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)
parse.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.parse('http://www.baidu.com'));
};
response.statusCode = 200;
response.setHeader('Content-Type', 'text/plain;charset=utf-8');
response.end('url 模块下 parse 函数。');
});
server.listen(port, hostname, () => {
console.log(`服务器运行在 http://${hostname}:${port}`);
});
执行 node parse.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: null,
query: null,
pathname: '/',
path: '/',
href: 'http://www.baidu.com/' }
2、parse（传入参数）
parse2.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.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' }
3、parse（parse 扩展）
parse3.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') {
/*
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
