CODEWITHSUNDEEP
c#azure
Chris Lui
Chris Lui

Reputation: 341

Azure Mobile Service .NET Backend HttpResponseMessage return null Content

I had this function in the web api of the mobile service declared 

public HttpResponseMessage Post(LoginRequest loginRequest)
{
    EasyParkContext context = new EasyParkContext();
    User user = context.Users.SingleOrDefault(a => a.UserName == loginRequest.UserName);
    if (user != null)
    {
        if (BCrypt.Net.BCrypt.Verify(loginRequest.Password, user.Password))
        {
            ClaimsIdentity claimsIdentity = new ClaimsIdentity();
            claimsIdentity.AddClaim(new Claim(ClaimTypes.PrimarySid, user.Id));
            claimsIdentity.AddClaim(new Claim(ClaimTypes.NameIdentifier, loginRequest.UserName));
            LoginResult loginResult = new EasyParkLoginProvider(handler).CreateLoginResult(claimsIdentity, Services.Settings.MasterKey);
            return this.Request.CreateResponse(HttpStatusCode.OK, loginResult);
        }
    }
    return this.Request.CreateResponse(HttpStatusCode.Unauthorized, "Invalid username or password");
}

And this function declared in my client 

public async Task<bool> Login(string userName, string password)
{
    LoginRequest loginRequest = new LoginRequest() { UserName = userName, Password = password };
    try
    {
        HttpResponseMessage loginResult = await _service.InvokeApiAsync<LoginRequest, HttpResponseMessage>("EasyParkLogin", loginRequest);
        JObject json = JObject.Parse(loginResult.Content.ToString());
        _service.CurrentUser = new MobileServiceUser(json["user"]["userId"].ToString().Replace("EasyPark:", ""))
        {
            MobileServiceAuthenticationToken = json["authenticationToken"].ToString()
        };
        return true;
    }
    catch (Exception e)
    {
        return false;
    }
}

It works at the mobile service page, but is returning null during my client code, sorry I can't attached the image due to my reputation...

Upvotes: 2

Views: 332

Answers (2)

Hui Fei
Hui Fei

Reputation: 15

try to check the return value of 

await _service.InvokeApiAsync<LoginRequest, HttpResponseMessage>("EasyParkLogin", loginRequest);

Upvotes: -1

Chris Lui
Chris Lui

Reputation: 341

public async Task<bool> Login(string userName, string password)
{
    LoginRequest loginRequest = new LoginRequest() { UserName = userName, Password = password };
    try
    {
        var loginResult = await _service.InvokeApiAsync("EasyParkLogin", JToken.FromObject(loginRequest));
        JObject json = JObject.Parse(loginResult.ToString());
        _service.CurrentUser = new MobileServiceUser(json["user"]["userId"].ToString().Replace("EasyPark:", ""))
        {
            MobileServiceAuthenticationToken = json["authenticationToken"].ToString()
        };
        return true;
    }
    catch (Exception e)
    {
        return false;
    }
}

by changing the from the code: 

HttpResponseMessage loginResult = await _service.InvokeApiAsync<LoginRequest, HttpResponseMessage>("EasyParkLogin", loginRequest);
JObject json = JObject.Parse(loginResult.Content.ToString());

to 

var loginResult = await _service.InvokeApiAsync("EasyParkLogin", JToken.FromObject(loginRequest));
JObject json = JObject.Parse(loginResult.ToString());

Upvotes: 2

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