router-lxc/router/index.js

router封装 简易版

const url = require("url");
const fs = require("fs");
const path = require("path");
const qs = require("querystring")
//收集事件
const routerMap = {
    get:{},
    post:{}
}

const router = function(req,res){
    //给res添加一个json方法
    res.json = function(obj){
        res.end(JSON.stringify(obj))
    }

    //处理静态资源
    handleStatic(req,res);


    //获取用户请求的方式
    var method = req.method.toLowerCase();
    //获取用户请求的地址
    var {pathname,query} = url.parse(req.url,true);

    if(method === "get"){
        if(routerMap.get[pathname]){
            //将query的值赋值给req.query
            req.query = query;
            routerMap.get[pathname](req,res)
        }else{
            res.end("404")
        }


    }else if(method === "post"){
        if(routerMap.post[pathname]){
            var str = "";
            //获取post传递的参数
            req.on("data",(data)=>{
                str += data;
            })
            req.on("end",()=>{
                str = decodeURIComponent(str);
                console.log(str);
            //    req.body = str;
               req.body = qs.parse(str);
               routerMap.post[pathname](req,res)
            })
            
        }
    }
}

//注册事件
router.get = function(path,callback){
    routerMap.get[path] = callback;
}
//注册事件
router.post = function(path,callback){
    routerMap.post[path] = callback;
}



//处理所有的静态资源访问
function handleStatic(req,res){
    var {pathname} = url.parse(req.url,true);
    //获取文件的后缀
    var ext = pathname.substring(pathname.lastIndexOf("."));

    if(pathname ==="/"){
        res.writeHead(200,{"content-type":"text/html;charset=utf8"});
        res.end(getFile(path.join(__dirname,"../public/index.html")))
    }else if(ext === ".css"){
        res.writeHead(200,{"content-type":"text/css;charset=utf8"});
        res.end(getFile(path.join(__dirname,"../public",pathname)));
    }else if(ext === ".js"){
        res.writeHead(200,{"content-type":"application/x-javascript;charset=utf8"});
        res.end(getFile(path.join(__dirname,"../public",pathname)));

    }else if(/.*\.(jpg|png|gif)/.test(ext)){
        res.writeHead(200,{"content-type":`image/${RegExp.$1};charset=utf8`});
        res.end(getFile(path.join(__dirname,"../public",pathname)));
    }else if(ext === ".html"){
        res.writeHead(200,{"content-type":"text/html;charset=utf8"});
        res.end(getFile(path.join(__dirname,"../public",pathname)));
    }
}


function getFile(filePath){
    return fs.readFileSync(filePath);
}

module.exports = router;