node.js的request模块

1: var request = require('request');

       2:  

       3: request('http://www.google.com', function (error, response, body) {

       4:   if (!error && response.statusCode == 200) {

       5:     console.log(body);

       6:   }

       7: })

1: var request = require('request'),

       2:     fs = require('fs');

       3:  

       4: request('https://www.google.com.hk/images/srpr/logo3w.png').pipe(fs.createWriteStream('doodle.png'));

1: var request = require('request'),

       2:     fs = require('fs');

       3:  

       4:  

       5: var reqUrl = 'http://hotel.qunar.com/price/detail.jsp?fromDate=2012-08-18&toDate=2012-08-19&cityurl=shanghai_city&HotelSEQ=shanghai_city_2856&cn=5';

       6:  

       7: request({uri:reqUrl}, function(err, response, body) {

       8:     

       9:     //console.log(response.statusCode);

      10:     //console.log(response);

      11:     

      12:     //如果数据量比较大，就需要对返回的数据根据日期、酒店ID进行存储，如果获取数据进行对比的时候直接读文件

      13:     var filePath = __dirname + '/data/data.js';

      14:     

      15:     if (fs.exists(filePath)) {

      16:         fs.unlinkSync(filePath);

      17:  

      18:         console.log('Del file ' + filePath);

      19:     }

      20:     

      21:     fs.writeFile(filePath, body, 'utf8', function(err) {

      22:         if (err) {

      23:             throw err;

      24:         }

      25:  

      26:         console.log('Save ' + filePath + ' ok~');

      27:     });

      28:     

      29:     console.log('Fetch ' + reqUrl + ' ok~');

      30: });