2 rcs_id('$Id: Request.php,v 1.72 2004-11-01 10:43:55 rurban Exp $');
4 Copyright (C) 2002,2004 $ThePhpWikiProgrammingTeam
6 This file is part of PhpWiki.
8 PhpWiki is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 PhpWiki is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with PhpWiki; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 // backward compatibility for PHP < 4.2.0
24 if (!function_exists('ob_clean')) {
35 $this->_fix_magic_quotes_gpc();
36 $this->_fix_multipart_form_data();
38 switch($this->get('REQUEST_METHOD')) {
41 $this->args = &$GLOBALS['HTTP_GET_VARS'];
44 $this->args = &$GLOBALS['HTTP_POST_VARS'];
47 $this->args = array();
51 $this->session = new Request_SessionVars;
52 $this->cookies = new Request_CookieVars;
55 if (! is_writeable(ACCESS_LOG)) {
57 (sprintf(_("%s is not writable."), _("The PhpWiki access log file"))
59 . sprintf(_("Please ensure that %s is writable, or redefine %s in config/config.ini."),
60 sprintf(_("the file '%s'"), ACCESS_LOG),
65 $this->_log_entry = & new Request_AccessLogEntry($this,
69 $GLOBALS['request'] = $this;
73 if (!empty($GLOBALS['HTTP_SERVER_VARS']))
74 $vars = &$GLOBALS['HTTP_SERVER_VARS'];
75 else // cgi or other servers than Apache
76 $vars = &$GLOBALS['HTTP_ENV_VARS'];
78 if (isset($vars[$key]))
83 $addr = $vars['REMOTE_ADDR'];
84 if (defined('ENABLE_REVERSE_DNS') && ENABLE_REVERSE_DNS)
85 return $vars[$key] = gethostbyaddr($addr);
93 function getArg($key) {
94 if (isset($this->args[$key]))
95 return $this->args[$key];
103 function setArg($key, $val) {
105 unset($this->args[$key]);
107 $this->args[$key] = $val;
110 // Well oh well. Do we really want to pass POST params back as GET?
111 function getURLtoSelf($args = false, $exclude = array()) {
112 $get_args = $this->args;
114 $get_args = array_merge($get_args, $args);
116 // Err... good point...
118 if ($this->isPost()) {
119 $exclude = array_merge($exclude, array('action','auth'));
120 //$get_args = $args; // or only the provided
122 trigger_error("Request::getURLtoSelf() should probably not be from POST",
127 foreach ($exclude as $ex) {
128 if (!empty($get_args[$ex])) unset($get_args[$ex]);
131 $pagename = $get_args['pagename'];
132 unset ($get_args['pagename']);
133 if (!empty($get_args['action']) and $get_args['action'] == 'browse')
134 unset($get_args['action']);
136 return WikiURL($pagename, $get_args);
140 return $this->get("REQUEST_METHOD") == "POST";
143 function isGetOrHead () {
144 return in_array($this->get('REQUEST_METHOD'),
145 array('GET', 'HEAD'));
148 function httpVersion() {
149 if (!preg_match('@HTTP\s*/\s*(\d+.\d+)@', $this->get('SERVER_PROTOCOL'), $m))
151 return (float) $m[1];
154 function redirect($url, $noreturn=true) {
155 $bogus = defined('DISABLE_HTTP_REDIRECT') and DISABLE_HTTP_REDIRECT;
158 header("Location: $url");
160 * "302 Found" is not really meant to be sent in response
161 * to a POST. Worse still, according to (both HTTP 1.0
162 * and 1.1) spec, the user, if it is sent, the user agent
163 * is supposed to use the same method to fetch the
164 * redirected URI as the original.
166 * That means if we redirect from a POST, the user-agent
167 * supposed to generate another POST. Not what we want.
168 * (We do this after a page save after all.)
170 * Fortunately, most/all browsers don't do that.
172 * "303 See Other" is what we really want. But it only
175 * FIXME: this is still not spec compliant for HTTP
178 $status = $this->httpVersion() >= 1.1 ? 303 : 302;
180 $this->setStatus($status);
184 include_once('lib/Template.php');
185 $this->discardOutput();
186 $tmpl = new Template('redirect', $this, array('REDIRECT_URL' => $url));
192 function redirect(url) {
193 if (typeof location.replace == 'function')
194 location.replace(url);
195 else if (typeof location.assign == 'function')
196 location.assign(url);
198 window.location = url;
200 redirect('" . addslashes($url) . "')");
204 /** Set validators for this response.
206 * This sets a (possibly incomplete) set of validators
209 * The validator set can be extended using appendValidators().
211 * When you're all done setting and appending validators, you
212 * must call checkValidators() to check them and set the
213 * appropriate headers in the HTTP response.
217 * $request->setValidators(array('pagename' => $pagename,
218 * '%mtime' => $rev->get('mtime')));
220 * // Wups... response content depends on $otherpage, too...
221 * $request->appendValidators(array('otherpage' => $otherpagerev->getPageName(),
222 * '%mtime' => $otherpagerev->get('mtime')));
224 * // After all validators have been set:
225 * $request->checkValidators();
227 function setValidators($validator_set) {
228 if (is_array($validator_set))
229 $validator_set = new HTTP_ValidatorSet($validator_set);
230 $this->_validators = $validator_set;
233 /** Append more validators for this response.
234 * i.e dependencies on other pages mtimes
235 * now it may be called in init also to simplify client code.
237 function appendValidators($validator_set) {
238 if (!isset($this->_validators)) {
239 $this->setValidators($validator_set);
242 $this->_validators->append($validator_set);
245 /** Check validators and set headers in HTTP response
247 * This sets the appropriate "Last-Modified" and "ETag"
248 * headers in the HTTP response.
250 * Additionally, if the validators match any(all) conditional
251 * headers in the HTTP request, this method will not return, but
252 * instead will send "304 Not Modified" or "412 Precondition
253 * Failed" (as appropriate) back to the client.
255 function checkValidators() {
256 $validators = &$this->_validators;
258 // Set validator headers
259 if ($this->_is_buffering_output or !headers_sent()) {
260 if (($etag = $validators->getETag()) !== false)
261 header("ETag: " . $etag->asString());
262 if (($mtime = $validators->getModificationTime()) !== false)
263 header("Last-Modified: " . Rfc1123DateTime($mtime));
265 // Set cache control headers
266 $this->cacheControl();
269 if (CACHE_CONTROL == 'NO_CACHE')
270 return; // don't check conditionals...
272 // Check conditional headers in request
273 $status = $validators->checkConditionalRequest($this);
275 // Return short response due to failed conditionals
276 $this->setStatus($status);
278 $this->discardOutput();
284 /** Set the cache control headers in the HTTP response.
286 function cacheControl($strategy=CACHE_CONTROL, $max_age=CACHE_CONTROL_MAX_AGE) {
287 if ($strategy == 'NO_CACHE') {
288 $cache_control = "no-cache";
291 elseif ($strategy == 'ALLOW_STALE' && $max_age > 0) {
292 $cache_control = sprintf("max-age=%d", $max_age);
295 $cache_control = "must-revalidate";
298 header("Cache-Control: $cache_control");
299 header("Expires: " . Rfc1123DateTime(time() + $max_age));
300 header("Vary: Cookie"); // FIXME: add more here?
303 function setStatus($status) {
304 if (preg_match('|^HTTP/.*?\s(\d+)|i', $status, $m)) {
309 $status = (integer) $status;
310 $reason = array('200' => 'OK',
312 '303' => 'See Other',
313 '304' => 'Not Modified',
314 '400' => 'Bad Request',
315 '401' => 'Unauthorized',
316 '403' => 'Forbidden',
317 '404' => 'Not Found',
318 '412' => 'Precondition Failed');
319 // FIXME: is it always okay to send HTTP/1.1 here, even for older clients?
320 header(sprintf("HTTP/1.1 %d %s", $status, $reason[$status]));
323 if (isset($this->_log_entry))
324 $this->_log_entry->setStatus($status);
327 function buffer_output($compress = true) {
328 // USECACHE = false turns off ob buffering also for now. (sf.net)
329 // FIXME: disables sessions (some byte before all headers_sent())
330 /*if (defined('USECACHE') and !USECACHE) {
331 $this->_is_buffering_output = false;
334 if (defined('COMPRESS_OUTPUT')) {
335 if (!COMPRESS_OUTPUT)
338 elseif (!check_php_version(4,2,3))
340 elseif (isCGI()) // necessary?
343 if ($this->getArg('start_debug'))
345 // Should we compress even when apache_note is not available?
346 // sf.net bug #933183 and http://bugs.php.net/17557
347 // This effectively eliminates CGI, but all other servers also. hmm.
349 and (!function_exists('ob_gzhandler')
350 or !function_exists('apache_note')))
352 // http://www.php.net/ob_gzhandler "output handler 'ob_gzhandler' cannot be used twice"
353 if ($compress and ini_get("zlib.output_compression"))
356 // New: we check for the client Accept-Encoding: "gzip" presence also
357 // This should eliminate a lot or reported problems.
359 and (!$this->get("HTTP_ACCEPT_ENCODING")
360 or !strstr($this->get("HTTP_ACCEPT_ENCODING"), "gzip")))
363 // Most RSS clients are NOT(!) application/xml gzip compatible yet.
364 // Even if they are sending the accept-encoding gzip header!
365 // wget is, Mozilla, and MSIE no.
366 // Of the RSS readers only MagpieRSS 0.5.2 is. http://www.rssgov.com/rssparsers.html
367 // See also http://phpwiki.sourceforge.net/phpwiki/KnownBugs
369 and $this->getArg('format')
370 and strstr($this->getArg('format'), 'rss'))
374 ob_start('ob_gzhandler');
376 * Attempt to prevent Apache from doing the dreaded double-gzip.
378 * It would be better if we could detect when apache was going
379 * to zip for us, and then let it ... but I have yet to figure
380 * out how to do that.
382 if (function_exists('apache_note'))
383 @apache_note('no-gzip', 1);
386 // Now we alway buffer output.
387 // This is so we can set HTTP headers (e.g. for redirect)
389 // FIXME: change the name of this method.
392 $this->_is_buffering_output = true;
393 $this->_ob_get_length = 0;
396 function discardOutput() {
397 if (!empty($this->_is_buffering_output)) {
399 $this->_is_buffering_output = false;
401 trigger_error("Not buffering output", E_USER_NOTICE);
406 * Longer texts need too much memory on tiny or memory-limit=8MB systems.
407 * We might want to flush our buffer and restart again.
408 * (This would be fine if php would release its memory)
409 * Note that this must not be called inside Template expansion or other
410 * sections with ob_buffering.
412 function chunkOutput() {
413 if (!empty($this->_is_buffering_output) or
414 (function_exists('ob_get_level') and @ob_get_level())) {
415 $this->_do_chunked_output = true;
416 $this->_ob_get_length += ob_get_length();
417 while (@ob_end_flush());
424 session_write_close();
425 if (!empty($this->_is_buffering_output)) {
426 /* This cannot work because it might destroy xml markup */
428 if (0 and $GLOBALS['SearchHighLightQuery'] and check_php_version(4,2)) {
429 $html = str_replace($GLOBALS['SearchHighLightQuery'],
430 '<span class="search-term">'.$GLOBALS['SearchHighLightQuery'].'</span>',
433 header(sprintf("Content-Length: %d", strlen($html)));
437 if (empty($this->_do_chunked_output)) {
438 header(sprintf("Content-Length: %d", ob_get_length()));
440 header(sprintf("Content-Length: %d", $this->ob_get_length));
443 while (@ob_end_flush());
444 $this->_is_buffering_output = false;
449 function getSessionVar($key) {
450 return $this->session->get($key);
452 function setSessionVar($key, $val) {
453 return $this->session->set($key, $val);
455 function deleteSessionVar($key) {
456 return $this->session->delete($key);
459 function getCookieVar($key) {
460 return $this->cookies->get($key);
462 function setCookieVar($key, $val, $lifetime_in_days = false, $path = false) {
463 return $this->cookies->set($key, $val, $lifetime_in_days, $path);
465 function deleteCookieVar($key) {
466 return $this->cookies->delete($key);
469 function getUploadedFile($key) {
470 return Request_UploadedFile::getUploadedFile($key);
474 function _fix_magic_quotes_gpc() {
475 $needs_fix = array('HTTP_POST_VARS',
482 if (get_magic_quotes_gpc()) {
483 foreach ($needs_fix as $vars)
484 $this->_stripslashes($GLOBALS[$vars]);
488 function _stripslashes(&$var) {
489 if (is_array($var)) {
490 foreach ($var as $key => $val)
491 $this->_stripslashes($var[$key]);
493 elseif (is_string($var))
494 $var = stripslashes($var);
497 function _fix_multipart_form_data () {
498 if (preg_match('|^multipart/form-data|', $this->get('CONTENT_TYPE')))
499 $this->_strip_leading_nl($GLOBALS['HTTP_POST_VARS']);
502 function _strip_leading_nl(&$var) {
503 if (is_array($var)) {
504 foreach ($var as $key => $val)
505 $this->_strip_leading_nl($var[$key]);
507 elseif (is_string($var))
508 $var = preg_replace('|^\r?\n?|', '', $var);
512 class Request_SessionVars {
513 function Request_SessionVars() {
514 // Prevent cacheing problems with IE 5
515 session_cache_limiter('none');
517 // Avoid to get a notice if session is already started,
518 // for example if session.auto_start is activated
524 $vars = &$GLOBALS['HTTP_SESSION_VARS'];
525 if (isset($vars[$key]))
530 function set($key, $val) {
531 $vars = &$GLOBALS['HTTP_SESSION_VARS'];
532 if (!function_usable('get_cfg_var') or get_cfg_var('register_globals')) {
533 // This is funky but necessary, at least in some PHP's
534 $GLOBALS[$key] = $val;
537 if (isset($_SESSION))
538 $_SESSION[$key] = $val;
539 session_register($key);
542 function delete($key) {
543 $vars = &$GLOBALS['HTTP_SESSION_VARS'];
544 if (!function_usable('ini_get') or ini_get('register_globals'))
545 unset($GLOBALS[$key]);
546 if (DEBUG) trigger_error("delete session $key",E_USER_WARNING);
548 session_unregister($key);
552 class Request_CookieVars {
555 $vars = &$GLOBALS['HTTP_COOKIE_VARS'];
556 if (isset($vars[$key])) {
557 @$val = unserialize(base64_decode($vars[$key]));
560 @$val = urldecode($vars[$key]);
567 function get_old($key) {
568 $vars = &$GLOBALS['HTTP_COOKIE_VARS'];
569 if (isset($vars[$key])) {
570 @$val = unserialize(base64_decode($vars[$key]));
573 @$val = unserialize($vars[$key]);
583 function set($key, $val, $persist_days = false, $path = false) {
584 // if already defined, ignore
585 if (defined('MAIN_setUser') and $key = 'WIKI_ID') return;
586 $vars = &$GLOBALS['HTTP_COOKIE_VARS'];
587 if (is_numeric($persist_days)) {
588 $expires = time() + (24 * 3600) * $persist_days;
593 if (is_array($val) or is_object($val))
594 $packedval = base64_encode(serialize($val));
596 $packedval = urlencode($val);
597 $vars[$key] = $packedval;
599 @setcookie($key, $packedval, $expires, $path);
601 @setcookie($key, $packedval, $expires);
604 function delete($key) {
605 static $deleted = array();
606 if (isset($deleted[$key])) return;
607 $vars = &$GLOBALS['HTTP_COOKIE_VARS'];
608 if (!defined('COOKIE_DOMAIN'))
609 @setcookie($key,'',0);
610 @setcookie($key,'',0,defined('COOKIE_DOMAIN') ? COOKIE_DOMAIN : '/');
612 unset($GLOBALS['HTTP_COOKIE_VARS'][$key]);
619 You must set "upload_tmp_dir" = "/tmp/" or "C:/tmp/"
620 Best on the same drive as apache, with forward slashes
621 and with ending slash!
622 Otherwise "\\" => "" and the uploaded file will not be found.
624 class Request_UploadedFile {
625 function getUploadedFile($postname) {
626 global $HTTP_POST_FILES;
628 if (!isset($HTTP_POST_FILES[$postname]))
631 $fileinfo = &$HTTP_POST_FILES[$postname];
632 if ($fileinfo['error']) {
633 // errmsgs by Shilad Sen
634 switch ($HTTP_POST_FILES['userfile']['error']) {
636 trigger_error(_("Upload error: file too big"), E_USER_ERROR);
639 trigger_error(_("Upload error: file too big"), E_USER_ERROR);
642 trigger_error(_("Upload error: file only partially recieved"), E_USER_ERROR);
645 trigger_error(_("Upload error: no file selected"), E_USER_ERROR);
648 trigger_error(_("Upload error: unknown error #") . $fileinfo['error'], E_USER_ERROR);
654 // With windows/php 4.2.1 is_uploaded_file() always returns false.
655 // Be sure that upload_tmp_dir ends with a slash!
656 if (!is_uploaded_file($fileinfo['tmp_name'])) {
658 if (!$tmp_file = get_cfg_var('upload_tmp_dir')) {
659 $tmp_file = dirname(tempnam('', ''));
661 $tmp_file .= '/' . basename($fileinfo['tmp_name']);
662 /* but ending slash in php.ini upload_tmp_dir is required. */
663 if (ereg_replace('/+', '/', $tmp_file) != $fileinfo['tmp_name']) {
664 trigger_error(sprintf("Uploaded tmpfile illegal: %s != %s.",$tmp_file, $fileinfo['tmp_name']).
666 "Probably illegal TEMP environment or upload_tmp_dir setting.",
671 trigger_error(sprintf("Workaround for PHP/Windows is_uploaded_file() problem for %s.",
672 $fileinfo['tmp_name'])."\n".
673 "Probably illegal TEMP environment or upload_tmp_dir setting.",
679 trigger_error(sprintf("Uploaded tmpfile %s not found.",$fileinfo['tmp_name'])."\n".
680 " Probably illegal TEMP environment or upload_tmp_dir setting.",
684 return new Request_UploadedFile($fileinfo);
687 function Request_UploadedFile($fileinfo) {
688 $this->_info = $fileinfo;
692 return $this->_info['size'];
696 return $this->_info['name'];
700 return $this->_info['type'];
703 function getTmpName() {
704 return $this->_info['tmp_name'];
708 if ( ($fd = fopen($this->_info['tmp_name'], "rb")) ) {
709 if ($this->getSize() < filesize($this->_info['tmp_name'])) {
710 // FIXME: Some PHP's (or is it some browsers?) put
711 // HTTP/MIME headers in the file body, some don't.
713 // At least, I think that's the case. I know I used
714 // to need this code, now I don't.
716 // This code is more-or-less untested currently.
718 // Dump HTTP headers.
719 while ( ($header = fgets($fd, 4096)) ) {
720 if (trim($header) == '') {
723 else if (!preg_match('/^content-(length|type):/i', $header)) {
733 function getContents() {
735 $data = fread($fd, $this->getSize());
742 * Create NCSA "combined" log entry for current request.
744 class Request_AccessLogEntry
749 * The log entry will be automatically appended to the log file
750 * when the current request terminates.
752 * If you want to modify a Request_AccessLogEntry before it gets
753 * written (e.g. via the setStatus and setSize methods) you should
754 * use an '&' on the constructor, so that you're working with the
755 * original (rather than a copy) object.
758 * $log_entry = & new Request_AccessLogEntry($req, "/tmp/wiki_access_log");
759 * $log_entry->setStatus(401);
763 * @param $request object Request object for current request.
764 * @param $logfile string Log file name.
766 function Request_AccessLogEntry (&$request, $logfile) {
767 $this->logfile = $logfile;
769 $this->host = $request->get('REMOTE_HOST');
770 $this->ident = $request->get('REMOTE_IDENT');
773 $this->user = '-'; // FIXME: get logged-in user name
774 $this->time = time();
775 $this->request = join(' ', array($request->get('REQUEST_METHOD'),
776 $request->get('REQUEST_URI'),
777 $request->get('SERVER_PROTOCOL')));
780 $this->referer = (string) $request->get('HTTP_REFERER');
781 $this->user_agent = (string) $request->get('HTTP_USER_AGENT');
783 global $Request_AccessLogEntry_entries;
784 if (!isset($Request_AccessLogEntry_entries)) {
785 register_shutdown_function("Request_AccessLogEntry_shutdown_function");
787 $Request_AccessLogEntry_entries[] = &$this;
791 * Set result status code.
793 * @param $status integer HTTP status code.
795 function setStatus ($status) {
796 $this->status = $status;
802 * @param $size integer
804 function setSize ($size) {
809 * Get time zone offset.
811 * This is a static member function.
813 * @param $time integer Unix timestamp (defaults to current time).
814 * @return string Zone offset, e.g. "-0800" for PST.
816 function _zone_offset ($time = false) {
819 $offset = date("Z", $time);
825 $offhours = floor($offset / 3600);
826 $offmins = $offset / 60 - $offhours * 60;
827 return sprintf("%s%02d%02d", $negoffset, $offhours, $offmins);
831 * Format time in NCSA format.
833 * This is a static member function.
835 * @param $time integer Unix timestamp (defaults to current time).
836 * @return string Formatted date & time.
838 function _ncsa_time($time = false) {
842 return date("d/M/Y:H:i:s", $time) .
843 " " . $this->_zone_offset();
847 * Write entry to log file.
850 $entry = sprintf('%s %s %s [%s] "%s" %d %d "%s" "%s"',
851 $this->host, $this->ident, $this->user,
852 $this->_ncsa_time($this->time),
853 $this->request, $this->status, $this->size,
854 $this->referer, $this->user_agent);
856 //Error log doesn't provide locking.
857 //error_log("$entry\n", 3, $this->logfile);
860 if (($fp = fopen($this->logfile, "a"))) {
862 fputs($fp, "$entry\n");
872 * @see Request_AccessLogEntry
874 function Request_AccessLogEntry_shutdown_function ()
876 global $Request_AccessLogEntry_entries;
878 foreach ($Request_AccessLogEntry_entries as $entry) {
881 unset($Request_AccessLogEntry_entries);
886 function HTTP_ETag($val, $is_weak=false) {
887 $this->_val = hash($val);
888 $this->_weak = $is_weak;
893 * Strong comparison: If either (or both) tag is weak, they
896 function equals($that, $strong_match=false) {
897 if ($this->_val != $that->_val)
899 if ($strong_match and ($this->_weak or $that->_weak))
905 function asString() {
906 $quoted = '"' . addslashes($this->_val) . '"';
907 return $this->_weak ? "W/$quoted" : $quoted;
910 /** Parse tag from header.
912 * This is a static member function.
914 function parse($strval) {
915 if (!preg_match(':^(W/)?"(.+)"$:i', trim($strval), $m))
916 return false; // parse failed
917 list(,$weak,$str) = $m;
918 return new HTTP_ETag(stripslashes($str), $weak);
921 function matches($taglist, $strong_match=false) {
922 $taglist = trim($taglist);
924 if ($taglist == '*') {
926 return ! $this->_weak;
931 while (preg_match('@^(W/)?"((?:\\\\.|[^"])*)"\s*,?\s*@i',
933 list($match, $weak, $str) = $m;
934 $taglist = substr($taglist, strlen($match));
935 $tag = new HTTP_ETag(stripslashes($str), $weak);
936 if ($this->equals($tag, $strong_match)) {
944 // Possible results from the HTTP_ValidatorSet::_check*() methods.
945 // (Higher numerical values take precedence.)
946 define ('_HTTP_VAL_PASS', 0); // Test is irrelevant
947 define ('_HTTP_VAL_NOT_MODIFIED', 1); // Test passed, content not changed
948 define ('_HTTP_VAL_MODIFIED', 2); // Test failed, content changed
949 define ('_HTTP_VAL_FAILED', 3); // Precondition failed.
951 class HTTP_ValidatorSet {
952 function HTTP_ValidatorSet($validators) {
953 $this->_mtime = $this->_weak = false;
954 $this->_tag = array();
956 foreach ($validators as $key => $val) {
957 if ($key == '%mtime') {
958 $this->_mtime = $val;
960 elseif ($key == '%weak') {
965 $this->_tag[$key] = $val;
970 function append($that) {
972 $that = new HTTP_ValidatorSet($that);
974 // Pick the most recent mtime
975 if (isset($that->_mtime))
976 if (!isset($this->_mtime) || $that->_mtime > $this->_mtime)
977 $this->_mtime = $that->_mtime;
979 // If either is weak, we're weak
980 if (!empty($that->_weak))
982 if (is_array($this->_tag))
983 $this->_tag = array_merge($this->_tag, $that->_tag);
985 $this->_tag = $that->_tag;
991 return new HTTP_ETag($this->_tag, $this->_weak);
994 function getModificationTime() {
995 return $this->_mtime;
998 function checkConditionalRequest (&$request) {
999 $result = max($this->_checkIfUnmodifiedSince($request),
1000 $this->_checkIfModifiedSince($request),
1001 $this->_checkIfMatch($request),
1002 $this->_checkIfNoneMatch($request));
1004 if ($result == _HTTP_VAL_PASS || $result == _HTTP_VAL_MODIFIED)
1005 return false; // "please proceed with normal processing"
1006 elseif ($result == _HTTP_VAL_FAILED)
1007 return 412; // "412 Precondition Failed"
1008 elseif ($result == _HTTP_VAL_NOT_MODIFIED)
1009 return 304; // "304 Not Modified"
1011 trigger_error("Ack, shouldn't get here", E_USER_ERROR);
1015 function _checkIfUnmodifiedSince(&$request) {
1016 if ($this->_mtime !== false) {
1017 $since = ParseRfc1123DateTime($request->get("HTTP_IF_UNMODIFIED_SINCE"));
1018 if ($since !== false && $this->_mtime > $since)
1019 return _HTTP_VAL_FAILED;
1021 return _HTTP_VAL_PASS;
1024 function _checkIfModifiedSince(&$request) {
1025 if ($this->_mtime !== false and $request->isGetOrHead()) {
1026 $since = ParseRfc1123DateTime($request->get("HTTP_IF_MODIFIED_SINCE"));
1027 if ($since !== false) {
1028 if ($this->_mtime <= $since)
1029 return _HTTP_VAL_NOT_MODIFIED;
1030 return _HTTP_VAL_MODIFIED;
1033 return _HTTP_VAL_PASS;
1036 function _checkIfMatch(&$request) {
1037 if ($this->_tag && ($taglist = $request->get("HTTP_IF_MATCH"))) {
1038 $tag = $this->getETag();
1039 if (!$tag->matches($taglist, 'strong'))
1040 return _HTTP_VAL_FAILED;
1042 return _HTTP_VAL_PASS;
1045 function _checkIfNoneMatch(&$request) {
1046 if ($this->_tag && ($taglist = $request->get("HTTP_IF_NONE_MATCH"))) {
1047 $tag = $this->getETag();
1048 $strong_compare = ! $request->isGetOrHead();
1050 if ($tag->matches($taglist, $strong_compare)) {
1051 if ($request->isGetOrHead())
1052 return _HTTP_VAL_NOT_MODIFIED;
1054 return _HTTP_VAL_FAILED;
1056 return _HTTP_VAL_MODIFIED;
1059 return _HTTP_VAL_PASS;
1064 // $Log: not supported by cvs2svn $
1065 // Revision 1.71 2004/10/22 09:20:36 rurban
1066 // fix for USECACHE=false
1068 // Revision 1.70 2004/10/21 19:59:18 rurban
1069 // Patch #991494 (ppo): Avoid notice in PHP >= 4.3.3 if session already started
1071 // Revision 1.69 2004/10/21 19:00:37 rurban
1072 // upload errmsgs by Shilad Sen.
1073 // chunkOutput support: flush the buffer piecewise (dumphtml, large pagelists)
1074 // doesn't gain much because ob_end_clean() doesn't release its
1075 // memory properly yet.
1077 // Revision 1.68 2004/10/12 13:13:19 rurban
1078 // php5 compatibility (5.0.1 ok)
1080 // Revision 1.67 2004/09/25 18:56:54 rurban
1081 // make start_debug logic work
1083 // Revision 1.66 2004/09/25 16:24:52 rurban
1084 // dont compress on debugging
1086 // Revision 1.65 2004/09/17 14:13:49 rurban
1087 // We check for the client Accept-Encoding: "gzip" presence also
1088 // This should eliminate a lot or reported problems.
1090 // Note that this doesn#t fix RSS ssues:
1091 // Most RSS clients are NOT(!) application/xml gzip compatible yet.
1092 // Even if they are sending the accept-encoding gzip header!
1093 // wget is, Mozilla, and MSIE no.
1094 // Of the RSS readers only MagpieRSS 0.5.2 is. http://www.rssgov.com/rssparsers.html
1096 // Revision 1.64 2004/09/17 13:32:36 rurban
1097 // Disable server-side gzip encoding for RSS (RDF encoding), even if the client says it
1098 // supports it. Mozilla has this error, wget works fine. IE not checked.
1100 // Revision 1.63 2004/07/01 09:29:40 rurban
1101 // fixed another DbSession crash: wrong WikiGroup vars
1103 // Revision 1.62 2004/06/27 10:26:02 rurban
1104 // oci8 patch by Philippe Vanhaesendonck + some ADODB notes+fixes
1106 // Revision 1.61 2004/06/25 14:29:17 rurban
1107 // WikiGroup refactoring:
1108 // global group attached to user, code for not_current user.
1109 // improved helpers for special groups (avoid double invocations)
1110 // new experimental config option ENABLE_XHTML_XML (fails with IE, and document.write())
1111 // fixed a XHTML validation error on userprefs.tmpl
1113 // Revision 1.60 2004/06/19 11:51:13 rurban
1114 // CACHE_CONTROL: NONE => NO_CACHE
1116 // Revision 1.59 2004/06/13 11:34:22 rurban
1117 // fixed bug #969532 (space in uploaded filenames)
1118 // improved upload error messages
1120 // Revision 1.58 2004/06/04 20:32:53 rurban
1121 // Several locale related improvements suggested by Pierrick Meignen
1122 // LDAP fix by John Cole
1123 // reanable admin check without ENABLE_PAGEPERM in the admin plugins
1125 // Revision 1.57 2004/06/03 18:54:25 rurban
1126 // fixed "lost level in session" warning, now that signout sets level = 0 (before -1)
1128 // Revision 1.56 2004/05/17 17:43:29 rurban
1129 // CGI: no PATH_INFO fix
1131 // Revision 1.55 2004/05/15 18:31:00 rurban
1132 // some action=pdf Request fixes: With MSIE it works now. Now the work with the page formatting begins.
1134 // Revision 1.54 2004/05/04 22:34:25 rurban
1137 // Revision 1.53 2004/05/03 21:57:47 rurban
1138 // locale updates: we previously lost some words because of wrong strings in
1139 // PhotoAlbum, german rewording.
1140 // fixed $_SESSION registering (lost session vars, esp. prefs)
1141 // fixed ending slash in listAvailableLanguages/Themes
1143 // Revision 1.52 2004/05/03 13:16:47 rurban
1144 // fixed UserPreferences update, esp for boolean and int
1146 // Revision 1.51 2004/05/02 21:26:38 rurban
1147 // limit user session data (HomePageHandle and auth_dbi have to invalidated anyway)
1148 // because they will not survive db sessions, if too large.
1149 // extended action=upgrade
1150 // some WikiTranslation button work
1151 // revert WIKIAUTH_UNOBTAINABLE (need it for main.php)
1152 // some temp. session debug statements
1154 // Revision 1.50 2004/04/29 19:39:44 rurban
1155 // special support for formatted plugins (one-liners)
1156 // like <small><plugin BlaBla ></small>
1157 // iter->asArray() helper for PopularNearby
1158 // db_session for older php's (no &func() allowed)
1160 // Revision 1.49 2004/04/26 20:44:34 rurban
1161 // locking table specific for better databases
1163 // Revision 1.48 2004/04/13 09:13:50 rurban
1164 // sf.net bug #933183 and http://bugs.php.net/17557
1165 // disable ob_gzhandler if apache_note cannot be used.
1166 // (conservative until we find why)
1168 // Revision 1.47 2004/04/02 15:06:55 rurban
1169 // fixed a nasty ADODB_mysql session update bug
1170 // improved UserPreferences layout (tabled hints)
1171 // fixed UserPreferences auth handling
1172 // improved auth stability
1173 // improved old cookie handling: fixed deletion of old cookies with paths
1175 // Revision 1.46 2004/03/30 02:14:03 rurban
1176 // fixed yet another Prefs bug
1177 // added generic PearDb_iter
1178 // $request->appendValidators no so strict as before
1179 // added some box plugin methods
1180 // PageList commalist for condensed output
1182 // Revision 1.45 2004/03/24 19:39:02 rurban
1183 // php5 workaround code (plus some interim debugging code in XmlElement)
1184 // php5 doesn't work yet with the current XmlElement class constructors,
1185 // WikiUserNew does work better than php4.
1186 // rewrote WikiUserNew user upgrading to ease php5 update
1187 // fixed pref handling in WikiUserNew
1188 // added Email Notification
1189 // added simple Email verification
1190 // removed emailVerify userpref subclass: just a email property
1191 // changed pref binary storage layout: numarray => hash of non default values
1192 // print optimize message only if really done.
1193 // forced new cookie policy: delete pref cookies, use only WIKI_ID as plain string.
1194 // prefs should be stored in db or homepage, besides the current session.
1196 // Revision 1.44 2004/03/14 16:26:22 rurban
1199 // Revision 1.43 2004/03/12 20:59:17 rurban
1200 // important cookie fix by Konstantin Zadorozhny
1201 // new editpage feature: JS_SEARCHREPLACE
1203 // Revision 1.42 2004/03/10 15:38:48 rurban
1204 // store current user->page and ->action in session for WhoIsOnline
1205 // better WhoIsOnline icon
1206 // fixed WhoIsOnline warnings
1208 // Revision 1.41 2004/02/27 01:25:14 rurban
1209 // Workarounds for upload handling
1211 // Revision 1.40 2004/02/26 01:39:51 rurban
1214 // Revision 1.39 2004/02/24 15:14:57 rurban
1215 // fixed action=upload problems on Win32, and remove Merge Edit buttons: file does not exist anymore
1217 // Revision 1.38 2004/01/25 10:26:02 rurban
1218 // fixed bug [ 541193 ] HTTP_SERVER_VARS are Apache specific
1219 // http://sourceforge.net/tracker/index.php?func=detail&aid=541193&group_id=6121&atid=106121
1220 // CGI and other servers than apache populate _ENV and not _SERVER
1222 // Revision 1.37 2003/12/26 06:41:16 carstenklapp
1223 // Bugfix: Try to defer OS errors about session.save_path and ACCESS_LOG,
1224 // so they don't prevent IE from partially (or not at all) rendering the
1225 // page. This should help a little for the IE user who encounters trouble
1226 // when setting up a new PhpWiki for the first time.
1232 // c-basic-offset: 4
1233 // c-hanging-comment-ender-p: nil
1234 // indent-tabs-mode: nil