Rewrite Location response header, so clients will use the proxy for redirects.

Author: Tai Lee

proxy.php

@@ -106,9 +106,16 @@
 
 // (re-)send the headers
 $response_headers = preg_split( '/(\r\n){1}/', $response_headers );
-foreach ( $response_headers as $key => $response_header )
-	if ( !preg_match( '/^(Transfer-Encoding):/', $response_header ) )
+foreach ( $response_headers as $key => $response_header ) {
+	// Rewrite the `Location` header, so clients will also use the proxy for redirects.
+	if ( preg_match( '/^Location:/', $response_header ) ) {
+		list($header, $value) = preg_split( '/: /', $response_header, 2 );
+		$response_header = 'Location: ' . $_SERVER['REQUEST_URI'] . '?csurl=' . $value;
+	}
+	if ( !preg_match( '/^(Transfer-Encoding):/', $response_header ) ) {
 		header( $response_header );
+	}
+}
 
 // finally, output the content
 print($response_content );