tag(功能):功能跑通
This commit is contained in:
OrangeRoll
+245
-107
@@ -1,121 +1,259 @@
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import { useState } from 'react'
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import reactLogo from './assets/react.svg'
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import viteLogo from './assets/vite.svg'
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import heroImg from './assets/hero.png'
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import { useEffect, useRef, useState } from 'react'
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import { Room, RoomEvent, Track } from 'livekit-client'
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import './App.css'
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function App() {
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const [count, setCount] = useState(0)
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type Role = 'host' | 'publisher' | 'viewer'
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type TokenResponse = {
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roomName: string
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participantIdentity: string
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participantName: string
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livekitUrl: string
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token: string
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role: Role
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}
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type ScreenFeed = {
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track: Track
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label: string
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}
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function ScreenTrack({ track, label }: ScreenFeed) {
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const mediaContainerRef = useRef<HTMLDivElement>(null)
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useEffect(() => {
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const mediaElement = track.attach()
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mediaElement.autoplay = true
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if (mediaElement instanceof HTMLVideoElement) {
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// Local preview must be muted for browsers to allow autoplay.
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mediaElement.muted = true
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mediaElement.playsInline = true
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void mediaElement.play().catch(() => {
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// The user can still start playback manually if their browser blocks it.
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})
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}
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mediaContainerRef.current?.append(mediaElement)
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return () => {
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mediaElement.remove()
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}
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}, [track])
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return (
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<>
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<section id="center">
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<div className="hero">
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<img src={heroImg} className="base" width="170" height="179" alt="" />
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<img src={reactLogo} className="framework" alt="React logo" />
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<img src={viteLogo} className="vite" alt="Vite logo" />
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</div>
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<div>
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<h1>Get started</h1>
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<p>
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Edit <code>src/App.tsx</code> and save to test <code>HMR</code>
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</p>
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</div>
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<button
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type="button"
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className="counter"
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onClick={() => setCount((count) => count + 1)}
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>
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Count is {count}
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</button>
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<figure className="screen-frame">
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<figcaption>{label}</figcaption>
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<div className="media-slot" ref={mediaContainerRef} />
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</figure>
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)
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}
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function App() {
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const roomRef = useRef<Room | null>(null)
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const [roomName, setRoomName] = useState('demo-room')
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const [participantName, setParticipantName] = useState('')
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const [role, setRole] = useState<Role>('publisher')
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const [connectionState, setConnectionState] = useState<'idle' | 'connecting' | 'connected'>('idle')
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const [isSharing, setIsSharing] = useState(false)
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const [remoteCount, setRemoteCount] = useState(0)
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const [localScreen, setLocalScreen] = useState<ScreenFeed | null>(null)
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const [remoteScreens, setRemoteScreens] = useState<ScreenFeed[]>([])
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const [error, setError] = useState('')
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useEffect(() => {
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return () => {
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roomRef.current?.disconnect()
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}
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}, [])
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function refreshRemoteCount(room: Room) {
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setRemoteCount(room.remoteParticipants.size)
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}
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async function joinRoom() {
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const normalizedRoom = roomName.trim()
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const normalizedName = participantName.trim()
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if (!/^[A-Za-z0-9_-]{3,64}$/.test(normalizedRoom)) {
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setError('房间号只能包含 3–64 个字母、数字、下划线或连字符。')
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return
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}
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if (!normalizedName) {
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setError('请输入显示名称。')
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return
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}
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setError('')
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setConnectionState('connecting')
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try {
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const response = await fetch(`/api/rooms/${encodeURIComponent(normalizedRoom)}/token`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ participantName: normalizedName, role }),
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})
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const payload = (await response.json()) as TokenResponse | { message: string }
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if (!response.ok || !('token' in payload)) {
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throw new Error('message' in payload ? payload.message : '无法获取房间凭证。')
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}
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roomRef.current?.disconnect()
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setLocalScreen(null)
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setRemoteScreens([])
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const room = new Room()
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room.on(RoomEvent.ParticipantConnected, () => refreshRemoteCount(room))
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room.on(RoomEvent.ParticipantDisconnected, () => refreshRemoteCount(room))
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room.on(RoomEvent.TrackSubscribed, (track, publication, participant) => {
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if (track.kind === Track.Kind.Video && publication.source === Track.Source.ScreenShare) {
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setRemoteScreens((screens) => [
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...screens.filter((screen) => screen.track.sid !== track.sid),
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{ track, label: `${participant.name || participant.identity} 的屏幕` },
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])
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}
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})
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room.on(RoomEvent.TrackUnsubscribed, (track) => {
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setRemoteScreens((screens) => screens.filter((screen) => screen.track !== track))
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})
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room.on(RoomEvent.LocalTrackPublished, (publication) => {
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if (publication.source === Track.Source.ScreenShare && publication.track) {
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setLocalScreen({ track: publication.track, label: '你正在共享的屏幕' })
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setIsSharing(true)
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}
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})
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room.on(RoomEvent.LocalTrackUnpublished, (publication) => {
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if (publication.source === Track.Source.ScreenShare) {
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setLocalScreen(null)
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setIsSharing(false)
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}
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})
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room.on(RoomEvent.Disconnected, () => {
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setConnectionState('idle')
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setIsSharing(false)
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setRemoteCount(0)
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setLocalScreen(null)
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setRemoteScreens([])
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})
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await room.connect(payload.livekitUrl, payload.token)
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roomRef.current = room
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refreshRemoteCount(room)
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setConnectionState('connected')
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} catch (cause) {
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setConnectionState('idle')
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setError(cause instanceof Error ? cause.message : '连接房间时发生未知错误。')
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}
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}
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async function toggleScreenShare() {
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const room = roomRef.current
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if (!room) {
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return
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}
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setError('')
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try {
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await room.localParticipant.setScreenShareEnabled(!isSharing)
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} catch (cause) {
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setError(cause instanceof Error ? cause.message : '无法切换屏幕共享。')
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}
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}
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function leaveRoom() {
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roomRef.current?.disconnect()
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roomRef.current = null
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setConnectionState('idle')
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setIsSharing(false)
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setRemoteCount(0)
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setLocalScreen(null)
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setRemoteScreens([])
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}
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const connected = connectionState === 'connected'
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const canShare = role === 'host' || role === 'publisher'
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return (
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<main className="app-shell">
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<header>
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<p className="eyebrow">LIVEKIT · 开发环境</p>
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<h1>屏幕共享房间</h1>
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<p className="subtitle">浏览器直接连接 LiveKit，Ktor 仅签发短期访问凭证。</p>
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</header>
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<section className="join-panel" aria-label="加入房间">
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<label>
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房间号
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<input
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value={roomName}
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onChange={(event) => setRoomName(event.target.value)}
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disabled={connected}
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maxLength={64}
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/>
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</label>
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<label>
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显示名称
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<input
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value={participantName}
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onChange={(event) => setParticipantName(event.target.value)}
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disabled={connected}
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maxLength={64}
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placeholder="例如：张三"
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/>
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</label>
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<label>
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房间角色
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<select value={role} onChange={(event) => setRole(event.target.value as Role)} disabled={connected}>
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<option value="host">Host（可共享）</option>
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<option value="publisher">Publisher（可共享）</option>
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<option value="viewer">Viewer（仅观看）</option>
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</select>
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</label>
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{!connected ? (
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<button type="button" className="primary" onClick={() => void joinRoom()} disabled={connectionState === 'connecting'}>
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{connectionState === 'connecting' ? '正在连接…' : '加入房间'}
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</button>
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) : (
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<button type="button" className="secondary" onClick={leaveRoom}>离开房间</button>
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)}
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</section>
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<div className="ticks"></div>
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{error && <p className="error" role="alert">{error}</p>}
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<section id="next-steps">
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<div id="docs">
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<svg className="icon" role="presentation" aria-hidden="true">
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<use href="/icons.svg#documentation-icon"></use>
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</svg>
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<h2>Documentation</h2>
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<p>Your questions, answered</p>
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<ul>
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<li>
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<a href="https://vite.dev/" target="_blank">
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<img className="logo" src={viteLogo} alt="" />
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Explore Vite
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</a>
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</li>
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<li>
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<a href="https://react.dev/" target="_blank">
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<img className="button-icon" src={reactLogo} alt="" />
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Learn more
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</a>
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</li>
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</ul>
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<section className="status-bar" aria-live="polite">
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<span className={connected ? 'status online' : 'status'}>{connected ? '已连接' : '未连接'}</span>
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<span>其他参与者：{remoteCount}</span>
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{connected && (
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<button type="button" className="share-button" onClick={() => void toggleScreenShare()} disabled={!canShare}>
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{isSharing ? '停止共享屏幕' : '共享屏幕'}
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</button>
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)}
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{connected && !canShare && <span className="hint">Viewer 没有发布权限</span>}
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</section>
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<section className="screens">
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<div className="screen-section">
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<h2>我的屏幕</h2>
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<div className="video-stack">
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{localScreen ? <ScreenTrack {...localScreen} /> : <p className="empty">尚未共享屏幕</p>}
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</div>
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</div>
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<div id="social">
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<svg className="icon" role="presentation" aria-hidden="true">
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<use href="/icons.svg#social-icon"></use>
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</svg>
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<h2>Connect with us</h2>
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<p>Join the Vite community</p>
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<ul>
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<li>
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<a href="https://github.com/vitejs/vite" target="_blank">
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<svg
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className="button-icon"
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role="presentation"
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aria-hidden="true"
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>
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<use href="/icons.svg#github-icon"></use>
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</svg>
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GitHub
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</a>
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</li>
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<li>
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<a href="https://chat.vite.dev/" target="_blank">
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<svg
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className="button-icon"
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role="presentation"
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aria-hidden="true"
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>
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<use href="/icons.svg#discord-icon"></use>
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</svg>
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Discord
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</a>
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</li>
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<li>
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<a href="https://x.com/vite_js" target="_blank">
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<svg
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className="button-icon"
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role="presentation"
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aria-hidden="true"
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>
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<use href="/icons.svg#x-icon"></use>
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</svg>
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X.com
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</a>
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</li>
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<li>
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<a href="https://bsky.app/profile/vite.dev" target="_blank">
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<svg
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className="button-icon"
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role="presentation"
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aria-hidden="true"
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>
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<use href="/icons.svg#bluesky-icon"></use>
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</svg>
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Bluesky
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</a>
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</li>
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</ul>
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<div className="screen-section">
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<h2>远端屏幕</h2>
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<div className="video-stack">
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{remoteScreens.length === 0
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? <p className="empty">等待其他参与者共享屏幕</p>
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: remoteScreens.map((screen) => (
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<ScreenTrack key={screen.track.sid} {...screen} />
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))}
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</div>
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</div>
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</section>
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<div className="ticks"></div>
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<section id="spacer"></section>
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</>
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<p className="development-note">
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当前角色由客户端请求，仅用于本地验证。生产环境必须由应用 JWT 与房间成员权限决定角色。
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</p>
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</main>
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)
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}
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