我正在通过Google+进行身份验证,具体如下: https://developers.google.com/+/mobile/android/sign-in
这个过程大部分都很好。我遇到的问题是我们需要获得一次性授权代码"这样我们的后端服务器可以代表用户在他们的许可下执行某些请求。这将在“#34;为您的应用启用服务器端api访问”部分中介绍"。但是,由于多种原因,我们的服务器可能导致登录失败,即使授权代码有效(例如,用户没有与我们的Google +帐户相对应的帐户)服务器,在这种情况下,他们可以制作一个)。
如果发生这种情况,我们可能需要他们稍后再次登录。但我发现,当我使用google +执行第二次登录时,它会为我提供相同的授权码,即使它们已被我们的服务器使用过。我尝试断开连接并重新连接到谷歌客户端API,并调用GoogleApiClient.clearDefaultAccountAndReconnect()
,但无论我做什么,我似乎最终得到相同的授权码。当然,当服务器尝试使用它时,它会被拒绝,因为它已经被使用过了。
我想知道我在这里做错了什么。我有以下方法,在初始身份验证过程中调用,然后再次从我们的服务器检测到500
的响应状态(表示先前的调用失败,可能是因为代码已被使用):
private void dispatchGooglePlusAuthCodeAcquisition() {
AsyncTask<Void, Void, String> authAcquisition = new AsyncTask<Void, Void, String>() {
@Override
protected String doInBackground(Void... params) {
Bundle authPreferences = new Bundle();
mUserPermissionNeededForAuthCode = false;
authPreferences.putString(GoogleAuthUtil.KEY_REQUEST_VISIBLE_ACTIVITIES,
"");
String scopesString = Scopes.PROFILE;
WhenIWorkApplication app = (WhenIWorkApplication)WhenIWorkApplication.getInstance();
String serverClientID = app.getGoogleOAuthClientIDForPersonalServer();
String scope = "oauth2:server:client_id:" + serverClientID + ":api_scope:" + scopesString;
String code = null;
authPreferences.putBoolean(GoogleAuthUtil.KEY_SUPPRESS_PROGRESS_SCREEN, true);
try {
code = GoogleAuthUtil.getToken(
mActivity,
Plus.AccountApi.getAccountName(mGoogleApiClient),
scope,
authPreferences
);
} catch (IOException transientEx) {
// network or server error, the call is expected to succeed if you try again later.
// Don't attempt to call again immediately - the request is likely to
// fail, you'll hit quotas or back-off.
Log.d(LOGTAG, "Encountered an IOException while trying to login to Google+."
+ " We'll need to try again at a later time.");
} catch (UserRecoverableAuthException e) {
mUserPermissionNeededForAuthCode = true;
// Requesting an authorization code will always throw
// UserRecoverableAuthException on the first call to GoogleAuthUtil.getToken
// because the user must consent to offline access to their data. After
// consent is granted control is returned to your activity in onActivityResult
// and the second call to GoogleAuthUtil.getToken will succeed.
if (!mGooglePlusPermissionActivityStarted) {
mGooglePlusPermissionActivityStarted = true;
mActivity.startActivityForResult(e.getIntent(), RESULT_CODE_AUTH_CODE);
}
} catch (GoogleAuthException authEx) {
// Failure. The call is not expected to ever succeed so it should not be
// retried.
Log.e(LOGTAG, "Unable to authenticate to Google+. Call will likely never"
+ " succeed, so bailing.", authEx);
}
return code;
}
@Override
protected void onPostExecute(String aResult) {
if (aResult != null) {
// We retrieved an authorization code successfully.
if (mAPIAccessListener != null) {
mAPIAccessListener.onAuthorizationCodeGranted(aResult);
}
} else if (!mUserPermissionNeededForAuthCode) {
// If this is the case, then we didn't get authorization from the user, or something
// else happened.
if (mAPIAccessListener != null) {
mAPIAccessListener.onAuthorizationFailed();
}
Log.d(LOGTAG, "Unable to login because authorization code retrieved was null");
}
}
};
authAcquisition.execute();
答案 0 :(得分:3)
所以,答案比我想象的要简单得多。显然,clearToken()
类上有一个GoogleAuthUtil
方法:
public static void clearToken(Context context,String token)
关于Context,清除本地缓存中的指定标记。请注意,上下文必须与先前调用getToken(Context,String,String)或getToken(Context,String,String,Bundle)时初始化标记的上下文相同。
<强>参数强>
context
令牌的上下文。
token
要清除的令牌。<强>抛出强>
GooglePlayServicesAvailabilityException
GoogleAuthException
IOException
在尝试重新验证之前调用此方法会导致Google生成新的一次性授权令牌。