/// <summary>
/// Updates the PhoneWebAuthenticationBroker on the state of the authentication
/// operation. If we navigated back by pressing the back key, then the operation
/// will be canceled. If the browser control successfully completed the operation,
/// signaled by its navigating to the PhoneWebAuthenticationBroker.EndUri, then we
/// pass the results on.
/// </summary>
protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
// If there is an active authentication operation in progress and we have
// finished, then we need to inform the authentication broker of the results.
// We don't want to stop the operation prematurely, such as when navigating to
// the start screen.
if (PhoneWebAuthenticationBroker.AuthenticationInProgress && authenticationFinished)
{
authenticationStarted = false;
authenticationFinished = false;
PhoneWebAuthenticationBroker.OnAuthenticationFinished(responseData, responseStatus, responseErrorDetail);
}
}
/// <summary>
/// Log a user into a Mobile Services application given a provider name and optional token object.
/// </summary>
/// <param name="provider" type="MobileServiceAuthenticationProvider">
/// Authentication provider to use.
/// </param>
/// <param name="token" type="JObject">
/// Optional, provider specific object with existing OAuth token to log in with.
/// </param>
/// <returns>
/// Task that will complete when the user has finished authentication.
/// </returns>
internal async Task <MobileServiceUser> SendLoginAsync(MobileServiceAuthenticationProvider provider, JObject token = null)
{
if (this.LoginInProgress)
{
throw new InvalidOperationException(Resources.MobileServiceClient_Login_In_Progress);
}
if (!Enum.IsDefined(typeof(MobileServiceAuthenticationProvider), provider))
{
throw new ArgumentOutOfRangeException("provider");
}
string providerName = provider.ToString().ToLower();
this.LoginInProgress = true;
try
{
JToken response = null;
if (token != null)
{
// Invoke the POST endpoint to exchange provider-specific token for a Windows Azure Mobile Services token
response = await this.RequestAsync("POST", LoginAsyncUriFragment + "/" + providerName, token);
}
else
{
// Use PhoneWebAuthenticationBroker to launch server side OAuth flow using the GET endpoint
Uri startUri = new Uri(this.ApplicationUri, LoginAsyncUriFragment + "/" + providerName);
Uri endUri = new Uri(this.ApplicationUri, LoginAsyncDoneUriFragment);
PhoneAuthenticationResponse result = await PhoneWebAuthenticationBroker.AuthenticateAsync(startUri, endUri);
if (result.ResponseStatus == PhoneAuthenticationStatus.ErrorHttp)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, Resources.Authentication_Failed, result.ResponseErrorDetail));
}
else if (result.ResponseStatus == PhoneAuthenticationStatus.UserCancel)
{
throw new InvalidOperationException(Resources.Authentication_Canceled);
}
int i = result.ResponseData.IndexOf("#token=");
if (i > 0)
{
response = JToken.Parse(Uri.UnescapeDataString(result.ResponseData.Substring(i + 7)));
}
else
{
i = result.ResponseData.IndexOf("#error=");
if (i > 0)
{
throw new InvalidOperationException(string.Format(
CultureInfo.InvariantCulture,
Resources.MobileServiceClient_Login_Error_Response,
Uri.UnescapeDataString(result.ResponseData.Substring(i + 7))));
}
else
{
throw new InvalidOperationException(Resources.MobileServiceClient_Login_Invalid_Response_Format);
}
}
}
// Get the Mobile Services auth token and user data
this.currentUserAuthenticationToken = response.Get(LoginAsyncAuthenticationTokenKey).AsString();
this.CurrentUser = new MobileServiceUser(response.Get("user").Get("userId").AsString());
}
finally
{
this.LoginInProgress = false;
}
return(this.CurrentUser);
}