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kitabcitab/node_modules/next/dist/esm/server/api-utils/node.js

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+import { checkIsManualRevalidate, PRERENDER_REVALIDATE_ONLY_GENERATED_HEADER } from ".";
+import bytes from "next/dist/compiled/bytes";
+import { generateETag } from "../lib/etag";
+import { sendEtagResponse } from "../send-payload";
+import { Stream } from "stream";
+import { parse } from "next/dist/compiled/content-type";
+import isError from "../../lib/is-error";
+import { isResSent } from "../../shared/lib/utils";
+import { interopDefault } from "../../lib/interop-default";
+import { getCookieParser, setLazyProp, sendStatusCode, redirect, clearPreviewData, sendError, ApiError, PRERENDER_REVALIDATE_HEADER, COOKIE_NAME_PRERENDER_BYPASS, COOKIE_NAME_PRERENDER_DATA, SYMBOL_PREVIEW_DATA, RESPONSE_LIMIT_DEFAULT } from "./index";
+import { mockRequest } from "../lib/mock-request";
+export function tryGetPreviewData(req, res, options) {
+    // if an On-Demand revalidation is being done preview mode
+    // is disabled
+    if (options && checkIsManualRevalidate(req, options).isManualRevalidate) {
+        return false;
+    }
+    // Read cached preview data if present
+    if (SYMBOL_PREVIEW_DATA in req) {
+        return req[SYMBOL_PREVIEW_DATA];
+    }
+    const getCookies = getCookieParser(req.headers);
+    let cookies;
+    try {
+        cookies = getCookies();
+    } catch  {
+        // TODO: warn
+        return false;
+    }
+    const hasBypass = COOKIE_NAME_PRERENDER_BYPASS in cookies;
+    const hasData = COOKIE_NAME_PRERENDER_DATA in cookies;
+    // Case: neither cookie is set.
+    if (!(hasBypass || hasData)) {
+        return false;
+    }
+    // Case: one cookie is set, but not the other.
+    if (hasBypass !== hasData) {
+        clearPreviewData(res);
+        return false;
+    }
+    // Case: preview session is for an old build.
+    if (cookies[COOKIE_NAME_PRERENDER_BYPASS] !== options.previewModeId) {
+        clearPreviewData(res);
+        return false;
+    }
+    const tokenPreviewData = cookies[COOKIE_NAME_PRERENDER_DATA];
+    let encryptedPreviewData;
+    try {
+        const jsonwebtoken = require("next/dist/compiled/jsonwebtoken");
+        encryptedPreviewData = jsonwebtoken.verify(tokenPreviewData, options.previewModeSigningKey);
+    } catch  {
+        // TODO: warn
+        clearPreviewData(res);
+        return false;
+    }
+    const { decryptWithSecret  } = require("../crypto-utils");
+    const decryptedPreviewData = decryptWithSecret(Buffer.from(options.previewModeEncryptionKey), encryptedPreviewData.data);
+    try {
+        // TODO: strict runtime type checking
+        const data = JSON.parse(decryptedPreviewData);
+        // Cache lookup
+        Object.defineProperty(req, SYMBOL_PREVIEW_DATA, {
+            value: data,
+            enumerable: false
+        });
+        return data;
+    } catch  {
+        return false;
+    }
+}
+/**
+ * Parse `JSON` and handles invalid `JSON` strings
+ * @param str `JSON` string
+ */ function parseJson(str) {
+    if (str.length === 0) {
+        // special-case empty json body, as it's a common client-side mistake
+        return {};
+    }
+    try {
+        return JSON.parse(str);
+    } catch (e) {
+        throw new ApiError(400, "Invalid JSON");
+    }
+}
+/**
+ * Parse incoming message like `json` or `urlencoded`
+ * @param req request object
+ */ export async function parseBody(req, limit) {
+    let contentType;
+    try {
+        contentType = parse(req.headers["content-type"] || "text/plain");
+    } catch  {
+        contentType = parse("text/plain");
+    }
+    const { type , parameters  } = contentType;
+    const encoding = parameters.charset || "utf-8";
+    let buffer;
+    try {
+        const getRawBody = require("next/dist/compiled/raw-body");
+        buffer = await getRawBody(req, {
+            encoding,
+            limit
+        });
+    } catch (e) {
+        if (isError(e) && e.type === "entity.too.large") {
+            throw new ApiError(413, `Body exceeded ${limit} limit`);
+        } else {
+            throw new ApiError(400, "Invalid body");
+        }
+    }
+    const body = buffer.toString();
+    if (type === "application/json" || type === "application/ld+json") {
+        return parseJson(body);
+    } else if (type === "application/x-www-form-urlencoded") {
+        const qs = require("querystring");
+        return qs.decode(body);
+    } else {
+        return body;
+    }
+}
+function getMaxContentLength(responseLimit) {
+    if (responseLimit && typeof responseLimit !== "boolean") {
+        return bytes.parse(responseLimit);
+    }
+    return RESPONSE_LIMIT_DEFAULT;
+}
+/**
+ * Send `any` body to response
+ * @param req request object
+ * @param res response object
+ * @param body of response
+ */ function sendData(req, res, body) {
+    if (body === null || body === undefined) {
+        res.end();
+        return;
+    }
+    // strip irrelevant headers/body
+    if (res.statusCode === 204 || res.statusCode === 304) {
+        res.removeHeader("Content-Type");
+        res.removeHeader("Content-Length");
+        res.removeHeader("Transfer-Encoding");
+        if (process.env.NODE_ENV === "development" && body) {
+            console.warn(`A body was attempted to be set with a 204 statusCode for ${req.url}, this is invalid and the body was ignored.\n` + `See more info here https://nextjs.org/docs/messages/invalid-api-status-body`);
+        }
+        res.end();
+        return;
+    }
+    const contentType = res.getHeader("Content-Type");
+    if (body instanceof Stream) {
+        if (!contentType) {
+            res.setHeader("Content-Type", "application/octet-stream");
+        }
+        body.pipe(res);
+        return;
+    }
+    const isJSONLike = [
+        "object",
+        "number",
+        "boolean"
+    ].includes(typeof body);
+    const stringifiedBody = isJSONLike ? JSON.stringify(body) : body;
+    const etag = generateETag(stringifiedBody);
+    if (sendEtagResponse(req, res, etag)) {
+        return;
+    }
+    if (Buffer.isBuffer(body)) {
+        if (!contentType) {
+            res.setHeader("Content-Type", "application/octet-stream");
+        }
+        res.setHeader("Content-Length", body.length);
+        res.end(body);
+        return;
+    }
+    if (isJSONLike) {
+        res.setHeader("Content-Type", "application/json; charset=utf-8");
+    }
+    res.setHeader("Content-Length", Buffer.byteLength(stringifiedBody));
+    res.end(stringifiedBody);
+}
+/**
+ * Send `JSON` object
+ * @param res response object
+ * @param jsonBody of data
+ */ function sendJson(res, jsonBody) {
+    // Set header to application/json
+    res.setHeader("Content-Type", "application/json; charset=utf-8");
+    // Use send to handle request
+    res.send(JSON.stringify(jsonBody));
+}
+function isNotValidData(str) {
+    return typeof str !== "string" || str.length < 16;
+}
+function setPreviewData(res, data, options) {
+    if (isNotValidData(options.previewModeId)) {
+        throw new Error("invariant: invalid previewModeId");
+    }
+    if (isNotValidData(options.previewModeEncryptionKey)) {
+        throw new Error("invariant: invalid previewModeEncryptionKey");
+    }
+    if (isNotValidData(options.previewModeSigningKey)) {
+        throw new Error("invariant: invalid previewModeSigningKey");
+    }
+    const jsonwebtoken = require("next/dist/compiled/jsonwebtoken");
+    const { encryptWithSecret  } = require("../crypto-utils");
+    const payload = jsonwebtoken.sign({
+        data: encryptWithSecret(Buffer.from(options.previewModeEncryptionKey), JSON.stringify(data))
+    }, options.previewModeSigningKey, {
+        algorithm: "HS256",
+        ...options.maxAge !== undefined ? {
+            expiresIn: options.maxAge
+        } : undefined
+    });
+    // limit preview mode cookie to 2KB since we shouldn't store too much
+    // data here and browsers drop cookies over 4KB
+    if (payload.length > 2048) {
+        throw new Error(`Preview data is limited to 2KB currently, reduce how much data you are storing as preview data to continue`);
+    }
+    const { serialize  } = require("next/dist/compiled/cookie");
+    const previous = res.getHeader("Set-Cookie");
+    res.setHeader(`Set-Cookie`, [
+        ...typeof previous === "string" ? [
+            previous
+        ] : Array.isArray(previous) ? previous : [],
+        serialize(COOKIE_NAME_PRERENDER_BYPASS, options.previewModeId, {
+            httpOnly: true,
+            sameSite: process.env.NODE_ENV !== "development" ? "none" : "lax",
+            secure: process.env.NODE_ENV !== "development",
+            path: "/",
+            ...options.maxAge !== undefined ? {
+                maxAge: options.maxAge
+            } : undefined,
+            ...options.path !== undefined ? {
+                path: options.path
+            } : undefined
+        }),
+        serialize(COOKIE_NAME_PRERENDER_DATA, payload, {
+            httpOnly: true,
+            sameSite: process.env.NODE_ENV !== "development" ? "none" : "lax",
+            secure: process.env.NODE_ENV !== "development",
+            path: "/",
+            ...options.maxAge !== undefined ? {
+                maxAge: options.maxAge
+            } : undefined,
+            ...options.path !== undefined ? {
+                path: options.path
+            } : undefined
+        }), 
+    ]);
+    return res;
+}
+async function revalidate(urlPath, opts, req, context) {
+    if (typeof urlPath !== "string" || !urlPath.startsWith("/")) {
+        throw new Error(`Invalid urlPath provided to revalidate(), must be a path e.g. /blog/post-1, received ${urlPath}`);
+    }
+    const revalidateHeaders = {
+        [PRERENDER_REVALIDATE_HEADER]: context.previewModeId,
+        ...opts.unstable_onlyGenerated ? {
+            [PRERENDER_REVALIDATE_ONLY_GENERATED_HEADER]: "1"
+        } : {}
+    };
+    try {
+        if (context.trustHostHeader) {
+            const res = await fetch(`https://${req.headers.host}${urlPath}`, {
+                method: "HEAD",
+                headers: {
+                    ...revalidateHeaders,
+                    cookie: req.headers.cookie || ""
+                }
+            });
+            // we use the cache header to determine successful revalidate as
+            // a non-200 status code can be returned from a successful revalidate
+            // e.g. notFound: true returns 404 status code but is successful
+            const cacheHeader = res.headers.get("x-vercel-cache") || res.headers.get("x-nextjs-cache");
+            if ((cacheHeader == null ? void 0 : cacheHeader.toUpperCase()) !== "REVALIDATED" && !(res.status === 404 && opts.unstable_onlyGenerated)) {
+                throw new Error(`Invalid response ${res.status}`);
+            }
+        } else if (context.revalidate) {
+            const { req: mockReq , res: mockRes , streamPromise ,  } = mockRequest(urlPath, revalidateHeaders, "GET");
+            await context.revalidate(mockReq, mockRes);
+            await streamPromise;
+            if (mockRes.getHeader("x-nextjs-cache") !== "REVALIDATED" && !(mockRes.statusCode === 404 && opts.unstable_onlyGenerated)) {
+                throw new Error(`Invalid response ${mockRes.statusCode}`);
+            }
+        } else {
+            throw new Error(`Invariant: required internal revalidate method not passed to api-utils`);
+        }
+    } catch (err) {
+        throw new Error(`Failed to revalidate ${urlPath}: ${isError(err) ? err.message : err}`);
+    }
+}
+export async function apiResolver(req, res, query, resolverModule, apiContext, propagateError, dev, page) {
+    const apiReq = req;
+    const apiRes = res;
+    try {
+        var ref, ref1, ref2;
+        if (!resolverModule) {
+            res.statusCode = 404;
+            res.end("Not Found");
+            return;
+        }
+        const config = resolverModule.config || {};
+        const bodyParser = ((ref = config.api) == null ? void 0 : ref.bodyParser) !== false;
+        const responseLimit = ((ref1 = config.api) == null ? void 0 : ref1.responseLimit) ?? true;
+        const externalResolver = ((ref2 = config.api) == null ? void 0 : ref2.externalResolver) || false;
+        // Parsing of cookies
+        setLazyProp({
+            req: apiReq
+        }, "cookies", getCookieParser(req.headers));
+        // Parsing query string
+        apiReq.query = query;
+        // Parsing preview data
+        setLazyProp({
+            req: apiReq
+        }, "previewData", ()=>tryGetPreviewData(req, res, apiContext));
+        // Checking if preview mode is enabled
+        setLazyProp({
+            req: apiReq
+        }, "preview", ()=>apiReq.previewData !== false ? true : undefined);
+        // Parsing of body
+        if (bodyParser && !apiReq.body) {
+            apiReq.body = await parseBody(apiReq, config.api && config.api.bodyParser && config.api.bodyParser.sizeLimit ? config.api.bodyParser.sizeLimit : "1mb");
+        }
+        let contentLength = 0;
+        const maxContentLength = getMaxContentLength(responseLimit);
+        const writeData = apiRes.write;
+        const endResponse = apiRes.end;
+        apiRes.write = (...args)=>{
+            contentLength += Buffer.byteLength(args[0] || "");
+            return writeData.apply(apiRes, args);
+        };
+        apiRes.end = (...args)=>{
+            if (args.length && typeof args[0] !== "function") {
+                contentLength += Buffer.byteLength(args[0] || "");
+            }
+            if (responseLimit && contentLength >= maxContentLength) {
+                console.warn(`API response for ${req.url} exceeds ${bytes.format(maxContentLength)}. API Routes are meant to respond quickly. https://nextjs.org/docs/messages/api-routes-response-size-limit`);
+            }
+            endResponse.apply(apiRes, args);
+        };
+        apiRes.status = (statusCode)=>sendStatusCode(apiRes, statusCode);
+        apiRes.send = (data)=>sendData(apiReq, apiRes, data);
+        apiRes.json = (data)=>sendJson(apiRes, data);
+        apiRes.redirect = (statusOrUrl, url)=>redirect(apiRes, statusOrUrl, url);
+        apiRes.setPreviewData = (data, options = {})=>setPreviewData(apiRes, data, Object.assign({}, apiContext, options));
+        apiRes.clearPreviewData = (options = {})=>clearPreviewData(apiRes, options);
+        apiRes.revalidate = (urlPath, opts)=>revalidate(urlPath, opts || {}, req, apiContext);
+        const resolver = interopDefault(resolverModule);
+        let wasPiped = false;
+        if (process.env.NODE_ENV !== "production") {
+            // listen for pipe event and don't show resolve warning
+            res.once("pipe", ()=>wasPiped = true);
+        }
+        // Call API route method
+        await resolver(req, res);
+        if (process.env.NODE_ENV !== "production" && !externalResolver && !isResSent(res) && !wasPiped) {
+            console.warn(`API resolved without sending a response for ${req.url}, this may result in stalled requests.`);
+        }
+    } catch (err) {
+        if (err instanceof ApiError) {
+            sendError(apiRes, err.statusCode, err.message);
+        } else {
+            if (dev) {
+                if (isError(err)) {
+                    err.page = page;
+                }
+                throw err;
+            }
+            console.error(err);
+            if (propagateError) {
+                throw err;
+            }
+            sendError(apiRes, 500, "Internal Server Error");
+        }
+    }
+}
+
+//# sourceMappingURL=node.js.map