利用 http 模块开始写简单的web服务。
模块：
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;
调用者，APP，使用两行就开启了一个简单的web服务。
let server=require('./mod_server');
server.startServer();
单文件版路由，响应了几个不同的页面：
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 ,你要的页面没找到.');
}
;
};
let server = http.createServer(onRequest);
server.listen(8001, 'localhost');
分开为独立文件的 web server
一、server.js
const http = require('http');
function startServer(route, handle) {
let onRequest = function (request, response) {
console.log('Request received ' + request.url);
// 传递到 route 函数
route(handle, request.url, response);
};
let server = http.createServer(onRequest);
server.listen(, '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);
// 判断 handle中是否有对应的 pathname 函数
if (typeof handle[pathname] === 'function') {
handle[pathname](response); // response作为参数传递到 handle 函数
} else {
response.writeHead(, {'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(, {'Content-Type': 'text/html'});
fs.createReadStream(wwwdir + '/index.html', 'utf8').pipe(response);
}
function review(response) {
response.writeHead(, {'Content-Type': 'text/html'});
fs.createReadStream(wwwdir + '/about.html', 'utf8').pipe(response);
}
function api_records(response) {
response.writeHead(, {'Content-Type': 'application/json'});
let jsonObj = {
name: "Alex",
passwd: "",
email: 'aaa@cc.com',
age:
};
response.end(JSON.stringify(jsonObj));
}
module.exports = {
home: home,
review: review,
api: api_records
};
四、app.js 主程序，模块方式调用前面的三个文件即可
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);