通过改换维护服务角 [英] Maintain Angular Service through page change

问题描述

我使用在后端的前端和Java Servlets角度建立一个门户网站。的页面开始以登录页面，这需要输入，并将其发送给servlet。服务器验证，并与具有用户名和他的权限的JSON对象响应。我设置的值向其中注入控制器服务。然后，我用 $ windows.location 到网页更改到主页这是仪表板。现在，我想在主页的控制器使用这项服务。但我不能够保持在 $范围由于页面的变化。

I am creating a web portal using Angular on the front end and Java Servlets in the back end. The page starts with a login page, It takes the input and sends it to the servlet. The server validates and responds with a JSON object which has the username and his permissions. I set the values to a Service which is injected into the Controller. Then I use $windows.location to change the web page to the home page which is the dashboard. Now I want to use this Service in the controller of the homepage. But I am not able to maintain the $scope due to the page change.

所以我想用的Response.Redirect重定向到主页在后端的（）。但我不知道如何重定向后得到网页的用户详细信息。就像我怎么通过用户对象的 Home.java 的servlet

So I thought of redirecting to the home page in the backend using response.redirect() . But I don't know how to get the user details in the homepage after redirection. Like how do I pass the User object to the Home.java servlet

这是我的LoginCtrl.js

This is my LoginCtrl.js

if (isValid) {
            $http({
                method : 'POST',
                url : 'login',
                data : JSON.stringify($scope.user),
                headers : {
                    'Content-Type' : 'application/json'
                }
            }).success(function(data) {
                if (!("failure" == data)) {
                    console.log(data);
                    var user = {};
                    user.name = data.name;
                    user.permissions = data.permissions;
                    MyService.setUser(user); // set the values for user

                    $window.location.href = 'main.jsp';
                } else {
                    $scope.information = "Invalid username/password!"
                }
            }).error(function(data) {
                console.log(data);
            });

这是我的Login.java的servlet

This is my Login.java servlet

protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        Gson gson = new Gson();
        JsonParser parser = new JsonParser();
        JsonObject obj = (JsonObject) parser.parse(request.getReader());

        String username = "";
        String password = "";

        if (obj.get("name") != null & obj.get("password") != null) {
            username = obj.get("name").getAsString();
            password = obj.get("password").getAsString();
        }

        System.out.println("Username :" + username);
        System.out.println("Password :" + password);

        // Passing username and password to Context and validate.
        // If authentication successful, set user object with details and return
        // it
        // User user = (User) Context.Authorized(username,password)

        // for testing
        User user = new User();
        user.setName(username);
        user.setPermission("crwd");
        user.setAuthorized(true);

        response.setContentType("text/html");
        if (user.getAthorized()) {
            String responseJSON = gson.toJson(user);
            response.getWriter().write(responseJSON);
        } else {
            response.getWriter().write("failure");
        }
    }

请告诉我，如果我的要求可在角来实现，或者也可以使用Java来完成，那么如何？

Please tell me if my requirement can be achieved in Angular or if it can be done using Java, then how ?

推荐答案

如果您重定向到另一个页面，就会有完全不同的角度的应用程序，你将失去服务状态。

If you redirect to another page, there will be completely different Angular application, and you will lose service state.

• 您可以让单页应用程序，并使用$ routeProvider和NG-视图为登录页面和主页导航栏。

• You can make single page application and use $routeProvider and ng-view for both login page and homepage navbar.

或者你的应用程序可以由不同的页面，但在每一个页面中，您必须调用服务器获取用户信息

Or your app can consist of different pages, but then in every page you must call server to get user info

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