62 lines
1.9 KiB
PHP
62 lines
1.9 KiB
PHP
<?php
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/**
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* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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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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* A copy of the License is located at
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*
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* http://aws.amazon.com/apache2.0
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*
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* or in the "license" file accompanying this file. This file is distributed
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* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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namespace Aws\Common\Client;
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use Guzzle\Common\Event;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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/**
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* Listener used to append strings to the User-Agent header of a request based
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* on the `ua.append` option. `ua.append` can contain a string or array of values.
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*/
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class UserAgentListener implements EventSubscriberInterface
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{
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/**
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* @var string Option used to store User-Agent modifiers
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*/
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const OPTION = 'ua.append';
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/**
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* {@inheritdoc}
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*/
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public static function getSubscribedEvents()
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{
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return array('command.before_send' => 'onBeforeSend');
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}
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/**
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* Adds strings to the User-Agent header using the `ua.append` parameter of a command
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*
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* @param Event $event Event emitted
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*/
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public function onBeforeSend(Event $event)
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{
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$command = $event['command'];
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if ($userAgentAppends = $command->get(self::OPTION)) {
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$request = $command->getRequest();
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$userAgent = (string) $request->getHeader('User-Agent');
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foreach ((array) $userAgentAppends as $append) {
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$append = ' ' . $append;
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if (strpos($userAgent, $append) === false) {
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$userAgent .= $append;
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}
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}
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$request->setHeader('User-Agent', $userAgent);
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}
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}
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}
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