node-scrapeurl

A simple nodejs web scraper util that is more capable of scraping sites with anti-scraper functionality.

introduction

scrapeurl is a web scrape util base on superagent to make requests and iconv-lite to support more charset of web pages. What scrapeurl does is to do the useragent-switching-like things under the hook, and express you a simple api. scrapeurl makes web scraping effective and harder be detected.

installation

npm install scrapeurl

features

• Do useragent switching, ip switching(change 'X_FORWARDED_FOR' header),referer switching and so on under the hook. Make scraping harder be detected.
• Charset support. Scrape charset=gbk like web pages easier.

usage

you use scrapeurl as below: scrapeurl(config,callback).done(doneCallback).fail(failCallback)

• config is an object as:

{
    url:'your url', //require
    delay:1000,//optional defaults to 0, delay by millisecond,
    retry:3,//optional defaults to 0, retry times if error when scraping the url
    charset:'utf8',//optional defaults to null
    userAgent:'custom useragent',//optional defaults to random agent generate by scrapeurl
    ip:'custom ip',//optional defaults to random ip generate by scrapeurl
    referer:'custom referer',//optional defaults to random referer generate by scrapeurl
}

scrapeurl use iconv-lite to do the charset conversion, all supported encoding can be found in iconv-lite

• callback will receive two auguments as callback(err,response).scrapeurl is based on superagent, and the err and respone are coming from superagent,you may refer to superagent for more details.

• doneCallback will be called when the scraping succeeds as doneCallback(response)

• failCallback will be called when the scraping fails as failCallback(err,response)

example

 const scrapeurl = require('scrapeurl')
 scrapeurl({
    url:'your url'
    },function(err,response){
        //do your thing with the response
    })

you may also use it with done and fail :

 const scrapeurl = require('scrapeurl')
 scrapeurl({
    url:'your url'
    }).done(function(response){
        //success code
    }).fail(function(err,response){
        //fail code
    })

notes

Most of the time, you don't have to specify charset in the config, but when you are scraping a Chinese web page with charset=gb2312 or charset=gbk in the meta tag, if you don't specify charset:'gbk' in the config, the response text you scrapes will mess up with the wrong encoding. Since scrapeurl use the parse api of superagent to do the charset job,if you specify charset in the config, the reponse.body will not be available.

dependencies

superagent iconv-lite