--- a/net/httpserver.lua	Wed Jan 05 06:23:58 2011 +0500
+++ b/net/httpserver.lua	Wed Jan 05 06:26:49 2011 +0500
@@ -20,7 +20,7 @@
 local s_match, s_gmatch = string.match, string.gmatch;
 local tonumber, tostring, pairs, ipairs, type = tonumber, tostring, pairs, ipairs, type;
 
-local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
+local urlencode = function (s) return s and (s:gsub("%W", function (c) return ("%%%02x"):format(c:byte()); end)); end
 
 local log = require "util.logger".init("httpserver");