用于受密码保护的网站的nodejs Web抓取工具 [英] nodejs web scraper for password protected website

问题描述

我正在尝试使用nodejs抓取一个网站，并且该网站在不需要任何身份验证的网站上可以完美运行.但是，每当我尝试使用要求用户名和密码的表单来抓取网站时，我只会从身份验证页面获取HTML(也就是说，如果您单击身份验证页面上的查看页面源"，它本身就是HTML)得到).我可以使用curl获得所需的HTML

I am trying to scrape a website using nodejs and it works perfectly on sites that do not require any authentication. But whenever I try to scrape a site with a form that requires username and password I only get the HTML from the authentication page (that is, if you would click 'view page source' on the authentication page it self, that is the HTML I get). I am able to get the desired HTML using curl

curl -d "username=myuser&password=mypw&submit=Login" URL

这是我的代码...

var express = require('express');
var fs = require('fs'); //access to file system
var request = require('request');
var cheerio = require('cheerio');
var app     = express();

app.get('/scrape', function(req, res){
url = 'myURL'

request(url, function(error, response, html){

    // check errors
    if(!error){
        // Next, we'll utilize the cheerio library on the returned html which will essentially give us jQuery functionality
        var $ = cheerio.load(html);

        var title, release, rating;
        var json = { title : "", release : "", rating : ""};

        $('.span8 b').filter(function(){
            // Let's store the data we filter into a variable so we can easily see what's going on.
            var data = $(this);
            title = data.first().text();
            release = data.text();

            json.title = title;
            json.release = release;
        })
    }
    else{
        console.log("Error occurred: " + error);
    }

    fs.writeFile('output.json', JSON.stringify(json, null, 4), function(err){

        console.log('File successfully written! - Check your project directory for the output.json file');

    })

    res.send('Check your console!')
})

})

app.listen('8081')
console.log('Magic happens on port 8081');
exports = module.exports = app;

我尝试了以下方法...

I have tried the following...

var request = require('request',
    username:'myuser',
    password:'mypw');

这只是返回身份验证页面的HTML

This just returns the authentication page's HTML

request({form: {username:myuser, password:mypw, submit:Login}, url: myURL}, function(error, response, html){
    ...
    ...
    ...
}

这也只返回身份验证页面的HTML

This also just returns the authentication page's HTML

所以我的问题是如何使用nodejs实现这一目标?

So my question is how do I achieve this using nodejs?

推荐答案

您不应使用.get而是.post并在通话中添加post参数(用户名和密码)

you shouldn't use .get but .post and put the post param (username and password) in your call

request.post({
  headers: {'content-type' : 'application/x-www-form-urlencoded'},
  url:     url,
  body:    "username=myuser&password=mypw&submit=Login"
}, function(error, response, html){
    //do your parsing... 
    var $ = cheerio.load(html)
});

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