Ticket #34796: 34796.diff

src/wp-includes/class-wp-http-streams.php

@@ -203 +203 @@
                 if ( ! is_null($r['body']) )
                         $strHeaders .= $r['body'];
 
+                // Ensure the stream is ready to write to
+                $no_streams = array();
+                $write_streams = array( $handle );
+                if ( ! stream_select( $no_streams, $write_streams, $no_streams, 0, 50 ) ) {
+                        return new WP_Error( 'http_request_failed', __( 'Could not open outbound stream' ) );
+                }
+
                 fwrite($handle, $strHeaders);
 
                 if ( ! $r['blocking'] ) {