node.js写服务器

// 引入内置模块

var http = require("http");
var fs = require("fs");
var url = require("url");
var path = require('path');
var querystring = require("querystring");

var server = http.createServer();

server.on("request",function(req,res){



     //url路由转换
     var urlObj = url.parse(req.url,true);
     console.log(req.url)
     //路径名
     var pathname = urlObj.pathname;
     console.log(pathname);
     //路径携带的参数
     var query = urlObj.query;
     // var extname = path.extname(req.url);
     // console.log(extname);
     // console.log(pathname);

     //静态伺服

    if(pathname == "/register.html" && req.method == "GET"){
        console.log("1111");
        fs.readFile("./register.html","utf8",function(err,data){
            res.end(data);
        })
    }
    else if(pathname == "/jquery-1.11.3.min.js" && req.method == "GET"){
        fs.readFile("./jquery-1.11.3.min.js","utf8",function(err,data){
            res.end(data);
        })
    }
    else if(pathname == "/login.html" && req.method == "GET"){
        fs.readFile("./login.html","utf8",function(err,data){
            res.end(data);
        })
    }
    else if(pathname == "/shouye.html" && req.method == "GET"){
        fs.readFile("./shouye.html","utf8",function(err,data){
            res.end(data);
        })
    }
    //注册用户名失焦验证
    else if(pathname == "/register_blur" && req.method == "GET"){
         fs.readFile("./login.json","utf8",function(err,data){
             //将文件中存在的用户以json字符串格式转化成json对象
             data = JSON.parse(data);
             var flag = true;
            for(var i = 0;i<data.length;i++){
                //判断文件中是否存在注册的用户名，一旦找到一个存在的uname则停止寻找，返回结果
                if(data[i].uname == query.uname){
                    flag = false;
                    break;
                }
            }
            if(flag){
                res.end("1")
            }else{
                res.end("0")
            }
         })
     }
     //登录时用户名失焦验证
     else if(pathname == "/login_blur" && req.method == "GET"){
        fs.readFile("./login.json","utf8",function(err,data){
            //将文件中存在的用户以json字符串格式转化成json对象
            data = JSON.parse(data);
            var flag = true;
            for(var i = 0;i<data.length;i++){
                //判断文件中是否存在注册的用户名，一旦找到一个存在的uname则停止寻找，返回结果
                if(data[i].uname == query.uname){
                    flag = false;
                    break;
                }
            }
            if(flag){
                res.end("1")
            }else{
                res.end("0")
            }
        })
     }


    //登录验证
    else if(pathname == "/login" && req.method == "POST"){
        var pathData = "";
        req.on("data", function(chunk){
            pathData += chunk;
            // console.log(pathData)
        })
        req.on("end",function(){
            var pathObj = querystring.parse(pathData);
            console.log(pathObj);
            if(pathObj.uname && pathObj.upassword){
                fs.readFile("./login.json","utf8",function(err,data){
                    data = JSON.parse(data);
                    var flag = false;
                    for(var i = 0; i < data.length; i++){
                        if(data[i].uname == pathObj.uname && data[i].upassword == pathObj.upassword){
                            flag = true;
                            break;
                        }
                    }
                    if(flag){
                        //成功
                        res.end("1");
                    }else{
                        //用户名或密码错误
                        res.end("2");
                    }
                })
            }else{
                //参数错误
                res.end("0");
            }
        })
    }
    //注册验证
     else if(pathname == "/register" && req.method == "POST"){
        var pathData = "";
        req.on("data", function(chunk){
            pathData += chunk;
            // console.log(pathData)
        })
        req.on("end",function(){
            var pathObj = querystring.parse(pathData);
            // console.log(pathObj);
            if(pathObj.uname && pathObj.upassword){
                fs.readFile("./login.json","utf8",function(err,data){
                    data = JSON.parse(data);
                    data.push(pathObj);
                    var data_str = JSON.stringify(data);
                    fs.writeFile("./login.json",data_str,"utf8",function(err){
                        res.end("1")
                    })
                })
            }else{
                //参数错误
                res.end("0");
            }
        })
     }


     //首页获取数据
     else if(pathname == "/index_getdata" && req.method == "GET"){
        var uname = query.uname;
        fs.access('./data/' + uname + ".json",function(err){
            if(err){
                fs.writeFile('./data/' + uname + ".json",'[]',function(err){
                    fs.readFile('./data/' + uname + ".json",'utf8',function(err,data){
                        var queryData = "{'message':'OK','data':" + data + '}' 
                        res.end(queryData);
                    })
                })
            }else{
                fs.readFile('./data/' + uname + ".json","utf8",function(err,data){
                    var queryData = "{'message':'OK','data':" + data + '}' 
                    res.end(queryData);
                })
            }
        })
    }

    //添加数据
    else if(pathname == "/add_data" && req.method == "POST"){
        var pathData = '';
        req.on('data', function(chunk){
            pathData += chunk;
        });
        req.on('end', function(){
            var pathObj = querystring.parse(pathData);
            var uname = pathObj.uname;
            fs.readFile('./data/' + uname + ".json",'utf8',function(err,data){
                var data = JSON.parse(data);
                if(data.length == 0){
                    var obj = {
                        pid : 0,
                        name: pathObj.name,
                        sex : pathObj.sex,
                        age : pathObj.age,
                        mail : pathObj.mail,
                        phone : pathObj.phone
                    }
                    data.push(obj);
                    var str = JSON.stringify(data);
                    fs.writeFile('./data/' + uname + ".json",str,function(err){
                        res.end('1');
                    })
                }else{
                    var obj = {
                        pid : data[data.length-1].pid + 1,
                        name: pathObj.name,
                        sex : pathObj.sex,
                        age : pathObj.age,
                        mail : pathObj.mail,
                        phone : pathObj.phone
                    }
                    data.push(obj);
                    var str = JSON.stringify(data);
                    fs.writeFile('./data/' + uname + ".json",str,function(err){
                        res.end('1');
                    })
                }
            })
        });
    }
    //删除数据
    else if(pathname == "/remove_data" && req.method == "GET"){
        var uname = query.uname;
        var pid = query.pid;
        fs.readFile('./data/' + uname + ".json",'utf8',function(err,data){
            var data = JSON.parse(data);
            for(var i = 0;i < data.length;i++){
                if(data[i].pid == pid){
                    break;
                }
            }
            data.splice(i,1);
            var str = JSON.stringify(data)
            fs.writeFile('./data/' + uname + ".json",str,function(err){
                res.end("1");
            })
        })
    }
    
    //修改数据
    else if(pathname == "/modify_data" && req.method == "POST"){
        var pathData = '';
        req.on('data', function(chunk){
            pathData += chunk;
        });
        req.on('end', function(){
            var pathObj = querystring.parse(pathData);
            var uname = pathObj.uname;
            var pid = pathObj.pid;
            fs.readFile('./data/' + uname + ".json",'utf8',function(err,data){
                var data = JSON.parse(data);
                for(var i = 0;i < data.length;i++){
                    if(data[i].pid == pid){
                        break;
                    }
                }
                if(pathObj.name){
                    data[i].name = pathObj.name
                }
                if(pathObj.sex){
                    data[i].sex = pathObj.sex
                }
                if(pathObj.age){
                    data[i].age = pathObj.age
                }
                if(pathObj.mail){
                    data[i].mail = pathObj.mail
                }
                if(pathObj.phone){
                    data[i].phone = pathObj.phone
                }
                var str = JSON.stringify(data);
                fs.writeFile('./data/' + uname + ".json",str,function(err){
                    res.end("1");
                })
            })
        })
    }


})

server.listen(3808);
console.log("服务器3808正在运行")