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