-- Prosody IM

-- Copyright (C) 2009 Tobias Markmann

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

local st = require "util.stanza";

local print = print

local xmlns_compression_feature = "http://jabber.org/features/compress"

local xmlns_compression_protocol = "http://jabber.org/protocol/compress"

local compression_stream_feature = st.stanza("compression", {xmlns=xmlns_compression_feature}):tag("method"):text("zlib"):up();

module:add_event_hook("stream-features",

		function (session, features)

		end

);

module:add_handler("c2s_unauthed", "compress", xmlns_compression_protocol,

		function(session, stanza)

			-- checking if the compression method is supported

			local method = stanza:child_with_name("method")[1];

			if method == "zlib" then

				session.log("info", method.." compression selected.");

				session.send(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));

			else

				session.log("info", method.." compression selected. But we don't support it.");

				local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");

				session.send(error_st);

			end

		end

);