mirror of
https://github.com/jambonz/jambonz-feature-server.git
synced 2025-12-20 16:50:39 +00:00
Feature/siprec server (#140)
* initial support for siprec/agent assist * call siprec middleware * logger fix * remove verbs that are not valid in a siprec call session
This commit is contained in:
Dave Horton
248
lib/utils/siprec-utils.js
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248
lib/utils/siprec-utils.js
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@@ -0,0 +1,248 @@
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const xmlParser = require('xml2js').parseString;
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const { v4: uuidv4 } = require('uuid');
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const parseUri = require('drachtio-srf').parseUri;
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const transform = require('sdp-transform');
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const debug = require('debug')('jambonz:feature-server');
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const parseCallData = (prefix, obj) => {
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const ret = {};
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const group = obj[`${prefix}group`];
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if (group) {
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const key = Object.keys(group[0]).find((k) => /:?callData$/.test(k));
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//const o = _.find(group[0], (value, key) => /:?callData$/.test(key));
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if (key) {
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//const callData = o[0];
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const callData = group[0][key];
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for (const key of Object.keys(callData)) {
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if (['fromhdr', 'tohdr', 'callid'].includes(key)) ret[key] = callData[key][0];
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}
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}
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}
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debug('parseCallData', prefix, obj, ret);
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return ret;
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};
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/**
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* parse a SIPREC multiparty body
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* @param {object} opts - options
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* @return {Promise}
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*/
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const parseSiprecPayload = (req, logger) => {
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const opts = {};
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return new Promise((resolve, reject) => {
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let sdp, meta ;
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for (let i = 0; i < req.payload.length; i++) {
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switch (req.payload[i].type) {
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case 'application/sdp':
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sdp = req.payload[i].content ;
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break ;
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case 'application/rs-metadata+xml':
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case 'application/rs-metadata':
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meta = opts.xml = req.payload[i].content ;
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break ;
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default:
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break ;
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}
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}
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if (!sdp || !meta) {
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logger.info({payload: req.payload}, 'invalid SIPREC payload');
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return reject(new Error('expected multipart SIPREC body'));
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}
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xmlParser(meta, (err, result) => {
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if (err) { throw err; }
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opts.recordingData = result ;
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opts.sessionId = uuidv4() ;
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const arr = /^([^]+)(m=[^]+?)(m=[^]+?)$/.exec(sdp) ;
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opts.sdp1 = `${arr[1]}${arr[2]}` ;
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opts.sdp2 = `${arr[1]}${arr[3]}\r\n` ;
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try {
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if (typeof result === 'object' && Object.keys(result).length === 1) {
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const key = Object.keys(result)[0] ;
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const arr = /^(.*:)recording/.exec(key) ;
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const prefix = !arr ? '' : (arr[1]) ;
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const obj = opts.recordingData[`${prefix}recording`];
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// 1. collect participant data
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const participants = {} ;
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obj[`${prefix}participant`].forEach((p) => {
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const partDetails = {} ;
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participants[p.$.participant_id] = partDetails;
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if ((`${prefix}nameID` in p) && Array.isArray(p[`${prefix}nameID`])) {
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partDetails.aor = p[`${prefix}nameID`][0].$.aor;
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if ('name' in p[`${prefix}nameID`][0] && Array.isArray(p[`${prefix}nameID`][0].name)) {
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const name = p[`${prefix}nameID`][0].name[0];
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if (typeof name === 'string') partDetails.name = name ;
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else if (typeof name === 'object') partDetails.name = name._ ;
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}
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}
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});
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// 2. find the associated streams for each participant
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if (`${prefix}participantstreamassoc` in obj) {
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obj[`${prefix}participantstreamassoc`].forEach((ps) => {
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const part = participants[ps.$.participant_id];
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if (part) {
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part.send = ps[`${prefix}send`][0];
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part.recv = ps[`${prefix}recv`][0];
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}
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});
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}
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// 3. Retrieve stream data
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opts.caller = {} ;
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opts.callee = {} ;
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obj[`${prefix}stream`].forEach((s) => {
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const streamId = s.$.stream_id;
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let sender;
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for (const [k, v] of Object.entries(participants)) {
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if (v.send === streamId) {
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sender = k;
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break;
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}
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}
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//const sender = _.find(participants, { 'send': streamId});
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if (!sender) return;
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sender.label = s[`${prefix}label`][0];
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if (-1 !== ['1', 'a_leg', 'inbound'].indexOf(sender.label)) {
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opts.caller.aor = sender.aor ;
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if (sender.name) opts.caller.name = sender.name;
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}
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else {
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opts.callee.aor = sender.aor ;
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if (sender.name) opts.callee.name = sender.name;
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}
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});
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// if we dont have a participantstreamassoc then assume the first participant is the caller
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if (!opts.caller.aor && !opts.callee.aor) {
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let i = 0;
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for (const part in participants) {
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const p = participants[part];
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if (0 === i && p.aor) {
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opts.caller.aor = p.aor;
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opts.caller.name = p.name;
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}
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else if (1 === i && p.aor) {
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opts.callee.aor = p.aor;
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opts.callee.name = p.name;
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}
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i++;
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}
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}
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// now for Sonus (at least) we get the original from, to and call-id headers in a <callData/> element
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// if so, this should take preference
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const callData = parseCallData(prefix, obj);
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if (callData) {
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debug(`callData: ${JSON.stringify(callData)}`);
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opts.originalCallId = callData.callid;
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// caller
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let r1 = /^(.*)(<sip.*)$/.exec(callData.fromhdr);
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if (r1) {
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const arr = /<(.*)>/.exec(r1[2]);
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if (arr) {
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const uri = parseUri(arr[1]);
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const user = uri.user || 'anonymous';
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opts.caller.aor = `sip:${user}@${uri.host}`;
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}
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const dname = r1[1].trim();
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const arr2 = /"(.*)"/.exec(dname);
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if (arr2) opts.caller.name = arr2[1];
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else opts.caller.name = dname;
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}
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// callee
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r1 = /^(.*)(<sip.*)$/.exec(callData.tohdr);
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if (r1) {
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const arr = /<(.*)>/.exec(r1[2]);
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if (arr) {
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const uri = parseUri(arr[1]);
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opts.callee.aor = `sip:${uri.user}@${uri.host}`;
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}
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const dname = r1[1].trim();
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const arr2 = /"(.*)"/.exec(dname);
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if (arr2) opts.callee.name = arr2[1];
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else opts.callee.name = dname;
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}
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debug(`opts.caller from callData: ${JSON.stringify(opts.caller)}`);
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debug(`opts.callee from callData: ${JSON.stringify(opts.callee)}`);
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}
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if (opts.caller.aor && 0 !== opts.caller.aor.indexOf('sip:')) {
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opts.caller.aor = 'sip:' + opts.caller.aor;
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}
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if (opts.callee.aor && 0 !== opts.callee.aor.indexOf('sip:')) {
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opts.callee.aor = 'sip:' + opts.callee.aor;
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}
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if (opts.caller.aor) {
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const uri = parseUri(opts.caller.aor);
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opts.caller.number = uri.user;
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}
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if (opts.callee.aor) {
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const uri = parseUri(opts.callee.aor);
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opts.callee.number = uri.user;
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}
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opts.recordingSessionId = opts.recordingData[`${prefix}recording`][`${prefix}session`][0].$.session_id;
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}
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}
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catch (err) {
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reject(err);
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}
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debug(opts, 'payload parser results');
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resolve(opts) ;
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}) ;
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}) ;
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};
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const createSipRecPayload = (sdp1, sdp2, logger) => {
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const sdpObj = [];
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sdpObj.push(transform.parse(sdp1));
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sdpObj.push(transform.parse(sdp2));
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//const arr1 = /^([^]+)(c=[^]+)t=[^]+(m=[^]+?)(a=[^]+)$/.exec(sdp1) ;
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//const arr2 = /^([^]+)(c=[^]+)t=[^]+(m=[^]+?)(a=[^]+)$/.exec(sdp2) ;
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debug(`sdp1: ${sdp1}`);
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debug(`objSdp[0]: ${JSON.stringify(sdpObj[0])}`);
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debug(`sdp2: ${sdp2}`);
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debug(`objSdp[1]: ${JSON.stringify(sdpObj[1])}`);
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if (!sdpObj[0] || !sdpObj[0].media.length) {
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throw new Error(`Error parsing sdp1 into component parts: ${sdp1}`);
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}
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else if (!sdpObj[1] || !sdpObj[1].media.length) {
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throw new Error(`Error parsing sdp2 into component parts: ${sdp2}`);
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}
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if (!sdpObj[0].media[0].label) sdpObj[0].media[0].label = 1;
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if (!sdpObj[1].media[0].label) sdpObj[1].media[0].label = 2;
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//const aLabel = sdp1.includes('a=label:') ? '' : 'a=label:1\r\n';
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//const bLabel = sdp2.includes('a=label:') ? '' : 'a=label:2\r\n';
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sdpObj[0].media = sdpObj[0].media.concat(sdpObj[1].media);
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const combinedSdp = transform.write(sdpObj[0])
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.replace(/a=sendonly\r\n/g, '')
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.replace(/a=direction:both\r\n/g, '');
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debug(`combined ${combinedSdp}`);
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/*
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const combinedSdp = `${arr1[1]}t=0 0\r\n${arr1[2]}${arr1[3]}${arr1[4]}${aLabel}${arr2[3]}${arr2[4]}${bLabel}`
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.replace(/a=sendonly\r\n/g, '')
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.replace(/a=direction:both\r\n/g, '');
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*/
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return combinedSdp;
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};
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module.exports = { parseSiprecPayload, createSipRecPayload } ;
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