504 lines
17 KiB
Lua
504 lines
17 KiB
Lua
local st = require "util.stanza";
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local jid = require "util.jid";
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local http = require "net.http";
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local json = require "cjson";
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local inspect = require('inspect');
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local socket = require "socket";
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local uuid_gen = require "util.uuid".generate;
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local jwt = require "luajwtjitsi";
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local it = require "util.iterators";
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local neturl = require "net.url";
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local parse = neturl.parseQuery;
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local get_room_from_jid = module:require "util".get_room_from_jid;
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local room_jid_match_rewrite = module:require "util".room_jid_match_rewrite;
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local is_healthcheck_room = module:require "util".is_healthcheck_room;
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local room_jid_split_subdomain = module:require "util".room_jid_split_subdomain;
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local internal_room_jid_match_rewrite = module:require "util".internal_room_jid_match_rewrite;
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local async_handler_wrapper = module:require "util".async_handler_wrapper;
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-- this basically strips the domain from the conference.domain address
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local parentHostName = string.gmatch(tostring(module.host), "%w+.(%w.+)")();
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if parentHostName == nil then
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log("error", "Failed to start - unable to get parent hostname");
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return;
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end
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local parentCtx = module:context(parentHostName);
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if parentCtx == nil then
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log("error",
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"Failed to start - unable to get parent context for host: %s",
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tostring(parentHostName));
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return;
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end
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local token_util = module:require "token/util".new(parentCtx);
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local ASAPKeyServer
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= module:get_option_string("asap_key_server");
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if ASAPKeyServer then
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module:log("info", "ASAP Public Key URL %s", ASAPKeyServer);
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token_util:set_asap_key_server(ASAPKeyServer);
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end
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local ASAPKeyPath
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= module:get_option_string("asap_key_path", '/etc/prosody/certs/asap.key');
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local ASAPKeyId
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= module:get_option_string("asap_key_id", 'jitsi');
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local ASAPIssuer
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= module:get_option_string("asap_issuer", 'jitsi');
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local ASAPAudience
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= module:get_option_string("asap_audience", 'jibriqueue');
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local ASAPTTL
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= module:get_option_number("asap_ttl", 3600);
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local ASAPTTL_THRESHOLD
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= module:get_option_number("asap_ttl_threshold", 600);
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local ASAPKey;
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local queueServiceURL
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= module:get_option_string("jibri_queue_url");
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local JibriRegion
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= module:get_option_string("jibri_region");
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if queueServiceURL == nil then
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log("error", "No jibri_queue_url specified. No service to contact!");
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return;
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end
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-- option to enable/disable token verifications
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local disableTokenVerification
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= module:get_option_boolean("disable_jibri_queue_token_verification", false);
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local http_headers = {
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["User-Agent"] = "Prosody ("..prosody.version.."; "..prosody.platform..")",
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["Content-Type"] = "application/json"
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};
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-- we use async to detect Prosody 0.10 and earlier
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local have_async = pcall(require, "util.async");
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if not have_async then
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module:log("warn", "conference duration will not work with Prosody version 0.10 or less.");
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return;
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end
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local muc_component_host = module:get_option_string("muc_component");
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if muc_component_host == nil then
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log("error", "No muc_component specified. No muc to operate on for jibri queue!");
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return;
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end
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log("info", "Starting jibri queue handling for %s", muc_component_host);
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local external_api_url = module:get_option_string("external_api_url",tostring(parentHostName));
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module:log("info", "External advertised API URL", external_api_url);
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-- Read ASAP key once on module startup
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local f = io.open(ASAPKeyPath, "r");
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if f then
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ASAPKey = f:read("*all");
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f:close();
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if not ASAPKey then
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module:log("warn", "No ASAP Key read, disabling muc_events plugin");
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return
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end
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else
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module:log("warn", "Error reading ASAP Key, disabling muc_events plugin");
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return
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end
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-- TODO: Figure out a less arbitrary default cache size.
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local jwtKeyCacheSize = module:get_option_number("jwt_pubkey_cache_size", 128);
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local jwtKeyCache = require"util.cache".new(jwtKeyCacheSize);
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local function round(num, numDecimalPlaces)
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local mult = 10^(numDecimalPlaces or 0)
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return math.floor(num * mult + 0.5) / mult
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end
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local function generateToken(audience)
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audience = audience or ASAPAudience
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local t = os.time()
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local err
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local exp_key = 'asap_exp.'..audience
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local token_key = 'asap_token.'..audience
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local exp = jwtKeyCache:get(exp_key)
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local token = jwtKeyCache:get(token_key)
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--if we find a token and it isn't too far from expiry, then use it
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if token ~= nil and exp ~= nil then
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exp = tonumber(exp)
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if (exp - t) > ASAPTTL_THRESHOLD then
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return token
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end
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end
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--expiry is the current time plus TTL
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exp = t + ASAPTTL
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local payload = {
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iss = ASAPIssuer,
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aud = audience,
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nbf = t,
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exp = exp,
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}
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-- encode
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local alg = "RS256"
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token, err = jwt.encode(payload, ASAPKey, alg, {kid = ASAPKeyId})
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if not err then
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token = 'Bearer '..token
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jwtKeyCache:set(exp_key,exp)
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jwtKeyCache:set(token_key,token)
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return token
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else
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return ''
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end
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end
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local function sendIq(participant,action,requestId,time,position,token)
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local iqId = uuid_gen();
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local from = module:get_host();
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module:log("info","Oubound iq id %s",iqId);
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local outStanza = st.iq({type = 'set', from = from, to = participant, id = iqId}):tag("jibri-queue",
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{ xmlns = 'http://jitsi.org/protocol/jibri-queue', requestId = requestId, action = action });
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module:log("info","Oubound base stanza %s",inspect(outStanza));
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if token then
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outStanza:tag("token"):text(token):up()
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end
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if time then
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outStanza:tag("time"):text(time):up()
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end
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if position then
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outStanza:tag("position"):text(position):up()
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end
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module:log("info","Oubound stanza %s",inspect(outStanza));
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module:send(outStanza);
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end
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local function cb(content_, code_, response_, request_)
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if code_ == 200 or code_ == 204 then
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module:log("debug", "URL Callback: Code %s, Content %s, Request (host %s, path %s, body %s), Response: %s",
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code_, content_, request_.host, request_.path, inspect(request_.body), inspect(response_));
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else
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module:log("warn", "URL Callback non successful: Code %s, Content %s, Request (%s), Response: %s",
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code_, content_, inspect(request_), inspect(response_));
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end
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end
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local function sendEvent(type,room_address,participant,requestId,replyIq,replyError)
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local event_ts = round(socket.gettime()*1000);
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local node, host, resource, target_subdomain = room_jid_split_subdomain(room_address);
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local room_param = '';
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if target_subdomain then
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room_param = target_subdomain..'/'..node;
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else
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room_param = node;
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end
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local out_event = {
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["conference"] = room_address,
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["roomParam"] = room_param,
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["eventType"] = type,
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["participant"] = participant,
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["externalApiUrl"] = external_api_url.."/jibriqueue/update",
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["requestId"] = requestId,
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["region"] = JibriRegion,
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}
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module:log("debug","Sending event %s",inspect(out_event));
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local headers = http_headers or {}
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headers['Authorization'] = generateToken()
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module:log("debug","Sending headers %s",inspect(headers));
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local requestURL = queueServiceURL.."/job/recording"
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if type=="LeaveQueue" then
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requestURL = requestURL .."/cancel"
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end
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local request = http.request(requestURL, {
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headers = headers,
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method = "POST",
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body = json.encode(out_event)
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}, function (content_, code_, response_, request_)
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if code_ == 200 or code_ == 204 then
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module:log("debug", "URL Callback: Code %s, Content %s, Request (host %s, path %s, body %s), Response: %s",
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code_, content_, request_.host, request_.path, inspect(request_.body), inspect(response_));
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module:log("info", "sending reply IQ %s",inspect(replyIq));
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module:send(replyIq);
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else
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module:log("warn", "URL Callback non successful: Code %s, Content %s, Request (%s), Response: %s",
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code_, content_, inspect(request_), inspect(response_));
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module:log("warn", "sending reply error IQ %s",inspect(replyError));
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module:send(replyError);
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end
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end);
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end
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-- receives iq from client currently connected to the room
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function on_iq(event)
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local requestId;
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-- Check the type of the incoming stanza to avoid loops:
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if event.stanza.attr.type == "error" then
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return; -- We do not want to reply to these, so leave.
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end
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if event.stanza.attr.to == module:get_host() then
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if event.stanza.attr.type == "set" then
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log("info", "Jibri Queue Messsage Event found: %s ",inspect(event.stanza));
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local reply = st.reply(event.stanza);
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local replyError = st.error_reply(event.stanza,'cancel','internal-server-error',"Queue Server Error");
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module:log("info","Reply stanza %s",inspect(reply));
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local jibriQueue
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= event.stanza:get_child('jibri-queue', 'http://jitsi.org/protocol/jibri-queue');
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if jibriQueue then
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module:log("info", "Jibri Queue Request: %s ",inspect(jibriQueue));
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local roomAddress = jibriQueue.attr.room;
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local room = get_room_from_jid(room_jid_match_rewrite(roomAddress));
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if not room then
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module:log("warn", "No room found %s", roomAddress);
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return false;
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end
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local from = event.stanza.attr.from;
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local occupant = room:get_occupant_by_real_jid(from);
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if not occupant then
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module:log("warn", "No occupant %s found for %s", from, roomAddress);
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return false;
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end
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local action = jibriQueue.attr.action;
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if action == 'join' then
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-- join action, so send event out
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requestId = uuid_gen();
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-- now handle new jibri queue message
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room.jibriQueue[occupant.jid] = requestId;
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reply:add_child(st.stanza("jibri-queue", { xmlns = 'http://jitsi.org/protocol/jibri-queue', requestId = requestId})):up()
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replyError:add_child(st.stanza("jibri-queue", { xmlns = 'http://jitsi.org/protocol/jibri-queue', requestId = requestId})):up()
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module:log("info","Sending JoinQueue event for jid %s occupant %s reply %s",roomAddress,occupant.jid,inspect(reply));
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sendEvent('JoinQueue',roomAddress,occupant.jid,requestId,reply,replyError);
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end
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if action == 'leave' then
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requestId = jibriQueue.attr.requestId;
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-- TODO: check that requestId is the same as cached value
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room.jibriQueue[occupant.jid] = nil;
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reply:add_child(st.stanza("jibri-queue", { xmlns = 'http://jitsi.org/protocol/jibri-queue', requestId = requestId})):up()
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replyError:add_child(st.stanza("jibri-queue", { xmlns = 'http://jitsi.org/protocol/jibri-queue', requestId = requestId})):up()
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sendEvent('LeaveQueue',roomAddress,occupant.jid,requestId,reply,replyError);
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end
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else
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module:log("warn","Jibri Queue Stanza missing child %s",inspect(event.stanza))
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end
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end
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end
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return true
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end
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-- create recorder queue cache for the room
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function room_created(event)
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local room = event.room;
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if is_healthcheck_room(room.jid) then
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return;
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end
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room.jibriQueue = {};
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end
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-- Conference ended, clear all queue cache jids
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function room_destroyed(event)
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local room = event.room;
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if is_healthcheck_room(room.jid) then
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return;
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end
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for jid, x in pairs(room.jibriQueue) do
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if x then
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sendEvent('LeaveQueue',internal_room_jid_match_rewrite(room.jid),jid,x);
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end
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end
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end
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-- Occupant left remove it from the queue if it joined the queue
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function occupant_leaving(event)
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local room = event.room;
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if is_healthcheck_room(room.jid) then
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return;
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end
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local occupant = event.occupant;
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local requestId = room.jibriQueue[occupant.jid];
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-- check if user has cached queue request
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if requestId then
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-- remove occupant from queue cache, signal backend
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room.jibriQueue[occupant.jid] = nil;
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sendEvent('LeaveQueue',internal_room_jid_match_rewrite(room.jid),occupant.jid,requestId);
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end
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end
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module:hook("iq/host", on_iq);
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-- executed on every host added internally in prosody, including components
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function process_host(host)
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if host == muc_component_host then -- the conference muc component
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module:log("info","Hook to muc events on %s", host);
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local muc_module = module:context(host);
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muc_module:hook("muc-room-created", room_created, -1);
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-- muc_module:hook("muc-occupant-joined", occupant_joined, -1);
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muc_module:hook("muc-occupant-pre-leave", occupant_leaving, -1);
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muc_module:hook("muc-room-destroyed", room_destroyed, -1);
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end
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end
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if prosody.hosts[muc_component_host] == nil then
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module:log("info","No muc component found, will listen for it: %s", muc_component_host)
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-- when a host or component is added
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prosody.events.add_handler("host-activated", process_host);
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else
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process_host(muc_component_host);
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end
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module:log("info", "Loading jibri_queue_component");
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--- Verifies room name, domain name with the values in the token
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-- @param token the token we received
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-- @param room_name the room name
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-- @param group name of the group (optional)
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-- @param session the session to use for storing token specific fields
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-- @return true if values are ok or false otherwise
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function verify_token(token, room_name, session)
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if disableTokenVerification then
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return true;
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end
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-- if not disableTokenVerification and we do not have token
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-- stop here, cause the main virtual host can have guest access enabled
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-- (allowEmptyToken = true) and we will allow access to rooms info without
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-- a token
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if token == nil then
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log("warn", "no token provided");
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return false;
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end
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session.auth_token = token;
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local verified, reason = token_util:process_and_verify_token(session);
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if not verified then
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log("warn", "not a valid token %s", tostring(reason));
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return false;
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end
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local room_address = jid.join(room_name, module:get_host());
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-- if there is a group we are in multidomain mode and that group is not
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-- our parent host
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if group and group ~= "" and group ~= parentHostName then
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room_address = "["..group.."]"..room_address;
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end
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if not token_util:verify_room(session, room_address) then
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log("warn", "Token %s not allowed to join: %s",
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tostring(token), tostring(room_address));
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return false;
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end
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return true;
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end
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--- Handles request for updating jibri queue status
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-- @param event the http event, holds the request query
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-- @return GET response, containing a json with response details
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function handle_update_jibri_queue(event)
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module:log("info","Update Jibri Queue Event Received");
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-- if (not event.request.url.query) then
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-- return { status_code = 400; };
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-- end
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local body = json.decode(event.request.body);
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-- local params = parse(event.request.url.query);
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module:log("info","Update Jibri Event Body %s",inspect(body));
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-- local token = params["token"];
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local token
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if not token then
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token = event.request.headers["authorization"];
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if not token then
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token = ''
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else
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local prefixStart, prefixEnd = token:find("Bearer ");
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if prefixStart ~= 1 then
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module:log("error", "Invalid authorization header format. The header must start with the string 'Bearer '");
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return 403
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end
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token = token:sub(prefixEnd + 1);
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end
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end
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local user_jid = body["participant"];
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local roomAddress = body["conference"];
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local userJWT = body["token"];
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local action = body["action"];
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local time = body["time"];
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local position = body["position"];
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local requestId = body["requestId"];
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if not verify_token(token, roomAddress, {}) then
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return { status_code = 403; };
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end
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local room = get_room_from_jid(room_jid_match_rewrite(roomAddress));
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if (not room) then
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log("error", "no room found %s", roomAddress);
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return { status_code = 404; };
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end
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local occupant = room:get_occupant_by_real_jid(user_jid);
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if not occupant then
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log("warn", "No occupant %s found for %s", user_jid, roomAddress);
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return { status_code = 404; };
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end
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if not room.jibriQueue[occupant.jid] then
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log("warn", "No queue request found for occupant %s in conference %s",occupant.jid,room.jid)
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return { status_code = 404; };
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end
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if not action then
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if userJWT then
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action = 'token';
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else
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action = 'info';
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end
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end
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if not requestId then
|
|
requestId = room.jibriQueue[occupant.jid];
|
|
end
|
|
|
|
-- TODO: actually implement udpate code here
|
|
sendIq(occupant.jid,action,requestId,time,position,userJWT);
|
|
return { status_code = 200; };
|
|
end
|
|
|
|
module:depends("http");
|
|
module:provides("http", {
|
|
default_path = "/";
|
|
name = "jibriqueue";
|
|
route = {
|
|
["POST /jibriqueue/update"] = function (event) return async_handler_wrapper(event,handle_update_jibri_queue) end;
|
|
};
|
|
});
|