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CTFileCrawler.js
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CTFileCrawler.js
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const puppeteer = require('puppeteer');
const fs = require('fs');
const mongoose = require('mongoose');
const process = require('process');
const Book = require('./models/book');
const LOG4JS = require('./logger');
const Logger = LOG4JS.download_logger;
const StatsLogger = LOG4JS.stats_logger;
const CREDS = require('./creds');
const Configs = require('./configs');
var statCount = 0;
async function upsertBook(bookObj) {
assertMongoDB();
// if this email exists, update the entry, don't insert
const conditions = { bookUrl: bookObj.bookUrl };
const options = { upsert: true, new: true, setDefaultsOnInsert: true };
var query = Book.findOneAndUpdate(conditions, bookObj, options);
const result = await query.exec();
return ;
}
async function getSelectorHref(page, selector) {
let tc = await page.evaluate((sel) => {
if(document.querySelector(sel) != null){
let baidu_url = document.querySelector(sel).getAttribute("href");
return baidu_url;
}
else
return null;
}, selector);
return tc;
}
async function getTextContent(page, selector) {
let tc = await page.evaluate((sel) => {
if(document.querySelector(sel) != null)
return document.querySelector(sel).textContent;
else
return null;
}, selector);
return tc;
}
async function fetchBook(sobookUrl, bookUrl)
{
const browser = await puppeteer.launch({
headless: false,
ignoreHTTPSErrors: true,
defaultViewport: null
});
// Download and wait for download
const page = await browser.newPage();
// await injectCookiesFromFile(page, Configs.cookieFile);
// await page.waitFor(5 * 1000);
const client = await page.target().createCDPSession();
// intercept request when response headers was received
client.send('Network.setRequestInterception', {
patterns: [{
urlPattern: '*',
resourceType: 'Document',
interceptionStage: 'HeadersReceived'
}],
});
await client.on('Network.requestIntercepted', async e => {
let headers = e.responseHeaders || {};
let contentType = headers['content-type'] || headers['Content-Type'] || '';
let obj = {interceptionId: e.interceptionId};
if (contentType.indexOf('application/zip') > -1) {
obj['errorReason'] = 'BlockedByClient';
console.log(headers);
}
await client.send('Network.continueInterceptedRequest', obj);
});
var isBrowserClosed = false;
await browser.on( 'disconnected', async ()=>{
Logger.trace('Browser is closed');
isBrowserClosed = true;
});
// await page.goto(bookUrl, {waitUntil: 'load'});
// await page.goto(bookUrl);
await page.goto(bookUrl, {waitUntil: 'networkidle2', timeout:0,});
await page.waitFor(5*1000);
var is_mobi_page = false;
const BOOK_FILE_SEL = '#page-content > div.page-header.position-relative > div > div.pull-left > h3';
const BOOK_NAME = '#table_files > tbody > tr > td:nth-child(2) > a'
let book_file_name = await getTextContent(page, BOOK_NAME);
Logger.trace('resolved book name'+ book_file_name);
// if(book_file_name !=null && book_file_name.indexOf(".mobi")>0)
// {
// Logger.info(book_file_name+" Direct Page Found");
// is_mobi_page = true;
// }
if(is_mobi_page)
{
const DL_BUTTON = '#free_down_link';
// await page.waitFor(5*1000);//会有找不到输入框的异常,加上一个弱等待试试
// let download_href = await getSelectorHref(page, BOOK_SEL);
await page._client.send('Page.setDownloadBehavior', {
behavior: 'deny'
});
// page.click(BOOK_SEL);
// await page.goto(download_href, {waitUntil: 'load'});
await page.on('response', async response => {
// If response has a file on it
if (response._headers['content-disposition'] === 'attachment') {
// Get the size
var bookSize = Number(response._headers['content-length']);
var bookSize_m = bookSize/1024/1024 > 50 ;
var download_url =response._url;
Logger.trace('BOOK Size : '+ bookSize);
Logger.info("DOWNLOAD URL CATCHED!!");
// save url to DB for later download workers.
await upsertBook({"bookUrl":sobookUrl,
"ctdownloadUrl":download_url,
"bookSize":bookSize,
"hasMobi": bookSize_m
});
statCount ++;
await browser.close();
//statLogger();
// var child = require('child_process').fork(Configs.workingPath+'CTDownloader.js',[download_url] );
// await CTDownloader.downloadBook(download_url);
}
});
await page.click(DL_BUTTON);
await page.waitFor(10*1000);
// set timeout to close a browser for leak provention
// await browser.close();
// setTimeout(()=>{ await browser.close() }, 2*, 'funky');
Logger.trace("About to exit the CTFileCrawl mini Session");
}
else{
//we can do more than HAS MOBI
await upsertBook({"bookUrl":sobookUrl,
"hasMobi":false
});
//should mark the book as mobi-less version
}
if(isBrowserClosed == false)
{
Logger.info("FORCING browser to close.");
await browser.close();
}
return ;
}
async function fillcode(page, codeUrl, code)
{
const CHECKCODE_SELECTOR = '#passcode';
const BUTTON_SELECTOR = '#main-content > div > div.row.flex-center.pt-6.text-center > div > div > div > div:nth-child(4) > div:nth-child(2) > button';
//const CHECKCODE_SELECTOR = '#pwd';
//const BUTTON_SELECTOR = '#sub'
//Logger.trace("the code is:"+code);
await page.goto(codeUrl, {waitUntil: 'networkidle2', timeout:0,});
let no_checkcode = await page.evaluate(() => {
const CHECKCODE_SELECTOR = '#passcode';
let el = document.querySelector(CHECKCODE_SELECTOR)
return el==null;
})
if (no_checkcode==true)
return;
await page.click(CHECKCODE_SELECTOR);
await page.keyboard.type(code);
//await page.keyboard.type(CREDS.download_code);
await page.click(BUTTON_SELECTOR);
// await page.click(BUTTON_SELECTOR).then(() => page.waitForNavigation({waitUntil: 'load'}));
await page.waitFor(10*1000);
}
const url = require('url');
async function fetchBookDir(sobookUrl, bookObj)
{
const browser = await puppeteer.launch({
headless: true,
ignoreHTTPSErrors: true,
defaultViewport: null
});
// Download and wait for download
const page = await browser.newPage();
const bookUrl = bookObj["ctdiskUrl"];
await fillcode(page, bookUrl, '666888');
await page.setUserAgent('Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36');
// await injectCookiesFromFile(page, Configs.cookieFile);
// await page.waitFor(5 * 1000);
const client = await page.target().createCDPSession();
// intercept request when response headers was received
client.send('Network.setRequestInterception', {
patterns: [{
urlPattern: '*',
resourceType: 'Document',
interceptionStage: 'HeadersReceived'
}],
});
await client.on('Network.requestIntercepted', async e => {
let headers = e.responseHeaders || {};
let contentType = headers['content-type'] || headers['Content-Type'] || '';
let obj = {interceptionId: e.interceptionId};
if (contentType.indexOf('application') > -1) {
// obj['errorReason'] = 'BlockedByClient';
//Logger.info(e);
}
await client.send('Network.continueInterceptedRequest', obj);
});
var isBrowserClosed = false;
await browser.on( 'disconnected', async ()=>{
Logger.trace('Browser is closed');
isBrowserClosed = true;
});
Logger.trace('book ctdisk Url:'+bookUrl);
await page.goto(bookUrl, {waitUntil: 'networkidle2', timeout:0,});
await page.waitFor(5*1000);
const BOOK_SEL = '#table_files > tbody > tr:nth-child(INDEX) > td:nth-child(2) > a';
const BOOK_NAME = '#table_files > tbody > tr > td:nth-child(2) > a';
var extension = "";
var download_href = "";
var formats = [];
var download_pages = [];
for (var i = 1; i < 4; i++) {
let booknameSelector = BOOK_SEL.replace("INDEX", i);
if (await page.$(booknameSelector) != null)
{
let bookname = await getTextContent(page, booknameSelector);
// var format = bookname.split('.').pop();
//Logger.trace("trying to find the format url for "+bookname);
if(bookname !=null)
{
Logger.info(bookname+" Found");
a = bookname.split(".");
booktype = a[a.length-1];
formats.push(booktype.toLowerCase());
let page_url = await getSelectorHref(page, booknameSelector);
download_pages.push(page_url);
}
}
}
const format_seq = ['epub', 'zip','mobi', 'azw3']
for (var i =0; i<format_seq.length;i++)
{
var index = formats.indexOf(format_seq[i])
if(index >= 0 )
{
extension=formats[index];
download_href=download_pages[index];
Logger.info("Format found"+ extension +' @'+download_href);
break;
}
}
if(download_href.length > 0){
const DL_BUTTON = '#main-content > div > div > div:nth-child(5) > div:nth-child(1) > div.card-body.position-relative > button';
var current_url = page.url();
var site_name = url.parse(current_url, true);
//console.log("page's url :->"+page.url());
download_href = "https://"+site_name.host + download_href;
await page._client.send('Page.setDownloadBehavior', {
behavior: 'deny'
});
// page.click(BOOK_SEL);
// await page.goto(download_href, {waitUntil: 'load'});
await page.on('response', async response => {
// If response has a file on it
var ct = response._headers['content-type'];
//'application/epub+zip'
if (ct === 'application/zip'
|| ct ==='application/octet-stream'
|| ct ==='application/epub+zip'
)
{
//if (ct.indexOf('application/zip')>-1) {
// Get the size
// const text = await response.text();
var bookSize = Number(response._headers['content-length']);
var overSized = bookSize/1024/1024 > 50 ;
var download_url =response._url;
Logger.info("DOWNLOAD URL CATCHED!!");
Logger.trace(download_url);
// save url to DB for later download workers.
await upsertBook({"bookUrl":sobookUrl,
"ctdownloadUrl":download_url,
"bookSize":bookSize,
"ext":extension,
"overSized":overSized,
"lastCrawlCopyTime": new Date()
});
statCount ++;
await browser.close();
StatsLogger.info("CTFileCrawler catch: "+bookObj.cursorId +" "+bookObj.bookName);
//statLogger();
// var child = require('child_process').fork(Configs.workingPath+'CTDownloader.js',[download_url] );
// await CTDownloader.downloadBook(download_url);
}
});
Logger.trace("download info: "+download_href);
await page.goto(download_href, {waitUntil: 'networkidle2', timeout:0,});
//await page.waitFor(5*1000);//会有找不到输入框的异常,加上一个弱等待试试
await page.click(DL_BUTTON);
await page.waitFor(20*1000);
// set timeout to close a browser for leak provention
// await browser.close();
// setTimeout(()=>{ await browser.close() }, 2*, 'funky');
Logger.trace("About to exit the CTFileCrawl mini Session");
}
else
{
var err = bookObj['ctError']?book['ctError']:0;
await upsertBook({"bookUrl":sobookUrl,
"ctError":++err
});
//should mark the book as mobi-less version
}
if(isBrowserClosed == false)
{
Logger.info("FORCING browser to close.");
await browser.close();
}
return ;
}
function assertMongoDB()
{
if (mongoose.connection.readyState == 0) {
mongoose.connect( Configs.dbUrl);
}
}
async function assertBook() {
assertMongoDB();
// const conditions = { "baiduUrl": {"$exists": false}} ;
const conditions = { "$and":[{"ctdiskUrl": {"$exists": true}}
,{"ctdiskUrl":{"$ne":"NONE"}}
,{"overSized":{"$exists":false}}
,{"ctError":{"$exists":false}}
,{ "$or":[
{"ctdownloadUrl":{"$exists":false}}
,{"ctdownloadUrl":{"$eq":null}}
]}
]
} ;
const downloadConditions = {
"$and":[{"ctdownloadUrl":{"$exists":true} }
,{"downloaded":{"$exists":false}}
,{"overSized":{"$eq":false}}
]
};
//const options = { limit: Configs.crawlStep , sort:{"cursorId": -1} };
const options = { sort:{"cursorId": -1} };
var dl_query = Book.find(downloadConditions ,null ,options);
var query = Book.find(conditions ,null ,options);
const dl_result = await dl_query.exec();
StatsLogger.info("CTFileCrawler "+dl_result.length+" books to be Downloaded ...");
//if(dl_result.length > 10)
// return [];
const result = await query.exec();
console.log(result);
return result;
}
// exports.run =
async function automate() {
/*
1- query from mongodb for impartial entry to be further crawl for detail
2- use the crawl func and save it to db
3- stop when MAX_CRAWL_NUM exceed or the db is out of candidate
*/
var r = await assertBook();
if(r.length > 0)
StatsLogger.info(r.length+" books to be CTed ...");
const limit = Configs.crawlStep;
for (var i = 0; i < r.length; i++)
{
book = r[i];
Logger.trace("NO. "+i+" book: "+book.bookName);
var book_url = book.ctdiskUrl;
//Should be before this function
var split = book_url.split('/');
// if(split[3] == 'dir'){
// await fetchBookDir(book.bookUrl, book.ctdiskUrl);
// }
// else if(split[3] == 'fs')
{
//Logger.trace('gonna go :'+book_url);
//await fetchBookDir(book.bookUrl, book.ctdiskUrl);
var code = book.ctdiskUrl2_code;
Logger.trace("Book Url :"+book.bookUrl);
await fetchBookDir(book.bookUrl, book)
}
}
if(r.length > 0)
StatsLogger.info("CTFileCrawler catch rate :"+statCount+"/"+r.length);
}
/*
main
*/
(async () => {
try {
//Logger.info("CTFileCrawler Session roll out PID: ", process.pid);
await automate();
mongoose.connection.close();
//Logger.info("CTFileCrawler Session END PID: ", process.pid);
// as the CTFileCrawler often STALLED for the sake of FileDownloading Async Calls
// we should check it to kill itself and children as well.
// NOTE!!! Such way works, the scheduler should not shoot the Jammer.
// Logger.warn("And I should kill myself here and now @"+process.pid);
// process.kill(process.pid, "SIGINT");
} catch (e) {
Logger.error('we got an ERROR \n'+e.Error());
//throw(e);
mongoose.connection.close();
return;
}
})();