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authorMatthew Wild <mwild1@gmail.com>2008-12-22 22:19:42 +0000
committerMatthew Wild <mwild1@gmail.com>2008-12-22 22:19:42 +0000
commite0cb7cec734ca29f49870f5633cfc738e320f232 (patch)
treeef7a4097638f4a71d53e84560f23ec9586c221c9 /plugins
parent8ef6e94079631975a8443638db11e9e833e53e47 (diff)
downloadprosody-e0cb7cec734ca29f49870f5633cfc738e320f232.tar.gz
prosody-e0cb7cec734ca29f49870f5633cfc738e320f232.zip
Initial mod_bosh, works, kind of, but quite incomplete
Diffstat (limited to 'plugins')
-rw-r--r--plugins/mod_bosh.lua211
1 files changed, 211 insertions, 0 deletions
diff --git a/plugins/mod_bosh.lua b/plugins/mod_bosh.lua
new file mode 100644
index 00000000..776c3145
--- /dev/null
+++ b/plugins/mod_bosh.lua
@@ -0,0 +1,211 @@
+
+module.host = "*" -- Global module
+
+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 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 xmlns_bosh = "http://jabber.org/protocol/httpbind"; -- (hard-coded into a literal in session.send)
+
+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 t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
+local os_time = os.time;
+
+local sessions = {};
+
+-- Used to respond to idle sessions
+local waiting_requests = {};
+function on_destroy_request(request)
+ waiting_requests[request] = nil;
+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>";
+ end
+ 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));
+ request.notopen = true;
+ request.log = log;
+ local parser = lxp.new(init_xmlhandlers(request, stream_callbacks), "|");
+
+ parser:parse(body);
+
+ local session = sessions[request.sid];
+ if session then
+ 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);
+ 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...");
+ if #session.send_buffer > 0 then
+ 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
+ request.reply_before = os_time() + session.bosh_wait;
+ request.on_destroy = on_destroy_request;
+ waiting_requests[request] = true;
+ end
+
+ log("debug", "Had 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
+
+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.)
+ request.notopen = nil; -- Signals that we accept this opening tag
+
+ -- 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 };
+ sessions[sid] = session;
+ log("info", "New BOSH session, assigned it sid '%s'", sid);
+ local r, send_buffer = session.requests, session.send_buffer;
+ local response = { }
+ function session.send(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);
+ waiting_requests[oldest_request] = nil;
+ oldest_request = r[1];
+ end
+ if oldest_request then
+ log("debug", "We have an open request, so using that to send with");
+ 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();
+ t_remove(r, 1);
+ 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);
+ end
+ end
+
+ -- Send creation response
+
+ 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",
+ ["xmlns:xmpp"] = "urn:xmpp:xbosh", ["xmlns:stream"] = "http://etherx.jabber.org/streams" }):add_child(features);
+ request:send(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(tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })));
+ request.notopen = nil;
+ return;
+ end
+
+ if session.notopen then
+ local features = st.stanza("stream: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)
+ log("debug", "BOSH stanza received: %s\n", stanza:pretty_print());
+ local session = sessions[request.sid];
+ if session then
+ if stanza.attr.xmlns == xmlns_bosh then
+ stanza.attr.xmlns = "jabber:client";
+ end
+ core_process_stanza(session, stanza);
+ end
+end
+
+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);
+ -- Send empty response to let the
+ -- client know we're still here
+ 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
+ end
+end
+
+httpserver.new{ port = 5280, base = "http-bind", handler = handle_request, ssl = false}
+server.addtimer(on_timer); \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 13:32:42 +0000