Ticket #9395: 9395.patch

wp-includes/http.php

@@ -396 +396 @@
          *                                      Then a numbered array is returned as the value of that header-key.
          */
         function processHeaders($headers) {
-                if ( is_string($headers) )
-                        $headers = explode("\n", str_replace(array("\r\n", "\r"), "\n", $headers) );
+                // split headers, one per array element
+                if ( is_string($headers) ) {
+                        // tolerate line terminator: CRLF = LF (RFC 2616 19.3)
+                        $headers = str_replace("\r\n", "\n");
+                        // unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
+                        $headers = preg_replace('\n[ \t]', ' ', $headers);
+                        // create the headers array
+                        $headers = explode("\n", $headers);
+                }
 
                 $response = array('code' => 0, 'message' => '');