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-rw-r--r--plugins/mod_bosh.lua416
1 files changed, 226 insertions, 190 deletions
diff --git a/plugins/mod_bosh.lua b/plugins/mod_bosh.lua
index 58254169..ca67db73 100644
--- a/plugins/mod_bosh.lua
+++ b/plugins/mod_bosh.lua
@@ -1,26 +1,27 @@
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
-module.host = "*" -- Global module
+module:set_global(); -- Global module
local hosts = _G.hosts;
-local lxp = require "lxp";
local new_xmpp_stream = require "util.xmppstream".new;
-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 = prosody.events.fire_event;
-local core_process_stanza = core_process_stanza;
+local core_process_stanza = prosody.core_process_stanza;
local st = require "util.stanza";
local logger = require "util.logger";
local log = logger.init("mod_bosh");
-local timer = require "util.timer";
+local initialize_filters = require "util.filters".initialize;
+local math_min = math.min;
+local xpcall, tostring, type = xpcall, tostring, type;
+local traceback = debug.traceback;
local xmlns_streams = "http://etherx.jabber.org/streams";
local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
@@ -29,36 +30,23 @@ local xmlns_bosh = "http://jabber.org/protocol/httpbind"; -- (hard-coded into a
local stream_callbacks = {
stream_ns = xmlns_bosh, stream_tag = "body", default_ns = "jabber:client" };
-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_HOLD = module:get_option_number("bosh_default_hold", 1);
+local BOSH_DEFAULT_INACTIVITY = module:get_option_number("bosh_max_inactivity", 60);
+local BOSH_DEFAULT_POLLING = module:get_option_number("bosh_max_polling", 5);
+local BOSH_DEFAULT_REQUESTS = module:get_option_number("bosh_max_requests", 2);
+local bosh_max_wait = module:get_option_number("bosh_max_wait", 120);
local consider_bosh_secure = module:get_option_boolean("consider_bosh_secure");
+local cross_domain = module:get_option("cross_domain_bosh", false);
-local default_headers = { ["Content-Type"] = "text/xml; charset=utf-8" };
-
-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
+if cross_domain == true then cross_domain = "*"; end
+if type(cross_domain) == "table" then cross_domain = table.concat(cross_domain, ", "); end
local trusted_proxies = module:get_option_set("trusted_proxies", {"127.0.0.1"})._items;
local function get_ip_from_request(request)
- local ip = request.handler:ip();
- local forwarded_for = request.headers["x-forwarded-for"];
+ local ip = request.conn:ip();
+ local forwarded_for = request.headers.x_forwarded_for;
if forwarded_for then
forwarded_for = forwarded_for..", "..ip;
for forwarded_ip in forwarded_for:gmatch("[^%s,]+") do
@@ -73,61 +61,91 @@ 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
+-- All sessions, and sessions that have no requests open
+local sessions, inactive_sessions = module:shared("sessions", "inactive_sessions");
-- Used to respond to idle sessions (those with waiting requests)
-local waiting_requests = {};
+local waiting_requests = module:shared("waiting_requests");
function on_destroy_request(request)
+ log("debug", "Request destroyed: %s", tostring(request));
waiting_requests[request] = nil;
- local session = sessions[request.sid];
+ local session = sessions[request.context.sid];
if session then
local requests = session.requests;
- for i,r in ipairs(requests) do
+ for i, r in ipairs(requests) do
if r == request then
t_remove(requests, i);
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]);
+ local max_inactive = session.bosh_max_inactive;
+ if max_inactive and #requests == 0 then
+ inactive_sessions[session] = os_time() + max_inactive;
+ (session.log or log)("debug", "BOSH session marked as inactive (for %ds)", max_inactive);
end
end
end
-function handle_request(method, body, request)
- if (not body) or request.method ~= "POST" then
- if request.method == "OPTIONS" then
- local headers = {};
- for k,v in pairs(default_headers) do headers[k] = v; end
- headers["Content-Type"] = nil;
- return { headers = headers, body = "" };
- else
- return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
- end
+local function set_cross_domain_headers(response)
+ local headers = response.headers;
+ headers.access_control_allow_methods = "GET, POST, OPTIONS";
+ headers.access_control_allow_headers = "Content-Type";
+ headers.access_control_max_age = "7200";
+ headers.access_control_allow_origin = cross_domain;
+ return response;
+end
+
+function handle_OPTIONS(event)
+ if cross_domain and event.request.headers.origin then
+ set_cross_domain_headers(event.response);
end
- if not method then
- log("debug", "Request %s suffered error %s", tostring(request.id), body);
- return;
+ return "";
+end
+
+function handle_POST(event)
+ log("debug", "Handling new request %s: %s\n----------", tostring(event.request), tostring(event.request.body));
+
+ local request, response = event.request, event.response;
+ response.on_destroy = on_destroy_request;
+ local body = request.body;
+
+ local context = { request = request, response = response, notopen = true };
+ local stream = new_xmpp_stream(context, stream_callbacks);
+ response.context = context;
+
+ local headers = response.headers;
+ headers.content_type = "text/xml; charset=utf-8";
+
+ if cross_domain and event.request.headers.origin then
+ set_cross_domain_headers(response);
end
- --log("debug", "Handling new request %s: %s\n----------", request.id, tostring(body));
- request.notopen = true;
- request.log = log;
- request.on_destroy = on_destroy_request;
-
- local stream = new_xmpp_stream(request, stream_callbacks);
+
-- stream:feed() calls the stream_callbacks, so all stanzas in
-- the body are processed in this next line before it returns.
- stream:feed(body);
-
- local session = sessions[request.sid];
+ -- In particular, the streamopened() stream callback is where
+ -- much of the session logic happens, because it's where we first
+ -- get to see the 'sid' of this request.
+ if not stream:feed(body) then
+ module:log("warn", "Error parsing BOSH payload")
+ return 400;
+ end
+
+ -- Stanzas (if any) in the request have now been processed, and
+ -- we take care of the high-level BOSH logic here, including
+ -- giving a response or putting the request "on hold".
+ local session = sessions[context.sid];
if session then
+ -- Session was marked as inactive, since we have
+ -- a request open now, unmark it
+ if inactive_sessions[session] and #session.requests > 0 then
+ inactive_sessions[session] = nil;
+ end
+
local r = session.requests;
- log("debug", "Session %s has %d out of %d requests open", request.sid, #r, session.bosh_hold);
- log("debug", "and there are %d things in the send_buffer", #session.send_buffer);
+ log("debug", "Session %s has %d out of %d requests open", context.sid, #r, session.bosh_hold);
+ log("debug", "and there are %d things in the send_buffer:", #session.send_buffer);
if #r > session.bosh_hold then
-- We are holding too many requests, send what's in the buffer,
log("debug", "We are holding too many requests, so...");
@@ -146,23 +164,25 @@ function handle_request(method, body, request)
session.send_buffer = {};
session.send(resp);
end
-
- if not request.destroyed then
+
+ if not response.finished then
-- We're keeping this request open, to respond later
log("debug", "Have nothing to say, so leaving request unanswered for now");
if session.bosh_wait then
- request.reply_before = os_time() + session.bosh_wait;
- waiting_requests[request] = true;
- end
- if inactive_sessions[session] then
- -- Session was marked as inactive, since we have
- -- a request open now, unmark it
- inactive_sessions[session] = nil;
+ waiting_requests[response] = os_time() + session.bosh_wait;
end
end
-
- return true; -- Inform httpserver we shall reply later
+
+ if session.bosh_terminate then
+ session.log("debug", "Closing session with %d requests open", #session.requests);
+ session:close();
+ return nil;
+ else
+ return true; -- Inform http server we shall reply later
+ end
end
+ module:log("warn", "Unable to associate request with a session (incomplete request?)");
+ return 400;
end
@@ -172,10 +192,10 @@ local stream_xmlns_attr = { xmlns = "urn:ietf:params:xml:ns:xmpp-streams" };
local function bosh_close_stream(session, reason)
(session.log or log)("info", "BOSH client disconnected");
-
+
local close_reply = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate",
- ["xmlns:streams"] = xmlns_streams });
-
+ ["xmlns:stream"] = xmlns_streams });
+
if reason then
close_reply.attr.condition = "remote-stream-error";
@@ -199,115 +219,105 @@ local function bosh_close_stream(session, reason)
log("info", "Disconnecting client, <stream:error> is: %s", tostring(close_reply));
end
- local session_close_response = { headers = default_headers, body = tostring(close_reply) };
-
- --FIXME: Quite sure we shouldn't reply to all requests with the error
+ local response_body = tostring(close_reply);
for _, held_request in ipairs(session.requests) do
- held_request:send(session_close_response);
- held_request:destroy();
+ held_request:send(response_body);
end
- sessions[session.sid] = nil;
+ sessions[session.sid] = nil;
+ inactive_sessions[session] = nil;
sm_destroy_session(session);
end
-function stream_callbacks.streamopened(request, attr)
- log("debug", "BOSH body open (sid: %s)", attr.sid);
- local sid = attr.sid
+-- Handle the <body> tag in the request payload.
+function stream_callbacks.streamopened(context, attr)
+ local request, response = context.request, context.response;
+ local sid = attr.sid;
+ log("debug", "BOSH body open (sid: %s)", sid or "<none>");
if not sid then
-- New session request
- request.notopen = nil; -- Signals that we accept this opening tag
-
+ context.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));
local close_reply = st.stanza("body", { xmlns = xmlns_bosh, type = "terminate",
- ["xmlns:streams"] = xmlns_streams, condition = "host-unknown" });
- request:send(tostring(close_reply));
+ ["xmlns:stream"] = xmlns_streams, condition = "host-unknown" });
+ response:send(tostring(close_reply));
return;
end
-
+
-- New session
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,
+ type = "c2s_unauthed", conn = {}, sid = sid, rid = tonumber(attr.rid)-1, host = attr.to,
+ bosh_version = attr.ver, bosh_wait = math_min(attr.wait, bosh_max_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,
+ close = bosh_close_stream, dispatch_stanza = core_process_stanza, notopen = true,
log = logger.init("bosh"..sid), secure = consider_bosh_secure or request.secure,
ip = get_ip_from_request(request);
};
sessions[sid] = session;
-
+
+ local filter = initialize_filters(session);
+
session.log("debug", "BOSH session created for request from %s", session.ip);
log("info", "New BOSH session, assigned it sid '%s'", sid);
- local r, send_buffer = session.requests, session.send_buffer;
- local response = { headers = default_headers }
+
+ -- Send creation response
+ local creating_session = true;
+
+ local r = session.requests;
function session.send(s)
-- We need to ensure that outgoing stanzas have the jabber:client xmlns
if s.attr and not s.attr.xmlns then
s = st.clone(s);
s.attr.xmlns = "jabber:client";
end
+ s = filter("stanzas/out", s);
--log("debug", "Sending BOSH data: %s", tostring(s));
+ t_insert(session.send_buffer, tostring(s));
+
local oldest_request = r[1];
- if oldest_request then
+ if oldest_request and not session.bosh_processing then
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");
- if oldest_request.stayopen then
- if #r>1 then
- -- Move front request to back
- t_insert(r, oldest_request);
- t_remove(r, 1);
- end
- else
- log("debug", "Destroying the request now...");
- oldest_request:destroy();
+ local body_attr = { xmlns = "http://jabber.org/protocol/httpbind",
+ ["xmlns:stream"] = "http://etherx.jabber.org/streams";
+ type = session.bosh_terminate and "terminate" or nil;
+ sid = sid;
+ };
+ if creating_session then
+ creating_session = nil;
+ body_attr.inactivity = tostring(BOSH_DEFAULT_INACTIVITY);
+ body_attr.polling = tostring(BOSH_DEFAULT_POLLING);
+ body_attr.requests = tostring(BOSH_DEFAULT_REQUESTS);
+ body_attr.wait = tostring(session.bosh_wait);
+ body_attr.hold = tostring(session.bosh_hold);
+ body_attr.authid = sid;
+ body_attr.secure = "true";
+ body_attr.ver = '1.6';
+ body_attr.from = session.host;
+ body_attr["xmlns:xmpp"] = "urn:xmpp:xbosh";
+ body_attr["xmpp:version"] = "1.0";
end
- elseif s ~= "" then
- log("debug", "Saved to send buffer because there are %d open requests", #r);
- -- Hmm, no requests are open :(
- t_insert(session.send_buffer, tostring(s));
- log("debug", "There are now %d things in the send_buffer", #session.send_buffer);
+ oldest_request:send(st.stanza("body", body_attr):top_tag()..t_concat(session.send_buffer).."</body>");
+ session.send_buffer = {};
end
+ return true;
end
-
- -- Send creation response
-
- local features = st.stanza("stream:features");
- hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
- fire_event("stream-features", session, features);
- --xmpp:version='1.0' xmlns:xmpp='urn:xmpp:xbosh'
- local response = st.stanza("body", { xmlns = xmlns_bosh,
- wait = attr.wait,
- inactivity = tostring(BOSH_DEFAULT_INACTIVITY),
- polling = tostring(BOSH_DEFAULT_POLLING),
- requests = tostring(BOSH_DEFAULT_REQUESTS),
- hold = tostring(session.bosh_hold),
- 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{ headers = default_headers, body = tostring(response) };
-
request.sid = sid;
- return;
end
-
+
local session = sessions[sid];
if not session then
-- Unknown sid
log("info", "Client tried to use sid '%s' which we don't know about", sid);
- request:send{ headers = default_headers, body = tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })) };
- request.notopen = nil;
+ response:send(tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })));
+ context.notopen = nil;
return;
end
-
+
if session.rid then
local rid = tonumber(attr.rid);
local diff = rid - session.rid;
@@ -315,56 +325,71 @@ function stream_callbacks.streamopened(request, attr)
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: %s (diff %d)", request.id, session.rid, diff);
- request.notopen = nil;
- request.ignore = true;
- request.sid = sid;
- t_insert(session.requests, request);
+ session.log("debug", "rid repeated, ignoring: %s (diff %d)", session.rid, diff);
+ context.notopen = nil;
+ context.ignore = true;
+ context.sid = sid;
+ t_insert(session.requests, response);
return;
end
session.rid = rid;
end
-
+
if attr.type == "terminate" then
- -- Client wants to end this session
- session:close();
- request.notopen = nil;
- return;
+ -- Client wants to end this session, which we'll do
+ -- after processing any stanzas in this request
+ session.bosh_terminate = true;
end
-
+
+ context.notopen = nil; -- Signals that we accept this opening tag
+ t_insert(session.requests, response);
+ context.sid = sid;
+ session.bosh_processing = true; -- Used to suppress replies until processing of this request is done
+
if session.notopen then
local features = st.stanza("stream:features");
hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
- fire_event("stream-features", session, features);
session.send(features);
session.notopen = nil;
end
-
- request.notopen = nil; -- Signals that we accept this opening tag
- t_insert(session.requests, request);
- request.sid = sid;
end
-function stream_callbacks.handlestanza(request, stanza)
- if request.ignore then return; end
+local function handleerr(err) log("error", "Traceback[bosh]: %s", traceback(tostring(err), 2)); end
+function stream_callbacks.handlestanza(context, stanza)
+ if context.ignore then return; end
log("debug", "BOSH stanza received: %s\n", stanza:top_tag());
- local session = sessions[request.sid];
+ local session = sessions[context.sid];
if session then
if stanza.attr.xmlns == xmlns_bosh then
stanza.attr.xmlns = nil;
end
- core_process_stanza(session, stanza);
+ stanza = session.filter("stanzas/in", stanza);
+ if stanza then
+ return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
+ end
+ end
+end
+
+function stream_callbacks.streamclosed(context)
+ local session = sessions[context.sid];
+ if session then
+ session.bosh_processing = false;
+ if #session.send_buffer > 0 then
+ session.send("");
+ end
end
end
-function stream_callbacks.error(request, error)
+function stream_callbacks.error(context, error)
log("debug", "Error parsing BOSH request payload; %s", error);
- if not request.sid then
- request:send({ headers = default_headers, status = "400 Bad Request" });
+ if not context.sid then
+ local response = context.response;
+ response.status_code = 400;
+ response:send();
return;
end
-
- local session = sessions[request.sid];
+
+ local session = sessions[context.sid];
if error == "stream-error" then -- Remote stream error, we close normally
session:close();
else
@@ -372,35 +397,31 @@ function stream_callbacks.error(request, error)
end
end
-local dead_sessions = {};
+local dead_sessions = module:shared("dead_sessions");
function on_timer()
-- 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.reply_before <= now then
- log("debug", "%s was soon to timeout, sending empty response", request.id);
+ for request, reply_before in pairs(waiting_requests) do
+ if reply_before <= now then
+ log("debug", "%s was soon to timeout (at %d, now %d), sending empty response", tostring(request), reply_before, now);
-- Send empty response to let the
-- client know we're still here
if request.conn then
- sessions[request.sid].send("");
+ sessions[request.context.sid].send("");
end
end
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
+ for session, close_after in pairs(inactive_sessions) do
+ if close_after < now 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
end
@@ -411,15 +432,30 @@ function on_timer()
end
return 1;
end
+module:add_timer(1, on_timer);
-local function setup()
- local ports = module:get_option("bosh_ports") or { 5280 };
- httpserver.new_from_config(ports, handle_request, { base = "http-bind" });
- timer.add_task(1, on_timer);
-end
-if prosody.start_time then -- already started
- setup();
-else
- prosody.events.add_handler("server-started", setup);
+local GET_response = {
+ headers = {
+ content_type = "text/html";
+ };
+ body = [[<html><body>
+ <p>It works! Now point your BOSH client to this URL to connect to Prosody.</p>
+ <p>For more information see <a href="http://prosody.im/doc/setting_up_bosh">Prosody: Setting up BOSH</a>.</p>
+ </body></html>]];
+};
+
+function module.add_host(module)
+ module:depends("http");
+ module:provides("http", {
+ default_path = "/http-bind";
+ route = {
+ ["GET"] = GET_response;
+ ["GET /"] = GET_response;
+ ["OPTIONS"] = handle_OPTIONS;
+ ["OPTIONS /"] = handle_OPTIONS;
+ ["POST"] = handle_POST;
+ ["POST /"] = handle_POST;
+ };
+ });
end
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-24 20:53:59 +0000