annotate mod_compression_unsafe/mod_compression_unsafe.lua @ 2994:9842979f3034

mod_query_client_ver: Add a README
author Kim Alvefur <zash@zash.se>
date Wed, 04 Apr 2018 16:43:35 +0200
parents 226693a22fc9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2482
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 -- Prosody IM
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
2 -- Copyright (C) 2009-2012 Tobias Markmann
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
3 --
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
4 -- This project is MIT/X11 licensed. Please see the
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
5 -- COPYING file in the source package for more information.
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
6 --
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
7
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
8 local st = require "util.stanza";
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
9 local zlib = require "zlib";
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
10 local pcall = pcall;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
11 local tostring = tostring;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
12
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
13 local xmlns_compression_feature = "http://jabber.org/features/compress"
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
14 local xmlns_compression_protocol = "http://jabber.org/protocol/compress"
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
15 local xmlns_stream = "http://etherx.jabber.org/streams";
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
16 local compression_stream_feature = st.stanza("compression", {xmlns=xmlns_compression_feature}):tag("method"):text("zlib"):up();
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
17 local add_filter = require "util.filters".add_filter;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
18
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
19 local compression_level = module:get_option_number("compression_level", 7);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
20
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
21 if not compression_level or compression_level < 1 or compression_level > 9 then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
22 module:log("warn", "Invalid compression level in config: %s", tostring(compression_level));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
23 module:log("warn", "Module loading aborted. Compression won't be available.");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
24 return;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
25 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
26
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
27 module:hook("stream-features", function(event)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
28 local origin, features = event.origin, event.features;
2795
226693a22fc9 mod_compression_unsafe: Fix logic bug in previous commit
Matthew Wild <mwild1@gmail.com>
parents: 2794
diff changeset
29 if not origin.compressed and (origin.type == "c2s" or origin.type == "c2s_unbound") then
2482
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
30 features:add_child(compression_stream_feature);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
31 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
32 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
33
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
34 module:hook("s2s-stream-features", function(event)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
35 local origin, features = event.origin, event.features;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
36 if not origin.compressed and origin.type == "s2sin" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
37 features:add_child(compression_stream_feature);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
38 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
39 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
40
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
41 -- Hook to activate compression if remote server supports it.
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
42 module:hook_stanza(xmlns_stream, "features",
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
43 function (session, stanza)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
44 if not session.compressed and session.type == "s2sout" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
45 -- does remote server support compression?
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
46 local comp_st = stanza:get_child("compression", xmlns_compression_feature);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
47 if comp_st then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
48 -- do we support the mechanism
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
49 for a in comp_st:childtags("method") do
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
50 local algorithm = a:get_text();
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
51 if algorithm == "zlib" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
52 session.sends2s(st.stanza("compress", {xmlns=xmlns_compression_protocol}):tag("method"):text("zlib"))
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
53 session.log("debug", "Enabled compression using zlib.")
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
54 return true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
55 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
56 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
57 session.log("debug", "Remote server supports no compression algorithm we support.")
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
58 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
59 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
60 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
61 , 250);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
62
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
63
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
64 -- returns either nil or a fully functional ready to use inflate stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
65 local function get_deflate_stream(session)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
66 local status, deflate_stream = pcall(zlib.deflate, compression_level);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
67 if status == false then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
68 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
69 (session.sends2s or session.send)(error_st);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
70 session.log("error", "Failed to create zlib.deflate filter.");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
71 module:log("error", "%s", tostring(deflate_stream));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
72 return
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
73 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
74 return deflate_stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
75 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
76
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
77 -- returns either nil or a fully functional ready to use inflate stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
78 local function get_inflate_stream(session)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
79 local status, inflate_stream = pcall(zlib.inflate);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
80 if status == false then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
81 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
82 (session.sends2s or session.send)(error_st);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
83 session.log("error", "Failed to create zlib.inflate filter.");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
84 module:log("error", "%s", tostring(inflate_stream));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
85 return
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
86 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
87 return inflate_stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
88 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
89
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
90 -- setup compression for a stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
91 local function setup_compression(session, deflate_stream)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
92 add_filter(session, "bytes/out", function(t)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
93 local status, compressed, eof = pcall(deflate_stream, tostring(t), 'sync');
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
94 if status == false then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
95 module:log("warn", "%s", tostring(compressed));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
96 session:close({
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
97 condition = "undefined-condition";
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
98 text = compressed;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
99 extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
100 });
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
101 return;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
102 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
103 return compressed;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
104 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
105 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
106
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
107 -- setup decompression for a stream
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
108 local function setup_decompression(session, inflate_stream)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
109 add_filter(session, "bytes/in", function(data)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
110 local status, decompressed, eof = pcall(inflate_stream, data);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
111 if status == false then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
112 module:log("warn", "%s", tostring(decompressed));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
113 session:close({
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
114 condition = "undefined-condition";
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
115 text = decompressed;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
116 extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
117 });
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
118 return;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
119 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
120 return decompressed;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
121 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
122 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
123
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
124 module:hook("stanza/http://jabber.org/protocol/compress:compressed", function(event)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
125 local session = event.origin;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
126
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 if session.type == "s2sout" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 session.log("debug", "Activating compression...")
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
129 -- create deflate and inflate streams
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
130 local deflate_stream = get_deflate_stream(session);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
131 if not deflate_stream then return true; end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
132
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
133 local inflate_stream = get_inflate_stream(session);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
134 if not inflate_stream then return true; end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
135
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 -- setup compression for session.w
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 setup_compression(session, deflate_stream);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
138
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
139 -- setup decompression for session.data
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 setup_decompression(session, inflate_stream);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141 session:reset_stream();
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
142 session:open_stream(session.from_host, session.to_host);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
143 session.compressed = true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
144 return true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
145 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
146 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
147
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
148 module:hook("stanza/http://jabber.org/protocol/compress:failure", function(event)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
149 local err = event.stanza:get_child();
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
150 (event.origin.log or module._log)("warn", "Compression setup failed (%s)", err and err.name or "unknown reason");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151 return true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
152 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
153
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
154 module:hook("stanza/http://jabber.org/protocol/compress:compress", function(event)
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
155 local session, stanza = event.origin, event.stanza;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
156
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
157 if session.type == "c2s" or session.type == "s2sin" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
158 -- fail if we are already compressed
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
159 if session.compressed then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
160 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
161 (session.sends2s or session.send)(error_st);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
162 session.log("debug", "Client tried to establish another compression layer.");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
163 return true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
165
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
166 -- checking if the compression method is supported
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
167 local method = stanza:get_child_text("method");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
168 if method == "zlib" then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
169 session.log("debug", "zlib compression enabled.");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
170
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
171 -- create deflate and inflate streams
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
172 local deflate_stream = get_deflate_stream(session);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
173 if not deflate_stream then return true; end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
174
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
175 local inflate_stream = get_inflate_stream(session);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 if not inflate_stream then return true; end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
177
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
178 (session.sends2s or session.send)(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
179 session:reset_stream();
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
180
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
181 -- setup compression for session.w
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
182 setup_compression(session, deflate_stream);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
183
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 -- setup decompression for session.data
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 setup_decompression(session, inflate_stream);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
186
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
187 session.compressed = true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
188 elseif method then
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
189 session.log("debug", "%s compression selected, but we don't support it.", tostring(method));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 (session.sends2s or session.send)(error_st);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
192 else
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
193 (session.sends2s or session.send)(st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed"));
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
194 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
195 return true;
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
196 end
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
197 end);
c96a53b0b820 mod_compression: Import from Prosody, revision 0c69305ab525
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198