Debug

app/crawler/crawl.js

@@ -59,16 +59,17 @@ async function crawlAll() {
       AKTIDO_CONFIG.AKTIDO_MAX_RESULTS_PER_PAGE,
       AKTIDO_CONFIG.AKTIDO_IGNORED_USERNAMES,
       AKTIDO_CONFIG.AKTIDO_DELAY_BETWEEN_PAGES
-    ),
-    new SaljicCrawler(
-      [postgresSaver],
-      SALJIC_CONFIG.SALJIC_CRAWLER_AD_TYPE,
-      SALJIC_CONFIG.SALJIC_CRAWLER_AD_CATEGORIES,
-      SALJIC_CONFIG.SALJIC_MAX_PAGES,
-      SALJIC_CONFIG.SALJIC_MAX_RESULTS_PER_PAGE,
-      SALJIC_CONFIG.SALJIC_IGNORED_USERNAMES,
-      SALJIC_CONFIG.SALJIC_DELAY_BETWEEN_PAGES
     )
+    //,
+    //new SaljicCrawler(
+      //[postgresSaver],
+      //SALJIC_CONFIG.SALJIC_CRAWLER_AD_TYPE,
+      //SALJIC_CONFIG.SALJIC_CRAWLER_AD_CATEGORIES,
+      //SALJIC_CONFIG.SALJIC_MAX_PAGES,
+      //SALJIC_CONFIG.SALJIC_MAX_RESULTS_PER_PAGE,
+      //SALJIC_CONFIG.SALJIC_IGNORED_USERNAMES,
+      //SALJIC_CONFIG.SALJIC_DELAY_BETWEEN_PAGES
+    //)
   ];
 
   const newRealEstates = [];

app/crawler/specificCrawlers/olx.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const fetch = require("../../helpers/fetchWrapper");
+const { logDebug } = require("../../helpers/log");
 const cheerio = require("cheerio");
 const Promise = require("bluebird");
 const moment = require("moment-timezone");
@@ -45,6 +46,16 @@ const OLX_ENUMS = {
 
 const { OLX_FORCE_CRAWL } = require("../specificConfigs/olx");
 
+const chunk = (array, size = 10) => {
+  let i, j ,temparray;
+  const result = []
+  for (i=0,j=array.length; i<j; i+=size) {
+    temparray = array.slice(i,i+size);
+    result.push(temparray);
+  }
+  return result;
+}
+
 class OlxCrawler {
   constructor(
     savers = [],
@@ -66,6 +77,7 @@ class OlxCrawler {
   }
 
   async crawl() {
+    logDebug("Starting OLX crawl");
     const crawlAdCategories = this.crawlerAdCategories;
 
     const newRealEstates = [];
@@ -227,19 +239,21 @@ class OlxCrawler {
         asyncScraping.push(hrefs[i]);
       }
 
-
+      const allChunks = chunk(asyncScraping, 2);
       const dataResults = []
-      const { scrapedData, errors } = await PromisePool
-        .withConcurrency(2)
-        .for(asyncScraping)
-        .process(async data => {
-          const result = await this.scrapeAd(data)
-          await this.sleep(this.delayBetweenPages);
-          dataResults.push(result)
-          return result; //TODO: this does not work, scrapedData is null, dataResults works
-        })
+      for (let i = 0; i < allChunks.length; i++) {
+        const singleChunk = allChunks[i];
+        const promises = singleChunk.map(c => this.scrapeAd(c))
+        const chunkResults = await Promise.all(promises);
+        await this.sleep(this.delayBetweenPages);
+        dataResults.push(...chunkResults);
+        logDebug("Chunk results len:", chunkResults.length);
+      }
+
 
       const filteredScrapedData = dataResults.filter(adData => !!adData);
+      logDebug("Filtered scraped data length: ", filteredScrapedData.length);
+
       return filteredScrapedData;
     } catch (e) {
       console.error("Exception caught:" + e);
@@ -248,7 +262,7 @@ class OlxCrawler {
   }
 
   async scrapeAd(url) {
-    //console.log("Scraping : ", url);
+    logDebug("Scraping : ", url);
     try {
       const adPageSource = await fetch(url);
       const body = await adPageSource.text();

app/helpers/log.js

@@ -0,0 +1,13 @@
+const {
+  PRINT_CRAWLER_DEBUG
+} = require("../config/appConfig");
+
+const logDebug = (...args) => {
+  if (PRINT_CRAWLER_DEBUG) {
+    console.log(...args);
+  }
+}
+
+module.exports = {
+  logDebug
+};

index.js

@@ -4,6 +4,7 @@ const bodyParser = require("body-parser");
 const layout = require("express-layout");
 const compression = require("compression");
 const forceSSL = require("./app/helpers/forceSSL");
+const { logDebug } = require("./app/helpers/log");
 
 const {
   APP_PORT,
@@ -38,9 +39,11 @@ app.listen(APP_PORT, () =>
 
 let crawlerRunning = STOP_CRAWLER;
 const crawl = () => {
+  logDebug("Crawl start");
   if (!crawlerRunning) {
     crawlerRunning = true;
     crawlAll().then(newRealEstates => {
+      logDebug("crawlAll done, new real estate len: ", newRealEstates.length);
       crawlerRunning = false;
       notifyForNewRealEstates(newRealEstates);
     });