prosody
79eb903d0e67
plugins/mod_compression.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

plugins/mod_compression.lua @ 1678:79eb903d0e67

Using pcall to make save the rest from zlib fails. Emit errors on those fails.
author Tobias Markmann <tm@ayena.de>
date Thu, 13 Aug 2009 13:20:32 +0200
parent 1677:f0961ce9830c
child 1679:e2eb0eaf2544
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
1 -- Prosody IM
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
2 -- Copyright (C) 2009 Tobias Markmann
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
3 --
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
4 -- This project is MIT/X11 licensed. Please see the
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
5 -- COPYING file in the source package for more information.
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
6 --
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
7
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
8 local st = require "util.stanza";
1671
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
9 local zlib = require "zlib";
1678
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
10 local print = print;
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
11 local pcall = pcall;
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
12
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
13 local xmlns_compression_feature = "http://jabber.org/features/compress"
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
14 local xmlns_compression_protocol = "http://jabber.org/protocol/compress"
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
15 local compression_stream_feature = st.stanza("compression", {xmlns=xmlns_compression_feature}):tag("method"):text("zlib"):up();
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
16
1676
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
17 local compression_level = module:get_option("compression_level");
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
18
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
19 -- if not defined assume admin wants best compression
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
20 if compression_level == nil then compression_level = 9 end;
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
21
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
22 compression_level = tonumber(compression_level);
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
23 if not compression_level or compression_level < 1 or compression_level > 9 then
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
24 module:log("warn", "Invalid compression level in config: %s", tostring(compression_level));
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
25 module:log("warn", "Module loading aborted. Compression won't be available.");
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
26 return;
719350956714 Add config option handling.
Tobias Markmann <tm@ayena.de>
parents: 1674
diff changeset
27 end
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
28
1670
23bb280c5eac Remove unwanted spaces.
Tobias Markmann <tm@ayena.de>
parents: 1669
diff changeset
29 module:add_event_hook("stream-features",
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
30 function (session, features)
1673
5f81cd6d4a92 Remove space at the end of a line.
Tobias Markmann <tm@ayena.de>
parents: 1672
diff changeset
31 if not session.compressed then
1674
250bddde4162 Add a TODO for s2s compression support.
Tobias Markmann <tm@ayena.de>
parents: 1673
diff changeset
32 -- FIXME only advertise compression support when TLS layer has no compression enabled
1672
614623f393c6 Add FIXME to remember TLS compression detection.
Tobias Markmann <tm@ayena.de>
parents: 1671
diff changeset
33 features:add_child(compression_stream_feature);
614623f393c6 Add FIXME to remember TLS compression detection.
Tobias Markmann <tm@ayena.de>
parents: 1671
diff changeset
34 end
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
35 end
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
36 );
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
37
1674
250bddde4162 Add a TODO for s2s compression support.
Tobias Markmann <tm@ayena.de>
parents: 1673
diff changeset
38 -- TODO Support compression on S2S level too.
1670
23bb280c5eac Remove unwanted spaces.
Tobias Markmann <tm@ayena.de>
parents: 1669
diff changeset
39 module:add_handler("c2s_unauthed", "compress", xmlns_compression_protocol,
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
40 function(session, stanza)
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
41 -- checking if the compression method is supported
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
42 local method = stanza:child_with_name("method")[1];
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
43 if method == "zlib" then
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
44 session.log("info", method.." compression selected.");
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
45 session.send(st.stanza("compressed", {xmlns=xmlns_compression_protocol}));
1671
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
46 session:reset_stream();
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
47
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
48 -- create deflate and inflate streams
1678
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
49 local status, deflate_stream = pcall(zlib.deflate, compression_level);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
50 if status == false then
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
51 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
52 session.send(error_st);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
53 session:log("error", "Failed to create zlib.deflate filter.");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
54 module:log("error", inflate_stream);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
55 return
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
56 end
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
57
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
58 local status, inflate_stream = pcall(zlib.inflate);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
59 if status == false then
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
60 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
61 session.send(error_st);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
62 session:log("error", "Failed to create zlib.deflate filter.");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
63 module:log("error", inflate_stream);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
64 return
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
65 end
1671
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
66
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
67 -- setup compression for session.w
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
68 local old_send = session.send;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
69
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
70 session.send = function(t)
1678
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
71 local status, compressed, eof = pcall(deflate_stream, tostring(t), 'sync');
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
72 if status == false then
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
73 session:close({
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
74 condition = "undefined-condition";
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
75 text = compressed;
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
76 extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
77 });
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
78 module:log("error", compressed);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
79 return;
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
80 end
1671
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
81 old_send(compressed);
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
82 end;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
83
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
84 -- setup decompression for session.data
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
85 local function setup_decompression(session)
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
86 local old_data = session.data
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
87 session.data = function(conn, data)
1678
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
88 local status, decompressed, eof = pcall(inflate_stream, data);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
89 if status == false then
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
90 session:close({
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
91 condition = "undefined-condition";
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
92 text = compressed;
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
93 extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
94 });
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
95 module:log("error", compressed);
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
96 return;
79eb903d0e67 Using pcall to make save the rest from zlib fails. Emit errors on those fails.
Tobias Markmann <tm@ayena.de>
parents: 1677
diff changeset
97 end
1671
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
98 old_data(conn, decompressed);
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
99 end;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
100 end
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
101 setup_decompression(session);
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
102
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
103 local session_reset_stream = session.reset_stream;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
104 session.reset_stream = function(session)
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
105 session_reset_stream(session);
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
106 setup_decompression(session);
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
107 return true;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
108 end;
d196ac213104 Actually inject de- and compression into the reading/writing functions.
Tobias Markmann <tm@ayena.de>
parents: 1670
diff changeset
109 session.compressed = true;
1669
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
110 else
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
111 session.log("info", method.." compression selected. But we don't support it.");
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
112 local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
113 session.send(error_st);
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
114 end
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
115 end
b8eec163a823 Commit initial version of mod_compression.
Tobias Markmann <tm@ayena.de>
parents:
diff changeset
116 );