--- /dev/null
+<?php
+
+# Valid web server entry point
+define( 'THUMB_HANDLER', true );
+
+# Load thumb-handler configuration. We don't want to use
+# WebStart.php or the like as it would kill performance.
+$configPath = dirname( __FILE__ ) . "/thumb.config.php";
+if ( !file_exists( $configPath ) ) {
+ die( "Thumb-handler.php is not enabled for this wiki.\n" );
+}
+require( $configPath );
+
+function wfHandleThumb404() {
+ global $thgThumb404File;
+
+ # 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 ( function_exists( 'wfCustomExtractThumbParams' ) ) {
+ $params = wfCustomExtractThumbParams( $uri ); // overridden by configuration
+ } else {
+ $params = wfExtractThumbParams( $uri ); // basic wiki URL param extracting
+ }
+ if ( $params === null ) { // not a valid thumb request
+ header( 'X-Debug: no regex match' ); // useful for debugging
+ require_once( $thgThumb404File ); // standard 404 message
+ return;
+ }
+
+ # Do some basic checks on the filename...
+ if ( preg_match( '/[\x80-\xff]/', $uri ) ) {
+ header( 'HTTP/1.0 400 Bad request' );
+ header( 'Content-Type: text/html' );
+ echo "<html><head><title>Bad request</title></head><body>" .
+ "The URI contained bytes with the high bit set, this is not allowed." .
+ "</body></html>";
+ return;
+ } elseif ( strpos( $params['f'], '%20' ) !== false ) {
+ header( 'HTTP/1.0 404 Not found' );
+ header( 'Content-Type: text/html' );
+ header( 'X-Debug: filename contains a space' ); // useful for debugging
+ echo "<html><head><title>Not found</title></head><body>" .
+ "The URL contained spaces, we don't have any thumbnail files with spaces." .
+ "</body></html>";
+ return;
+ }
+
+ wfStreamThumbViaCurl( $params, $uri );
+}
+
+/**
+ * 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.
+ *
+ * @param $uri String Thumbnail request URI
+ * @return Array|null associative params array or null
+ */
+function wfExtractThumbParams( $uri ) {
+ global $thgThumbServer, $thgThumbFragment, $thgThumbHashFragment;
+
+ $thumbRegex = '!^(?:' . preg_quote( $thgThumbServer ) . ')?/' .
+ preg_quote( $thgThumbFragment ) . '(/archive|/temp|)/' .
+ $thgThumbHashFragment . '([^/]*)/' . '(page(\d*)-)*(\d*)px-([^/]*)$!';
+
+ # Is this a thumbnail?
+ if ( preg_match( $thumbRegex, $uri, $matches ) ) {
+ list( $all, $archOrTemp, $filename, $pagefull, $pagenum, $size, $fn2 ) = $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;
+ }
+
+ return $params;
+}
+
+/**
+ * cURL to thumb.php and stream back the resulting file or give an error message.
+ *
+ * @param $params Array Parameters to thumb.php
+ * @param $uri String Thumbnail request URI
+ * @return void
+ */
+function wfStreamThumbViaCurl( array $params, $uri ) {
+ global $thgThumbScriptPath, $thgThumbCurlProxy, $thgThumbCurlTimeout;
+
+ if ( !function_exists( 'curl_init' ) ) {
+ header( 'HTTP/1.0 404 Not found' );
+ header( 'Content-Type: text/html' );
+ header( 'X-Debug: cURL is not enabled' ); // useful for debugging
+ echo "<html><head><title>Not found</title></head><body>" .
+ "cURL is not enabled for PHP on this wiki. Unable to send request thumb.php." .
+ "</body></html>";
+ return;
+ }
+
+ # Build up the request URL to use with CURL...
+ $reqURL = "{$thgThumbScriptPath}?";
+ $first = true;
+ foreach ( $params as $name => $value ) {
+ if ( $first ) {
+ $first = false;
+ } else {
+ $reqURL .= '&';
+ }
+ // Note: value is already urlencoded
+ $reqURL .= "$name=$value";
+ }
+
+ $ch = curl_init( $reqURL );
+ if ( $thgThumbCurlProxy ) {
+ curl_setopt( $ch, CURLOPT_PROXY, $thgThumbCurlProxy );
+ }
+
+ $headers = array(); // HTTP headers
+ # Set certain headers...
+ $headers[] = "X-Original-URI: " . str_replace( "\n", '', $uri );
+ if ( function_exists( 'wfCustomThumbRequestHeaders' ) ) {
+ wfCustomThumbRequestHeaders( $headers ); // add on any custom headers (like XFF)
+ }
+ # 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] );
+ }
+ }
+
+ curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers );
+ curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
+ curl_setopt( $ch, CURLOPT_TIMEOUT, $thgThumbCurlTimeout );
+
+ # 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' );
+ list( $text, $contentType ) = wfCurlErrorText( $ch );
+ } elseif ( $httpCode == 304 ) {
+ 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' );
+ list( $text, $contentType ) = 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'
+ || substr( $text, 0, 5 ) == '<html' )
+ {
+ # Error message, suppress cache
+ header( 'HTTP/1.1 500 Internal server error' );
+ header( 'Cache-Control: no-cache' );
+ }
+
+ if ( !$contentType ) {
+ header( 'Content-Type:' );
+ } else {
+ header( "Content-Type: $contentType" );
+ }
+
+ print $text; // thumb data or error text
+
+ curl_close( $ch );
+}
+
+/**
+ * Get error message and content type for when the cURL response is empty.
+ *
+ * @param $ch cURL handle
+ * @return Array (error html, content type)
+ */
+function wfCurlErrorText( $ch ) {
+ $contentType = 'text/html';
+ $error = htmlspecialchars( curl_error( $ch ) );
+ $text = <<<EOT
+<html>
+<head><title>Thumbnail error</title></head>
+<body>Error retrieving thumbnail from scaling server: $error</body>
+</html>
+EOT;
+ return array( $text, $contentType );
+}
+
+/**
+ * Get error message and content type for when the cURL response is an error.
+ *
+ * @param $ch cURL handle
+ * @return Array (error html, content type)
+ */
+function wfCurlEmptyText( $ch ) {
+ $contentType = 'text/html';
+ $error = htmlspecialchars( curl_error( $ch ) );
+ $text = <<<EOT
+<html>
+<head><title>Thumbnail error</title></head>
+<body>Error retrieving thumbnail from scaling server: empty response</body>
+</html>
+EOT;
+ return array( $text, $contentType );
+}
+
+# Entry point
+wfHandleThumb404();
dépôts / lhc / web / wiklou.git / commitdiff