recently, I want to use node to write a crawler tool. On the one hand, I want to nodejs, and on the other hand, I think crawler is a good example to improve the front-end knowledge. But I don t have much work experience, and I don t know or use crawle...
1, Code: const express = require ( express ); const superagent = require ( superagent ); const cheerio = require ( cheerio ); const app = express (); const test = express (); app.get ( , (req, res,next) = > { superagent.get( https: w...
problem description has written about simple crawlers. According to the web page opened by url , the content in the web page is the information to be crawled, which is easier to do. now the page defaults to no data or not the data you want, so you n...
async function downImgForSrc(src){ if(!src)return let params = { url: src, method: get , responseType: blob } try{ let res = await axios(params) let bl...
The same is true in the debugging tools of browsers, but there is no problem when it is displayed on the web page. Is there any solution for crawlers made with node ...
There used to be an interface upload, on the java side to call and pass formData directly on the client side. now uses node as a proxy to make it possible to interact directly with the test environment locally when developing locally. When the client...
serer.js I would like to use the following method to act as a proxy. I can get the data of the test environment locally and debug it locally. options-related configuration let request = http.request(options, function(response){ respon...
the code is as follows: var cheerio = require( cheerio ); var superagent1 = require( superagent ); var eventproxy = require( eventproxy ); var async = require( async ); var utils = require( . utils ); var install = requir...
the node service is opened at the front end. When calling interface an of the test environment, you can access it with localhost:3000 a, and then use the request of node to request the address of the test environment. Equivalent to being an agent but ...
if you use superagent to request a web page, not all ssr page data can be obtained through the interface (I know it s good to climb the interface directly, but I have a special need to do so). I hope to get the data in the form of cheerio analysis page...
the small crawler written by node reported an error when it was written to parse the crawled data with cheerio, saying that it was a problem of circular invocation. Paste code: $( -sharplive-list-contentbox>li ).each((i, ele) => { l...
phantomjs crawl NetEase Yun music playlist, the code is as follows var webpage = require( webpage ); var page = webpage.create(); page.open( https: img.codeshelper.com upload img 2021 04 11 4sxkk4v4vs016110.png ); console.log(page.cont...
I am using Phantomjs for automatic login <script type="text html" id="js_table_tpl"> {if data.length} {each data as item i} <div class="user_item"> <div class="user_item_inner"> <...
how should I write such a question? use the node package superagent, to save the picture to the local disk. Then return the address to the front end. ...
there is an error downloading pdf files in batches using download module. In the process of downloading, it always stops when downloading more than 20 or 40 files var arr = [{ url: "http: pdf.dfcfw.com pdf H2_AN201803271111860450_1.pdf&qu...
print and see that it has been 5 seconds since the whole request. I don t know why ...
I want to climb some e-commerce websites, which have a lot of pictures. Now I m using cheerio,. I find that it can t get the images loaded lazily on the page, that is, the images generated by js processing. Is there any way or other library to do this?...
ask for help, boss! Superagent post submits the form data to the database with garbled code as follows: ...
the business you want to achieve is to render the page first, and then add content to the page through ctx.body the core code is as follows await ctx.render( crawler , { title: , content: `<h2>< h2> <h4>...
how does superagent get url after redirection my previous idea was to set .redirects (0) , and then get the redirected url, by Location in the response header, but this failed ask the great god what I should do ...