http模块

 1 const http = require('http');
 2 
 3 let server = http.createServer((req, res)=>{
 4     res.end('hello, world!');
 5 });
 6 
 7 server.listen(3000, '127.0.0.1', ()=>{
 8     console.log('服务器已经启动!');
 9     // 5秒后关闭服务器
10     setTimeout(()=>{
11         // server.close();
12     }, 5000);
13 });
14 
15 // 监听服务器的关闭
16 server.on('close', ()=>{
17     console.log('服务器已经关闭!');
18 });
19 
20 // 监听服务器发生错误
21 server.on('error', (e)=>{
22     if(e.code === 'EADDRINUSE'){
23         console.log('端口号被调用!');
24     }else {
25         console.log('其它的错误', e.code);
26     }
27 });
28 
29 // 设置超时时间
30 server.setTimeout(1000, ()=>{
31     console.log('设置超时时间为1s');
32 });
33 
34 server.on('timeout', ()=>{
35     // 超时要做什么操作
36     console.log('连接已经超时');
37 });

 1 let http = require('http');
 2 let fs = require('fs');
 3 let path = require('path');
 4 
 5 http.createServer((req, res)=>{
 6     console.log(path.join(__dirname, 'request.log'));
 7     console.log(req);
 8     // 输出request.log文件
 9     let out = fs.createWriteStream(path.join(__dirname, 'request.log'));
10     out.write('1) method:' + req.method + '
');
11     out.write('2) url:' + req.url + '
');
12     out.write('3) headers:' + JSON.stringify(req.headers) + '
');
13     out.write('4) httpVersion:' + req.httpVersion + '
');
14 }).listen(8080, '127.0.0.1');

1 1) method:GET
2 2) url:/
3 3) headers:{"host":"localhost:8080","connection":"keep-alive","cache-control":"max-age=0",
　　　　"upgrade-insecure-requests":"1","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) 
　　　　Chrome/75.0.3770.100 Safari/537.36","accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;
　　　　q=0.8,application/signed-exchange;v=b3","accept-encoding":"gzip, deflate, br","accept-language":"zh-CN,zh;q=0.9,en;q=0.8,lb;
　　　　q=0.7","cookie":"_nano_fp=XpdYn5CjX0UJnpTJXC_ALVUQMlgQwrkHd5Az6sJb"}
4 4) httpVersion:1.1

 1 // 方式1
 2 
 3 const url = require('url');
 4 // 把字符串转成URL对象
 5 const myURL = url.parse( 'https://user:pass@sub.itLike.com:8080/p/a/t/h?query=string#hash');
 6 console.log(myURL);
 7 
 8 
 9 const myURL = new URL('https://user:pass@sub.itLike.com:8080/p/a/t/h?query=string#hash');
10 console.log(myURL);

 1 URL {
 2   href:
 3    'https://user:pass@sub.itlike.com:8080/p/a/t/h?query=string#hash',
 4   origin: 'https://sub.itlike.com:8080',
 5   protocol: 'https:',
 6   username: 'user',
 7   password: 'pass',
 8   host: 'sub.itlike.com:8080',
 9   hostname: 'sub.itlike.com',
10   port: '8080',
11   pathname: '/p/a/t/h',
12   search: '?query=string',
13   searchParams: URLSearchParams { 'query' => 'string' },
14   hash: '#hash' 
15 }

 1 const http = require('http');
 2 
 3 http.createServer((req, res)=>{
 4      console.log(res.headersSent ? '响应头已经发送' : '响应头未发送');
 5      // 设置隐式响应头
 6      res.setHeader('Content-Type', 'text/html;charset=utf-8');
 7      res.writeHead(200, 'ok');
 8      res.write('<h1>Hello, ItLike</h1>');
 9      res.write('<h1>Hello, ItLike</h1>');
10      res.write('<h1>Hello, ItLike</h1>');
11      res.write('<h1>Hello, ItLike</h1>');
12      // 本次响应结束
13      res.end('<h1>撩课学院</h1>');
14      console.log(res.headersSent ? '响应头已经发送' : '响应头未发送');
15 }).listen(3000, '127.0.0.1', ()=>{
16     console.log('服务器已经启动~')
17 });