X-Git-Url: http://git.heureux-cyclage.org/?a=blobdiff_plain;f=thumb_handler.php;h=e2b165b8a95b72812910b83fa4e47a77748a97ae;hb=021ed39d59b3a2edcaea70edb03778eb0bdc36d4;hp=073a87929e0550ebb76fac513f0d411f17092b2d;hpb=87382f33808f5ad4bf8fb6a4a07ef6e1a775e7cc;p=lhc%2Fweb%2Fwiklou.git

diff --git a/thumb_handler.php b/thumb_handler.php
index 073a87929e..e2b165b8a9 100644
--- a/thumb_handler.php
+++ b/thumb_handler.php
@@ -1,264 +1,29 @@
 <?php
-
-# Valid web server entry point
-define( 'THUMB_HANDLER', true );
-
-# Load thumb-handler configuration. Avoids WebStart.php for performance.
-if ( !file_exists( dirname( __FILE__ ) . "/thumb.config.php" ) ) {
-	die( "thumb_handler.php is not enabled for this wiki.\n" );
-}
-require( dirname( __FILE__ ) . "/thumb.config.php" );
-
-# Execute thumb.php if not handled via cURL
-if ( wfHandleThumb404Main() === 'wfThumbMain' ) {
-	require( dirname( __FILE__ ) . '/thumb.php' );
-}
-
-function wfHandleThumb404Main() {
-	global $thgThumbCallbacks, $thgThumbCurlConfig;
-
-	# lighttpd puts the original request in REQUEST_URI, while
-	# sjs sets that to the 404 handler, and puts the original
-	# request in REDIRECT_URL.
-	if ( isset( $_SERVER['REDIRECT_URL'] ) ) {
-		# The URL is un-encoded, so put it back how it was.
-		$uri = str_replace( "%2F", "/", urlencode( $_SERVER['REDIRECT_URL'] ) );
-	} else {
-		$uri = $_SERVER['REQUEST_URI'];
-	}
-
-	# Extract thumb.php params from the URI...
-	if ( isset( $thgThumbCallbacks['extractParams'] )
-		&& is_callable( $thgThumbCallbacks['extractParams'] ) ) // overridden by configuration?
-	{
-		$params = call_user_func_array( $thgThumbCallbacks['extractParams'], array( $uri ) );
-	} else {
-		$params = wfExtractThumbParams( $uri ); // basic wiki URL param extracting
-	}
-
-	# Show 404 error if this is not a valid thumb request...
-	if ( !is_array( $params ) ) {
-		header( 'X-Debug: no regex match' ); // useful for debugging
-		if ( isset( $thgThumbCallbacks['error404'] )
-			&& is_callable( $thgThumbCallbacks['error404'] ) ) // overridden by configuration?
-		{
-			call_user_func( $thgThumbCallbacks['error404'] );
-		} else {
-			wfDisplay404Error(); // standard 404 message
-		}
-		return;
-	}
-
-	# Obtain and stream the thumbnail or setup for wfThumbMain() call...
-	if ( $thgThumbCurlConfig['enabled'] ) {
-		wfStreamThumbViaCurl( $params, $uri );
-		return true; // done
-	} else {
-		$_REQUEST = $params; // pass params to thumb.php
-		return 'wfThumbMain';
-	}
-}
-
 /**
- * Extract the required params for thumb.php from the thumbnail request URI.
- * At least 'width' and 'f' should be set if the result is an array.
+ * PHP script to be used as 404 handler to create and stream out a
+ * not yet existing image thumbnail.
  *
- * @param $uri String Thumbnail request URI
- * @return Array|null associative params array or null
- */
-function wfExtractThumbParams( $uri ) {
-	global $thgThumbUrlMatch;
-
-	$thumbRegex = '!^(?:' . preg_quote( $thgThumbUrlMatch['server'] ) . ')?/' .
-		preg_quote( $thgThumbUrlMatch['dirFragment'] ) . '(/archive|/temp|)/' .
-		$thgThumbUrlMatch['hashFragment'] . '([^/]*)/(page(\d*)-)*(\d*)px-[^/]*$!';
-
-	if ( preg_match( $thumbRegex, $uri, $matches ) ) {
-		list( $all, $archOrTemp, $filename, $pagefull, $pagenum, $size ) = $matches;
-		$params = array( 'f' => $filename, 'width' => $size );
-		if ( $pagenum ) {
-			$params['page'] = $pagenum;
-		}
-		if ( $archOrTemp == '/archive' ) {
-			$params['archived'] = 1;
-		} elseif ( $archOrTemp == '/temp' ) {
-			$params['temp'] = 1;
-		}
-	} else {
-		$params = null; // not a valid thumbnail URL
-	}
-
-	return $params;
-}
-
-/**
- * cURL to thumb.php and stream back the resulting file or give an error message.
+ * 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.
  *
- * @param $params Array Parameters to thumb.php
- * @param $uri String Thumbnail request URI
- * @return void
- */
-function wfStreamThumbViaCurl( array $params, $uri ) {
-	global $thgThumbCallbacks, $thgThumbCurlConfig;
-
-	# Check any backend caches for the thumbnail...
-	if ( isset( $thgThumbCallbacks['checkCache'] )
-		&& is_callable( $thgThumbCallbacks['checkCache'] ) )
-	{
-		if ( call_user_func_array( $thgThumbCallbacks['checkCache'], array( $uri, $params ) ) ) {
-			return; // file streamed from backend thumb cache
-		}
-	}
-
-	if ( !extension_loaded( 'curl' ) ) {
-		die( "cURL is not enabled for PHP on this wiki.\n" ); // sanity
-	}
-
-	# Build up the request URL to use with CURL...
-	$reqURL = $thgThumbCurlConfig['url'] . '?';
-	$first = true;
-	foreach ( $params as $name => $value ) {
-		if ( $first ) {
-			$first = false;
-		} else {
-			$reqURL .= '&';
-		}
-		$reqURL .= "$name=$value"; // Note: value is already urlencoded
-	}
-
-	# Set relevant HTTP headers...
-	$headers = array();
-	$headers[] = "X-Original-URI: " . str_replace( "\n", '', $uri );
-	if ( isset( $thgThumbCallbacks['curlHeaders'] )
-		&& is_callable( $thgThumbCallbacks['curlHeaders'] ) )
-	{
-		# Add on any custom headers (like XFF)
-		call_user_func_array( $thgThumbCallbacks['curlHeaders'], array( &$headers ) );
-	}
-
-	# Pass through some other headers...
-	$passThrough = array( 'If-Modified-Since', 'Referer', 'User-Agent' );
-	foreach ( $passThrough as $headerName ) {
-		$serverVarName = 'HTTP_' . str_replace( '-', '_', strtoupper( $headerName ) );
-		if ( !empty( $_SERVER[$serverVarName] ) ) {
-			$headers[] = $headerName . ': ' . 
-				str_replace( "\n", '', $_SERVER[$serverVarName] );
-		}
-	}
-
-	$ch = curl_init( $reqURL );
-	if ( $thgThumbCurlConfig['proxy'] ) {
-		curl_setopt( $ch, CURLOPT_PROXY, $thgThumbCurlConfig['proxy'] );
-	}
-
-	curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
-	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
-	curl_setopt( $ch, CURLOPT_TIMEOUT, $thgThumbCurlConfig['timeout'] );
-
-	# Actually make the request
-	$text = curl_exec( $ch );
-
-	# Send it on to the client...
-	$errno = curl_errno( $ch );
-	$contentType = curl_getinfo( $ch, CURLINFO_CONTENT_TYPE );
-	$httpCode = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
-	if ( $errno ) {
-		header( 'HTTP/1.1 500 Internal server error' );
-		header( 'Cache-Control: no-cache' );
-		$contentType = 'text/html';
-		$text = wfCurlErrorText( $ch );
-	} elseif ( $httpCode == 304 ) { // OK
-		header( 'HTTP/1.1 304 Not modified' );
-		$contentType = '';
-		$text = '';
-	} elseif ( strval( $text ) == '' ) {
-		header( 'HTTP/1.1 500 Internal server error' );
-		header( 'Cache-Control: no-cache' );
-		$contentType = 'text/html';
-		$text = wfCurlEmptyText( $ch );
-	} elseif ( $httpCode == 404 ) {
-		header( 'HTTP/1.1 404 Not found' );
-		header( 'Cache-Control: s-maxage=300, must-revalidate, max-age=0' );
-	} elseif ( $httpCode != 200 || substr( $contentType, 0, 9 ) == 'text/html' ) {
-		# Error message, suppress cache
-		header( 'HTTP/1.1 500 Internal server error' );
-		header( 'Cache-Control: no-cache' );
-	} else {
-		# OK thumbnail; save to any backend caches...
-		if ( isset( $thgThumbCallbacks['fillCache'] )
-			&& is_callable( $thgThumbCallbacks['fillCache'] ) )
-		{
-			call_user_func_array( $thgThumbCallbacks['fillCache'], array( $uri, $text ) );
-		}
-	}
-
-	if ( !$contentType ) {
-		header( 'Content-Type:' );
-	} else {
-		header( "Content-Type: $contentType" );
-	}
-
-	print $text; // thumb data or error text
-
-	curl_close( $ch );
-}
-
-/**
- * Get error message HTML for when the cURL response is an error.
+ * 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.
  *
- * @param $ch cURL handle
- * @return string
- */
-function wfCurlErrorText( $ch ) {
-	$error = htmlspecialchars( curl_error( $ch ) );
-	return <<<EOT
-<html>
-<head><title>Thumbnail error</title></head>
-<body>Error retrieving thumbnail from scaling server: $error</body>
-</html>
-EOT;
-}
-
-/**
- * Get error message HTML for when the cURL response is empty.
- *
- * @param $ch cURL handle
- * @return string
- */
-function wfCurlEmptyText( $ch ) {
-	return <<<EOT
-<html>
-<head><title>Thumbnail error</title></head>
-<body>Error retrieving thumbnail from scaling server: empty response</body>
-</html>
-EOT;
-}
-
-/**
- * Print out a generic 404 error message.
+ * 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
  *
- * @return void
+ * @file
+ * @ingroup Media
  */
-function wfDisplay404Error() {
-	header( 'HTTP/1.1 404 Not Found' );
-	header( 'Content-Type: text/html;charset=utf-8' );
-
-	$prot = isset( $_SERVER['HTTPS'] ) ? "https://" : "http://";
-	$serv = strlen( $_SERVER['HTTP_HOST'] ) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'];
-	$loc = $_SERVER["REQUEST_URI"];
 
-	$encUrl = htmlspecialchars( $prot . $serv . $loc );
-
-	// Looks like a typical apache2 error
-	$standard_404 = <<<ENDTEXT
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>404 Not Found</title>
-</head><body>
-<h1>Not Found</h1>
-<p>The requested URL $encUrl was not found on this server.</p>
-</body></html>
-ENDTEXT;
+define( 'THUMB_HANDLER', true );
 
-	print $standard_404;
-}
+// Execute thumb.php, having set THUMB_HANDLER so that
+// it knows to extract params from a thumbnail file URL.
+require __DIR__ . '/thumb.php';