ios - 使用 GTMOAuth2 在登录时检索 gmail 地址

Question

我使用 GTMOAuth2 通过我的企业应用在 iOS 上登录。场景是只有帐户为@mycompanyname.com 的用户才能登录。

问题是我正在调用文档提供的方法，但我无法检索用户用于登录的电子邮件帐户。

登录调用如下:

_auth = [self authForGoogle];

// Display the authentication view
GTMOAuth2ViewControllerTouch * viewController = [[GTMOAuth2ViewControllerTouch alloc] initWithAuthentication:_auth
                                                                                            authorizationURL:[NSURL URLWithString:GoogleAuthURL]
                                                                                            keychainItemName:@"GoogleKeychainName"
                                                                                                    delegate:self
                                                                                            finishedSelector:@selector(viewController:finishedWithAuth:error:)];
[_window setRootViewController: viewController];
[_window makeKeyAndVisible];

在我的 GTMOAuth2 委托(delegate)方法中，我这样做是为了尝试检索电子邮件地址:

- (void)viewController:(GTMOAuth2ViewControllerTouch * )viewController
  finishedWithAuth:(GTMOAuth2Authentication * )auth
             error:(NSError * )error
{
if ([[_auth userEmail] rangeOfString:@"@mycompanyname.com"].location == NSNotFound && error != nil ) {
    // Loop for no mycompanyname mail domain and also error in login
    NSLog(@"Loop 1 - Non mycompanyname domain email OR Google login error.");
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                     message:@"Please Login with your mycompanyname email."
                                                    delegate:nil
                                           cancelButtonTitle:@"OK"
                                           otherButtonTitles:nil];
    [alert show];        
} else if ([[_auth userEmail] rangeOfString:@"@mycompanyname.com"].location == NSNotFound) {
    // Loop for no error in login but without mycompanyname mail domain
    NSLog(@"Loop 2 - Non mycompanyname domain email AND no Google login error.");

    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Authentication Denied"
                                                     message:@"Please Login with your mycompanyname email."
                                                    delegate:nil
                                           cancelButtonTitle:@"OK"
                                           otherButtonTitles:nil];
    [alert show];
} else if (error != nil) {
    NSLog(@"Loop 3 - mycompanyname domain email AND Google login error.");
    if ([[error localizedDescription] rangeOfString:@"error -1000"].location != NSNotFound)
    {
        NSLog(@"Loop 3.1 - Error message contains 'error -1000'.");
        // Loop to catch unwanted error message from GTMOAuth which will show if user enters the app and decides not to sign in but enters the app after again.
    } else
    {
        // Loop for error in authentication of user for google account
        NSLog(@"Loop 3.2 - Error message caused by no internet connection.");

        UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"Error"
                                                         message:@"Your internet connection seems to be lost."
                                                        delegate:nil
                                               cancelButtonTitle:@"OK"
                                               otherButtonTitles:nil];
        [alert show];

    }
} else {
    // Loop for mycompanyname mail domain and no authentication error
    NSLog(@"Loop 4 - mycompanyname domain email AND no Google login error.");

    // initialize app
}

问题是我无法获得正在尝试登录的用户的正确电子邮件地址，以便能够准确检查电子邮件地址，并且只能在之后初始化应用程序。

我已经检查了错误并使用@gmail.com 地址登录，这解释了为什么代码很长。

求助!提前致谢!

Answer 1

我遇到了完全相同的问题!

经过数小时研究 GTMOAuth2 代码并记录所有内容并跟踪沿途调用的方法后，我设法让它工作了!

我最终检索电子邮件地址所做的是在方法下侵入 GoogleOAuth 类 GTMOAuth2SignIn.m:

- (void)auth:(GTMOAuth2Authentication *)auth finishedWithFetcher:(GTMHTTPFetcher *)fetcher error:(NSError *)error 

这是因为身份验证会显示错误，这将导致身份验证对象无法检索已通过身份验证的用户的值。 IE。不提取用户的电子邮件地址。

因此我在方法中添加了一行，现在它显示如下:

- (void)auth:(GTMOAuth2Authentication *)auth finishedWithFetcher:(GTMHTTPFetcher*)fetcher error:(NSError *)error 
{
  self.pendingFetcher = nil;

#if !GTM_OAUTH2_SKIP_GOOGLE_SUPPORT

  if (error == nil && (self.shouldFetchGoogleUserEmail || self.shouldFetchGoogleUserProfile) && [self.authentication.serviceProvider isEqual:kGTMOAuth2ServiceProviderGoogle]) {
    // fetch the user's information from the Google server
    [self fetchGoogleUserInfo];
  } else {
    // we're not authorizing with Google, so we're done

    /**** CHANGED HERE TO CALL THE FETCH METHOD NO MATTER WHAT SO THAT THE EMAIL CAN BE SHOWN *****/
    [self fetchGoogleUserInfo];
     /**********************************************************************************************/
//[self finishSignInWithError:error]; // comment this out so that it will it will initiate a successful login
  }
#else
   [self finishSignInWithError:error];
#endif
}

在那之后，我使用了相同的调用

[_auth userEmail]

并且能够获取经过身份验证的用户的电子邮件地址。

这对我来说是一个漫长、痛苦且令人毛骨悚然的调试过程，所以我希望这能为您节省一些时间，也能节省大量的头发! :)