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Code source de bblocked 0.6.5 |
1 <?php 2 /*********************************************************\ 3 ****** bblocked Proxy class ****** 4 ***** ***** 5 **** Copyleft (C) 2007 bblocked **** 6 *** *** 7 ** This program is free software; you can redistribute it and/or ** 8 ** modify it under the terms of the GNU General Public License ** 9 ** as published by the Free Software Foundation; either version 2 ** 10 ** of the License, or (at your option) any later version. ** 11 ** ** 12 ** This program is distributed in the hope that it will be useful, ** 13 ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** 14 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** 15 ** GNU General Public License for more details. ** 16 *** *** 17 **** **** 18 **** http://www.bblocked.org/ ***** 19 ****** ****** 20 \*********************************************************/ 21 22 23 /* Do not remove, prevents direct file access */ 24 if(!defined('BB')) 25 die(); 26 27 28 29 // Class containing bblocked Proxy engine 30 31 class Proxy { 32 33 var $_socket; 34 var $_url; 35 var $_method; 36 var $_headers; 37 var $_page; 38 var $_content_type; 39 var $_no_cache; 40 var $_realm; 41 var $_cookies = array(); 42 var $_auth = array(); 43 44 function url_parse($url, &$container) { 45 46 $container = array(); 47 $temp = (is_array(@parse_url($url)) ? @parse_url($url) : @parse_url(decode_url($url))); 48 49 if(!empty($temp)) { 50 51 $temp['port_ext'] = ''; 52 $temp['base'] = $temp['scheme'] . '://' . $temp['host']; 53 54 if(isset($temp['port']) && (($temp['scheme'] == 'http' && $temp['port'] != 80) || ($temp['scheme'] == 'ftp' && $temp['port'] != 21))) 55 $temp['base'] .= $temp['port_ext'] = ':' . $temp['port']; 56 57 else 58 $temp['port'] = $temp['scheme'] === 'https' ? 443 : ($temp['scheme'] === 'ftp' ? 21 : 80); 59 60 61 if($temp['scheme'] == 'https' && (!$GLOBALS['_config']['unsecure_ssl'] && !$_SERVER['HTTPS'])) { 62 63 $temp['port_ext'] ? '' : $temp['port'] = 80; 64 $temp['scheme'] = 'http'; 65 } 66 67 $temp['path'] = isset($temp['path']) ? $temp['path'] : '/'; 68 $path = array(); 69 $temp['path'] = explode('/', $temp['path']); 70 71 foreach($temp['path'] as $dir) { 72 73 if($dir === '..') 74 array_pop($path); 75 76 else if($dir !== '.') { 77 78 for ($dir = rawurldecode($dir), $new_dir = '', $i = 0, $count_i = strlen($dir); $i < $count_i; $new_dir .= strspn($dir{$i}, 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789$-_.+!*\'(),?:@&;=') ? $dir{$i} : rawurlencode($dir{$i}), ++$i); 79 $path[] = $new_dir; 80 } 81 } 82 83 $temp['path'] = str_replace('/%7E', '/~', '/' . ltrim(implode('/', $path), '/')); 84 $temp['file'] = substr($temp['path'], strrpos($temp['path'], '/')+1); 85 $temp['dir'] = substr($temp['path'], 0, strrpos($temp['path'], '/')); 86 $temp['prev_dir'] = substr_count($temp['path'], '/') > 1 ? substr($temp['dir'], 0, strrpos($temp['dir'], '/')+1) : '/'; 87 $temp['full'] = $temp['base'] . $temp['path'] . ($temp['path']{-1} == '/' ? $temp['file'] : '') . ($temp['query'] ? '?' . $temp['query']: ''); 88 $container = $temp; 89 90 return true; 91 } 92 93 return false; 94 } 95 96 function write_cache() { 97 98 $time = time(); 99 100 foreach($this->_headers as $k=>$v) 101 $headers .= "{$k}: {$v}\r\n"; 102 103 $content = "{$time}\r\n{$headers}\r\n{$this->_page}"; 104 $fp = @fopen($GLOBALS['_config']['cache_dir'] . md5($this->_url['full']) . '.cache', 'w'); 105 @fwrite($fp, $content . "\n\n<!-- servered from cache; cached on " . date("D, d F Y", $time) . ' -->'); 106 @fclose($fp); 107 } 108 109 function read_cache(&$data) { 110 111 $cache_file = $GLOBALS['_config']['cache_dir'] . md5($this->_url['full']) . '.cache'; 112 if(file_exists($cache_file)) { 113 114 list($date, $data) = explode("\r\n", file_get_contents($cache_file), 2); 115 116 if(time() <= $date+$GLOBALS['_config']['cache_time']) 117 return true; 118 } 119 return false; 120 } 121 122 function parse_response($data, $cache=false) { 123 124 $headers = array(); 125 126 list($headers, $this->_page) = preg_split("'(HTTP\/1\.[01] \d{3} [a-zA-Z\x20]+\r\n(?:[a-zA-Z\-]{3,}\s*\:.*?\r\n)+\r\n)'s", $data, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); 127 128 $headers = explode("\r\n", $headers); 129 130 sscanf(array_shift($headers), '%s %s', $http_ver, $response_code); 131 132 133 foreach($headers as $h) { 134 135 if($h != '') { 136 list($k, $v) = explode(':', $h, 2); 137 if(strtolower(trim($k)) == 'set-cookie') 138 $header[strtolower(trim($k))][] = trim($v); 139 140 else 141 $header[strtolower(trim($k))] = trim($v); 142 } 143 } 144 145 if($response_code == 304 && isset($header['last-modifed'])) { 146 147 header('HTTP/1.1 304 Not Modified'); 148 header('Date: ' . gmdate("D, d M Y H:i:s", (isset($header['date']) ? intval(@strtotime($header['date'])) : time()))); 149 exit(0); 150 } 151 152 if(isset($header['set-cookie'])) { 153 154 if($GLOBALS['_config']['accept_cookies']) { 155 156 foreach($header['set-cookie'] as $cookie) { 157 158 $name = $value = $expires = $path = $domain = $secure = $expires_time = ''; 159 160 preg_match("'^\s*([^=;,\s]*)\s*=?\s*([^;]*)'", $cookie, $match) && list(, $name, $value) = $match; 161 preg_match("';\s*expires\s*=\s*([^;]*)'i", $cookie, $match) && list(, $expires) = $match; 162 preg_match("';\s*path\s*=\s*([^;,\s]*)'i", $cookie, $match) && list(, $path) = $match; 163 preg_match("';\s*domain\s*=\s*([^;,\s]*)'i", $cookie, $match) && list(, $domain) = $match; 164 preg_match("';\s*(secure\b)'i", $cookie, $match) && list(, $secure) = $match; 165 166 $expires_time = empty($expires) ? 0 : intval(@strtotime($expires)); 167 $path = empty($path) ? '/' : $path; 168 169 if(empty($domain)) 170 $domain = $this->_url['host']; 171 172 else { 173 174 $domain = '.' . strtolower(str_replace('..', '.', trim($domain, '.'))); 175 176 if((!preg_match("'\Q" . $domain . "\E$'i", $this->_url['host']) && $domain != '.' . $this->_url['host']) || (substr_count($domain, '.') < 2 && $domain{0} == '.')) 177 continue; 178 } 179 180 if(count($_COOKIE) >= 15 && time()-$expires_time <= 0) 181 $this->_cookies[] = add_cookie(current($_COOKIE), '', 1); 182 183 if($GLOBALS['_config']['session_cookies']) 184 $_SESSION['data']['cookies'][serialize("$name;$path;$domain")] = serialize("$value;$secure"); 185 186 else 187 $this->_cookies[] = add_cookie("COOKIE;$name;$path;$domain", "$value;$secure", $expires_time); 188 } 189 } 190 unset($header['set-cookie']); 191 } 192 193 if(!empty($this->_cookies)) 194 $header['set-cookie'] = $this->_cookies; 195 196 if(isset($header['location'])) { 197 198 if(preg_match("'^[\\\/]+'", $header['location']{0})) 199 $this->HTTP($this->_url['base'] . $header['location']); 200 201 else 202 $this->HTTP($header['location']); 203 204 return false; 205 } 206 207 else { 208 209 if(isset($header['content-type'])) { 210 211 strpos($header['content-type'], ';') !== false ? (list($this->_content_type, $encoding) = explode(';', str_replace(' ', '', $header['content-type']), 2)) : $this->_content_type = $header['content-type']; 212 213 if(preg_match("'^(text\/(plain|html))'i", $header['content-type']) && !preg_match("'\.js$'i", $this->_url['full'])) 214 $_SESSION['current_url'] = $this->_url['full']; 215 } 216 217 if(isset($header['content-length'])) { 218 219 $content_length = $headers['content-length']; 220 unset($header['content-length']); 221 } 222 223 if(isset($header['content-disposition'])) 224 $header['content-disposition'] = empty($header['content-disposition']) ? ($header['content-disposition'] == 'application/octet_stream' ? 'attachment' : 'inline') . '; filename="' . $this->_url['file'] . '"' : $header['content-disposition']; 225 226 if(isset($header['p3p']) && preg_match("'policyref\s*=\s*[\'\"]?([^\'\"\s]*)[\'\"]?'i", $headers['p3p'][0], $matches)) 227 unset($header['p3p']); 228 229 if(isset($header['refresh']) && preg_match("'([0-9]+)\s*;\s*url\=\s*(\S*)'i", $header['refresh'], $matches)) 230 $header['refresh'] = $matches[1] . "; url={$GLOBALS['_config']['script_url_full']}?{$GLOBALS['_config']['arg_page']}=proxy&{$GLOBALS['_config']['arg_url']}=" . encode_url($matches[2]); 231 232 if(isset($header['uri'])) 233 unset($header['uri']); 234 235 if(isset($header['content-location'])) 236 unset($header['content-location']); 237 238 unset($header['connection'], $header['keep-alive']); 239 240 if($response_code == 401 && isset($header['www-authenticate']) && preg_match("'basic\s+(?:realm=\"(.*?)\")?'i", $header['www-authenticate'], $matches)) { 241 242 unset($header['www-authenticate'], $this->_page); 243 244 if(isset($this->_auth[$matches[1]])) { 245 246 $this->_realm = $matches[1]; 247 $this->HTTP(); 248 } 249 250 else { 251 $GLOBALS['_config']['realm_name'] = $matches[1]; 252 print_template(TEMPLATE_HTTP_AUTH); 253 } 254 } 255 256 if($GLOBALS['_config']['request_page'] == 'raw') 257 $this->_page = $data; 258 259 else 260 $this->_headers = $header; 261 262 if($cache == true) { 263 264 switch(true) { 265 266 case ($response_code != 200): 267 case (isset($header['set-cookie'])): 268 case ($this->_no_cache === true): 269 break; 270 271 default: 272 $this->write_cache(); 273 break; 274 } 275 } 276 277 return true; 278 } 279 } 280 281 function output_page() { 282 283 global $_config; 284 285 if(is_array($this->_headers)) { 286 287 foreach($this->_headers as $k=>$v) { 288 289 if($k == 'content-type' && preg_match("'^text\/plain(?:\s*\;\s*(.*))?'i", $v, $encoding)) { 290 291 header('content-type: text/html'. (isset($encoding[1]) ? "; {$encoding}" : '')); 292 $this->_page = '<pre>' . htmlentities($this->_page) . '</pre>'; 293 continue; 294 } 295 296 if(is_array($v)) 297 foreach($v as $v2) { header("{$k}: {$v2}"); } 298 299 header("{$k}: {$v}"); 300 } 301 } 302 303 $url = $this->_url; 304 new Rewrite(array($url['base'], $url['base'] . $url['dir'] . '/'), $this->_page, $this->_content_type, $output); 305 print($output); 306 307 preg_match("'<title>(.*)?<\/title>'is", $this->_page, $title); 308 309 if($_config['force_title']) 310 $title = addcslashes(($_config['powered_by'] ? str_replace('{:title:}', ($title[1] ? html_entity_decode(preg_replace("'([\r\n]+\s*)'", " ", $_config['title'])) : $url['full']), $_config['powered_by_text']) : $_config['title']), "'"); 311 312 else 313 $title = addcslashes(($_config['powered_by'] ? str_replace('{:title:}', ($title[1] ? html_entity_decode(preg_replace("'([\r\n]+\s*)'", " ", $title[1])) : $url['full']), $_config['powered_by_text']) : $title[1]), "'"); 314 315 $url = addcslashes($url['full'], "'"); 316 317 print <<<OUTPUT 318 319 <script defer> 320 <!-- script added by bblocked <http://www.bblocked.org/> 321 322 // change title of document 323 top.document.title='{$title}'; 324 325 // change URL in bblocked form 326 top.headerFrame.document.f.{$GLOBALS['_config']['arg_url']}.value='{$url}'; 327 --> 328 </script> 329 330 OUTPUT; 331 } 332 } 333 334 ?>
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| Généré le : Tue Nov 20 20:31:26 2007 | par Balluche grâce à PHPXref 0.7 |
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