library/log4php/configurators/LoggerConfigurationAdapterPHP.php
author Markus Broeker<broeker.markus@googlemail.com>
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<?php
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/**
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements. See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License. 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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 * @package log4php
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 */
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/**
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 * Converts PHP configuration files to a PHP array.
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 *
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 * The file should only hold the PHP config array preceded by "return".
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 *
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 * Example PHP config file:
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 * <code>
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 * <?php
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 * return array(
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 *   'rootLogger' => array(
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 *     'level' => 'info',
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 *     'appenders' => array('default')
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 *   ),
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 *   'appenders' => array(
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 *     'default' => array(
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 *       'class' => 'LoggerAppenderEcho',
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 *       'layout' => array(
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 *        'class' => 'LoggerLayoutSimple'
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 *        )
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 *     )
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 *   )
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 * )
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 * ?>
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 * </code>
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 *
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 * @package log4php
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 * @subpackage configurators
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 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
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 * @version $Revision: 1343601 $
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 * @since 2.2
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 */
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class LoggerConfigurationAdapterPHP implements LoggerConfigurationAdapter {
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    public function convert($url) {
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        if (!file_exists($url)) {
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            throw new LoggerException("File [$url] does not exist.");
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        }
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        // Load the config file
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        $data = @file_get_contents($url);
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        if ($data === false) {
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            $error = error_get_last();
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            throw new LoggerException("Error loading config file: {$error['message']}");
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        }
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        $config = @eval('?>' . $data);
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        if ($config === false) {
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            $error = error_get_last();
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            throw new LoggerException("Error parsing configuration: " . $error['message']);
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        }
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        if (empty($config)) {
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            throw new LoggerException("Invalid configuration: empty configuration array.");
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        }
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        if (!is_array($config)) {
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            throw new LoggerException("Invalid configuration: not an array.");
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        }
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        return $config;
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    }
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}
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