封装路由

1.路由的封装

const fs = require('fs');
const path = require('path');
const url = require('url');
const ejs = require('ejs');

// 私有方法
let getMime = (extName) => {
    let data = fs.readFileSync('./data/mime.json');
    let mimeObj = JSON.parse(data.toString());
    return mimeObj[extName];
}
// 封装路由
let app = {
    static(req, res, staticPath) {
        //获取url中的路径(pathname)
        let pathname = url.parse(req.url).pathname;
        // 获取路径中的后缀名
        let extName = path.extname(pathname);
        pathname = pathname == '/' ? '/index.html' : pathname;

        // 获得正确的路径
        if (pathname != '/favicon.ico') {
            try {
                // 读取对应文件夹下的文件并传给浏览器
                let data = fs.readFileSync('./' + staticPath + pathname);
                if (data) {
                    // 获取对应后缀名的响应头
                    let mimeName = getMime(extName);
                    res.writeHead(200, { 'Content-Type': '' + mimeName + ';charset=utf-8' });
                    res.end(data);
                }
            } catch (error) {
            }
        }
    },
    login(req,res){
        res.end("login");
    },
    news(req,res){
        res.end("news");
    },
    form(req,res){
        ejs.renderFile('./views/form.ejs',{},(err,data)=>{
            res.writeHead(200,{'Content-Type':'text/html,charset="utf-8"'});
            res.end(data);
        })
    },
    doLogin(req,res){
        let postData = '';
        req.on('data',(chunk)=>{
            postData += chunk;
        })
        req.on('end',()=>{
            console.log(postData);
            res.end(postData);
        })
    },
    error(req,res){
        res.end("error");
    }
}
module.exports = app;

2.使用

const http = require('http');
const routes = require('./module/routes');
const url = require('url');

http.createServer((req,res)=>{
    // 创建静态web服务
    routes.static(req,res,'state');
    // 获取请求类型
    // console.log(req.method);
    // 路由
    let pathname = url.parse(req.url).pathname.replace("/","");

    try {
        routes[pathname](req,res);
    } catch (error) {
        routes['error'](req,res);
    }


}).listen(8080);
console.log("http://127.0.0.1:8080");