NodeJs实现简单的爬虫功能案例分析

var cheerio = require('cheerio');
var requests = require('requests');
var async = require('async');
var express = require('express');
var swig = require('swig');
var app = express();
swig.setDefaults({cache:false});
app.set('views','./views/');
app.set('view engine','html');
app.engine('html',swig.renderFile);
app.get('/',function(req,res,next){
 var page = 1; //当前页数
 var list = []; //保存记录
 async.whilst(
  function(){
   return page <11;
  },
  function(callback){
   requests(`https://www.zhipin.com/c101280100-p100901/&＃63;page=${page}&ka=page-next`)
   .on('data',function(chunk){
   var $ = cheerio.load(chunk.toString());
   $('.job-primary').each(function(){
    var company = $(this).find('.info-company .company-text .name').text();
    var job_title = $(this).find('.info-primary .name .job-title').text();
    var salary = $(this).find('.info-primary .name .red').text();
    var description = $(this).find('.info-company .company-text p').text();
    var area = $(this).find('.info-primary p').text();
    var item = {
     company:company,
     job_title:job_title,
     salary:salary,
     description:description,
     area:area
    };
    list.push(item);
   });
   page++;
   callback();
   }).on('end',function(err){
     if(err){
      console.log(err);
     }
     if(page==10){
     res.render('index',{
      lists:list
     });
    }
   });
  },
  function(err){
   console.log(err);
  }
 );
});

//监听
app.listen(8080);

 
 



 
   {% for list in lists %}
    
   {% endfor %}
  

  

   

    
公司名称
    
公司地址
    
薪资
    
公司描述
    
岗位名称
   
  
  

     
{{list.company}}
     
{{list.area}}
     
{{list.salary}}
     
{{list.description}}
     
{{list.job_title}}