nodejs -- http模块. request() 方法 , get方法.

1. request方法:

提交评论到慕课网:

 var http = require('http');
 var querystring = require('querystring');
 
 var postData = querystring.stringify({
     'content': '很喜欢Scot老师的课程. 希望尽快学会nodejs!',
     'cid': 348
 });
 
 var options = {
     hostname: 'www.imooc.com',
     port: 80,
     path: '/course/docomment',
     method: 'POST',
     headers: {
         'Accept':'application/json, text/javascript, */*; q=0.01',
         'Accept-Encoding':'gzip, deflate',
         'Accept-Language':'zh-CN,zh;q=0.8',
         'Connection':'keep-alive',
         'Content-Length':postData.length,
         'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8',
         'Cookie':'PHPSESSID=lvk77ha5lgp411jqbl2n9dovd0; imooc_uuid=94406a08-7461-473e-8676-a730e6d1f16a; imooc_isnew=1; imooc_isnew_ct=1501826723; loginstate=1; apsid=E0M2ExNjBmNWQwN2Q0MDc0YzhhZWUwMmY4MTg3NmEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMTM1NTg1NAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4X2RhY2hlbmdAMTI2LmNvbQAAAAAAAAAAAAAAAAAAAGY3YzYwNzdjYjlmMjBkYTA0OWI0OWE3ZjhiZDgxMzEz6Q6EWekOhFk%3DNm; last_login_username=x_dacheng%40126.com; Hm_lvt_f0cfcccd7b1393990c78efdeebff3968=1501826670; Hm_lpvt_f0cfcccd7b1393990c78efdeebff3968=1501826738; IMCDNS=0; cvde=59840ea3a723c-7',
         'Host':'www.imooc.com',
         'Origin':'http://www.imooc.com',
         'Referer':'http://www.imooc.com/comment/348',
         'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.86 Safari/537.36',
         'X-Requested-With':'XMLHttpRequest'
     }
 };
 
 //发送请求:
 var req = http.request(options, function(res){
 
     console.log('status: ' + res.statusCode);
     console.log('headers: ' + JSON.stringify(res.headers));
 
     res.on('data', function(chunk){
         console.log(Buffer.isBuffer(chunk));
         console.log(typeof chunk);
     });
 
     res.on('end', function(){
         console.log('评论完毕!');
     });
 });
 
 req.on('error', function(e){
     console.log('Error: ' + e.message);
 });
 
 //写入请求数据:
 req.write(postData);
 
 //结束请求:必须写的:
 req.end();

注意:

　　第56行的代码:   req.end(); 必须写.

------------------

2. get() 方法.

get方法是 对 request方法的封装,    get方法 自带 req.end()

nodejs 请求端: get.js

 var http = require('http');
 var querystring = require('querystring');
 
 var postData = {
     'name': '小明',
     'age': 26
 };
 
 var postDataStr = querystring.stringify(postData);
 
 http.get('http://www.a.com/response.php?'+postDataStr, function(res){
     console.log('status: ' + res.statusCode);
     console.log('headers: ' + JSON.stringify(res.headers));
     var txt = '';
     res.on('data', function(chunk){
         // console.log(Buffer.isBuffer(chunk));
         // console.log(typeof chunk);
 
         txt += chunk;
     });
 
     res.on('end', function(){
         console.log(typeof txt);
         console.log(txt);
 
29         console.log(typeof JSON.parse(txt));
30         console.log(JSON.parse(txt));
31         console.log(JSON.parse(txt).name);
32         console.log(querystring.unescape(JSON.parse(txt).name));
     });
 }).on('error', function(e){
     console.log('Error: '+e.message);
 });

PHP接收端: response.php

 <?php
 
     $name = $_GET["name"] . '--返回数据';
     $age = $_GET['age'] + 100;
 
     echo json_encode(array(
             'name' => $name,
             'age' => $age,
             'address' => 'beijing'
         ));
 
 ?>

运行:

 注意:

• 　　返回的数据 是 json格式的字符串 ,因此要使用 JSON.parse() 转化为json对象.

　　

参考链接:

• nodejs: request方法