webrtc/public/client.js

164 lines
7.2 KiB
JavaScript

import { List, ListItem } from './weigets.js'
export default class ClientList {
constructor({ channels = {}, EventListeners = {}, name: username }) {
this.channels = channels
this.EventListeners = EventListeners
const protocol = window.location.protocol === 'https:' ? 'wss' : 'ws'
const host = window.location.host
this.clientlist = []
this.ul = List({})
document.body.appendChild(this.ul)
// 连接 WebSocket
const linkStart = () => {
const websocket = new WebSocket(`${protocol}://${host}/webrtc/music?name=${username}`)
websocket.onmessage = async event => {
const data = JSON.parse(event.data)
const webrtc_init = () => {
const webrtc = new RTCPeerConnection()
webrtc.onicecandidate = event => {
if (event.candidate) {
websocket.send(JSON.stringify({
type: 'candidate',
id: data.id,
candidate: event.candidate
}))
}
}
webrtc.ondatachannel = ({ channel }) => {
console.log('对方建立数据通道', channel.label)
const client = this.clientlist.find(x => x.id === data.id)
const option = this.channels[channel.label]
channel.onopen = event => {
console.log('对方打开数据通道', channel.label)
if (option && option.onopen) {
option.onopen(event, client)
}
}
channel.onmessage = event => {
//console.log('对方发送数据消息', channel.label)
if (option && option.onmessage) {
option.onmessage(event, client)
}
}
channel.onclose = event => {
console.log('对方关闭数据通道', channel.label)
if (option && option.onclose) {
option.onclose(event, client)
}
}
channel.onerror = event => {
console.log('对方数据通道发生错误', channel.label)
if (option && option.onerror) {
option.onerror(event, client)
}
}
}
webrtc.oniceconnectionstatechange = event => {
console.log('WebRTC ICE 连接状态更改:', webrtc.iceConnectionState)
}
const channels = Object.entries(this.channels).map(([name, callback]) => {
const channel = webrtc.createDataChannel(name, { reliable: true })
return channel
})
return { webrtc, channels }
}
if (data.type === 'list') {
//console.log('取得在线对端列表:', data)
const { webrtc, channels } = webrtc_init()
//console.log('发送给对方 offer')
const offer = await webrtc.createOffer()
await webrtc.setLocalDescription(offer)
this.clientlist.push({ id: data.id, name: data.name, webrtc, channels })
websocket.send(JSON.stringify({ type: 'offer', id: data.id, offer }))
this.add(data)
return
}
if (data.type === 'push') {
//console.log('新上线客户端:', data)
return this.add(data)
}
if (data.type === 'pull') {
//console.log('移除客户端:', data)
return this.remove(data)
}
if (data.type === 'offer') {
//console.log('收到对方 offer', data)
const { webrtc, channels } = webrtc_init()
this.clientlist.push({ id: data.id, name: data.name, webrtc, channels })
//console.log('发送给对方 answer')
await webrtc.setRemoteDescription(data.offer)
const answer = await webrtc.createAnswer()
await webrtc.setLocalDescription(answer)
websocket.send(JSON.stringify({ type: 'answer', id: data.id, answer }))
return
}
if (data.type === 'answer') {
//console.log('收到对方 answer', data)
const pc = this.clientlist.find(client => client.id === data.id).webrtc
await pc.setRemoteDescription(data.answer)
return
}
if (data.type === 'candidate') {
console.log('收到 candidate 并将其添加到远程端')
const pc = this.clientlist.find(client => client.id === data.id).webrtc
await pc.addIceCandidate(data.candidate)
return
}
console.log('收到未知数据:', data)
}
websocket.onclose = event => {
console.log('WebSocket 断线重连...')
setTimeout(() => {
//this.websocket = linkStart()
// 调试模式: 直接刷新页面重载
window.location.reload()
}, 3000)
}
return websocket
}
this.websocket = linkStart()
}
setChannel(name, option) {
this.channels[name] = option
}
add(item) {
this.ul.appendChild(ListItem({
id: item.id,
innerText: item.name ?? item.id,
onclick: event => {
},
chidren: []
}))
}
remove(item) {
this.clientlist = this.clientlist.filter(client => client.id !== item.id)
this.ul.removeChild(document.getElementById(item.id))
}
// 添加回调函数
on(name, callback) {
this.EventListeners[name] = callback
}
// 执行回调函数
_on(name, ...args) {
if (this.EventListeners[name]) {
this.EventListeners[name](...args)
}
}
// 通过指定通道发送数据(广播)
send(name, data) {
//console.log('广播数据:', data, '到通道:', name, '到所有客户端')
this.clientlist.forEach(client => {
//console.log('发送数据到客户端:', client.id, client.name, '通道:', name, '数据:', data)
client.channels.filter(ch => ch.label === name).forEach(async ch => {
// 等待 datachannel 打开(临时解决方案)
while (ch.readyState !== 'open') {
await new Promise(resolve => setTimeout(resolve, 100))
}
ch.send(data)
})
})
}
}