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如何在我的Web应用程序中使用AccountManager中的Google令牌？（使用omniauth-google-oauth2滚动）

debugcn 发表于 Dev
12
奥德·尼维（Oded Niv）
  • 我有一个网络应用程序，omniauth-google-oauth2用于使用Google帐户进行身份验证。然后使用cookie（session[:user_id]）保留会话。这行得通。
  • 我还有一个Android应用程序，该应用程序使用REST / JSON API使用网站服务。该应用程序用于AccountManager获取访问令牌。这也有效。

我正在尝试让Android应用程序发出一个请求，该请求使Web应用程序验证该令牌并启动与Android应用程序的会话（cookie在Android应用程序上是持久的）。

我注意到Google的回调URL是：http://my.domain.com/auth/google_oauth2/callback，所以我尝试添加参数state="/"和code="<TOKEN FROM AccountManager>"。

这导致：

(google_oauth2) Callback phase initiated.
(google_oauth2) Authentication failure! invalid_credentials: OmniAuth::Strategies::OAuth2::CallbackError, OmniAuth::Strategies::OAuth2::CallbackError

Started GET "/auth/google_oauth2/callback?state=%2F&code=<TOKEN FROM AccountManager>" for 5.102.217.111 at 2013-08-10 18:38:58 +0300

OmniAuth::Strategies::OAuth2::CallbackError (OmniAuth::Strategies::OAuth2::CallbackError):
  omniauth-oauth2 (1.1.1) lib/omniauth/strategies/oauth2.rb:71:in `callback_phase'
  omniauth (1.1.4) lib/omniauth/strategy.rb:226:in `callback_call'
  omniauth (1.1.4) lib/omniauth/strategy.rb:182:in `call!'
  omniauth (1.1.4) lib/omniauth/strategy.rb:164:in `call'
  omniauth (1.1.4) lib/omniauth/builder.rb:49:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
  rack (1.4.5) lib/rack/etag.rb:23:in `call'
  rack (1.4.5) lib/rack/conditionalget.rb:25:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
  rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
  activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__1566251561940761300__call__2926332968477140393__callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
  railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
  activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
  railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.5) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.5) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
  railties (3.2.13) lib/rails/engine.rb:479:in `call'
  railties (3.2.13) lib/rails/application.rb:223:in `call'
  rack (1.4.5) lib/rack/content_length.rb:14:in `call'
  railties (3.2.13) lib/rails/rack/log_tailer.rb:17:in `call'
  rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service'
  /home/oded/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
  /home/oded/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
  /home/oded/.rvm/rubies/ruby-2.0.0-p195/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'


  Rendered /home/oded/.rvm/gems/ruby-2.0.0-p195/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_trace.erb (0.8ms)
  Rendered /home/oded/.rvm/gems/ruby-2.0.0-p195/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.7ms)
  Rendered /home/oded/.rvm/gems/ruby-2.0.0-p195/gems/actionpack-3.2.13/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (5.3ms)

网络和Android应用程序均已在Google API控制台中获得授权。

GoogleAuthUtil由于三个原因，我不想使用它：我已经完全实现了AccountManager，它至少使我的应用程序大小增加了一倍，并且我看不到它如何解决我的Web应用程序的问题。

作为一个临时解决方案，我进行了一个WebView活动，该活动与Web应用程序经过相同的过程。这不是一个好的解决方案，因为用户需要输入他的电子邮件和密码，而他却无法分辨该邮件是否是网络钓鱼。

宝石文件：

gem 'omniauth-google-oauth2'

SessionsControler（app / controllers / sessions_controller.rb）：

def new
  redirect_to "/auth/google_oauth2"
end

def create
  auth = request.env["omniauth.auth"]
  account = case auth['provider']
    when GoogleAccount::PROVIDER then GoogleAccount.find_by_omniauth(auth)
  end
  session[:user_id] = account.user.id
  respond_to do |format|
    format.html { redirect_to root_url, :notice => "Signed in!" }
    format.json { render json: { result: true } }
  end
end

GoogleAccount（app / models / google_account.rb）：

after_validation :create_user!, on: :create

def self.find_by_omniauth(auth)
  google_account = find_by_uid(auth['uid']) || new(uid: auth['uid'])
  google_account.attributes = auth['info'].select { |k, v| k.in?(attribute_names) }
  google_account.save!
  google_account
end

SessionManager.java：

public void login() {
    _accountManager = AccountManager.get(_activity);
    final Account[] accounts = _accountManager.getAccountsByType("com.google");
    String[] accountNames = new String[accounts.length];
    for (int i = 0; i < accounts.length; i++) {
        accountNames[i] = accounts[i].name;
    }

    new AlertDialog.Builder(_activity).
    setItems(accountNames, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            _account = accounts[which];
            getAuthToken();
        }
    }).
    show();
}

private void getAuthToken() {
    _accountManager.getAuthToken(
            _account, "ah", null, _activity,
            new AccountManagerCallback<Bundle>() {
                @Override
                public void run(AccountManagerFuture<Bundle> result) {
                    Bundle bundle;
                    try {
                        bundle = result.getResult();
                    } catch (OperationCanceledException e) {
                        // TODO: handle errors
                        e.printStackTrace();
                        return;
                    } catch (AuthenticatorException e) {
                        // TODO: handle errors
                        e.printStackTrace();
                        return;
                    } catch (IOException e) {
                        // TODO: handle errors
                        e.printStackTrace();
                        return;
                    }

                    Intent launch = (Intent) bundle.get(AccountManager.KEY_INTENT);
                    if (launch != null) {
                        _activity.startActivityForResult(launch, _accountManagerRequestCode);
                        return;
                    }

                    onGetAuthToken(bundle);
                }
            },
            null
            );
}

public void onAccountManagerResult(int resultCode, Intent data) {
    switch (resultCode) {
    case Activity.RESULT_OK:
        _accountManager = AccountManager.get(_activity);
        getAuthToken();
        break;
    }
}

private void onGetAuthToken(Bundle bundle) {
    final String token = bundle.getString(AccountManager.KEY_AUTHTOKEN);
    login(
            token,
            new LoginResponseHandler() {
                @Override
                public void onResult(boolean result, boolean hadAnonymous, String message, Map<String, List<String>> errors) {
                    if (result) {
                        setLoggedIn(true);
                    } else {
                        // Token expired?
                        _accountManager.invalidateAuthToken("com.google", token);
                        getAuthToken();
                    }
                }
            });
}

public static void login(String token, LoginResponseHandler loginResponseHandler) {
    RequestParams requestParams = defaultRequestParams();
    requestParams.put("code", token);
    requestParams.put("state", "/");
    _client.get(
            BASE_URL + "/auth/google_oauth2/callback", requestParams,
            new JsonLoginResponseHandler(loginResponseHandler));
}
奥德·尼维（Oded Niv）

我设法在服务器端手动验证令牌，而没有使用omniauth。

  • 我不得不将呼叫更改为AccountManager#getAuthToken。的authTokenType参数（先前"ah"）需要被填充有客户ID而不是如下："audience:server:client_id:" + CLIENT_ID。客户端ID是从API控制台中检索的，属于您的Web应用程序。看起来像这样：123456789.apps.googleusercontent.com。
  • 服务器端的代码非常简单，所以我不介意：

SessionsController（app / controllers / sessions_controller.rb）：

def create
  auth = request.env["omniauth.auth"]
  if auth
    account = case auth['provider']
                when GoogleAccount::OAUTH_PROVIDER then GoogleAccount.find_by_omniauth(auth)
              end
  else
    account = case params[:provider]
                when GoogleAccount::PROVIDER then GoogleAccount.find_by_token(params[:token])
              end
  end
  render text: "Unauthoirized", status: :unauthorized and return if account.nil?
  session[:user_id] = account.user.id
    respond_to do |format|
    format.html { redirect_to root_url, :notice => "Signed in!" }
    format.json { render json: { result: true } }
  end
end

GoogleAccount（app / models / google_account.rb）：

def self.find_by_token(token)
  validator = GoogleIDToken::Validator.new
  jwt = validator.check(token, CLIENT_ID)
  return if jwt.nil?

  google_account = where(uid: jwt['id']).first_or_initialize
  google_account.email = jwt['email']
  google_account.save!
  google_account
end

jwt 是一个看起来像这样的哈希：

{"iss"=>"accounts.google.com",
 "verified_email"=>"true",
 "email_verified"=>"true",
 "email"=>"[email protected]",
 "aud"=>"123456789.apps.googleusercontent.com", # aka CLIENT_ID
 "cid"=>"123456789-somerandomletters.apps.googleusercontent.com", # this is the device ID, you can validate that too with another parameter
 "azp"=>"123456789-samerandomletters.apps.googleusercontent.com",
 "id"=>"10000000000000000000", # this is Google's user ID for this user, keep it
 "sub"=>"10000000000000000000",
 "iat"=>1376306389,
 "exp"=>1376310289}

现在服务器没有获得与在Web上登录时获得的详细信息相同的信息，因为令牌仅包含电子邮件，但这对我来说已经足够。我也不验证CID（设备ID），不确定何时需要。

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