122 lines
3.0 KiB
PHP
122 lines
3.0 KiB
PHP
<?php
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/**
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* Copyright (c) 2013 Robin Appelman <icewind@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC\Files\Type;
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/**
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* Class Detection
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*
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* Mimetype detection
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*
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* @package OC\Files\Type
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*/
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class Detection {
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protected $mimetypes = array();
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/**
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* add an extension -> mimetype mapping
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*
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* @param string $extension
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* @param string $mimetype
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*/
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public function registerType($extension, $mimetype) {
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$this->mimetypes[$extension] = $mimetype;
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}
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/**
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* add an array of extension -> mimetype mappings
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*
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* @param array $types
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*/
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public function registerTypeArray($types) {
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$this->mimetypes = array_merge($this->mimetypes, $types);
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}
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/**
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* detect mimetype only based on filename, content of file is not used
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*
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* @param string $path
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* @return string
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*/
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public function detectPath($path) {
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if (strpos($path, '.')) {
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//try to guess the type by the file extension
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$extension = strtolower(strrchr(basename($path), "."));
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$extension = substr($extension, 1); //remove leading .
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return (isset($this->mimetypes[$extension])) ? $this->mimetypes[$extension] : 'application/octet-stream';
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} else {
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return 'application/octet-stream';
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}
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}
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/**
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* detect mimetype based on both filename and content
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*
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* @param string $path
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* @return string
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*/
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public function detect($path) {
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$isWrapped = (strpos($path, '://') !== false) and (substr($path, 0, 7) === 'file://');
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if (@is_dir($path)) {
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// directories are easy
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return "httpd/unix-directory";
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}
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$mimeType = $this->detectPath($path);
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if ($mimeType === 'application/octet-stream' and function_exists('finfo_open')
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and function_exists('finfo_file') and $finfo = finfo_open(FILEINFO_MIME)
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) {
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$info = @strtolower(finfo_file($finfo, $path));
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if ($info) {
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$mimeType = substr($info, 0, strpos($info, ';'));
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}
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finfo_close($finfo);
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}
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if (!$isWrapped and $mimeType === 'application/octet-stream' && function_exists("mime_content_type")) {
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// use mime magic extension if available
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$mimeType = mime_content_type($path);
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}
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if (!$isWrapped and $mimeType === 'application/octet-stream' && \OC_Helper::canExecute("file")) {
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// it looks like we have a 'file' command,
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// lets see if it does have mime support
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$path = escapeshellarg($path);
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$fp = popen("file -b --mime-type $path 2>/dev/null", "r");
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$reply = fgets($fp);
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pclose($fp);
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//trim the newline
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$mimeType = trim($reply);
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}
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return $mimeType;
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}
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/**
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* detect mimetype based on the content of a string
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*
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* @param string $data
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* @return string
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*/
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public function detectString($data) {
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if (function_exists('finfo_open') and function_exists('finfo_file')) {
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$finfo = finfo_open(FILEINFO_MIME);
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return finfo_buffer($finfo, $data);
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} else {
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$tmpFile = \OC_Helper::tmpFile();
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$fh = fopen($tmpFile, 'wb');
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fwrite($fh, $data, 8024);
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fclose($fh);
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$mime = $this->detect($tmpFile);
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unset($tmpFile);
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return $mime;
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}
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}
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}
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