--- mod_websocket.lua
+++ mod_websocket.lua
@@ -163,34 +163,34 @@ function handle_request(event)
 		return 403;
 	end
 
-	local function websocket_close(code, message)
+	local function websocket_close(conn, code, message)
 		conn:write(build_close(code, message));
 		conn:close();
 	end
 
 	local dataBuffer;
-	local function handle_frame(frame)
+	local function handle_frame(conn, frame)
 		local opcode = frame.opcode;
 		local length = frame.length;
 		module:log("debug", "Websocket received frame: opcode=%0x, %i bytes", frame.opcode, #frame.data);
 
 		-- Error cases
 		if frame.RSV1 or frame.RSV2 or frame.RSV3 then -- Reserved bits non zero
-			websocket_close(1002, "Reserved bits not zero");
+			websocket_close(conn, 1002, "Reserved bits not zero");
 			return false;
 		end
 
 		if opcode == 0x8 then -- close frame
 			if length == 1 then
-				websocket_close(1002, "Close frame with payload, but too short for status code");
+				websocket_close(conn, 1002, "Close frame with payload, but too short for status code");
 				return false;
 			elseif length >= 2 then
 				local status_code = parse_close(frame.data)
 				if status_code < 1000 then
-					websocket_close(1002, "Closed with invalid status code");
+					websocket_close(conn, 1002, "Closed with invalid status code");
 					return false;
 				elseif ((status_code > 1003 and status_code < 1007) or status_code > 1011) and status_code < 3000 then
-					websocket_close(1002, "Closed with reserved status code");
+					websocket_close(conn, 1002, "Closed with reserved status code");
 					return false;
 				end
 			end
@@ -198,28 +198,28 @@ function handle_request(event)
 
 		if opcode >= 0x8 then
 			if length > 125 then -- Control frame with too much payload
-				websocket_close(1002, "Payload too large");
+				websocket_close(conn, 1002, "Payload too large");
 				return false;
 			end
 
 			if not frame.FIN then -- Fragmented control frame
-				websocket_close(1002, "Fragmented control frame");
+				websocket_close(conn, 1002, "Fragmented control frame");
 				return false;
 			end
 		end
 
 		if (opcode > 0x2 and opcode < 0x8) or (opcode > 0xA) then
-			websocket_close(1002, "Reserved opcode");
+			websocket_close(conn, 1002, "Reserved opcode");
 			return false;
 		end
 
 		if opcode == 0x0 and not dataBuffer then
-			websocket_close(1002, "Unexpected continuation frame");
+			websocket_close(conn, 1002, "Unexpected continuation frame");
 			return false;
 		end
 
 		if (opcode == 0x1 or opcode == 0x2) and dataBuffer then
-			websocket_close(1002, "Continuation frame expected");
+			websocket_close(conn, 1002, "Continuation frame expected");
 			return false;
 		end
 
@@ -229,11 +229,11 @@ function handle_request(event)
 		elseif opcode == 0x1 then -- Text frame
 			dataBuffer = {frame.data};
 		elseif opcode == 0x2 then -- Binary frame
-			websocket_close(1003, "Only text frames are supported");
+			websocket_close(conn, 1003, "Only text frames are supported");
 			return;
 		elseif opcode == 0x8 then -- Close request
-			websocket_close(1000, "Goodbye");
-			return;
+			websocket_close(conn, 1000, "Goodbye");
+			return "";
 		elseif opcode == 0x9 then -- Ping frame
 			frame.opcode = 0xA;
 			conn:write(build_frame(frame));
@@ -276,7 +276,7 @@ function handle_request(event)
 
 		while frame do
 			frameBuffer = frameBuffer:sub(length + 1);
-			local result = handle_frame(frame);
+			local result = handle_frame(session.conn, frame);
 			if not result then return; end
 			cache[#cache+1] = filter_open_close(result);
 			frame, length = parse_frame(frameBuffer);