<?php
/**
+ * Response handler for Ajax requests.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
* @file
* @ingroup Ajax
*/
-if ( !defined( 'MEDIAWIKI' ) ) {
- die( 1 );
-}
-
/**
* Handle responses for Ajax requests (send headers, print
* content, that sort of thing)
*/
class AjaxResponse {
- /** Number of seconds to get the response cached by a proxy */
+ /**
+ * Number of seconds to get the response cached by a proxy
+ * @var int $mCacheDuration
+ */
private $mCacheDuration;
- /** HTTP header Content-Type */
+ /**
+ * HTTP header Content-Type
+ * @var string $mContentType
+ */
private $mContentType;
- /** Disables output. Can be set by calling $AjaxResponse->disable() */
+ /**
+ * Disables output. Can be set by calling $AjaxResponse->disable()
+ * @var bool $mDisabled
+ */
private $mDisabled;
- /** Date for the HTTP header Last-modified */
+ /**
+ * Date for the HTTP header Last-modified
+ * @var string|false $mLastModified
+ */
private $mLastModified;
- /** HTTP response code */
+ /**
+ * HTTP response code
+ * @var string $mResponseCode
+ */
private $mResponseCode;
- /** HTTP Vary header */
+ /**
+ * HTTP Vary header
+ * @var string $mVary
+ */
private $mVary;
- /** Content of our HTTP response */
+ /**
+ * Content of our HTTP response
+ * @var string $mText
+ */
private $mText;
+ /**
+ * @param $text string|null
+ */
function __construct( $text = null ) {
$this->mCacheDuration = null;
$this->mVary = null;
}
}
+ /**
+ * Set the number of seconds to get the response cached by a proxy
+ * @param $duration int
+ */
function setCacheDuration( $duration ) {
$this->mCacheDuration = $duration;
}
+ /**
+ * Set the HTTP Vary header
+ * @param $vary string
+ */
function setVary( $vary ) {
$this->mVary = $vary;
}
+ /**
+ * Set the HTTP response code
+ * @param $code string
+ */
function setResponseCode( $code ) {
$this->mResponseCode = $code;
}
+ /**
+ * Set the HTTP header Content-Type
+ * @param $type string
+ */
function setContentType( $type ) {
$this->mContentType = $type;
}
+ /**
+ * Disable output.
+ */
function disable() {
$this->mDisabled = true;
}
- /** Add content to the response */
+ /**
+ * Add content to the response
+ * @param $text string
+ */
function addText( $text ) {
if ( ! $this->mDisabled && $text ) {
$this->mText .= $text;
}
}
- /** Output text */
+ /**
+ * Output text
+ */
function printText() {
if ( ! $this->mDisabled ) {
print $this->mText;
}
}
- /** Construct the header and output it */
+ /**
+ * Construct the header and output it
+ */
function sendHeaders() {
global $wgUseSquid, $wgUseESI;
if ( $this->mLastModified ) {
header ( "Last-Modified: " . $this->mLastModified );
- }
- else {
+ } else {
header ( "Last-Modified: " . gmdate( "D, d M Y H:i:s" ) . " GMT" );
}
if ( $this->mCacheDuration ) {
-
# If squid caches are configured, tell them to cache the response,
# and tell the client to always check with the squid. Otherwise,
# tell the client to use a cached copy, without a way to purge it.
if ( $wgUseSquid ) {
-
# Expect explicite purge of the proxy cache, but require end user agents
# to revalidate against the proxy on each visit.
# Surrogate-Control controls our Squid, Cache-Control downstream caches
# Let the client do the caching. Cache is not purged.
header ( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $this->mCacheDuration ) . " GMT" );
- header ( "Cache-Control: s-max-age={$this->mCacheDuration},public,max-age={$this->mCacheDuration}" );
+ header ( "Cache-Control: s-maxage={$this->mCacheDuration},public,max-age={$this->mCacheDuration}" );
}
} else {
/**
* checkLastModified tells the client to use the client-cached response if
* possible. If sucessful, the AjaxResponse is disabled so that
- * any future call to AjaxResponse::printText() have no effect. The method
- * returns true iff the response code was set to 304 Not Modified.
+ * any future call to AjaxResponse::printText() have no effect.
+ *
+ * @param $timestamp string
+ * @return bool Returns true if the response code was set to 304 Not Modified.
*/
function checkLastModified ( $timestamp ) {
global $wgCachePages, $wgCacheEpoch, $wgUser;
if ( !$timestamp || $timestamp == '19700101000000' ) {
wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
- return;
+ return false;
}
+
if ( !$wgCachePages ) {
wfDebug( "$fname: CACHE DISABLED\n", false );
- return;
+ return false;
}
+
if ( $wgUser->getOption( 'nocache' ) ) {
wfDebug( "$fname: USER DISABLED CACHE\n", false );
- return;
+ return false;
}
$timestamp = wfTimestamp( TS_MW, $timestamp );
- $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
+ $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->getTouched(), $wgCacheEpoch ) );
if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
# IE sends sizes after the date like this:
$ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
wfDebug( "$fname: -- we might send Last-Modified : $lastmod\n", false );
+
if ( ( $ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
ini_set( 'zlib.output_compression', 0 );
$this->setResponseCode( "304 Not Modified" );
$this->disable();
$this->mLastModified = $lastmod;
- wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
+ wfDebug( "$fname: CACHED client: $ismodsince ; user: {$wgUser->getTouched()} ; page: $timestamp ; site $wgCacheEpoch\n", false );
return true;
} else {
- wfDebug( "$fname: READY client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
+ wfDebug( "$fname: READY client: $ismodsince ; user: {$wgUser->getTouched()} ; page: $timestamp ; site $wgCacheEpoch\n", false );
$this->mLastModified = $lastmod;
}
} else {
wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
$this->mLastModified = $lastmod;
}
+ return false;
}
+ /**
+ * @param $mckey string
+ * @param $touched int
+ * @return bool
+ */
function loadFromMemcached( $mckey, $touched ) {
global $wgMemc;
- if ( !$touched ) return false;
+
+ if ( !$touched ) {
+ return false;
+ }
$mcvalue = $wgMemc->get( $mckey );
if ( $mcvalue ) {
if ( $touched <= $mcvalue['timestamp'] ) {
wfDebug( "Got $mckey from cache\n" );
$this->mText = $mcvalue['value'];
+
return true;
} else {
wfDebug( "$mckey has expired\n" );
return false;
}
+ /**
+ * @param $mckey string
+ * @param $expiry int
+ * @return bool
+ */
function storeInMemcached( $mckey, $expiry = 86400 ) {
global $wgMemc;