[TOC] ## http 模块 demo ``` //main.js var http = require('http'); http.createServer(function (request, response) { response.writeHead(200, { 'Content-Type': 'text-plain' }); response.end('Hello World\n'); }).listen(8124); ``` `> node main.js ` 通过`http://loalhost:8124`访问 > 在Linux系统下，监听1024以下端口需要root权限。因此，如果想监听80或443端口的话，需要使用sudo命令启动程序。 ### 客户端访问 1. post ``` var http = require("http"); var options = { hostname: 'www.example.com', port: 80, path: '/upload', method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' } }; var request = http.request(options, function (response) { console.log(response); }); request.write('Hello World'); request.end(); ``` 2. get `http.get('http://www.example.com/', function (response) {});` ``` var http = require("http"); http.get('http://localhost:8124/', function (response) { var body = []; console.log(response.statusCode); //200 console.log(response.headers); //打印头信息 response.on('data', function (chunk) { body.push(chunk); }); response.on('end', function () { body = Buffer.concat(body); console.log(body.toString()); //网址返回内容 }); }); ``` ## HTTPS 模块 1. 创建https 的服务器 ``` var options = { key: fs.readFileSync('./ssl/default.key'), cert: fs.readFileSync('./ssl/default.cer') }; var server = https.createServer(options, function (request, response) { // ... }); ``` 2. 客户端 访问https ``` var options = { hostname: 'www.example.com', port: 443, path: '/', method: 'GET', rejectUnauthorized:false //可是非颁发机构 颁发的 证书安全问题 不进行提示 }; var request = https.request(options, function (response) {}); request.end(); ``` ## URL 模块 1.` url.parse` 把url 字符串转为对象 ``` url.parse('http://user:pass@host.com:8080/p/a/t/h?query=string#hash'); /* => { protocol: 'http:', auth: 'user:pass', host: 'host.com:8080', port: '8080', hostname: 'host.com', hash: '#hash', search: '?query=string', query: 'query=string', pathname: '/p/a/t/h', path: '/p/a/t/h?query=string', href: 'http://user:pass@host.com:8080/p/a/t/h?query=string#hash' } */ ``` `.parse` 第二个参数为true 则`query`字段转为对象 2. `url.format` 把url对象转为url字符串 ``` url.format({ protocol: 'http:', host: 'www.example.com', pathname: '/p/a/t/h', search: 'query=string' }); //http://www.example.com/p/a/t/h?query=string ``` 3. `url.resolve` ```js url.resolve('http://www.example.com/foo/bar', '../baz'); //http://www.example.com/baz ``` ## Query String 模块 ```js querystring.parse('foo=bar&baz=qux&baz=quux&corge'); //{ foo: 'bar', baz: ['qux', 'quux'], corge: '' } querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' }); //'foo=bar&baz=qux&baz=quux&corge=' ``` ## zlib > [参考](http://nqdeng.github.io/7-days-nodejs/#4.2.5) zlib模块提供了数据压缩和解压的功能。当我们处理HTTP请求和响应时，可能需要用到这个模块。 ## Net