+-- Prosody IM
+-- Copyright (C) 2008-2009 Matthew Wild
+-- Copyright (C) 2008-2009 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
module.host = "*" -- Global module
+local hosts = _G.hosts;
local lxp = require "lxp";
local init_xmlhandlers = require "core.xmlhandlers"
local server = require "net.server";
local httpserver = require "net.httpserver";
local sm = require "core.sessionmanager";
+local sm_destroy_session = sm.destroy_session;
local new_uuid = require "util.uuid".generate;
local fire_event = require "core.eventmanager".fire_event;
local core_process_stanza = core_process_stanza;
local st = require "util.stanza";
-local log = require "util.logger".init("bosh");
-local stream_callbacks = { stream_tag = "http://jabber.org/protocol/httpbind|body" };
+local logger = require "util.logger";
+local log = logger.init("mod_bosh");
local xmlns_bosh = "http://jabber.org/protocol/httpbind"; -- (hard-coded into a literal in session.send)
+local stream_callbacks = { stream_ns = "http://jabber.org/protocol/httpbind", stream_tag = "body", default_ns = xmlns_bosh };
-local BOSH_DEFAULT_HOLD = 1;
-local BOSH_DEFAULT_INACTIVITY = 30;
-local BOSH_DEFAULT_POLLING = 5;
-local BOSH_DEFAULT_REQUESTS = 2;
-local BOSH_DEFAULT_MAXPAUSE = 120;
+local BOSH_DEFAULT_HOLD = tonumber(module:get_option("bosh_default_hold")) or 1;
+local BOSH_DEFAULT_INACTIVITY = tonumber(module:get_option("bosh_max_inactivity")) or 60;
+local BOSH_DEFAULT_POLLING = tonumber(module:get_option("bosh_max_polling")) or 5;
+local BOSH_DEFAULT_REQUESTS = tonumber(module:get_option("bosh_max_requests")) or 2;
+local BOSH_DEFAULT_MAXPAUSE = tonumber(module:get_option("bosh_max_pause")) or 300;
+
+local default_headers = { ["Content-Type"] = "text/xml; charset=utf-8" };
+local session_close_reply = { headers = default_headers, body = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate" }), attr = {} };
+
+local cross_domain = module:get_option("cross_domain_bosh");
+if cross_domain then
+ default_headers["Access-Control-Allow-Methods"] = "GET, POST, OPTIONS";
+ default_headers["Access-Control-Allow-Headers"] = "Content-Type";
+ default_headers["Access-Control-Max-Age"] = "7200";
+
+ if cross_domain == true then
+ default_headers["Access-Control-Allow-Origin"] = "*";
+ elseif type(cross_domain) == "table" then
+ cross_domain = table.concat(cross_domain, ", ");
+ end
+ if type(cross_domain) == "string" then
+ default_headers["Access-Control-Allow-Origin"] = cross_domain;
+ end
+end
local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
local os_time = os.time;
local sessions = {};
+local inactive_sessions = {}; -- Sessions which have no open requests
--- Used to respond to idle sessions
+-- Used to respond to idle sessions (those with waiting requests)
local waiting_requests = {};
function on_destroy_request(request)
waiting_requests[request] = nil;
+ local session = sessions[request.sid];
+ if session then
+ local requests = session.requests;
+ for i,r in pairs(requests) do
+ if r == request then requests[i] = nil; break; end
+ end
+
+ -- If this session now has no requests open, mark it as inactive
+ if #requests == 0 and session.bosh_max_inactive and not inactive_sessions[session] then
+ inactive_sessions[session] = os_time();
+ (session.log or log)("debug", "BOSH session marked as inactive at %d", inactive_sessions[session]);
+ end
+ end
end
function handle_request(method, body, request)
if (not body) or request.method ~= "POST" then
- --return { status = "200 OK", headers = { ["Content-Type"] = "text/html" }, body = "<html><body>You don't look like a BOSH client to me... what do you want?</body></html>" };
- return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
+ if request.method == "OPTIONS" then
+ return { headers = default_headers, body = "" };
+ else
+ return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
+ end
end
- if not method then
+ if not method then
log("debug", "Request %s suffered error %s", tostring(request.id), body);
return;
end
- log("debug", "Handling new request %s: %s\n----------", request.id, tostring(body));
+ --log("debug", "Handling new request %s: %s\n----------", request.id, tostring(body));
request.notopen = true;
request.log = log;
- local parser = lxp.new(init_xmlhandlers(request, stream_callbacks), "|");
+ local parser = lxp.new(init_xmlhandlers(request, stream_callbacks), "\1");
parser:parse(body);
log("debug", "...sending what is in the buffer")
session.send(t_concat(session.send_buffer));
session.send_buffer = {};
- return;
else
-- or an empty response
log("debug", "...sending an empty response");
session.send("");
- return;
end
elseif #session.send_buffer > 0 then
log("debug", "Session has data in the send buffer, will send now..");
local resp = t_concat(session.send_buffer);
session.send_buffer = {};
session.send(resp);
- return;
end
if not request.destroyed and session.bosh_wait then
waiting_requests[request] = true;
end
- log("debug", "Had nothing to say, so leaving request unanswered for now");
+ log("debug", "Have nothing to say, so leaving request unanswered for now");
return true;
end
end
+
local function bosh_reset_stream(session) session.notopen = true; end
-local function bosh_close_stream(session, reason) end
+
+local function bosh_close_stream(session, reason)
+ (session.log or log)("info", "BOSH client disconnected");
+ session_close_reply.attr.condition = reason;
+ for _, held_request in ipairs(session.requests) do
+ held_request:send(session_close_reply);
+ held_request:destroy();
+ end
+ sessions[session.sid] = nil;
+ sm_destroy_session(session);
+end
function stream_callbacks.streamopened(request, attr)
- print("Attr:")
- for k,v in pairs(attr) do print("", k, v); end
log("debug", "BOSH body open (sid: %s)", attr.sid);
local sid = attr.sid
if not sid then
- -- TODO: Sanity checks here (rid, to, known host, etc.)
+ -- New session request
request.notopen = nil; -- Signals that we accept this opening tag
+ -- TODO: Sanity checks here (rid, to, known host, etc.)
+ if not hosts[attr.to] then
+ -- Unknown host
+ log("debug", "BOSH client tried to connect to unknown host: %s", tostring(attr.to));
+ session_close_reply.body.attr.condition = "host-unknown";
+ request:send(session_close_reply);
+ request.notopen = nil
+ return;
+ end
+
-- New session
- sid = tostring(new_uuid());
- local session = { type = "c2s_unauthed", conn = {}, sid = sid, rid = attr.rid, host = attr.to, bosh_version = attr.ver, bosh_wait = attr.wait, streamid = sid,
- bosh_hold = BOSH_DEFAULT_HOLD,
- requests = { }, send_buffer = {}, reset_stream = bosh_reset_stream, close = bosh_close_stream };
+ sid = new_uuid();
+ local session = { type = "c2s_unauthed", conn = {}, sid = sid, rid = tonumber(attr.rid), host = attr.to, bosh_version = attr.ver, bosh_wait = attr.wait, streamid = sid,
+ bosh_hold = BOSH_DEFAULT_HOLD, bosh_max_inactive = BOSH_DEFAULT_INACTIVITY,
+ requests = { }, send_buffer = {}, reset_stream = bosh_reset_stream, close = bosh_close_stream,
+ dispatch_stanza = core_process_stanza, log = logger.init("bosh"..sid), secure = request.secure };
sessions[sid] = session;
+
log("info", "New BOSH session, assigned it sid '%s'", sid);
local r, send_buffer = session.requests, session.send_buffer;
- local response = { }
+ local response = { headers = default_headers }
function session.send(s)
- log("debug", "Sending BOSH data: %s", tostring(s));
+ --log("debug", "Sending BOSH data: %s", tostring(s));
local oldest_request = r[1];
while oldest_request and oldest_request.destroyed do
t_remove(r, 1);
oldest_request = r[1];
end
if oldest_request then
- log("debug", "We have an open request, so using that to send with");
+ log("debug", "We have an open request, so sending on that");
response.body = t_concat{"<body xmlns='http://jabber.org/protocol/httpbind' sid='", sid, "' xmlns:stream = 'http://etherx.jabber.org/streams'>", tostring(s), "</body>" };
oldest_request:send(response);
- log("debug", "Sent");
+ --log("debug", "Sent");
if oldest_request.stayopen then
if #r>1 then
-- Move front request to back
local features = st.stanza("stream:features");
fire_event("stream-features", session, features);
--xmpp:version='1.0' xmlns:xmpp='urn:xmpp:xbosh'
- local response = st.stanza("body", { xmlns = xmlns_bosh,
- inactivity = "30", polling = "5", requests = "2", hold = tostring(session.bosh_hold), maxpause = "120",
- sid = sid, ver = '1.6', from = session.host, secure = 'true', ["xmpp:version"] = "1.0",
+ local response = st.stanza("body", { xmlns = xmlns_bosh,
+ inactivity = tostring(BOSH_DEFAULT_INACTIVITY), polling = tostring(BOSH_DEFAULT_POLLING), requests = tostring(BOSH_DEFAULT_REQUESTS), hold = tostring(session.bosh_hold), maxpause = "120",
+ sid = sid, authid = sid, ver = '1.6', from = session.host, secure = 'true', ["xmpp:version"] = "1.0",
["xmlns:xmpp"] = "urn:xmpp:xbosh", ["xmlns:stream"] = "http://etherx.jabber.org/streams" }):add_child(features);
- request:send(tostring(response));
-
+ request:send{ headers = default_headers, body = tostring(response) };
+
request.sid = sid;
return;
end
if not session then
-- Unknown sid
log("info", "Client tried to use sid '%s' which we don't know about", sid);
- request:send(tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })));
+ request:send{ headers = default_headers, body = tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })) };
+ request.notopen = nil;
+ return;
+ end
+
+ if session.rid then
+ local rid = tonumber(attr.rid);
+ local diff = rid - session.rid;
+ if diff > 1 then
+ session.log("warn", "rid too large (means a request was lost). Last rid: %d New rid: %s", session.rid, attr.rid);
+ elseif diff <= 0 then
+ -- Repeated, ignore
+ session.log("debug", "rid repeated (on request %s), ignoring: %d", request.id, session.rid);
+ request.notopen = nil;
+ t_insert(session.requests, request);
+ return;
+ end
+ session.rid = rid;
+ end
+
+ if attr.type == "terminate" then
+ -- Client wants to end this session
+ session:close();
request.notopen = nil;
return;
end
+ -- If session was inactive, make sure it is now marked as not
+ if #session.requests == 0 then
+ (session.log or log)("debug", "BOSH client now active again at %d", os_time());
+ inactive_sessions[session] = nil;
+ end
+
if session.notopen then
local features = st.stanza("stream:features");
fire_event("stream-features", session, features);
end
function stream_callbacks.handlestanza(request, stanza)
- log("debug", "BOSH stanza received: %s\n", stanza:pretty_print());
+ log("debug", "BOSH stanza received: %s\n", stanza:top_tag());
local session = sessions[request.sid];
if session then
if stanza.attr.xmlns == xmlns_bosh then
stanza.attr.xmlns = "jabber:client";
end
+ session.ip = request.handler:ip();
core_process_stanza(session, stanza);
end
end
+local dead_sessions = {};
function on_timer()
- log("debug", "Checking for requests soon to timeout...");
+ -- log("debug", "Checking for requests soon to timeout...");
-- Identify requests timing out within the next few seconds
local now = os_time() + 3;
for request in pairs(waiting_requests) do
if request.conn then
sessions[request.sid].send("");
end
- else
- log("debug", "%s timing out in %ds [destroyed: %s]", request.id, request.reply_before - now, tostring(request.destroyed));
end
- if not request.on_destroy then
- log("warn", "%s has no on_destroy!", request.id);
+ end
+
+ now = now - 3;
+ local n_dead_sessions = 0;
+ for session, inactive_since in pairs(inactive_sessions) do
+ if session.bosh_max_inactive then
+ if now - inactive_since > session.bosh_max_inactive then
+ (session.log or log)("debug", "BOSH client inactive too long, destroying session at %d", now);
+ sessions[session.sid] = nil;
+ inactive_sessions[session] = nil;
+ n_dead_sessions = n_dead_sessions + 1;
+ dead_sessions[n_dead_sessions] = session;
+ end
+ else
+ inactive_sessions[session] = nil;
end
end
+
+ for i=1,n_dead_sessions do
+ local session = dead_sessions[i];
+ dead_sessions[i] = nil;
+ sm_destroy_session(session, "BOSH client silent for over "..session.bosh_max_inactive.." seconds");
+ end
end
-httpserver.new{ port = 5280, base = "http-bind", handler = handle_request, ssl = false}
-server.addtimer(on_timer);
\ No newline at end of file
+
+local function setup()
+ local ports = module:get_option("bosh_ports") or { 5280 };
+ httpserver.new_from_config(ports, handle_request, { base = "http-bind" });
+ server.addtimer(on_timer);
+end
+if prosody.start_time then -- already started
+ setup();
+else
+ prosody.events.add_handler("server-started", setup);
+end
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