mirror of
https://github.com/jech/galene.git
synced 2024-12-22 15:25:48 +01:00
Split out the javascript protocol interface.
This commit is contained in:
Juliusz Chroboczek
parent
ec742eacdb
commit
3e0bb08955
4 changed files with 1090 additions and 613 deletions
918
static/protocol.js
Normal file
918
static/protocol.js
Normal file
|
|
@ -0,0 +1,918 @@
|
|||
// Copyright (c) 2020 by Juliusz Chroboczek.
|
||||
|
||||
// This is not open source software. Copy it, and I'll break into your
|
||||
// house and tell your three year-old that Santa doesn't exist.
|
||||
|
||||
'use strict';
|
||||
|
||||
/**
|
||||
* toHex formats an array as a hexadecimal string.
|
||||
* @returns {string}
|
||||
*/
|
||||
function toHex(array) {
|
||||
let a = new Uint8Array(array);
|
||||
function hex(x) {
|
||||
let h = x.toString(16);
|
||||
if(h.length < 2)
|
||||
h = '0' + h;
|
||||
return h;
|
||||
}
|
||||
return a.reduce((x, y) => x + hex(y), '');
|
||||
}
|
||||
|
||||
/** randomid returns a random string of 32 hex digits (16 bytes).
|
||||
* @returns {string}
|
||||
*/
|
||||
function randomid() {
|
||||
let a = new Uint8Array(16);
|
||||
crypto.getRandomValues(a);
|
||||
return toHex(a);
|
||||
}
|
||||
|
||||
/**
|
||||
* ServerConnection encapsulates a websocket connection to the server and
|
||||
* all the associated streams.
|
||||
* @constructor
|
||||
*/
|
||||
function ServerConnection() {
|
||||
/**
|
||||
* The id of this connection.
|
||||
* @type {string}
|
||||
*/
|
||||
this.id = randomid();
|
||||
/**
|
||||
* The group that we have joined, or nil if we haven't joined yet.
|
||||
* @type {string}
|
||||
*/
|
||||
this.group = null;
|
||||
/**
|
||||
* The underlying websocket.
|
||||
* @type {WebSocket}
|
||||
*/
|
||||
this.socket = null;
|
||||
/**
|
||||
* The set of all up streams, indexed by their id.
|
||||
* @type {Object.<string,Stream>}
|
||||
*/
|
||||
this.up = {};
|
||||
/**
|
||||
* The set of all down streams, indexed by their id.
|
||||
* @type {Object.<string,Stream>}
|
||||
*/
|
||||
this.down = {};
|
||||
/**
|
||||
* The ICE configuration used by all associated streams.
|
||||
* @type {Array.<Object>}
|
||||
*/
|
||||
this.iceServers = [];
|
||||
/**
|
||||
* The permissions granted to this connection.
|
||||
* @type {Object.<string,boolean>}
|
||||
*/
|
||||
this.permissions = {};
|
||||
|
||||
/* Callbacks */
|
||||
|
||||
/**
|
||||
* onconnected is called when the connection has been established
|
||||
* @type{function(): any}
|
||||
*/
|
||||
this.onconnected = null;
|
||||
/**
|
||||
* onclose is called when the connection is closed
|
||||
* @type{function(number, string): any}
|
||||
*/
|
||||
this.onclose = null;
|
||||
/**
|
||||
* onuser is called whenever a user is added or removed from the group
|
||||
* @type{function(string, string, string): any}
|
||||
*/
|
||||
this.onuser = null;
|
||||
/**
|
||||
* onpermissions is called whenever the current user's permissions change
|
||||
* @type{function(Object.<string,boolean>): any}
|
||||
*/
|
||||
this.onpermissions = null;
|
||||
/**
|
||||
* ondownstream is called whenever a new down stream is added. It
|
||||
* should set up the stream's callbacks; actually setting up the UI
|
||||
* should be done in the stream's ondowntrack callback.
|
||||
* @type{function(Stream): any}
|
||||
*/
|
||||
this.ondownstream = null;
|
||||
/**
|
||||
* onchat is called whenever a new chat message is received.
|
||||
* @type {function(string, string, string, string): any}
|
||||
*/
|
||||
this.onchat = null;
|
||||
/**
|
||||
* onclearchat is called whenever the server requests that the chat
|
||||
* be cleared.
|
||||
* @type{function(): any}
|
||||
*/
|
||||
this.onclearchat = null;
|
||||
/**
|
||||
* onusermessage is called when the server sends an error or warning
|
||||
* message that should be displayed to the user.
|
||||
* @type{function(string, string): any}
|
||||
*/
|
||||
this.onusermessage = null;
|
||||
}
|
||||
|
||||
/**
|
||||
* @typedef {Object} message
|
||||
* @property {string} type
|
||||
* @property {string} [kind]
|
||||
* @property {string} [id]
|
||||
* @property {string} [username]
|
||||
* @property {string} [password]
|
||||
* @property {Object.<string,boolean>} [permissions]
|
||||
* @property {string} [group]
|
||||
* @property {string} [value]
|
||||
* @property {RTCSessionDescriptionInit} [offer]
|
||||
* @property {RTCSessionDescriptionInit} [answer]
|
||||
* @property {RTCIceCandidate} [candidate]
|
||||
* @property {Object.<string,string>} [labels]
|
||||
* @property {Object.<string,(boolean|number)>} [request]
|
||||
*/
|
||||
|
||||
/**
|
||||
* close forcibly closes a server connection. The onclose callback will
|
||||
* be called when the connection is effectively closed.
|
||||
*/
|
||||
ServerConnection.prototype.close = function() {
|
||||
this.socket && this.socket.close(1000, 'Close requested by client');
|
||||
this.socket = null;
|
||||
}
|
||||
|
||||
/**
|
||||
* send sends a message to the server.
|
||||
* @param {message} m - the message to send.
|
||||
*/
|
||||
ServerConnection.prototype.send = function(m) {
|
||||
if(this.socket.readyState !== this.socket.OPEN) {
|
||||
// send on a closed connection doesn't throw
|
||||
throw(new Error('Connection is not open'));
|
||||
}
|
||||
return this.socket.send(JSON.stringify(m));
|
||||
}
|
||||
|
||||
/** getIceServers fetches an ICE configuration from the server and
|
||||
* populates the iceServers field of a ServerConnection. It is called
|
||||
* lazily by connect.
|
||||
*
|
||||
* @returns {Promise<Array.<Object>>}
|
||||
*/
|
||||
ServerConnection.prototype.getIceServers = async function() {
|
||||
let r = await fetch('/ice-servers.json');
|
||||
if(!r.ok)
|
||||
throw new Error("Couldn't fetch ICE servers: " +
|
||||
r.status + ' ' + r.statusText);
|
||||
let servers = await r.json();
|
||||
if(!(servers instanceof Array))
|
||||
throw new Error("couldn't parse ICE servers");
|
||||
this.iceServers = servers;
|
||||
return servers;
|
||||
}
|
||||
|
||||
/**
|
||||
* Connect connects to the server.
|
||||
*
|
||||
* @param {string} url - The URL to connect to.
|
||||
* @returns {Promise<ServerConnection>}
|
||||
*/
|
||||
ServerConnection.prototype.connect = function(url) {
|
||||
let sc = this;
|
||||
if(sc.socket) {
|
||||
sc.socket.close(1000, 'Reconnecting');
|
||||
sc.socket = null;
|
||||
}
|
||||
|
||||
if(!sc.iceServers) {
|
||||
try {
|
||||
sc.getIceServers();
|
||||
} catch(e) {
|
||||
console.error(e);
|
||||
}
|
||||
}
|
||||
|
||||
try {
|
||||
sc.socket = new WebSocket(
|
||||
`ws${location.protocol === 'https:' ? 's' : ''}://${location.host}/ws`,
|
||||
);
|
||||
} catch(e) {
|
||||
return Promise.reject(e);
|
||||
}
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
this.socket.onerror = function(e) {
|
||||
reject(e);
|
||||
};
|
||||
this.socket.onopen = function(e) {
|
||||
if(sc.onconnected)
|
||||
sc.onconnected.call(sc);
|
||||
resolve(sc);
|
||||
};
|
||||
this.socket.onclose = function(e) {
|
||||
sc.permissions = {};
|
||||
if(sc.onpermissions)
|
||||
sc.onpermissions.call(sc, {});
|
||||
for(let id in sc.down) {
|
||||
let c = sc.down[id];
|
||||
delete(sc.down[id]);
|
||||
c.close(false);
|
||||
if(c.onclose)
|
||||
c.onclose.call(c);
|
||||
}
|
||||
if(sc.onclose)
|
||||
sc.onclose.call(sc, e.code, e.reason);
|
||||
reject(new Error('websocket close ' + e.code + ' ' + e.reason));
|
||||
};
|
||||
this.socket.onmessage = function(e) {
|
||||
let m = JSON.parse(e.data);
|
||||
switch(m.type) {
|
||||
case 'offer':
|
||||
sc.gotOffer(m.id, m.labels, m.offer, m.kind === 'renegotiate');
|
||||
break;
|
||||
case 'answer':
|
||||
sc.gotAnswer(m.id, m.answer);
|
||||
break;
|
||||
case 'renegotiate':
|
||||
sc.gotRenegotiate(m.id)
|
||||
break;
|
||||
case 'close':
|
||||
sc.gotClose(m.id);
|
||||
break;
|
||||
case 'abort':
|
||||
sc.gotAbort(m.id);
|
||||
break;
|
||||
case 'ice':
|
||||
sc.gotICE(m.id, m.candidate);
|
||||
break;
|
||||
case 'label':
|
||||
sc.gotLabel(m.id, m.value);
|
||||
break;
|
||||
case 'permissions':
|
||||
sc.permissions = m.permissions;
|
||||
if(sc.onpermissions)
|
||||
sc.onpermissions.call(sc, m.permissions);
|
||||
break;
|
||||
case 'user':
|
||||
if(sc.onuser)
|
||||
sc.onuser.call(sc, m.id, m.kind, m.username);
|
||||
break;
|
||||
case 'chat':
|
||||
if(sc.onchat)
|
||||
sc.onchat.call(sc, m.id, m.username, m.kind, m.value);
|
||||
break;
|
||||
case 'clearchat':
|
||||
if(sc.onclearchat)
|
||||
sc.onclearchat.call(sc);
|
||||
break;
|
||||
case 'ping':
|
||||
sc.send({
|
||||
type: 'pong',
|
||||
});
|
||||
break;
|
||||
case 'pong':
|
||||
/* nothing */
|
||||
break;
|
||||
case 'usermessage':
|
||||
if(sc.onusermessage)
|
||||
sc.onusermessage.call(sc, m.kind, m.value)
|
||||
break;
|
||||
default:
|
||||
console.warn('Unexpected server message', m.type);
|
||||
return;
|
||||
}
|
||||
};
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* login authenticates with the server.
|
||||
*
|
||||
* @param {string} username
|
||||
* @param {string} password
|
||||
*/
|
||||
ServerConnection.prototype.login = function(username, password) {
|
||||
this.send({
|
||||
type: 'login',
|
||||
id: this.id,
|
||||
username: username,
|
||||
password: password,
|
||||
})
|
||||
}
|
||||
|
||||
/**
|
||||
* join joins a group.
|
||||
*
|
||||
* @param {string} group - The name of the group to join.
|
||||
*/
|
||||
ServerConnection.prototype.join = function(group) {
|
||||
this.send({
|
||||
type: 'join',
|
||||
group: group,
|
||||
})
|
||||
}
|
||||
|
||||
/**
|
||||
* request sets the list of requested media types.
|
||||
*
|
||||
* @param {string} what - One of "audio", "screenshare" or "everything".
|
||||
*/
|
||||
ServerConnection.prototype.request = function(what) {
|
||||
/** @type {Object.<string,boolean>} */
|
||||
let request = {};
|
||||
switch(what) {
|
||||
case 'audio':
|
||||
request = {audio: true};
|
||||
break;
|
||||
case 'screenshare':
|
||||
request = {audio: true, screenshare: true};
|
||||
break;
|
||||
case 'everything':
|
||||
request = {audio: true, screenshare: true, video: true};
|
||||
break;
|
||||
default:
|
||||
console.error(`Uknown value ${what} in sendRequest`);
|
||||
break;
|
||||
}
|
||||
|
||||
this.send({
|
||||
type: 'request',
|
||||
request: request,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* newUpStream requests the creation of a new up stream.
|
||||
*
|
||||
* @param {string} id - The id of the stream to create (optional).
|
||||
* @returns {Stream}
|
||||
*/
|
||||
ServerConnection.prototype.newUpStream = function(id) {
|
||||
let sc = this;
|
||||
if(!id) {
|
||||
id = randomid();
|
||||
if(sc.up[id])
|
||||
throw new Error('Eek!');
|
||||
}
|
||||
let pc = new RTCPeerConnection({
|
||||
iceServers: sc.iceServers,
|
||||
});
|
||||
if(!pc)
|
||||
throw new Error("Couldn't create peer connection");
|
||||
if(sc.up[id]) {
|
||||
sc.up[id].close(false);
|
||||
}
|
||||
let c = new Stream(this, id, pc);
|
||||
sc.up[id] = c;
|
||||
|
||||
pc.onnegotiationneeded = async e => {
|
||||
await c.negotiate();
|
||||
}
|
||||
|
||||
pc.onicecandidate = e => {
|
||||
if(!e.candidate)
|
||||
return;
|
||||
sc.send({type: 'ice',
|
||||
id: id,
|
||||
candidate: e.candidate,
|
||||
});
|
||||
};
|
||||
|
||||
pc.oniceconnectionstatechange = e => {
|
||||
if(c.onstatus)
|
||||
c.onstatus.call(c, pc.iceConnectionState);
|
||||
if(pc.iceConnectionState === 'failed') {
|
||||
try {
|
||||
/** @ts-ignore */
|
||||
pc.restartIce();
|
||||
} catch(e) {
|
||||
console.warn(e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pc.ontrack = console.error;
|
||||
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* chat sends a chat message to the server. The server will normally echo
|
||||
* the message back to the client.
|
||||
*
|
||||
* @param {string} username - The username of the sending user.
|
||||
* @param {string} kind - The kind of message, either "" or "me".
|
||||
* @param {string} message - The text of the message.
|
||||
*/
|
||||
ServerConnection.prototype.chat = function(username, kind, message) {
|
||||
this.send({
|
||||
type: 'chat',
|
||||
id: this.id,
|
||||
username: username,
|
||||
kind: kind,
|
||||
value: message,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* groupAction sends a request to act on the current group.
|
||||
*
|
||||
* @param {string} kind - One of "clearchat", "lock", "unlock", "record or
|
||||
* "unrecord".
|
||||
*/
|
||||
ServerConnection.prototype.groupAction = function(kind) {
|
||||
this.send({
|
||||
type: 'groupaction',
|
||||
kind: kind,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* userAction sends a request to act on a user.
|
||||
*
|
||||
* @param {string} kind - One of "op", "unop", "kick", "present", "unpresent".
|
||||
*/
|
||||
ServerConnection.prototype.userAction = function(kind, id) {
|
||||
this.send({
|
||||
type: 'useraction',
|
||||
kind: kind,
|
||||
id: id,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive an offer from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
* @param labels
|
||||
* @param {RTCSessionDescriptionInit} offer
|
||||
* @param {boolean} renegotiate
|
||||
*/
|
||||
ServerConnection.prototype.gotOffer = async function(id, labels, offer, renegotiate) {
|
||||
let sc = this;
|
||||
let c = sc.down[id];
|
||||
if(c && !renegotiate) {
|
||||
// SDP is rather inflexible as to what can be renegotiated.
|
||||
// Unless the server indicates that this is a renegotiation with
|
||||
// all parameters unchanged, tear down the existing connection.
|
||||
delete(sc.down[id])
|
||||
c.close(false);
|
||||
c = null;
|
||||
}
|
||||
|
||||
if(!c) {
|
||||
let pc = new RTCPeerConnection({
|
||||
iceServers: this.iceServers,
|
||||
});
|
||||
c = new Stream(this, id, pc);
|
||||
sc.down[id] = c;
|
||||
|
||||
c.pc.onicecandidate = function(e) {
|
||||
if(!e.candidate)
|
||||
return;
|
||||
sc.send({type: 'ice',
|
||||
id: id,
|
||||
candidate: e.candidate,
|
||||
});
|
||||
};
|
||||
|
||||
pc.oniceconnectionstatechange = e => {
|
||||
if(c.onstatus)
|
||||
c.onstatus.call(c, pc.iceConnectionState);
|
||||
if(pc.iceConnectionState === 'failed') {
|
||||
sc.send({type: 'renegotiate',
|
||||
id: id,
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
c.pc.ontrack = function(e) {
|
||||
let label = e.transceiver && c.labelsByMid[e.transceiver.mid];
|
||||
if(label) {
|
||||
c.labels[e.track.id] = label;
|
||||
} else {
|
||||
console.warn("Couldn't find label for track");
|
||||
}
|
||||
if(c.stream !== e.streams[0]) {
|
||||
c.stream = e.streams[0];
|
||||
let label =
|
||||
e.transceiver && c.labelsByMid[e.transceiver.mid];
|
||||
c.labels[e.track.id] = label;
|
||||
if(c.ondowntrack) {
|
||||
c.ondowntrack.call(
|
||||
c, e.track, e.transceiver, label, e.streams[0],
|
||||
);
|
||||
}
|
||||
if(c.onlabel) {
|
||||
c.onlabel.call(c, label);
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
c.labelsByMid = labels;
|
||||
|
||||
if(sc.ondownstream)
|
||||
sc.ondownstream.call(sc, c);
|
||||
|
||||
await c.pc.setRemoteDescription(offer);
|
||||
await c.flushIceCandidates();
|
||||
let answer = await c.pc.createAnswer();
|
||||
if(!answer)
|
||||
throw new Error("Didn't create answer");
|
||||
await c.pc.setLocalDescription(answer);
|
||||
this.send({
|
||||
type: 'answer',
|
||||
id: id,
|
||||
answer: answer,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive a stream label from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
* @param {string} label
|
||||
*/
|
||||
ServerConnection.prototype.gotLabel = function(id, label) {
|
||||
let c = this.down[id];
|
||||
if(!c)
|
||||
throw new Error('Got label for unknown id');
|
||||
|
||||
c.label = label;
|
||||
if(c.onlabel)
|
||||
c.onlabel.call(c, label);
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive an answer from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
* @param {RTCSessionDescriptionInit} answer
|
||||
*/
|
||||
ServerConnection.prototype.gotAnswer = async function(id, answer) {
|
||||
let c = this.up[id];
|
||||
if(!c)
|
||||
throw new Error('unknown up stream');
|
||||
try {
|
||||
await c.pc.setRemoteDescription(answer);
|
||||
} catch(e) {
|
||||
if(c.onerror)
|
||||
c.onerror.call(c, e);
|
||||
return;
|
||||
}
|
||||
await c.flushIceCandidates();
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive a renegotiation request from the server. Don't
|
||||
* call this.
|
||||
*
|
||||
* @param {string} id
|
||||
*/
|
||||
ServerConnection.prototype.gotRenegotiate = async function(id) {
|
||||
let c = this.up[id];
|
||||
if(!c)
|
||||
throw new Error('unknown up stream');
|
||||
try {
|
||||
/** @ts-ignore */
|
||||
c.pc.restartIce();
|
||||
} catch(e) {
|
||||
console.warn(e);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive a close request from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
*/
|
||||
ServerConnection.prototype.gotClose = function(id) {
|
||||
let c = this.down[id];
|
||||
if(!c)
|
||||
throw new Error('unknown down stream');
|
||||
delete(this.down[id]);
|
||||
c.close(false);
|
||||
if(c.onclose)
|
||||
c.onclose.call(c);
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive an abort message from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
*/
|
||||
ServerConnection.prototype.gotAbort = function(id) {
|
||||
let c = this.down[id];
|
||||
if(!c)
|
||||
throw new Error('unknown up stream');
|
||||
if(c.onabort)
|
||||
c.onabort.call(c);
|
||||
}
|
||||
|
||||
/**
|
||||
* Called when we receive an ICE candidate from the server. Don't call this.
|
||||
*
|
||||
* @param {string} id
|
||||
* @param {RTCIceCandidate} candidate
|
||||
*/
|
||||
ServerConnection.prototype.gotICE = async function(id, candidate) {
|
||||
let c = this.up[id];
|
||||
if(!c)
|
||||
c = this.down[id];
|
||||
if(!c)
|
||||
throw new Error('unknown stream');
|
||||
if(c.pc.remoteDescription)
|
||||
await c.pc.addIceCandidate(candidate).catch(console.warn);
|
||||
else
|
||||
c.iceCandidates.push(candidate);
|
||||
}
|
||||
|
||||
/**
|
||||
* Stream encapsulates a MediaStream, a set of tracks.
|
||||
*
|
||||
* A stream is said to go "up" if it is from the client to the server, and
|
||||
* "down" otherwise.
|
||||
*
|
||||
* @param {ServerConnection} sc
|
||||
* @param {string} id
|
||||
* @param {RTCPeerConnection} pc
|
||||
*
|
||||
* @constructor
|
||||
*/
|
||||
function Stream(sc, id, pc) {
|
||||
/**
|
||||
* The associated ServerConnection.
|
||||
*
|
||||
* @type {ServerConnection}
|
||||
*/
|
||||
this.sc = sc;
|
||||
/**
|
||||
* The id of this stream.
|
||||
*
|
||||
* @type {string}
|
||||
*/
|
||||
this.id = id;
|
||||
/**
|
||||
* For up streams, one of "local" or "screenshare".
|
||||
*
|
||||
* @type {string}
|
||||
*/
|
||||
this.kind = null;
|
||||
/**
|
||||
* For down streams, a user-readable label.
|
||||
*
|
||||
* @type {string}
|
||||
*/
|
||||
this.label = null;
|
||||
/**
|
||||
* The associated RTCPeerConnectoin. This is null before the stream
|
||||
* is connected, and may change over time.
|
||||
*
|
||||
* @type {RTCPeerConnection}
|
||||
*/
|
||||
this.pc = pc;
|
||||
/**
|
||||
* The associated MediaStream. This is null before the stream is
|
||||
* connected, and may change over time.
|
||||
*
|
||||
* @type {MediaStream}
|
||||
*/
|
||||
this.stream = null;
|
||||
/**
|
||||
* Track labels, indexed by track id.
|
||||
*
|
||||
* @type {Object.<string,string>}
|
||||
*/
|
||||
this.labels = {};
|
||||
/**
|
||||
* Track labels, indexed by mid.
|
||||
*
|
||||
* @type {Object.<string,string>}
|
||||
*/
|
||||
this.labelsByMid = {};
|
||||
/**
|
||||
* Buffered ICE candidates. This will be flushed by flushIceCandidates
|
||||
* when the PC becomes stable.
|
||||
*
|
||||
* @type {Array.<RTCIceCandidate>}
|
||||
*/
|
||||
this.iceCandidates = [];
|
||||
/**
|
||||
* The statistics last computed by the stats handler. This is
|
||||
* a dictionary indexed by track id, with each value a disctionary of
|
||||
* statistics.
|
||||
*
|
||||
* @type {Object.<string,any>}
|
||||
*/
|
||||
this.stats = {};
|
||||
/**
|
||||
* The id of the periodic handler that computes statistics, as
|
||||
* returned by setInterval.
|
||||
*
|
||||
* @type {number}
|
||||
*/
|
||||
this.statsHandler = null;
|
||||
|
||||
/* Callbacks */
|
||||
|
||||
/**
|
||||
* onclose is called when the stream is closed.
|
||||
*
|
||||
* @type{function(): any}
|
||||
*/
|
||||
this.onclose = null;
|
||||
/**
|
||||
* onerror is called whenever an error occurs. If the error is
|
||||
* fatal, then onclose will be called afterwards.
|
||||
*
|
||||
* @type{function(any): any}
|
||||
*/
|
||||
this.onerror = null;
|
||||
/**
|
||||
* ondowntrack is called whenever a new track is added to a stream.
|
||||
* If the stream parameter differs from its previous value, then it
|
||||
* indicates that the old stream has been discarded.
|
||||
*
|
||||
* @type{function(MediaStreamTrack, RTCRtpTransceiver, string, MediaStream): any}
|
||||
*/
|
||||
this.ondowntrack = null;
|
||||
/**
|
||||
* onlabel is called whenever the server sets a new label for the stream.
|
||||
*
|
||||
* @type{function(string): any}
|
||||
*/
|
||||
this.onlabel = null;
|
||||
/**
|
||||
* onstatus is called whenever the status of the stream changes.
|
||||
*
|
||||
* @type{function(string): any}
|
||||
*/
|
||||
this.onstatus = null;
|
||||
/**
|
||||
* onabort is called when the server requested that an up stream be
|
||||
* closed. It is the resposibility of the client to close the stream.
|
||||
*
|
||||
* @type{function(): any}
|
||||
*/
|
||||
this.onabort = null;
|
||||
/**
|
||||
* onstats is called when we have new statistics about the connection
|
||||
*
|
||||
* @type{function(Object.<string,any>): any}
|
||||
*/
|
||||
this.onstats = null;
|
||||
}
|
||||
|
||||
/**
|
||||
* close closes an up stream. It should not be called for down streams.
|
||||
* @param {boolean} sendclose - whether to send a close message to the server
|
||||
*/
|
||||
Stream.prototype.close = function(sendclose) {
|
||||
let c = this;
|
||||
if(c.statsHandler) {
|
||||
clearInterval(c.statsHandler);
|
||||
c.statsHandler = null;
|
||||
}
|
||||
|
||||
if(c.stream) {
|
||||
c.stream.getTracks().forEach(t => {
|
||||
try {
|
||||
t.stop();
|
||||
} catch(e) {
|
||||
}
|
||||
});
|
||||
}
|
||||
c.pc.close();
|
||||
|
||||
if(sendclose) {
|
||||
try {
|
||||
c.sc.send({
|
||||
type: 'close',
|
||||
id: c.id,
|
||||
});
|
||||
} catch(e) {
|
||||
}
|
||||
}
|
||||
c.sc = null;
|
||||
};
|
||||
|
||||
/**
|
||||
* flushIceCandidates flushes any buffered ICE candidates. It is called
|
||||
* automatically when the connection reaches a stable state.
|
||||
*/
|
||||
Stream.prototype.flushIceCandidates = async function () {
|
||||
let promises = [];
|
||||
this.iceCandidates.forEach(c => {
|
||||
promises.push(this.pc.addIceCandidate(c).catch(console.warn));
|
||||
});
|
||||
this.iceCandidates = [];
|
||||
return await Promise.all(promises);
|
||||
}
|
||||
|
||||
/**
|
||||
* negotiate negotiates or renegotiates an up stream. It is called
|
||||
* automatically when required. If the client requires renegotiation, it
|
||||
* is probably more effective to call restartIce on the underlying PC
|
||||
* rather than invoking this function directly.
|
||||
*/
|
||||
Stream.prototype.negotiate = async function () {
|
||||
let c = this;
|
||||
|
||||
let offer = await c.pc.createOffer();
|
||||
if(!offer)
|
||||
throw(new Error("Didn't create offer"));
|
||||
await c.pc.setLocalDescription(offer);
|
||||
|
||||
// mids are not known until this point
|
||||
c.pc.getTransceivers().forEach(t => {
|
||||
if(t.sender && t.sender.track) {
|
||||
let label = c.labels[t.sender.track.id];
|
||||
if(label)
|
||||
c.labelsByMid[t.mid] = label;
|
||||
else
|
||||
console.warn("Couldn't find label for track");
|
||||
}
|
||||
});
|
||||
|
||||
c.sc.send({
|
||||
type: 'offer',
|
||||
kind: 'renegotiate',
|
||||
id: c.id,
|
||||
labels: c.labelsByMid,
|
||||
offer: offer,
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* updateStats is called periodically, if requested by setStatsInterval,
|
||||
* in order to recompute stream statistics and invoke the onstats handler.
|
||||
*
|
||||
* @returns {Promise<void>}
|
||||
*/
|
||||
Stream.prototype.updateStats = async function() {
|
||||
let c = this;
|
||||
let old = c.stats;
|
||||
let stats = {};
|
||||
|
||||
let transceivers = c.pc.getTransceivers();
|
||||
for(let i = 0; i < transceivers.length; i++) {
|
||||
let t = transceivers[i];
|
||||
let tid = t.sender.track && t.sender.track.id;
|
||||
if(!tid)
|
||||
continue;
|
||||
|
||||
let report;
|
||||
try {
|
||||
report = await t.sender.getStats();
|
||||
} catch(e) {
|
||||
continue;
|
||||
}
|
||||
|
||||
stats[tid] = {};
|
||||
|
||||
for(let r of report.values()) {
|
||||
if(r.type !== 'outbound-rtp')
|
||||
continue;
|
||||
|
||||
stats[tid].timestamp = r.timestamp;
|
||||
stats[tid].bytesSent = r.bytesSent;
|
||||
if(old[tid] && old[tid].timestamp) {
|
||||
stats[tid].rate =
|
||||
((r.bytesSent - old[tid].bytesSent) * 1000 /
|
||||
(r.timestamp - old[tid].timestamp)) * 8;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
c.stats = stats;
|
||||
|
||||
if(c.onstats)
|
||||
c.onstats.call(c, c.stats);
|
||||
}
|
||||
|
||||
/**
|
||||
* setStatsInterval sets the interval in milliseconds at which the onstats
|
||||
* handler will be called. This is only useful for up streams.
|
||||
*
|
||||
* @param {number} ms
|
||||
*/
|
||||
Stream.prototype.setStatsInterval = function(ms) {
|
||||
let c = this;
|
||||
if(c.statsHandler) {
|
||||
clearInterval(c.statsHandler);
|
||||
c.statsHandler = null;
|
||||
}
|
||||
|
||||
if(ms <= 0)
|
||||
return;
|
||||
|
||||
c.statsHandler = setInterval(() => {
|
||||
c.updateStats();
|
||||
}, ms);
|
||||
}
|
||||
|
||||
|
|
@ -76,6 +76,7 @@
|
|||
<div id="peers"></div>
|
||||
</div>
|
||||
|
||||
<script src="/sfu.js" defer></script>
|
||||
<script src="/protocol.js" defer></script>
|
||||
<script src="/sfu.js" defer></script>
|
||||
</body>
|
||||
</html>
|
||||
|
|
|
|||
769
static/sfu.js
769
static/sfu.js
File diff suppressed because it is too large
Load diff
13
static/tsconfig.json
Normal file
13
static/tsconfig.json
Normal file
|
|
@ -0,0 +1,13 @@
|
|||
{
|
||||
"compilerOptions": {
|
||||
"target": "ES6",
|
||||
"allowJs": true,
|
||||
"checkJs": true,
|
||||
"declaration": true,
|
||||
"emitDeclarationOnly": true,
|
||||
"strictBindCallApply": true
|
||||
},
|
||||
"files": [
|
||||
"protocol.js"
|
||||
]
|
||||
}
|
||||
Loading…
Reference in a new issue