-- Prosody IM
-- Copyright (C) 2009-2012 Tobias Markmann
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
module:hook("stream-features", function(event)
local origin, features = event.origin, event.features;
- if not origin.compressed and (origin.type == "c2s" or origin.type == "s2sin" or origin.type == "s2sout") then
+ if not origin.compressed and origin.type == "c2s" then
-- FIXME only advertise compression support when TLS layer has no compression enabled
features:add_child(compression_stream_feature);
end
module:hook("s2s-stream-features", function(event)
local origin, features = event.origin, event.features;
-- FIXME only advertise compression support when TLS layer has no compression enabled
- if not origin.compressed and (origin.type == "c2s" or origin.type == "s2sin" or origin.type == "s2sout") then
+ if not origin.compressed and origin.type == "s2sin" then
features:add_child(compression_stream_feature);
end
end);
-- Hook to activate compression if remote server supports it.
module:hook_stanza(xmlns_stream, "features",
function (session, stanza)
- if not session.compressed and (session.type == "c2s" or session.type == "s2sin" or session.type == "s2sout") then
+ if not session.compressed and session.type == "s2sout" then
-- does remote server support compression?
- local comp_st = stanza:child_with_name("compression");
+ local comp_st = stanza:get_child("compression", xmlns_compression_feature);
if comp_st then
-- do we support the mechanism
- for a in comp_st:children() do
- local algorithm = a[1]
+ for a in comp_st:childtags("method") do
+ local algorithm = a:get_text();
if algorithm == "zlib" then
session.sends2s(st.stanza("compress", {xmlns=xmlns_compression_protocol}):tag("method"):text("zlib"))
session.log("debug", "Enabled compression using zlib.")
return;
end
return compressed;
- end);
+ end);
end
-- setup decompression for a stream
module:hook("stanza/http://jabber.org/protocol/compress:compressed", function(event)
local session = event.origin;
- if session.type == "s2sout_unauthed" or session.type == "s2sout" then
+ if session.type == "s2sout" then
session.log("debug", "Activating compression...")
-- create deflate and inflate streams
local deflate_stream = get_deflate_stream(session);
if not deflate_stream then return true; end
-
+
local inflate_stream = get_inflate_stream(session);
if not inflate_stream then return true; end
-
+
-- setup compression for session.w
setup_compression(session, deflate_stream);
-
+
-- setup decompression for session.data
setup_decompression(session, inflate_stream);
session:reset_stream();
- local default_stream_attr = {xmlns = "jabber:server", ["xmlns:stream"] = "http://etherx.jabber.org/streams",
- ["xmlns:db"] = 'jabber:server:dialback', version = "1.0", to = session.to_host, from = session.from_host};
- session.sends2s("<?xml version='1.0'?>");
- session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
+ session:open_stream(session.from_host, session.to_host);
session.compressed = true;
return true;
end
module:hook("stanza/http://jabber.org/protocol/compress:compress", function(event)
local session, stanza = event.origin, event.stanza;
- if session.type == "c2s" or session.type == "s2sin" or session.type == "c2s_unauthed" or session.type == "s2sin_unauthed" then
+ if session.type == "c2s" or session.type == "s2sin" then
-- fail if we are already compressed
if session.compressed then
local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
session.log("debug", "Client tried to establish another compression layer.");
return true;
end
-
+
-- checking if the compression method is supported
- local method = stanza:child_with_name("method");
- method = method and (method[1] or "");
+ local method = stanza:get_child_text("method");
if method == "zlib" then
session.log("debug", "zlib compression enabled.");
-
+
-- create deflate and inflate streams
local deflate_stream = get_deflate_stream(session);
if not deflate_stream then return true; end
-
+
local inflate_stream = get_inflate_stream(session);
if not inflate_stream then return true; end
-
+
(session.sends2s or session.send)(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));
session:reset_stream();
-
+
-- setup compression for session.w
setup_compression(session, deflate_stream);
-
+
-- setup decompression for session.data
setup_decompression(session, inflate_stream);
-
+
session.compressed = true;
elseif method then
session.log("debug", "%s compression selected, but we don't support it.", tostring(method));