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很早以前没事干搞的，来体验一下Nodejs的回调地狱

const http = require('http');const path = require('path');const fs = require('fs');const url = require('url');const formidable = require('formidable');const sd = require("silly-datetime");const server = http.createServer((request,response)=>{
   	const pathname = url.parse(request.url).pathname;	const query = url.parse(request.url,true).query; //这里加true 就和querystring.parse的效果一样了	//search 是get请求包含?的信息 比如会返回  ?a=b	//query 是 get请求的信息，和search的区别是 search 是包含了?和& 但是上面的代码我加了true 等于他会解析成类似dictionary的内容	//path url 除了域名端口所有信息	//href 目前没发现和path有什么区别	//console.log(pathname,query)					//下面详细区分mime	var resType = "application/octet-stream;"; //默认的		const extension = path.extname(pathname); //获取扩展文件名	// 就写这么多 有兴趣可以从任意一个web容器mime里拷出来	const mimeType = {
   		".html":"text/html;charset=utf-8;", 		".htm":"text/html;charset=utf-8;",		".jpg":"image/jpeg;",		".jpeg":"image/jpeg;",		".png":"image/png;",		".gif":"image/gif;",		".ico":"image/vnd.microsoft.icon;",		".txt":"text/plain;charset=utf-8;",		".json":"application/json;",		".mp4":"video/mp4;",		".ogg":"video/ogg;",		".js":"application/x-javascript;charset=utf-8;",		".mjs":"application/x-javascript;charset=utf-8;",		".css":"text/css;charset=utf-8;"	};		if (Object.keys(mimeType).indexOf(extension)>-1){
   		resType = mimeType[extension];	}		console.log(pathname+"   "+request.url+"  "+request.method);		if (pathname=='/'){
   		fs.readFile("./result.html",function(err,data){
   			if (err){
   				response.writeHead(404,{
   "Content-type": "text/html;charset=utf-8;"});				response.end('
404 Not Found
');				return false;			}            response.writeHead(200, {
   'content-type': 'text/html;charset=utf-8;'});            response.end(data);        })	}else if(pathname=='/favicon.ico'){
   		response.writeHead(200,{
   "Content-type": resType});		fs.readFile("./favicon.ico",(err,data)=>{
   			if (err){
   				response.end();				return false;			}			response.write(data);			response.end();					});			}else if(pathname == "/upload" && request.method == "POST"){
   				var form = new formidable.IncomingForm();        //设置文件上传存放地址        form.uploadDir = "./uploads";        //执行里面的回调函数的时候，表单已经全部接收完毕了。        form.parse(request, function(err, fields, files) {
   			//console.log(fields)            var fileTime = sd.format(new Date(), 'YYYYMMDDHHmmss');            var ran = parseInt(Math.random() * 89999 + 10000);            var extname = path.extname(files.upload.name);            //执行改名            var oldpath = __dirname + "/" + files.upload.path;            //新的路径由三个部分组成：时间戳、随机数、拓展名            var newpath = __dirname + "/uploads/" + fileTime + ran + extname;            //改名            fs.rename(oldpath,newpath,function(err){
                   if(err){
                       throw Error("改名失败");                }                response.writeHead(200, {
   'content-type': 'text/plain'});                response.end("成功");            });        });			}else{
   		// 扩展名限制		if (extension && Object.keys(mimeType).indexOf(extension)<0){
   			response.writeHead(403,{
   "Content-type": "text/html;charset=utf-8;"});			response.end(`
禁止访问 ${
     extension} 扩展名文件
`);			return false;		}					fs.stat(path.join(__dirname,pathname),(err,stats)=>{
   			if (err){
   				response.writeHead(404,{
   "Content-type": "text/html;charset=utf-8;"});				response.end('
404 Not Found
');				return false;			}			fs.readFile(path.join(__dirname,pathname),(err,data)=>{
   				if (err){
   					response.writeHead(403,{
   "Content-type": "text/html;charset=utf-8;"});					response.end('
403 Forbidden
');					return false;				}				/* 这样是优先判断文件是否存在，存在且访问不存在扩展名才会触发，可能会造成人家用来判断文件是否存在的特征				if (Object.keys(mimeType).indexOf(extension)<0){					response.writeHead(403,{"Content-type": "text/html;charset=utf-8;"});					response.end(`
禁止访问 ${extension} 扩展名文件
`);					return false;				}					*/				response.writeHead(200,{
   "Content-type": resType});				response.write(data);				response.end();							});					});			}});server.listen(2080,(error)=>{
   	if (error) throw error;	console.log('成功启动web服务,端口:2080');});

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