Verzeichnisstruktur phpBB-3.2.0
- Veröffentlicht
- 06.01.2017
So funktioniert es
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file_downloader.php
001 <?php
002 /**
003 *
004 * This file is part of the phpBB Forum Software package.
005 *
006 * @copyright (c) phpBB Limited <https://www.phpbb.com>
007 * @license GNU General Public License, version 2 (GPL-2.0)
008 *
009 * For full copyright and license information, please see
010 * the docs/CREDITS.txt file.
011 *
012 */
013
014 namespace phpbb;
015
016 class file_downloader
017 {
018 /** @var string Error string */
019 protected $error_string = '';
020
021 /** @var int Error number */
022 protected $error_number = 0;
023
024 /**
025 * Retrieve contents from remotely stored file
026 *
027 * @param string $host File host
028 * @param string $directory Directory file is in
029 * @param string $filename Filename of file to retrieve
030 * @param int $port Port to connect to; default: 80
031 * @param int $timeout Connection timeout in seconds; default: 6
032 *
033 * @return mixed File data as string if file can be read and there is no
034 * timeout, false if there were errors or the connection timed out
035 *
036 * @throws \phpbb\exception\runtime_exception If data can't be retrieved and no error
037 * message is returned
038 */
039 public function get($host, $directory, $filename, $port = 80, $timeout = 6)
040 {
041 // Set default values for error variables
042 $this->error_number = 0;
043 $this->error_string = '';
044
045 if ($socket = @fsockopen(($port == 443 ? 'tls://' : '') . $host, $port, $this->error_number, $this->error_string, $timeout))
046 {
047 @fputs($socket, "GET $directory/$filename HTTP/1.0\r\n");
048 @fputs($socket, "HOST: $host\r\n");
049 @fputs($socket, "Connection: close\r\n\r\n");
050
051 $timer_stop = time() + $timeout;
052 stream_set_timeout($socket, $timeout);
053
054 $file_info = '';
055 $get_info = false;
056
057 while (!@feof($socket))
058 {
059 if ($get_info)
060 {
061 $file_info .= @fread($socket, 1024);
062 }
063 else
064 {
065 $line = @fgets($socket, 1024);
066 if ($line == "\r\n")
067 {
068 $get_info = true;
069 }
070 else if (stripos($line, '404 not found') !== false)
071 {
072 throw new \phpbb\exception\runtime_exception('FILE_NOT_FOUND', array($filename));
073 }
074 }
075
076 $stream_meta_data = stream_get_meta_data($socket);
077
078 if (!empty($stream_meta_data['timed_out']) || time() >= $timer_stop)
079 {
080 throw new \phpbb\exception\runtime_exception('FSOCK_TIMEOUT');
081 }
082 }
083 @fclose($socket);
084 }
085 else
086 {
087 if ($this->error_string)
088 {
089 $this->error_string = utf8_convert_message($this->error_string);
090 return false;
091 }
092 else
093 {
094 throw new \phpbb\exception\runtime_exception('FSOCK_DISABLED');
095 }
096 }
097
098 return $file_info;
099 }
100
101 /**
102 * Get error string
103 *
104 * @return string Error string
105 */
106 public function get_error_string()
107 {
108 return $this->error_string;
109 }
110
111 /**
112 * Get error number
113 *
114 * @return int Error number
115 */
116 public function get_error_number()
117 {
118 return $this->error_number;
119 }
120 }
121