Azure移动应用程序-自定义身份验证-无法登录 [英] Azure Mobile Apps - Custom authentication - Unable to login
问题描述
我正在使用.NET背景的Xamarin Forms移动应用程序.我尽可能地遵循了指南.但是这些以某种方式还没有完成,并且没有完整的自定义身份验证示例.我终于达到了我现在不该如何前进的地步.我无法使登录正常工作.
I'm working in a Xamarin Forms mobile app with .NET background. I followed the guides as much as I could. But those are somehow uncompleted and there are not complete examples of custom authentication. I finally reach a point were I don't now how to advance. I can't make the login work.
客户端收到LoginAsync的响应后,我得到此错误:
I get this error after the client gets the respond of the LoginAsync:
user = await TodoItemManager.DefaultManager.CurrentClient.LoginAsync("CustomAuth", credentials);
这是错误:
ex {"Object reference not set to an instance of an object."} System.Exception {System.NullReferenceException}
如果我使用像Google+这样的默认提供程序,那就完美了.所以我认为问题出在后端.但是我不知道我在做什么错.我循环了几次代码,看起来还不错. 我尝试调试服务器端,直到到达客户端为止,我没有收到任何错误.
If I use a default provider like Google+ works perfect. So I think the problem is in the backend. But I don't know what I'm doing wrong. I loop up the code several times and looks fine. I tried debugging the server side and I didn't get any error until it reaches the client side.
我在做什么错了?
这是我在服务器端的代码.
This is my code in the server side.
public IHttpActionResult Post(LoginRequest loginRequest)
{
if (isValidAssertion(loginRequest.username, loginRequest.password)) // user-defined function, checks against a database
{
JwtSecurityToken token = GetAuthenticationTokenForUser(loginRequest.username);
return Ok(new
{
AuthenticationToken = token.RawData,
User = new { UserId = loginRequest.username }
});
}
else // user assertion was not valid
{
return Unauthorized();
}
}
辅助功能:
private bool isValidAssertion(string username, string password)
{
AspNetUsers AspNetUser = db.AspNetUsers.SingleOrDefault(x => x.UserName.ToLower() == username.ToLower());
return AspNetUser != null && VerifyHashedPassword(AspNetUser.PasswordHash, password);
}
private JwtSecurityToken GetAuthenticationTokenForUser(string username)
{
var claims = new Claim[]
{
new Claim(JwtRegisteredClaimNames.Sub, username)
};
string signingKey = "123456789123456789...";//Environment.GetEnvironmentVariable("WEBSITE_AUTH_SIGNING_KEY");
string audience = "https://todo.azurewebsites.net/"; // audience must match the url of the site
string issuer = "https://todo.azurewebsites.net/"; // audience must match the url of the site
JwtSecurityToken token = AppServiceLoginHandler.CreateToken(
claims,
signingKey,
audience,
issuer,
TimeSpan.FromHours(24)
);
return token;
}
在启动类中,我添加了:
In the Startup class I added:
config.Routes.MapHttpRoute("CustomAuth", ".auth/login/CustomAuth", new { controller = "CustomAuth" });
这是我在客户端的代码:
And this is my code in the client side:
public async Task<bool> Authenticate()
{
string username = "todo@gmail.com";
string password = "todo";
string message = string.Empty;
var success = false;
var credentials = new JObject
{
["username"] = username,
["password"] = password
};
try
{
user = await TodoItemManager.DefaultManager.CurrentClient.LoginAsync("CustomAuth", credentials);
if (user != null)
{
success = true;
message = string.Format("You are now signed-in as {0}.", user.UserId);
}
}
catch (Exception ex)
{
message = string.Format("Authentication Failed: {0}", ex.Message);
}
await new MessageDialog(message, "Sign-in result").ShowAsync();
return success;
}
感谢您的帮助.
编辑(解决方案):
我要为遇到同样问题的人澄清.该错误大约是一些大写/小写的差异.返回中的名称必须为"user","userId"和"authenticationToken".完全像这样:
I'm gonna clarify for people with the same problem. The error was about some uppercase/lowercase differences. The names in the return must be "user", "userId" and "authenticationToken". Exactly like this:
return Ok(new
{
authenticationToken = token.RawData,
user = new { userId = loginRequest.username }
});
推荐答案
您的服务器响应似乎不正确.查看有效的响应,看起来它应该是:
It looks like your response from the server is wrong. Looking at a valid response, it looks like it needs to be:
{
"user": "your-user-id",
"authenticationToken": "the-jwt"
}
更正服务器代码中的响应,看看是否有帮助.
Correct the response from your server code and see if that helps.
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