Add helper for HTTPFileStreamer header syntax

[lhc/web/wiklou.git] / includes / libs / filebackend / HTTPFileStreamer.php

diff --git a/includes/libs/filebackend/HTTPFileStreamer.php b/includes/libs/filebackend/HTTPFileStreamer.php
index e161254..7a11aeb 100644 (file)
--- a/includes/libs/filebackend/HTTPFileStreamer.php
+++ b/includes/libs/filebackend/HTTPFileStreamer.php
@@ -39,6 +39,27 @@ class HTTPFileStreamer {
        // Do not try to tear down any PHP output buffers
        const STREAM_ALLOW_OB = 2;
 
+       /**
+        * Takes HTTP headers in a name => value format and converts them to the weird format
+        * expected by stream().
+        * @param string[] $headers
+        * @return array[] [ $headers, $optHeaders ]
+        * @since 1.34
+        */
+       public static function preprocessHeaders( $headers ) {
+               $rawHeaders = [];
+               $optHeaders = [];
+               foreach ( $headers as $name => $header ) {
+                       $nameLower = strtolower( $name );
+                       if ( in_array( $nameLower, [ 'range', 'if-modified-since' ], true ) ) {
+                               $optHeaders[$nameLower] = $header;
+                       } else {
+                               $rawHeaders[] = "$name: $header";
+                       }
+               }
+               return [ $rawHeaders, $optHeaders ];
+       }
+
        /**
         * @param string $path Local filesystem path to a file
         * @param array $params Options map, which includes: