今天为昨天写的登陆注册页面增加了前端和后端逻辑，后端采用express，前端则是angularJS，数据库使用mongodb，没有加缓存层。

• Angular的服务部分

var Services=angular.module('myApp.Services',[]);

Services.factory('checkUser',function(){
    //检查用户登陆和注册时填写的格式
    function checkUserName(str, minLen, maxLen) {
        var reg = /^[(\u4e00-\u9fa5)a-z][(\u4e00-\u9fa5)a-zA-Z0-9_]{1,15}$/;
        var len = str.length;
        return reg.test(str) && len >= minLen && len <= maxLen;
    }

    function checkEmail(str) {
        var reg = /^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!\.)){0,61}[a-zA-Z0-9]?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9\-](?!$)){0,61}[a-zA-Z0-9]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/;
        return reg.test(str) && str.length >= 6 && str.length <= 64;
    }

    return function(form,option) {
        if(!form.username) return '用户名缺省';
        if(!form.password) return '密码缺省';
        if(!checkUserName(form.username, 4, 8)) return '用户名格式有误';
        if(!checkUserName(form.password,6,15)) return '密码格式有误';
        if(option=='signup'){
            if(!form.email) return 'Email缺省';
            if(!form.repeatPassword) return '重复密码缺省';
            if(!checkEmail(form.email)) return 'Email格式错误';
            if(form.password!==form.repeatPassword) return '密码不一致';
        }
        return null;
    };
}).factory('extend',function(){
//简单深度复制对象
    return function(dst,src){
        for(var i in src){
            dst[i]= typeof src[i]==='object'?cloneObject(src[i]):src[i];
        }
    };
}).factory('CryptoJS',function(){
//加密模块
    return window.CryptoJS;
});

• Angular的控制器部分

Controllers.controller('SignCtrl',function($scope,$http,$window,extend,CryptoJS,checkUser){
    $scope.regForm={};
    $scope.logForm={};
    $scope.msg='';
    $scope.appear=false;
    $scope.signup=function(){
        var err=checkUser($scope.regForm,'signup');
        if(err){
            $scope.msg=err;
            $scope.appear=true;
        }
        else{
            var tmp={};
            extend(tmp,$scope.regForm);
            tmp.password=CryptoJS.SHA256(tmp.password).toString();
            tmp.password=CryptoJS.HmacSHA256(tmp.password,'ustc').toString();
            delete tmp.repeatPassword;
          //  console.log($scope.regForm);
           // console.log(tmp);
            $http.post('/signup',tmp).success(function(data){
                if(data.err){
                    console.log(data.err.message);
                    $scope.msg=data.err.message;
                    $scope.appear=true;//使alert展现
                }
                else{
                    $scope.msg='注册成功，请登陆';
                    $scope.appear=true;
                    $scope.logForm.username=$scope.regForm.username;
                    $scope.logForm.password=$scope.regForm.password;
                    //自动填充登陆框
                }
            }).error(function(data){
                $scope.msg='未知错误，请重试';
                $scope.appear=true;
            });
        }
    };
    $scope.signin=function(){
        var err=checkUser($scope.logForm,'signin');
        if(err){
            $scope.msg=err;
            $scope.appear=true;
        }
        else{
            var tmp={};
            extend(tmp,$scope.logForm);
            tmp.password=CryptoJS.SHA256(tmp.password).toString();
            tmp.password=CryptoJS.HmacSHA256(tmp.password,'ustc').toString();
            $http.post('/signin',tmp).success(function(data){
                console.log(data);
                if(data.err){
                    console.log(data.err.message);
                    $scope.msg=data.err.message;
                    $scope.appear=true;
                }
                else{
                    $window.location.href='/';
                }
            }).error(function(data){
                $scope.msg='未知错误，请重试';
                $scope.appear=true;
            });
        }
    };
});

• 后端部分

function signup(req,res){
    var tmp=req.body.password;
    req.body.password=tool.MD5(tmp);
    //addUser负责与数据库交互，会检查用户名和电子邮件是否重复
    userDB.addUser(req.body).then(function(cont,user){
        res.json({
            success:true,
            err:null
        });
    }).fail(function(cont,err){
        res.json({
            success:false,
            err:err
        });
    });
}

function signin(req,res){
  var tmp=req.body.password;
  var uob=req.body;
  uob.password=tool.MD5(tmp);
  Then(function(cont){
    User.findOne({username:uob.username},cont);
  }).then(function(cont,doc){
      if(!doc) return cont(new Err(msg.USER.userNone));
      if(doc.password!==uob.password) return cont(new Err(msg.USER.userPasswd));
      req.session.uname=doc.username;
      res.cookie('user',{
          username:doc.username,
          password:tmp,
          email:doc.email
      },{
          signed:true,
          maxAge:900000
      });
      res.json({
          success:true,
          err:null
      });
  }).fail(function(cont,err){
      console.log(err);
      res.json({
          success:false,
          err:err
      });
  });
}

• 数据库部分

function addUser(userobj){
    return Then(function(cont){
        User.findOne({username:userobj.username},cont);
    }).then(function(cont,doc){
        if(doc) return cont(new Err(msg.USER.userNameExist));
        else User.findOne({email:userobj.email},cont);
    }).then(function(cont,doc){
        if(doc) return cont(new Err(msg.USER.userEmailExist));
        else  (new User(userobj)).save(cont);
    }).fail(errorhandler);
}