65 lines
2.2 KiB
PHP
65 lines
2.2 KiB
PHP
<?php
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namespace TYPO3\CMS\Frontend\Utility;
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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/**
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* This class contains compression functions for the TYPO3 Frontend. It can be
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* used only in EXT:frontend/Classes/Http/RequestHandler.php
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*
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* @internal this is a internal TYPO3 implementation and solely used for EXT:frontend and not part of TYPO3's Core API.
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*/
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class CompressionUtility implements \TYPO3\CMS\Core\SingletonInterface
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{
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/**
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* Accumulates content length for the compressed content. It is necessary to
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* replace the Content-length HTTP header after compression if it was added
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* by TYPO3 before compression.
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*
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* @var int
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*/
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protected $contentLength = 0;
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/**
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* Corrects HTTP "Content-length" header if it was sent by TYPO3 and compression
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* is enabled.
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*
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* @param string $outputBuffer Output buffer to compress
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* @param int $mode One of PHP_OUTPUT_HANDLER_xxx constants
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* @return string Compressed string
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* @see ob_start()
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* @see ob_gzhandler()
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*/
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public function compressionOutputHandler($outputBuffer, $mode)
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{
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// Compress the content
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$outputBuffer = ob_gzhandler($outputBuffer, $mode);
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if ($outputBuffer !== false) {
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// Save compressed size
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$this->contentLength += strlen($outputBuffer);
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// Check if this was the last content chunk
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if (0 != ($mode & PHP_OUTPUT_HANDLER_END)) {
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// Check if we have content-length header
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foreach (headers_list() as $header) {
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if (0 == strncasecmp('Content-length:', $header, 15)) {
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header('Content-length: ' . $this->contentLength);
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break;
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}
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}
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}
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}
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return $outputBuffer;
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}
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}
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