aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--plugins/mod_compression.lua195
-rw-r--r--util/cache.lua12
-rw-r--r--util/iterators.lua33
3 files changed, 36 insertions, 204 deletions
diff --git a/plugins/mod_compression.lua b/plugins/mod_compression.lua
index d49e3880..17be2ef2 100644
--- a/plugins/mod_compression.lua
+++ b/plugins/mod_compression.lua
@@ -1,198 +1,9 @@
-- Prosody IM
--- Copyright (C) 2009-2012 Tobias Markmann
+-- Copyright (C) 2016 Matthew Wild
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-local st = require "util.stanza";
-local zlib = require "zlib";
-local pcall = pcall;
-local tostring = tostring;
-
-local xmlns_compression_feature = "http://jabber.org/features/compress"
-local xmlns_compression_protocol = "http://jabber.org/protocol/compress"
-local xmlns_stream = "http://etherx.jabber.org/streams";
-local compression_stream_feature = st.stanza("compression", {xmlns=xmlns_compression_feature}):tag("method"):text("zlib"):up();
-local add_filter = require "util.filters".add_filter;
-
-local compression_level = module:get_option_number("compression_level", 7);
-
-if not compression_level or compression_level < 1 or compression_level > 9 then
- module:log("warn", "Invalid compression level in config: %s", tostring(compression_level));
- module:log("warn", "Module loading aborted. Compression won't be available.");
- return;
-end
-
-module:hook("stream-features", function(event)
- local origin, features = event.origin, event.features;
- if not origin.compressed and origin.type == "c2s" then
- features:add_child(compression_stream_feature);
- end
-end);
-
-module:hook("s2s-stream-features", function(event)
- local origin, features = event.origin, event.features;
- 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 == "s2sout" then
- -- does remote server support 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: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 true;
- end
- end
- session.log("debug", "Remote server supports no compression algorithm we support.")
- end
- end
- end
-, 250);
-
-
--- returns either nil or a fully functional ready to use inflate stream
-local function get_deflate_stream(session)
- local status, deflate_stream = pcall(zlib.deflate, compression_level);
- if status == false then
- local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
- (session.sends2s or session.send)(error_st);
- session.log("error", "Failed to create zlib.deflate filter.");
- module:log("error", "%s", tostring(deflate_stream));
- return
- end
- return deflate_stream
-end
-
--- returns either nil or a fully functional ready to use inflate stream
-local function get_inflate_stream(session)
- local status, inflate_stream = pcall(zlib.inflate);
- if status == false then
- local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed");
- (session.sends2s or session.send)(error_st);
- session.log("error", "Failed to create zlib.inflate filter.");
- module:log("error", "%s", tostring(inflate_stream));
- return
- end
- return inflate_stream
-end
-
--- setup compression for a stream
-local function setup_compression(session, deflate_stream)
- add_filter(session, "bytes/out", function(t)
- local status, compressed, eof = pcall(deflate_stream, tostring(t), 'sync');
- if status == false then
- module:log("warn", "%s", tostring(compressed));
- session:close({
- condition = "undefined-condition";
- text = compressed;
- extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
- });
- return;
- end
- return compressed;
- end);
-end
-
--- setup decompression for a stream
-local function setup_decompression(session, inflate_stream)
- add_filter(session, "bytes/in", function(data)
- local status, decompressed, eof = pcall(inflate_stream, data);
- if status == false then
- module:log("warn", "%s", tostring(decompressed));
- session:close({
- condition = "undefined-condition";
- text = decompressed;
- extra = st.stanza("failure", {xmlns="http://jabber.org/protocol/compress"}):tag("processing-failed");
- });
- return;
- end
- return decompressed;
- end);
-end
-
-module:hook("stanza/http://jabber.org/protocol/compress:compressed", function(event)
- local session = event.origin;
-
- 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();
- session:open_stream(session.from_host, session.to_host);
- session.compressed = true;
- return true;
- end
-end);
-
-module:hook("stanza/http://jabber.org/protocol/compress:failure", function(event)
- local err = event.stanza:get_child();
- (event.origin.log or module._log)("warn", "Compression setup failed (%s)", err and err.name or "unknown reason");
- 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" 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.sends2s or session.send)(error_st);
- session.log("debug", "Client tried to establish another compression layer.");
- return true;
- end
-
- -- checking if the compression method is supported
- 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));
- local error_st = st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("unsupported-method");
- (session.sends2s or session.send)(error_st);
- else
- (session.sends2s or session.send)(st.stanza("failure", {xmlns=xmlns_compression_protocol}):tag("setup-failed"));
- end
- return true;
- end
-end);
-
+-- COMPAT w/ pre-0.10 configs
+error("mod_compression has been removed in Prosody 0.10+. Please see https://prosody.im/doc/modules/mod_compression for more information.");
diff --git a/util/cache.lua b/util/cache.lua
index 074916cd..54f3e10b 100644
--- a/util/cache.lua
+++ b/util/cache.lua
@@ -88,6 +88,18 @@ function cache_methods:items()
end
end
+function cache_methods:values()
+ local m = self._head;
+ return function ()
+ if not m then
+ return;
+ end
+ local v = m.value;
+ m = m.next;
+ return v;
+ end
+end
+
function cache_methods:count()
return self._count;
end
diff --git a/util/iterators.lua b/util/iterators.lua
index e553229e..bd150ff2 100644
--- a/util/iterators.lua
+++ b/util/iterators.lua
@@ -23,18 +23,18 @@ function it.reverse(f, s, var)
while true do
local ret = { f(s, var) };
var = ret[1];
- if var == nil then break; end
+ if var == nil then break; end
t_insert(results, 1, ret);
end
-- Then return our reverse one
local i,max = 0, #results;
return function (_results)
- if i<max then
- i = i + 1;
- return unpack(_results[i]);
- end
- end, results;
+ if i<max then
+ i = i + 1;
+ return unpack(_results[i]);
+ end
+ end, results;
end
-- Iterate only over keys in a table
@@ -54,6 +54,15 @@ function it.values(t)
end, t;
end
+-- Iterate over the n:th return value
+function it.select(n, f, s, var)
+ return function (_s)
+ local ret = pack(f(_s, var));
+ var = ret[1];
+ return ret[n];
+ end, s, var;
+end
+
-- Given an iterator, iterate only over unique items
function it.unique(f, s, var)
local set = {};
@@ -62,8 +71,8 @@ function it.unique(f, s, var)
while true do
local ret = pack(f(s, var));
var = ret[1];
- if var == nil then break; end
- if not set[var] then
+ if var == nil then break; end
+ if not set[var] then
set[var] = true;
return unpack(ret, 1, ret.n);
end
@@ -77,7 +86,7 @@ function it.count(f, s, var)
while true do
var = f(s, var);
- if var == nil then break; end
+ if var == nil then break; end
x = x + 1;
end
@@ -110,7 +119,7 @@ function it.tail(n, f, s, var)
while true do
local ret = pack(f(s, var));
var = ret[1];
- if var == nil then break; end
+ if var == nil then break; end
results[(count%n)+1] = ret;
count = count + 1;
end
@@ -157,7 +166,7 @@ function it.to_array(f, s, var)
local t = {};
while true do
var = f(s, var);
- if var == nil then break; end
+ if var == nil then break; end
t_insert(t, var);
end
return t;
@@ -169,7 +178,7 @@ function it.to_table(f, s, var)
local t, var2 = {};
while true do
var, var2 = f(s, var);
- if var == nil then break; end
+ if var == nil then break; end
t[var] = var2;
end
return t;