diff --git a/APIs/extra_mime.lua b/APIs/extra_mime.lua
index b30b505..9b4a4ee 100644
--- a/APIs/extra_mime.lua
+++ b/APIs/extra_mime.lua
@@ -60,12 +60,20 @@ function std.sendFile(m)
 		std.header("Content-Transfer-Encoding", "binary")
 		std.header("Cache-Control", "no-cache, no-store")
 		std.header("Connection", "Keep-Alive")
-		std.header("Etag", "a404b-c3f-47c3a14937c80")
+		std.header_flush()
+		std.f(m)
 	else
-		std.status(200)
-		std.header("Content-Type", mime)
-		std.header("Content-Length", len)
+		if HEADER['If-Modified-Since'] and HEADER['If-Modified-Since'] == finfo.ctime then
+			std.status(304)
+			std.header_flush()
+		else
+			std.status(200)
+			std.header("Content-Type", mime)
+			--std.header("Content-Length", len)
+			std.header("Cache-Control", "no-cache")
+			std.header("Last-Modified", finfo.ctime)
+			std.header_flush()
+			std.f(m)
+		end
 	end
-	std.header_flush()
-	std.f(m)
 end
diff --git a/dist/lua-0.5.2b.tar.gz b/dist/lua-0.5.2b.tar.gz
index fbd10ab..dacff87 100644
Binary files a/dist/lua-0.5.2b.tar.gz and b/dist/lua-0.5.2b.tar.gz differ
diff --git a/lib/asl/ulib.c b/lib/asl/ulib.c
index dbff3be..8a20000 100644
--- a/lib/asl/ulib.c
+++ b/lib/asl/ulib.c
@@ -255,13 +255,13 @@ static int l_file_stat(lua_State* L, const char* path)
 		
 		//ctime
 		lua_pushstring(L,"ctime");
-		strftime(date, sizeof(date), "%Y-%m-%dT%H:%M:%S", localtime(&(st.st_ctime)));
+		timestr(st.st_ctime,date,sizeof(date),"%a, %d %b %Y %H:%M:%S GMT",1);
 		lua_pushstring(L,date);
 		lua_settable(L,-3);
 		//mtime
 		
 		lua_pushstring(L,"mtime");
-		strftime(date, sizeof(date), "%Y-%m-%dT%H:%M:%S", localtime(&(st.st_mtime)));
+		timestr(st.st_mtime,date,sizeof(date),"%a, %d %b %Y %H:%M:%S GMT",1);
 		lua_pushstring(L,date);
 		lua_settable(L,-3);