mirror of
https://github.com/bjc/prosody.git
synced 2025-04-07 07:07:38 +03:00
206 lines
7.3 KiB
Lua
206 lines
7.3 KiB
Lua
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module.host = "*" -- Global module
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local lxp = require "lxp";
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local init_xmlhandlers = require "core.xmlhandlers"
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local server = require "net.server";
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local httpserver = require "net.httpserver";
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local sm = require "core.sessionmanager";
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local new_uuid = require "util.uuid".generate;
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local fire_event = require "core.eventmanager".fire_event;
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local core_process_stanza = core_process_stanza;
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local st = require "util.stanza";
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local log = require "util.logger".init("bosh");
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local stream_callbacks = { stream_tag = "http://jabber.org/protocol/httpbind|body" };
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local xmlns_bosh = "http://jabber.org/protocol/httpbind"; -- (hard-coded into a literal in session.send)
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local BOSH_DEFAULT_HOLD = 1;
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local BOSH_DEFAULT_INACTIVITY = 30;
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local BOSH_DEFAULT_POLLING = 5;
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local BOSH_DEFAULT_REQUESTS = 2;
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local BOSH_DEFAULT_MAXPAUSE = 120;
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local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
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local os_time = os.time;
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local sessions = {};
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-- Used to respond to idle sessions
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local waiting_requests = {};
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function on_destroy_request(request)
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waiting_requests[request] = nil;
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end
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function handle_request(method, body, request)
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if (not body) or request.method ~= "POST" then
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--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>" };
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return "<html><body>You really don't look like a BOSH client to me... what do you want?</body></html>";
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end
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if not method then
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log("debug", "Request %s suffered error %s", tostring(request.id), body);
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return;
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end
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log("debug", "Handling new request %s: %s\n----------", request.id, tostring(body));
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request.notopen = true;
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request.log = log;
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local parser = lxp.new(init_xmlhandlers(request, stream_callbacks), "|");
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parser:parse(body);
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local session = sessions[request.sid];
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if session then
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local r = session.requests;
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log("debug", "Session %s has %d out of %d requests open", request.sid, #r, session.bosh_hold);
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log("debug", "and there are %d things in the send_buffer", #session.send_buffer);
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if #r > session.bosh_hold then
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-- We are holding too many requests, send what's in the buffer,
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log("debug", "We are holding too many requests, so...");
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if #session.send_buffer > 0 then
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log("debug", "...sending what is in the buffer")
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session.send(t_concat(session.send_buffer));
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session.send_buffer = {};
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return;
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else
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-- or an empty response
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log("debug", "...sending an empty response");
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session.send("");
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return;
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end
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elseif #session.send_buffer > 0 then
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log("debug", "Session has data in the send buffer, will send now..");
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local resp = t_concat(session.send_buffer);
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session.send_buffer = {};
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session.send(resp);
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return;
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end
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if not request.destroyed and session.bosh_wait then
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request.reply_before = os_time() + session.bosh_wait;
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request.on_destroy = on_destroy_request;
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waiting_requests[request] = true;
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end
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log("debug", "Had nothing to say, so leaving request unanswered for now");
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return true;
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end
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end
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local function bosh_reset_stream(session) session.notopen = true; end
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local function bosh_close_stream(session, reason) end
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function stream_callbacks.streamopened(request, attr)
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print("Attr:")
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for k,v in pairs(attr) do print("", k, v); end
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log("debug", "BOSH body open (sid: %s)", attr.sid);
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local sid = attr.sid
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if not sid then
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-- TODO: Sanity checks here (rid, to, known host, etc.)
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request.notopen = nil; -- Signals that we accept this opening tag
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-- New session
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sid = tostring(new_uuid());
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local session = { type = "c2s_unauthed", conn = {}, sid = sid, rid = attr.rid, host = attr.to, bosh_version = attr.ver, bosh_wait = attr.wait, streamid = sid,
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bosh_hold = BOSH_DEFAULT_HOLD,
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requests = { }, send_buffer = {}, reset_stream = bosh_reset_stream, close = bosh_close_stream };
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sessions[sid] = session;
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log("info", "New BOSH session, assigned it sid '%s'", sid);
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local r, send_buffer = session.requests, session.send_buffer;
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local response = { }
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function session.send(s)
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log("debug", "Sending BOSH data: %s", tostring(s));
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local oldest_request = r[1];
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while oldest_request and oldest_request.destroyed do
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t_remove(r, 1);
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waiting_requests[oldest_request] = nil;
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oldest_request = r[1];
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end
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if oldest_request then
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log("debug", "We have an open request, so using that to send with");
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response.body = t_concat{"<body xmlns='http://jabber.org/protocol/httpbind' sid='", sid, "' xmlns:stream = 'http://etherx.jabber.org/streams'>", tostring(s), "</body>" };
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oldest_request:send(response);
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log("debug", "Sent");
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if oldest_request.stayopen then
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if #r>1 then
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-- Move front request to back
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t_insert(r, oldest_request);
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t_remove(r, 1);
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end
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else
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log("debug", "Destroying the request now...");
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oldest_request:destroy();
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t_remove(r, 1);
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end
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elseif s ~= "" then
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log("debug", "Saved to send buffer because there are %d open requests", #r);
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-- Hmm, no requests are open :(
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t_insert(session.send_buffer, tostring(s));
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log("debug", "There are now %d things in the send_buffer", #session.send_buffer);
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end
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end
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-- Send creation response
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local features = st.stanza("stream:features");
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fire_event("stream-features", session, features);
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--xmpp:version='1.0' xmlns:xmpp='urn:xmpp:xbosh'
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local response = st.stanza("body", { xmlns = xmlns_bosh,
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inactivity = "30", polling = "5", requests = "2", hold = tostring(session.bosh_hold), maxpause = "120",
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sid = sid, ver = '1.6', from = session.host, secure = 'true', ["xmpp:version"] = "1.0",
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["xmlns:xmpp"] = "urn:xmpp:xbosh", ["xmlns:stream"] = "http://etherx.jabber.org/streams" }):add_child(features);
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request:send(tostring(response));
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request.sid = sid;
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return;
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end
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local session = sessions[sid];
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if not session then
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-- Unknown sid
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log("info", "Client tried to use sid '%s' which we don't know about", sid);
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request:send(tostring(st.stanza("body", { xmlns = xmlns_bosh, type = "terminate", condition = "item-not-found" })));
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request.notopen = nil;
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return;
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end
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if session.notopen then
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local features = st.stanza("stream:features");
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fire_event("stream-features", session, features);
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session.send(features);
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session.notopen = nil;
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end
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request.notopen = nil; -- Signals that we accept this opening tag
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t_insert(session.requests, request);
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request.sid = sid;
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end
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function stream_callbacks.handlestanza(request, stanza)
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log("debug", "BOSH stanza received: %s\n", stanza:pretty_print());
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local session = sessions[request.sid];
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if session then
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if stanza.attr.xmlns == xmlns_bosh then
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stanza.attr.xmlns = "jabber:client";
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end
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core_process_stanza(session, stanza);
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end
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end
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function on_timer()
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-- log("debug", "Checking for requests soon to timeout...");
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-- Identify requests timing out within the next few seconds
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local now = os_time() + 3;
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for request in pairs(waiting_requests) do
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if request.reply_before <= now then
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log("debug", "%s was soon to timeout, sending empty response", request.id);
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-- Send empty response to let the
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-- client know we're still here
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if request.conn then
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sessions[request.sid].send("");
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end
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end
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end
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end
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httpserver.new{ port = 5280, base = "http-bind", handler = handle_request, ssl = false}
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server.addtimer(on_timer);
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