Angular2，如何防止HTTP重定向 [英] Angular2 , How to prevent from HTTP redirection

问题描述

我正在尝试通过angular2 Http来模拟用户登录。让我们来描述一下情况。

i有一个php应用程序，用户可以登录 http://sample.com/login.php url（a表单存在用户名和密码输入，用户应填写输入并按提交按钮）如果登录成功，他们将重定向到 http://sample.com/dashboard.php 。

所以我创建一个 Http 帖子，其中包含一个表格数据，其中包含用户名和密码。
并将Http标头内容类型设置为 application / x-www-form-urlencoded 。

登录正常，请求自动重定向到 http://sample.com/dashboard.php 。
问题我需要访问第一个请求响应标头（ http://sample.com/login.php ），但Http会回复第二个请求响应标头（ http://sample.com /dashboard.php ）。

是否可以防止Http重定向？或者在状态302上抛出错误？

I am trying to simulating user login by angular2 Http. let describe situation as bellow.
i have a php application that users can login throw http://sample.com/login.php url (a form exist with username and password input, user should fill inputs and press submit button) and if login is success, they redirect to http://sample.com/dashboard.php.
so i create a Http post with a form data that has "username" and "password" within. and set Http header content-type as application/x-www-form-urlencoded.
login works fine and request automatically redirect to http://sample.com/dashboard.php .
problem is that i need to access first request response header(http://sample.com/login.php), but the Http response me the second request response header (http://sample.com/dashboard.php).
is that any way to prevent Http from redirecting? or throw error on status 302 ?

var headers = new Headers({'Content-Type':'application/x-www-form-urlencoded'});
var options = new RequestOptions({ headers: headers });
Http.post("http://sample.com/login.php",'username=admin&password=123' , options)
    .subscribe(success => {
        // success and return redirected response
        // response of http://sample.com/dashboard.php
    }, error => {
        // error handler
    }
);

推荐答案

这是不可能的，因为XMLHttpRequest（低级API）没有公开这样的方法。

This is not possible because XMLHttpRequest (low level API) does not expose such a method.

详情请看：

防止重定向Xmlhttprequest

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