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           efrain | 
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           <?php
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           /*
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            * Copyright 2010 Google Inc.
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            *
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            * Licensed under the Apache License, Version 2.0 (the "License");
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            * you may not use this file except in compliance with the License.
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            * You may obtain a copy of the License at
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            *
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            *     http://www.apache.org/licenses/LICENSE-2.0
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            *
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            * Unless required by applicable law or agreed to in writing, software
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            * distributed under the License is distributed on an "AS IS" BASIS,
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            * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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            * See the License for the specific language governing permissions and
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            * limitations under the License.
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            */
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           if (!class_exists('Google_Client')) {
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             require_once dirname(__FILE__) . '/../autoload.php';
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           }
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           /**
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            * Abstract class for the Authentication in the API client
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            * @author Chris Chabot <chabotc@google.com>
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            *
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            */
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           abstract class Google_Auth_Abstract
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           {
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             /**
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              * An utility function that first calls $this->auth->sign($request) and then
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              * executes makeRequest() on that signed request. Used for when a request
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              * should be authenticated
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              * @param Google_Http_Request $request
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              * @return Google_Http_Request $request
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              */
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             abstract public function authenticatedRequest(Google_Http_Request $request);
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             abstract public function sign(Google_Http_Request $request);
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           }
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