-packages/django/core/files/storage/filesystem.py

@@ -0,0 +1,207 @@
+import os
+from datetime import datetime, timezone
+from urllib.parse import urljoin
+
+from django.conf import settings
+from django.core.files import File, locks
+from django.core.files.move import file_move_safe
+from django.core.signals import setting_changed
+from django.utils._os import safe_join
+from django.utils.deconstruct import deconstructible
+from django.utils.encoding import filepath_to_uri
+from django.utils.functional import cached_property
+
+from .base import Storage
+from .mixins import StorageSettingsMixin
+
+
+@deconstructible(path="django.core.files.storage.FileSystemStorage")
+class FileSystemStorage(Storage, StorageSettingsMixin):
+    """
+    Standard filesystem storage
+    """
+
+    # The combination of O_CREAT and O_EXCL makes os.open() raise OSError if
+    # the file already exists before it's opened.
+    OS_OPEN_FLAGS = os.O_WRONLY | os.O_CREAT | os.O_EXCL | getattr(os, "O_BINARY", 0)
+
+    def __init__(
+        self,
+        location=None,
+        base_url=None,
+        file_permissions_mode=None,
+        directory_permissions_mode=None,
+    ):
+        self._location = location
+        self._base_url = base_url
+        self._file_permissions_mode = file_permissions_mode
+        self._directory_permissions_mode = directory_permissions_mode
+        setting_changed.connect(self._clear_cached_properties)
+
+    @cached_property
+    def base_location(self):
+        return self._value_or_setting(self._location, settings.MEDIA_ROOT)
+
+    @cached_property
+    def location(self):
+        return os.path.abspath(self.base_location)
+
+    @cached_property
+    def base_url(self):
+        if self._base_url is not None and not self._base_url.endswith("/"):
+            self._base_url += "/"
+        return self._value_or_setting(self._base_url, settings.MEDIA_URL)
+
+    @cached_property
+    def file_permissions_mode(self):
+        return self._value_or_setting(
+            self._file_permissions_mode, settings.FILE_UPLOAD_PERMISSIONS
+        )
+
+    @cached_property
+    def directory_permissions_mode(self):
+        return self._value_or_setting(
+            self._directory_permissions_mode, settings.FILE_UPLOAD_DIRECTORY_PERMISSIONS
+        )
+
+    def _open(self, name, mode="rb"):
+        return File(open(self.path(name), mode))
+
+    def _save(self, name, content):
+        full_path = self.path(name)
+
+        # Create any intermediate directories that do not exist.
+        directory = os.path.dirname(full_path)
+        try:
+            if self.directory_permissions_mode is not None:
+                # Set the umask because os.makedirs() doesn't apply the "mode"
+                # argument to intermediate-level directories.
+                old_umask = os.umask(0o777 & ~self.directory_permissions_mode)
+                try:
+                    os.makedirs(
+                        directory, self.directory_permissions_mode, exist_ok=True
+                    )
+                finally:
+                    os.umask(old_umask)
+            else:
+                os.makedirs(directory, exist_ok=True)
+        except FileExistsError:
+            raise FileExistsError("%s exists and is not a directory." % directory)
+
+        # There's a potential race condition between get_available_name and
+        # saving the file; it's possible that two threads might return the
+        # same name, at which point all sorts of fun happens. So we need to
+        # try to create the file, but if it already exists we have to go back
+        # to get_available_name() and try again.
+
+        while True:
+            try:
+                # This file has a file path that we can move.
+                if hasattr(content, "temporary_file_path"):
+                    file_move_safe(content.temporary_file_path(), full_path)
+
+                # This is a normal uploadedfile that we can stream.
+                else:
+                    # The current umask value is masked out by os.open!
+                    fd = os.open(full_path, self.OS_OPEN_FLAGS, 0o666)
+                    _file = None
+                    try:
+                        locks.lock(fd, locks.LOCK_EX)
+                        for chunk in content.chunks():
+                            if _file is None:
+                                mode = "wb" if isinstance(chunk, bytes) else "wt"
+                                _file = os.fdopen(fd, mode)
+                            _file.write(chunk)
+                    finally:
+                        locks.unlock(fd)
+                        if _file is not None:
+                            _file.close()
+                        else:
+                            os.close(fd)
+            except FileExistsError:
+                # A new name is needed if the file exists.
+                name = self.get_available_name(name)
+                full_path = self.path(name)
+            else:
+                # OK, the file save worked. Break out of the loop.
+                break
+
+        if self.file_permissions_mode is not None:
+            os.chmod(full_path, self.file_permissions_mode)
+
+        # Ensure the saved path is always relative to the storage root.
+        name = os.path.relpath(full_path, self.location)
+        # Ensure the moved file has the same gid as the storage root.
+        self._ensure_location_group_id(full_path)
+        # Store filenames with forward slashes, even on Windows.
+        return str(name).replace("\\", "/")
+
+    def _ensure_location_group_id(self, full_path):
+        if os.name == "posix":
+            file_gid = os.stat(full_path).st_gid
+            location_gid = os.stat(self.location).st_gid
+            if file_gid != location_gid:
+                try:
+                    os.chown(full_path, uid=-1, gid=location_gid)
+                except PermissionError:
+                    pass
+
+    def delete(self, name):
+        if not name:
+            raise ValueError("The name must be given to delete().")
+        name = self.path(name)
+        # If the file or directory exists, delete it from the filesystem.
+        try:
+            if os.path.isdir(name):
+                os.rmdir(name)
+            else:
+                os.remove(name)
+        except FileNotFoundError:
+            # FileNotFoundError is raised if the file or directory was removed
+            # concurrently.
+            pass
+
+    def exists(self, name):
+        return os.path.lexists(self.path(name))
+
+    def listdir(self, path):
+        path = self.path(path)
+        directories, files = [], []
+        with os.scandir(path) as entries:
+            for entry in entries:
+                if entry.is_dir():
+                    directories.append(entry.name)
+                else:
+                    files.append(entry.name)
+        return directories, files
+
+    def path(self, name):
+        return safe_join(self.location, name)
+
+    def size(self, name):
+        return os.path.getsize(self.path(name))
+
+    def url(self, name):
+        if self.base_url is None:
+            raise ValueError("This file is not accessible via a URL.")
+        url = filepath_to_uri(name)
+        if url is not None:
+            url = url.lstrip("/")
+        return urljoin(self.base_url, url)
+
+    def _datetime_from_timestamp(self, ts):
+        """
+        If timezone support is enabled, make an aware datetime object in UTC;
+        otherwise make a naive one in the local timezone.
+        """
+        tz = timezone.utc if settings.USE_TZ else None
+        return datetime.fromtimestamp(ts, tz=tz)
+
+    def get_accessed_time(self, name):
+        return self._datetime_from_timestamp(os.path.getatime(self.path(name)))
+
+    def get_created_time(self, name):
+        return self._datetime_from_timestamp(os.path.getctime(self.path(name)))
+
+    def get_modified_time(self, name):
+        return self._datetime_from_timestamp(os.path.getmtime(self.path(name)))

env/lib/python3.10/site-packages/django/core/files/storage/handler.py

@@ -0,0 +1,55 @@
+from django.conf import DEFAULT_STORAGE_ALIAS, STATICFILES_STORAGE_ALIAS, settings
+from django.core.exceptions import ImproperlyConfigured
+from django.utils.functional import cached_property
+from django.utils.module_loading import import_string
+
+
+class InvalidStorageError(ImproperlyConfigured):
+    pass
+
+
+class StorageHandler:
+    def __init__(self, backends=None):
+        # backends is an optional dict of storage backend definitions
+        # (structured like settings.STORAGES).
+        self._backends = backends
+        self._storages = {}
+
+    @cached_property
+    def backends(self):
+        if self._backends is None:
+            self._backends = settings.STORAGES.copy()
+            # RemovedInDjango51Warning.
+            if settings.is_overridden("DEFAULT_FILE_STORAGE"):
+                self._backends[DEFAULT_STORAGE_ALIAS] = {
+                    "BACKEND": settings.DEFAULT_FILE_STORAGE
+                }
+            if settings.is_overridden("STATICFILES_STORAGE"):
+                self._backends[STATICFILES_STORAGE_ALIAS] = {
+                    "BACKEND": settings.STATICFILES_STORAGE
+                }
+        return self._backends
+
+    def __getitem__(self, alias):
+        try:
+            return self._storages[alias]
+        except KeyError:
+            try:
+                params = self.backends[alias]
+            except KeyError:
+                raise InvalidStorageError(
+                    f"Could not find config for '{alias}' in settings.STORAGES."
+                )
+            storage = self.create_storage(params)
+            self._storages[alias] = storage
+            return storage
+
+    def create_storage(self, params):
+        params = params.copy()
+        backend = params.pop("BACKEND")
+        options = params.pop("OPTIONS", {})
+        try:
+            storage_cls = import_string(backend)
+        except ImportError as e:
+            raise InvalidStorageError(f"Could not find backend {backend!r}: {e}") from e
+        return storage_cls(**options)

env/lib/python3.10/site-packages/django/core/files/storage/memory.py

@@ -0,0 +1,290 @@
+"""
+Based on dj-inmemorystorage (BSD) by Cody Soyland, Seán Hayes, Tore Birkeland,
+and Nick Presta.
+"""
+
+import errno
+import io
+import os
+import pathlib
+from urllib.parse import urljoin
+
+from django.conf import settings
+from django.core.files.base import ContentFile
+from django.core.signals import setting_changed
+from django.utils._os import safe_join
+from django.utils.deconstruct import deconstructible
+from django.utils.encoding import filepath_to_uri
+from django.utils.functional import cached_property
+from django.utils.timezone import now
+
+from .base import Storage
+from .mixins import StorageSettingsMixin
+
+__all__ = ("InMemoryStorage",)
+
+
+class TimingMixin:
+    def _initialize_times(self):
+        self.created_time = now()
+        self.accessed_time = self.created_time
+        self.modified_time = self.created_time
+
+    def _update_accessed_time(self):
+        self.accessed_time = now()
+
+    def _update_modified_time(self):
+        self.modified_time = now()
+
+
+class InMemoryFileNode(ContentFile, TimingMixin):
+    """
+    Helper class representing an in-memory file node.
+
+    Handle unicode/bytes conversion during I/O operations and record creation,
+    modification, and access times.
+    """
+
+    def __init__(self, content="", name=""):
+        self.file = None
+        self._content_type = type(content)
+        self._initialize_stream()
+        self._initialize_times()
+
+    def open(self, mode):
+        self._convert_stream_content(mode)
+        self._update_accessed_time()
+        return super().open(mode)
+
+    def write(self, data):
+        super().write(data)
+        self._update_modified_time()
+
+    def _initialize_stream(self):
+        """Initialize underlying stream according to the content type."""
+        self.file = io.BytesIO() if self._content_type == bytes else io.StringIO()
+
+    def _convert_stream_content(self, mode):
+        """Convert actual file content according to the opening mode."""
+        new_content_type = bytes if "b" in mode else str
+        # No conversion needed.
+        if self._content_type == new_content_type:
+            return
+
+        content = self.file.getvalue()
+        content = content.encode() if isinstance(content, str) else content.decode()
+        self._content_type = new_content_type
+        self._initialize_stream()
+
+        self.file.write(content)
+
+
+class InMemoryDirNode(TimingMixin):
+    """
+    Helper class representing an in-memory directory node.
+
+    Handle path navigation of directory trees, creating missing nodes if
+    needed.
+    """
+
+    def __init__(self):
+        self._children = {}
+        self._initialize_times()
+
+    def resolve(self, path, create_if_missing=False, leaf_cls=None, check_exists=True):
+        """
+        Navigate current directory tree, returning node matching path or
+        creating a new one, if missing.
+        - path: path of the node to search
+        - create_if_missing: create nodes if not exist. Defaults to False.
+        - leaf_cls: expected type of leaf node. Defaults to None.
+        - check_exists: if True and the leaf node does not exist, raise a
+          FileNotFoundError. Defaults to True.
+        """
+        path_segments = list(pathlib.Path(path).parts)
+        current_node = self
+
+        while path_segments:
+            path_segment = path_segments.pop(0)
+            # If current node is a file node and there are unprocessed
+            # segments, raise an error.
+            if isinstance(current_node, InMemoryFileNode):
+                path_segments = os.path.split(path)
+                current_path = "/".join(
+                    path_segments[: path_segments.index(path_segment)]
+                )
+                raise NotADirectoryError(
+                    errno.ENOTDIR, os.strerror(errno.ENOTDIR), current_path
+                )
+            current_node = current_node._resolve_child(
+                path_segment,
+                create_if_missing,
+                leaf_cls if len(path_segments) == 0 else InMemoryDirNode,
+            )
+            if current_node is None:
+                break
+
+        if current_node is None and check_exists:
+            raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), path)
+
+        # If a leaf_cls is not None, check if leaf node is of right type.
+        if leaf_cls and not isinstance(current_node, leaf_cls):
+            error_cls, error_code = (
+                (NotADirectoryError, errno.ENOTDIR)
+                if leaf_cls is InMemoryDirNode
+                else (IsADirectoryError, errno.EISDIR)
+            )
+            raise error_cls(error_code, os.strerror(error_code), path)
+
+        return current_node
+
+    def _resolve_child(self, path_segment, create_if_missing, child_cls):
+        if create_if_missing:
+            self._update_accessed_time()
+            self._update_modified_time()
+            return self._children.setdefault(path_segment, child_cls())
+        return self._children.get(path_segment)
+
+    def listdir(self):
+        directories, files = [], []
+        for name, entry in self._children.items():
+            if isinstance(entry, InMemoryDirNode):
+                directories.append(name)
+            else:
+                files.append(name)
+        return directories, files
+
+    def remove_child(self, name):
+        if name in self._children:
+            self._update_accessed_time()
+            self._update_modified_time()
+            del self._children[name]
+
+
+@deconstructible(path="django.core.files.storage.InMemoryStorage")
+class InMemoryStorage(Storage, StorageSettingsMixin):
+    """A storage saving files in memory."""
+
+    def __init__(
+        self,
+        location=None,
+        base_url=None,
+        file_permissions_mode=None,
+        directory_permissions_mode=None,
+    ):
+        self._location = location
+        self._base_url = base_url
+        self._file_permissions_mode = file_permissions_mode
+        self._directory_permissions_mode = directory_permissions_mode
+        self._root = InMemoryDirNode()
+        self._resolve(
+            self.base_location, create_if_missing=True, leaf_cls=InMemoryDirNode
+        )
+        setting_changed.connect(self._clear_cached_properties)
+
+    @cached_property
+    def base_location(self):
+        return self._value_or_setting(self._location, settings.MEDIA_ROOT)
+
+    @cached_property
+    def location(self):
+        return os.path.abspath(self.base_location)
+
+    @cached_property
+    def base_url(self):
+        if self._base_url is not None and not self._base_url.endswith("/"):
+            self._base_url += "/"
+        return self._value_or_setting(self._base_url, settings.MEDIA_URL)
+
+    @cached_property
+    def file_permissions_mode(self):
+        return self._value_or_setting(
+            self._file_permissions_mode, settings.FILE_UPLOAD_PERMISSIONS
+        )
+
+    @cached_property
+    def directory_permissions_mode(self):
+        return self._value_or_setting(
+            self._directory_permissions_mode, settings.FILE_UPLOAD_DIRECTORY_PERMISSIONS
+        )
+
+    def _relative_path(self, name):
+        full_path = self.path(name)
+        return os.path.relpath(full_path, self.location)
+
+    def _resolve(self, name, create_if_missing=False, leaf_cls=None, check_exists=True):
+        try:
+            relative_path = self._relative_path(name)
+            return self._root.resolve(
+                relative_path,
+                create_if_missing=create_if_missing,
+                leaf_cls=leaf_cls,
+                check_exists=check_exists,
+            )
+        except NotADirectoryError as exc:
+            absolute_path = self.path(exc.filename)
+            raise FileExistsError(f"{absolute_path} exists and is not a directory.")
+
+    def _open(self, name, mode="rb"):
+        create_if_missing = "w" in mode
+        file_node = self._resolve(
+            name, create_if_missing=create_if_missing, leaf_cls=InMemoryFileNode
+        )
+        return file_node.open(mode)
+
+    def _save(self, name, content):
+        file_node = self._resolve(
+            name, create_if_missing=True, leaf_cls=InMemoryFileNode
+        )
+        fd = None
+        for chunk in content.chunks():
+            if fd is None:
+                mode = "wb" if isinstance(chunk, bytes) else "wt"
+                fd = file_node.open(mode)
+            fd.write(chunk)
+
+        if hasattr(content, "temporary_file_path"):
+            os.remove(content.temporary_file_path())
+
+        file_node.modified_time = now()
+        return self._relative_path(name).replace("\\", "/")
+
+    def path(self, name):
+        return safe_join(self.location, name)
+
+    def delete(self, name):
+        path, filename = os.path.split(name)
+        dir_node = self._resolve(path, check_exists=False)
+        if dir_node is None:
+            return None
+        dir_node.remove_child(filename)
+
+    def exists(self, name):
+        return self._resolve(name, check_exists=False) is not None
+
+    def listdir(self, path):
+        node = self._resolve(path, leaf_cls=InMemoryDirNode)
+        return node.listdir()
+
+    def size(self, name):
+        return len(self._open(name, "rb").file.getvalue())
+
+    def url(self, name):
+        if self.base_url is None:
+            raise ValueError("This file is not accessible via a URL.")
+        url = filepath_to_uri(name)
+        if url is not None:
+            url = url.lstrip("/")
+        return urljoin(self.base_url, url)
+
+    def get_accessed_time(self, name):
+        file_node = self._resolve(name)
+        return file_node.accessed_time
+
+    def get_created_time(self, name):
+        file_node = self._resolve(name)
+        return file_node.created_time
+
+    def get_modified_time(self, name):
+        file_node = self._resolve(name)
+        return file_node.modified_time

env/lib/python3.10/site-packages/django/core/files/storage/mixins.py

@@ -0,0 +1,15 @@
+class StorageSettingsMixin:
+    def _clear_cached_properties(self, setting, **kwargs):
+        """Reset setting based property values."""
+        if setting == "MEDIA_ROOT":
+            self.__dict__.pop("base_location", None)
+            self.__dict__.pop("location", None)
+        elif setting == "MEDIA_URL":
+            self.__dict__.pop("base_url", None)
+        elif setting == "FILE_UPLOAD_PERMISSIONS":
+            self.__dict__.pop("file_permissions_mode", None)
+        elif setting == "FILE_UPLOAD_DIRECTORY_PERMISSIONS":
+            self.__dict__.pop("directory_permissions_mode", None)
+
+    def _value_or_setting(self, value, setting):
+        return setting if value is None else value

env/lib/python3.10/site-packages/django/core/files/temp.py

@@ -0,0 +1,79 @@
+"""
+The temp module provides a NamedTemporaryFile that can be reopened in the same
+process on any platform. Most platforms use the standard Python
+tempfile.NamedTemporaryFile class, but Windows users are given a custom class.
+
+This is needed because the Python implementation of NamedTemporaryFile uses the
+O_TEMPORARY flag under Windows, which prevents the file from being reopened
+if the same flag is not provided [1][2]. Note that this does not address the
+more general issue of opening a file for writing and reading in multiple
+processes in a manner that works across platforms.
+
+The custom version of NamedTemporaryFile doesn't support the same keyword
+arguments available in tempfile.NamedTemporaryFile.
+
+1: https://mail.python.org/pipermail/python-list/2005-December/336957.html
+2: https://bugs.python.org/issue14243
+"""
+
+import os
+import tempfile
+
+from django.core.files.utils import FileProxyMixin
+
+__all__ = (
+    "NamedTemporaryFile",
+    "gettempdir",
+)
+
+
+if os.name == "nt":
+
+    class TemporaryFile(FileProxyMixin):
+        """
+        Temporary file object constructor that supports reopening of the
+        temporary file in Windows.
+
+        Unlike tempfile.NamedTemporaryFile from the standard library,
+        __init__() doesn't support the 'delete', 'buffering', 'encoding', or
+        'newline' keyword arguments.
+        """
+
+        def __init__(self, mode="w+b", bufsize=-1, suffix="", prefix="", dir=None):
+            fd, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, dir=dir)
+            self.name = name
+            self.file = os.fdopen(fd, mode, bufsize)
+            self.close_called = False
+
+        # Because close can be called during shutdown
+        # we need to cache os.unlink and access it
+        # as self.unlink only
+        unlink = os.unlink
+
+        def close(self):
+            if not self.close_called:
+                self.close_called = True
+                try:
+                    self.file.close()
+                except OSError:
+                    pass
+                try:
+                    self.unlink(self.name)
+                except OSError:
+                    pass
+
+        def __del__(self):
+            self.close()
+
+        def __enter__(self):
+            self.file.__enter__()
+            return self
+
+        def __exit__(self, exc, value, tb):
+            self.file.__exit__(exc, value, tb)
+
+    NamedTemporaryFile = TemporaryFile
+else:
+    NamedTemporaryFile = tempfile.NamedTemporaryFile
+
+gettempdir = tempfile.gettempdir

env/lib/python3.10/site-packages/django/core/files/uploadedfile.py

@@ -0,0 +1,150 @@
+"""
+Classes representing uploaded files.
+"""
+
+import os
+from io import BytesIO
+
+from django.conf import settings
+from django.core.files import temp as tempfile
+from django.core.files.base import File
+from django.core.files.utils import validate_file_name
+
+__all__ = (
+    "UploadedFile",
+    "TemporaryUploadedFile",
+    "InMemoryUploadedFile",
+    "SimpleUploadedFile",
+)
+
+
+class UploadedFile(File):
+    """
+    An abstract uploaded file (``TemporaryUploadedFile`` and
+    ``InMemoryUploadedFile`` are the built-in concrete subclasses).
+
+    An ``UploadedFile`` object behaves somewhat like a file object and
+    represents some file data that the user submitted with a form.
+    """
+
+    def __init__(
+        self,
+        file=None,
+        name=None,
+        content_type=None,
+        size=None,
+        charset=None,
+        content_type_extra=None,
+    ):
+        super().__init__(file, name)
+        self.size = size
+        self.content_type = content_type
+        self.charset = charset
+        self.content_type_extra = content_type_extra
+
+    def __repr__(self):
+        return "<%s: %s (%s)>" % (self.__class__.__name__, self.name, self.content_type)
+
+    def _get_name(self):
+        return self._name
+
+    def _set_name(self, name):
+        # Sanitize the file name so that it can't be dangerous.
+        if name is not None:
+            # Just use the basename of the file -- anything else is dangerous.
+            name = os.path.basename(name)
+
+            # File names longer than 255 characters can cause problems on older OSes.
+            if len(name) > 255:
+                name, ext = os.path.splitext(name)
+                ext = ext[:255]
+                name = name[: 255 - len(ext)] + ext
+
+            name = validate_file_name(name)
+
+        self._name = name
+
+    name = property(_get_name, _set_name)
+
+
+class TemporaryUploadedFile(UploadedFile):
+    """
+    A file uploaded to a temporary location (i.e. stream-to-disk).
+    """
+
+    def __init__(self, name, content_type, size, charset, content_type_extra=None):
+        _, ext = os.path.splitext(name)
+        file = tempfile.NamedTemporaryFile(
+            suffix=".upload" + ext, dir=settings.FILE_UPLOAD_TEMP_DIR
+        )
+        super().__init__(file, name, content_type, size, charset, content_type_extra)
+
+    def temporary_file_path(self):
+        """Return the full path of this file."""
+        return self.file.name
+
+    def close(self):
+        try:
+            return self.file.close()
+        except FileNotFoundError:
+            # The file was moved or deleted before the tempfile could unlink
+            # it. Still sets self.file.close_called and calls
+            # self.file.file.close() before the exception.
+            pass
+
+
+class InMemoryUploadedFile(UploadedFile):
+    """
+    A file uploaded into memory (i.e. stream-to-memory).
+    """
+
+    def __init__(
+        self,
+        file,
+        field_name,
+        name,
+        content_type,
+        size,
+        charset,
+        content_type_extra=None,
+    ):
+        super().__init__(file, name, content_type, size, charset, content_type_extra)
+        self.field_name = field_name
+
+    def open(self, mode=None):
+        self.file.seek(0)
+        return self
+
+    def chunks(self, chunk_size=None):
+        self.file.seek(0)
+        yield self.read()
+
+    def multiple_chunks(self, chunk_size=None):
+        # Since it's in memory, we'll never have multiple chunks.
+        return False
+
+
+class SimpleUploadedFile(InMemoryUploadedFile):
+    """
+    A simple representation of a file, which just has content, size, and a name.
+    """
+
+    def __init__(self, name, content, content_type="text/plain"):
+        content = content or b""
+        super().__init__(
+            BytesIO(content), None, name, content_type, len(content), None, None
+        )
+
+    @classmethod
+    def from_dict(cls, file_dict):
+        """
+        Create a SimpleUploadedFile object from a dictionary with keys:
+           - filename
+           - content-type
+           - content
+        """
+        return cls(
+            file_dict["filename"],
+            file_dict["content"],
+            file_dict.get("content-type", "text/plain"),
+        )

env/lib/python3.10/site-packages/django/core/files/uploadhandler.py

@@ -0,0 +1,252 @@
+"""
+Base file upload handler classes, and the built-in concrete subclasses
+"""
+
+import os
+from io import BytesIO
+
+from django.conf import settings
+from django.core.files.uploadedfile import InMemoryUploadedFile, TemporaryUploadedFile
+from django.utils.module_loading import import_string
+
+__all__ = [
+    "UploadFileException",
+    "StopUpload",
+    "SkipFile",
+    "FileUploadHandler",
+    "TemporaryFileUploadHandler",
+    "MemoryFileUploadHandler",
+    "load_handler",
+    "StopFutureHandlers",
+]
+
+
+class UploadFileException(Exception):
+    """
+    Any error having to do with uploading files.
+    """
+
+    pass
+
+
+class StopUpload(UploadFileException):
+    """
+    This exception is raised when an upload must abort.
+    """
+
+    def __init__(self, connection_reset=False):
+        """
+        If ``connection_reset`` is ``True``, Django knows will halt the upload
+        without consuming the rest of the upload. This will cause the browser to
+        show a "connection reset" error.
+        """
+        self.connection_reset = connection_reset
+
+    def __str__(self):
+        if self.connection_reset:
+            return "StopUpload: Halt current upload."
+        else:
+            return "StopUpload: Consume request data, then halt."
+
+
+class SkipFile(UploadFileException):
+    """
+    This exception is raised by an upload handler that wants to skip a given file.
+    """
+
+    pass
+
+
+class StopFutureHandlers(UploadFileException):
+    """
+    Upload handlers that have handled a file and do not want future handlers to
+    run should raise this exception instead of returning None.
+    """
+
+    pass
+
+
+class FileUploadHandler:
+    """
+    Base class for streaming upload handlers.
+    """
+
+    chunk_size = 64 * 2**10  # : The default chunk size is 64 KB.
+
+    def __init__(self, request=None):
+        self.file_name = None
+        self.content_type = None
+        self.content_length = None
+        self.charset = None
+        self.content_type_extra = None
+        self.request = request
+
+    def handle_raw_input(
+        self, input_data, META, content_length, boundary, encoding=None
+    ):
+        """
+        Handle the raw input from the client.
+
+        Parameters:
+
+            :input_data:
+                An object that supports reading via .read().
+            :META:
+                ``request.META``.
+            :content_length:
+                The (integer) value of the Content-Length header from the
+                client.
+            :boundary: The boundary from the Content-Type header. Be sure to
+                prepend two '--'.
+        """
+        pass
+
+    def new_file(
+        self,
+        field_name,
+        file_name,
+        content_type,
+        content_length,
+        charset=None,
+        content_type_extra=None,
+    ):
+        """
+        Signal that a new file has been started.
+
+        Warning: As with any data from the client, you should not trust
+        content_length (and sometimes won't even get it).
+        """
+        self.field_name = field_name
+        self.file_name = file_name
+        self.content_type = content_type
+        self.content_length = content_length
+        self.charset = charset
+        self.content_type_extra = content_type_extra
+
+    def receive_data_chunk(self, raw_data, start):
+        """
+        Receive data from the streamed upload parser. ``start`` is the position
+        in the file of the chunk.
+        """
+        raise NotImplementedError(
+            "subclasses of FileUploadHandler must provide a receive_data_chunk() method"
+        )
+
+    def file_complete(self, file_size):
+        """
+        Signal that a file has completed. File size corresponds to the actual
+        size accumulated by all the chunks.
+
+        Subclasses should return a valid ``UploadedFile`` object.
+        """
+        raise NotImplementedError(
+            "subclasses of FileUploadHandler must provide a file_complete() method"
+        )
+
+    def upload_complete(self):
+        """
+        Signal that the upload is complete. Subclasses should perform cleanup
+        that is necessary for this handler.
+        """
+        pass
+
+    def upload_interrupted(self):
+        """
+        Signal that the upload was interrupted. Subclasses should perform
+        cleanup that is necessary for this handler.
+        """
+        pass
+
+
+class TemporaryFileUploadHandler(FileUploadHandler):
+    """
+    Upload handler that streams data into a temporary file.
+    """
+
+    def new_file(self, *args, **kwargs):
+        """
+        Create the file object to append to as data is coming in.
+        """
+        super().new_file(*args, **kwargs)
+        self.file = TemporaryUploadedFile(
+            self.file_name, self.content_type, 0, self.charset, self.content_type_extra
+        )
+
+    def receive_data_chunk(self, raw_data, start):
+        self.file.write(raw_data)
+
+    def file_complete(self, file_size):
+        self.file.seek(0)
+        self.file.size = file_size
+        return self.file
+
+    def upload_interrupted(self):
+        if hasattr(self, "file"):
+            temp_location = self.file.temporary_file_path()
+            try:
+                self.file.close()
+                os.remove(temp_location)
+            except FileNotFoundError:
+                pass
+
+
+class MemoryFileUploadHandler(FileUploadHandler):
+    """
+    File upload handler to stream uploads into memory (used for small files).
+    """
+
+    def handle_raw_input(
+        self, input_data, META, content_length, boundary, encoding=None
+    ):
+        """
+        Use the content_length to signal whether or not this handler should be
+        used.
+        """
+        # Check the content-length header to see if we should
+        # If the post is too large, we cannot use the Memory handler.
+        self.activated = content_length <= settings.FILE_UPLOAD_MAX_MEMORY_SIZE
+
+    def new_file(self, *args, **kwargs):
+        super().new_file(*args, **kwargs)
+        if self.activated:
+            self.file = BytesIO()
+            raise StopFutureHandlers()
+
+    def receive_data_chunk(self, raw_data, start):
+        """Add the data to the BytesIO file."""
+        if self.activated:
+            self.file.write(raw_data)
+        else:
+            return raw_data
+
+    def file_complete(self, file_size):
+        """Return a file object if this handler is activated."""
+        if not self.activated:
+            return
+
+        self.file.seek(0)
+        return InMemoryUploadedFile(
+            file=self.file,
+            field_name=self.field_name,
+            name=self.file_name,
+            content_type=self.content_type,
+            size=file_size,
+            charset=self.charset,
+            content_type_extra=self.content_type_extra,
+        )
+
+
+def load_handler(path, *args, **kwargs):
+    """
+    Given a path to a handler, return an instance of that handler.
+
+    E.g.::
+        >>> from django.http import HttpRequest
+        >>> request = HttpRequest()
+        >>> load_handler(
+        ...     'django.core.files.uploadhandler.TemporaryFileUploadHandler',
+        ...     request,
+        ... )
+        <TemporaryFileUploadHandler object at 0x...>
+    """
+    return import_string(path)(*args, **kwargs)

env/lib/python3.10/site-packages/django/core/files/utils.py

@@ -0,0 +1,77 @@
+import os
+import pathlib
+
+from django.core.exceptions import SuspiciousFileOperation
+
+
+def validate_file_name(name, allow_relative_path=False):
+    # Remove potentially dangerous names
+    if os.path.basename(name) in {"", ".", ".."}:
+        raise SuspiciousFileOperation("Could not derive file name from '%s'" % name)
+
+    if allow_relative_path:
+        # Ensure that name can be treated as a pure posix path, i.e. Unix
+        # style (with forward slashes).
+        path = pathlib.PurePosixPath(str(name).replace("\\", "/"))
+        if path.is_absolute() or ".." in path.parts:
+            raise SuspiciousFileOperation(
+                "Detected path traversal attempt in '%s'" % name
+            )
+    elif name != os.path.basename(name):
+        raise SuspiciousFileOperation("File name '%s' includes path elements" % name)
+
+    return name
+
+
+class FileProxyMixin:
+    """
+    A mixin class used to forward file methods to an underlying file
+    object.  The internal file object has to be called "file"::
+
+        class FileProxy(FileProxyMixin):
+            def __init__(self, file):
+                self.file = file
+    """
+
+    encoding = property(lambda self: self.file.encoding)
+    fileno = property(lambda self: self.file.fileno)
+    flush = property(lambda self: self.file.flush)
+    isatty = property(lambda self: self.file.isatty)
+    newlines = property(lambda self: self.file.newlines)
+    read = property(lambda self: self.file.read)
+    readinto = property(lambda self: self.file.readinto)
+    readline = property(lambda self: self.file.readline)
+    readlines = property(lambda self: self.file.readlines)
+    seek = property(lambda self: self.file.seek)
+    tell = property(lambda self: self.file.tell)
+    truncate = property(lambda self: self.file.truncate)
+    write = property(lambda self: self.file.write)
+    writelines = property(lambda self: self.file.writelines)
+
+    @property
+    def closed(self):
+        return not self.file or self.file.closed
+
+    def readable(self):
+        if self.closed:
+            return False
+        if hasattr(self.file, "readable"):
+            return self.file.readable()
+        return True
+
+    def writable(self):
+        if self.closed:
+            return False
+        if hasattr(self.file, "writable"):
+            return self.file.writable()
+        return "w" in getattr(self.file, "mode", "")
+
+    def seekable(self):
+        if self.closed:
+            return False
+        if hasattr(self.file, "seekable"):
+            return self.file.seekable()
+        return True
+
+    def __iter__(self):
+        return iter(self.file)