# HG changeset patch
# User Tobias Markmann <tm@ayena.de>
# Date 1250100305 -7200
# Node ID b8eec163a8230f583bb1b7bab35c4b0713db60bb
# Parent  a276d379e00a7ef0a8707e35d382f085f0897933
Commit initial version of mod_compression.

diff -r a276d379e00a -r b8eec163a823 plugins/mod_compression.lua
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/mod_compression.lua	Wed Aug 12 20:05:05 2009 +0200
@@ -0,0 +1,35 @@
+-- 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)
+			features:add_child(compression_stream_feature);
+		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
+);