利用 http 模塊開始寫簡單的web服務。

模塊：

const http=require('http'); const fs=require('fs'); const path=require('path');function startServer() {let onRequest=function (req,res) {console.log('recived a request.');res.writeHead(200,{'Content-Type':'text/html'});let wwwdir= path.resolve(__dirname,'../www');// console.log(wwwdir);let readStream = fs.createReadStream(wwwdir+'/bbb.html');readStream.pipe(res);};let server=http.createServer(onRequest);server.listen(80,'192.168.1.101'); };exports.startServer = startServer;

調用者，APP，使用兩行就開啟了一個簡單的web服務。

let server=require('./mod_server');server.startServer();

?

單文件版路由，響應了幾個不同的頁面：

const http = require('http'); const fs = require('fs'); const path = require('path');let wwwdir = path.resolve(__dirname, '../www');let onRequest = function (req, res) {console.log('recived a request. ' + req.url);if (req.url === '/' || req.url === '/home') {res.writeHead(200, {'Content-Type': 'text/html;charset=UTF-8'});let readStream = fs.createReadStream(wwwdir + '/index.html');readStream.pipe(res);} else if (req.url === '/about') {res.writeHead(200, {'Content-Type': 'text/html;charset=UTF-8'});let readStream = fs.createReadStream(wwwdir + '/about.html');readStream.pipe(res);} else if (req.url === '/api') {res.writeHead(200, {'Content-Type': 'application/json'});let jsonObj = {name: "alex",email: 'abc@gg.com',age: 32};// console.log(JSON.parse(jsonStr)); // 反序列化res.end(JSON.stringify(jsonObj));} else {res.writeHead(404, {'Content-Type': "text/html;charset=utf8"});res.write('抱歉 404 ,你要的頁面沒找到.');}; };let server = http.createServer(onRequest); server.listen(8001, 'localhost');

?

分開為獨立文件的 web server

一、server.js

const http = require('http');function startServer(route, handle) {let onRequest = function (request, response) {console.log('Request received ' + request.url);// 傳遞到 route 函數 route(handle, request.url, response);};let server = http.createServer(onRequest);server.listen(8001, '127.0.0.1');console.log('Server started on 127.0.0.1:8001'); }module.exports.startServer = startServer;

二、router.js

const fs = require('fs'); const path = require('path');let wwwdir = path.resolve(__dirname, '../www');function route(handle, pathname, response) {console.log('Routing a request for ' + pathname);// 判斷 handle中是否有對應的 pathname 函數if (typeof handle[pathname] === 'function') {handle[pathname](response); // response作為參數傳遞到 handle 函數} else {response.writeHead(404, {'Content-Type': 'text/html'});fs.createReadStream(wwwdir + '/404.html', 'utf8').pipe(response);} }module.exports.route = route;

三、handler.js

const fs = require('fs'); const path = require('path');let wwwdir = path.resolve(__dirname, '../www');function home(response) {response.writeHead(200, {'Content-Type': 'text/html'});fs.createReadStream(wwwdir + '/index.html', 'utf8').pipe(response); }function review(response) {response.writeHead(200, {'Content-Type': 'text/html'});fs.createReadStream(wwwdir + '/about.html', 'utf8').pipe(response); }function api_records(response) {response.writeHead(200, {'Content-Type': 'application/json'});let jsonObj = {name: "Alex",passwd: "123456",email: 'aaa@cc.com',age: 22};response.end(JSON.stringify(jsonObj)); }module.exports = {home: home,review: review,api: api_records };

四、app.js 主程序，模塊方式調用前面的三個文件即可

const server = require('./server'); const router = require('./router'); const handler = require('./handler'); let handle = {}; handle["/"] = handler.home; handle['/home'] = handler.home; handle['/review'] = handler.review; handle['/api'] = handler.api; server.startServer(router.route, handle);

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轉載于:https://www.cnblogs.com/frx9527/p/nodejs2.html

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