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xpeer

v1.1.0

Published

XPeer is A webRTC based tool for building Muti-Peer-to-Peer Web Application.

Downloads

4

Readme

XPeer · GitHub license npm version PRs Welcome

install & usage

npm

npm i -s xpeer

yarn

yarn add xpeer

signal server

NOTE: to use XPeer, the XSignal is essential to work with, provides signal exchanging services between peers.

TODO

  • [ ] 封装文件发送sendFile(file)和接收emit('file', file),自动编解码,并提供发送进度。
  • [ ] 重复share视频流,peer自身取消分享事件。

项目引入

MDN: RTCPeerConnection

import XPeer, { XPeerInit } from 'xpeer'
const options: XPeerInit = {
    signalServer: string, // 'ws://localhost:8080',
    peerConfig: RTCConfiguration
}
const xPeer = new XPeer(options)

外部<script>引入

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 -->
    <script src="https://raw.githubusercontent.com/vaakian/XPeer/main/bundle/xpeer.bundle.min.js"></script>
    <title>XPeer</title>
</head>

<body>

</body>
<script>
    // 直接使用
    const xPeer = new XPeer({
        signalServer: string, // 'ws://localhost:8080',
        peerConfig: RTCConfiguration
    })
</script>

</html>

METHODS

通过xPeer实例所分享的任何数据,都是广播性质的。 MDN: MediaStreamConstraints


// 加入房间
xPeer.join({roomId, nick}).then(local => {
    xPeer.local === local // true
})
// 退出房间
xPeer.leave()
// 共享摄像头
xPeer.shareUser(constraints: MediaStreamConstraints)
// 共享屏幕
xPeer.shareDisplay(constraints: DisplayMediaStreamConstraints)
// 设置静音
xPeer.setMute(kind: 'audio'| 'video', enabled: boolean)

// 通过dataChannel发送数据
xPeer.send(message: string)
// 通过dataChannel发送二进制数据(类型为ArrayBuffer)
xPeer.sendBinary(binary: ArrayBuffer)

EVENTS


xPeer.on('join', (peer: Peer) => {
    // 有新的peer加入
})
xPeer.on('connect', (peer: Peer) => {
    // 后加入房间,成功连接房间内的其他peer
})
xPeer.on('leave', (peerInfo: PeerInfo) => {
    // 有peer离开
})
xPeer.on('roomInfo', (users: PeerInfo[]) => {
    // 房间内的peer信息
})
xPeer.on('signal:open', () => {
    // 已连接到signal server
})
xPeer.on('signal:error', () => {
    // 连接signal server失败
})
xPeer.on('signal:close', () => {
    // signal server连接关闭
})
xPeer.on('stream:user', (peer: Peer) => {
    // 有新的用户推送摄像头
})

xPeer.on('stream:display', (peer: Peer) => {
    // 有新的用户推送屏幕
})
xPeer.on('streamStop:display', (peer: Peer)=> {
    // 有用户停止推送屏幕
})


xPeer.on('message', ({ peer, payload }) => {
    // dataChannel收到文本数据
})
xPeer.on('binary', ({ peer, binary }) => {
    // dataChannel收到二进制数据
    // binary is a ArrayBuffer
})

Peer自有事件和方法

Events

// suppose peer is a Peer instance
const peer = xPeer.local.peers[0]

// 连接状态
peer.isConnected // true or false

peer.on('userStream', (stream: MediaStream) => {
    // 该peer推送摄像头
})
peer.on('displayStream', (stream: MediaStream) => {
    // 该peer推送屏幕
})

Methods

通过peer自身发送的方法,可以理解为「私聊」,仅仅是把消息发送给该peer,不会被广播。


// send string
peer.send('message')

// send ArrayBuffer as binary
peer.sendBinary(new ArrayBuffer(...))

Draft

  • 断连,websocket心跳.

  • addTrack -> addEvent -> setRemote 顺序

  • 多人连接应该是多个PeerConnection

  • coturn

  • 先进入房间:negotiate,再分享新的源renegotiate

In short, in order to add video or audio to an existing connection, you need to renegotiate the connection every time you make a media change. Basically you register a listener:

pc.onnegotiationneeded

这个重新negotiate和初次建立的区别差不多,初次建立也会触发onnegotiationneeded事件。
在处理方式唯一不同的地方是:在接收offer时,需要区分是否已有PeerConnection,如果有,则不需要重新建立,只需要更新offer(CreateOffer)。

TODO: 前端

[]断连就退出界面,提示断连。

[]切换摄像头:先退出界面,再重新进入界面,或者重新negotiate

[]声音mute和unmute

[]屏幕共享:取消事件

https://www.w3.org/TR/webrtc/#dfn-update-the-negotiation-needed-flag

TODO: XPeer

tell screen and video

https://www.kevinmoreland.com/articles/03-22-20-webrtc-mediastream-tracks

dataChannel一旦建立之后,再重新设置local和remote都没关系。 独立的sdp-信息可以在sdp中存储。 同理,track一旦接收到之后,再重新设置local和remote也没关系。 独立的sdp-信息可以在sdp中存储。

前端部分:ios自动播放问题¿

推流端:创建dc/推流(打上tag,存下来) -> 触发negotiationneeded(从本地读tag,放到sdp中) -> createOffer & setLocal & send -> receiveAnswer & setLocal -> iceCandidate -> pc.onTrack/dc.onmessage 接收端:receiveOffer -> setRemote -> createAnswer & setLocal -> pc.onTrack / dc.onmessage

pc.onTrack: 读tag区分类别,并分别存储。

一次negotiation(offer-answer)可以推多个流:包括多个dataChannel/多个track。 所以打tag,需要在sdp中一次打完。

单独推流无法匹配上ID,但此时只需要匹配display字段存在,而无需匹配id。

需要匹配trackId的情况只有一次发送多个track时。

每当negotiation完毕后,再createDataChannel/addTrack,都需要重新negotiation。