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extend download script and minor changes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| import Config from './../../config'; | ||
| import mkdirp from 'mkdirp'; | ||
| import fs from 'fs'; | ||
| import https from 'https'; | ||
| import { downloadLog } from './../../../util/logger'; | ||
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| const { performance } = require('perf_hooks'); | ||
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| /** | ||
| * download specific sql dump tables for all languages given as input | ||
| * | ||
| * @param {Array} langs list of languages | ||
| * | ||
| */ | ||
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| let totalTemp = 0, failed = 0; | ||
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| export default async function downloadAll(langs){ | ||
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| console.log('File download started ...'); | ||
| downloadLog.info('File download started ...'); | ||
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| // total to download | ||
| let total = langs.length * Config.tables.length; | ||
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| mkdirp.sync(Config.dumpLocation); | ||
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| let errorLog = fs.createWriteStream(Config.downloadError, { flags: 'a' }); | ||
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| const t0 = performance.now(); | ||
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| for await (const lang of langs) { | ||
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| //download needed tables | ||
| for await (const table of Config.tables){ | ||
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| let link = Config.linkPrefix + lang + 'wiki' + '/' + Config.dumpDate + '/' + lang + 'wiki-' + Config.dumpDate + '-' + table; | ||
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| await downloadOne(link, lang, table, total, errorLog); | ||
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| } | ||
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| // reduce the load by delaying the execution | ||
| await new Promise(resolve => setTimeout(resolve, 5*1000)); | ||
| } | ||
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| const t1 = performance.now(); | ||
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| downloadLog.info(`{time: ${(t1 - t0) / 1000}, failed: ${failed}}`); | ||
| console.log(` | ||
| Time taken: ${(t1 - t0) / 1000} s | ||
| Failed : ${failed} | ||
| `); | ||
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| } | ||
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| /** | ||
| * function to download one file with retry | ||
| * | ||
| */ | ||
| async function downloadOne(link, lang, table, total, errorLog, leftRetries = Config.maxRetries){ | ||
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| if(leftRetries <= 0){ | ||
| throw 'limit # of query retries reached ! ' ; | ||
| return ; | ||
| } | ||
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| try{ | ||
| await new Promise (resolve=> { | ||
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| https.get(link, res => { | ||
| if(res.statusCode == 200){ | ||
| // create language folder | ||
| mkdirp.sync(Config.dumpLocation + lang); | ||
| const path = Config.dumpLocation + lang + '/' + lang + 'wiki-' + Config.dumpDate + '-' + table; | ||
| const filePath = fs.createWriteStream(path); | ||
| res.pipe(filePath).on('finish',() => { | ||
| filePath.close(); | ||
| totalTemp ++ ; | ||
| downloadLog.info(`${totalTemp} / ${total} files , downloaded ! (${lang})`); | ||
| console.log(`${totalTemp} / ${total} files , downloaded ! (${lang})`); | ||
| resolve(); | ||
| }); | ||
| } | ||
| else { | ||
| errorLog.write(`{lang: ${lang} , link: ${link} , statusCode: ${res.statusCode}}`); | ||
| errorLog.write('\r\n'); | ||
| failed ++; | ||
| resolve(); | ||
| } | ||
| }); | ||
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| }); | ||
| } | ||
| catch(e){ | ||
| //if some network failure occurs, retry | ||
| if (e.code == 'ECONNREFUSED' || e.code == 'ECONNRESET' || e.code == 'ETIMEDOUT' || e.code == 'EAI_AGAIN' || e.code == 'EHOSTUNREACH') { | ||
| failed ++; | ||
| //write error in log together with query | ||
| errorLog.write(`{ errorCode: ${e.code}, errorMessage: ${e.message}, lang: ${lang} , link: ${link} , leftRetries: ${leftRetries}}`); | ||
| errorLog.write('\r\n'); | ||
| // reduce the load by delaying the execution | ||
| await new Promise(resolve => setTimeout(resolve, Config.defaultDelay * 1000)); | ||
| //retry ; | ||
| return await downloadOne(link, lang, table, total, errorLog, leftRetries - 1); | ||
| } | ||
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| else { | ||
| console.log(e); | ||
| return; | ||
| } | ||
| } | ||
| } |
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