Question

我是Angular承诺的新手，并且真的想要了解它。

我有一个控制器（MainController）尝试通过myAuthSrv.authUser验证用户..简单的用户名和密码。在.success，我正在通过myCookieSrv.createCookie创建Cookie。

创建Cookie成功后我想要做的就是拨打其他服务 - myAuthSrv.validateUser

控制器：

app.controller('MainController', function($scope, $http, myCookieSrv, myAuthSrv) {

    myAuthSrv.authUser($scope.data)
        .success(function (data, status, headers, config) {
                var cookieName = 'myCookieName';
                myCookieSrv.createCookie(cookieName, Id, 1);
                    //////////////////////////////////////////////
                    //.then(console.log("call promise here!!!"))
                    //.catch(error)
                    //////////////////////////////////////////////
            }
        })
        .error(function (data, status, headers, config) {
            $scope.err = "Something has gone wrong";
        })
});

myCookieSrv ：

app.service('myCookieSrv', function() {
    return {
        createCookie : function(cookieName, Id, days) {
            if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();
            }
            else var expires = "";
            document.cookie = cookieName+"="+Id+expires+"; path=/";

        },
        readCookie : function(cookieName) {
            var nameEQ = cookieName + "=";
            var ca = document.cookie.split(';');
            for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
            }
            return null;
        }
    }
});

成功执行myCookieSrv.createCookie后，我想从validateUser致电myAuthSrv：

app.service('myAuthSrv', function($http) {
    this.authUser = function() {
        return $http({
            method: 'POST',
            url: 'some url',
            data: {},
            headers: {'Content-Type': 'application/json'}
        });
    }

    this.validateUser = function() {
        return $http({
            method: 'POST',
            url: 'some url',
            data: {},
            headers: {'Content-Type': 'application/json'}
        });
    }  
}

Answer 1

创建cookie后，您无需创建承诺。只需将控制器更改为：

app.controller('MainController', function($scope, $http, myCookieSrv, myAuthSrv) {

    myAuthSrv.authUser($scope.data)
        .then(function () {
            var cookieName = 'myCookieName';
            myCookieSrv.createCookie(cookieName, Id, 1);
        })
        .then(function () {
           return myAuthSrv.validateUser();
        })
        .then(function () {
           //success
         }, function () {
            $scope.err = "Something has gone wrong";
        })
});

Answer 2

做这样的事情

var promise = loginService
                                .logincall($scope.credentials);

                        promise
                                .then(
                                        function(payload) {
                                            //write your code (payload is the data returned)
});

Answer 3

这应该有所帮助。

app.controller('MainController', function($scope, $http, myCookieSrv, myAuthSrv) {
myAuthSrv.authUser($scope.data)
    .success(function (data, status, headers, config) {
            var cookieName = 'myCookieName';
            myCookieSrv.createCookie(cookieName, Id, 1);
                myAuthSrv.validateUser()
                .success(function(){
                    //Auth Success
                })
                .error(function(){
                    //Error in auth
                });
        }
    })
    .error(function (data, status, headers, config) {
        $scope.err = "Something has gone wrong";
    })
});

在服务调用之后创建一个简单的Angular承诺

3 个答案: