一、http 模块
http.js
const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((request, response) => { response.statusCode = 200; response.setHeader('Content-Type', 'text/plain;charset=utf-8'); response.end('http 模块。'); }); server.listen(port, hostname, () => { console.log(`服务器运行在 http://${hostname}:${port}`); });
执行 node http.js,访问:127.0.0.1:3000/
二、url 模块
url.js
const url = require('url'); const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((request, response) => { // 过滤掉 request.url == '/favicon.ico' 的情况,否则会打印两次结果 if (request.url != '/favicon.ico') { console.log(url); }; response.statusCode = 200; response.setHeader('Content-Type', 'text/plain;charset=utf-8'); response.end('url 模块。'); }); server.listen(port, hostname, () => { console.log(`服务器运行在 http://${hostname}:${port}`); });
执行 node url.js,访问:127.0.0.1:3000/
{ parse: [Function: urlParse], resolve: [Function: urlResolve], resolveObject: [Function: urlResolveObject], format: [Function: urlFormat], URL: { [Function: URL] originFor: [Function], domainToASCII: [Function], domainToUnicode: [Function] }, Url: [Function: Url] }
2.1 url 模块下 parse 函数
1、parse(获取地址信息)
const url = require('url'); const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((request, response) => { if (request.url != '/favicon.ico') { console.log(url.parse('http://www.baidu.com?name=liu')); }; response.statusCode = 200; response.setHeader('Content-Type', 'text/plain;charset=utf-8'); response.end('url 模块下 parse 函数(传入参数)。'); }); server.listen(port, hostname, () => { console.log(`服务器运行在 http://${hostname}:${port}`); });
执行 node parse2.js,访问:127.0.0.1:3000/
Url { protocol: 'http:', slashes: true, auth: null, host: 'www.baidu.com', port: null, hostname: 'www.baidu.com', hash: null, search: '?name=liu', query: 'name=liu', pathname: '/', path: '/?name=liu', href: 'http://www.baidu.com/?name=liu' }
2、parse(parse 扩展)
const url = require('url'); const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((request, response) => { if (request.url != '/favicon.ico') { /* parse 方法可以传两个参数: 第一个参数是地址。 第二个参数是 true 的话表示把 get 传值转换成对象。 */ const result = url.parse(request.url, true); console.log(result); console.log(result.query.userName); console.log(result.query.userAge); }; response.statusCode = 200; response.setHeader('Content-Type', 'text/plain;charset=utf-8'); response.end('url 模块下 parse 函数(parse 扩展)。'); }); server.listen(port, hostname, () => { console.log(`服务器运行在 http://${hostname}:${port}`); });
执行 node parse3.js,访问:127.0.0.1:3000/?userName=liu&userAge=24
Url { protocol: null, slashes: null, auth: null, host: null, port: null, hostname: null, hash: null, search: '?userName=liu&userAge=24', query: { userName: 'liu', userAge: '24' }, pathname: '/', path: '/?userName=liu&userAge=24', href: '/?userName=liu&userAge=24' } liu 24
2.2 url 模块下 format 函数
format: 逆向 parse。
format.js
const url = require('url');
const http = require('http');
const hostname = '127.0.0.1';
const port = 3000;
const server = http.createServer((request, response) => {
if (request.url != '/favicon.ico') {
console.log(url.format({
protocol: null,
slashes: null,
auth: null,
host: null,
port: null,
hostname: null,
hash: null,
search: '?userName=liu&userAge=24',
query: {
userName: 'liu',
userAge: '24'
},
pathname: '/',
path: '/?userName=liu&userAge=24',
href: '/?userName=liu&userAge=24'
}));
};
response.statusCode = 200;
response.setHeader('Content-Type', 'text/plain;charset=utf-8');
response.end('url 模块下 format 函数。');
});
server.listen(port, hostname, () => {
console.log(`服务器运行在 http://${hostname}:${port}`);
});
执行 node format.js,访问:127.0.0.1:3000/
/?userName=liu&userAge=24
2.3 url 模块下 resolve 函数
resolve: 追加或替换地址。
resolve.js
const url = require('url');
const http = require('http');
const hostname = '127.0.0.1';
const port = 3000;
const server = http.createServer((request, response) => {
if (request.url != '/favicon.ico') {
console.log(url.resolve('127.0.0.1:3000/?userName=liu&userAge=24', 'userName=zhao'));
};
response.statusCode = 200;
response.setHeader('Content-Type', 'text/plain;charset=utf-8');
response.end('url 模块下 resolve 函数。');
});
server.listen(port, hostname, () => {
console.log(`服务器运行在 http://${hostname}:${port}`);
});
执行 node resolve.js,访问:127.0.0.1:3000/
127.0.0.1:3000/userName=zhao