{"id":65157,"date":"2026-01-24T15:40:44","date_gmt":"2026-01-24T07:40:44","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/65157.html"},"modified":"2026-01-24T15:40:44","modified_gmt":"2026-01-24T07:40:44","slug":"%e6%9e%84%e5%bb%ba%e8%87%aa%e5%b7%b1%e7%9a%84-webrtc-%e4%bf%a1%e4%bb%a4%e6%9c%8d%e5%8a%a1%e5%99%a8-node-js-%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/65157.html","title":{"rendered":"\u6784\u5efa\u81ea\u5df1\u7684 WebRTC \u4fe1\u4ee4\u670d\u52a1\u5668 (Node.js \u5b9e\u6218)"},"content":{"rendered":"

\u6784\u5efa\u81ea\u5df1\u7684 WebRTC \u4fe1\u4ee4\u670d\u52a1\u5668 (Node.js \u5b9e\u6218)<\/h2>\n

\u672c\u6587\u662f WebRTC \u7cfb\u5217\u4e13\u680f\u7684\u7b2c\u4e8c\u5341\u4e00\u7bc7,\u5c06\u624b\u628a\u624b\u6559\u4f60\u4f7f\u7528 Node.js \u6784\u5efa\u4e00\u4e2a\u5b8c\u6574\u7684 WebRTC \u4fe1\u4ee4\u670d\u52a1\u5668,\u5305\u62ec WebSocket \u901a\u4fe1\u3001\u623f\u95f4\u7ba1\u7406\u548c Offer\/Answer \u4ea4\u6362\u3002<\/p>\n

\n

\u76ee\u5f55<\/h3>\n
  • \u4fe1\u4ee4\u670d\u52a1\u5668\u6982\u8ff0<\/li>\n
  • \u9879\u76ee\u7ed3\u6784<\/li>\n
  • WebSocket \u670d\u52a1\u5668<\/li>\n
  • \u623f\u95f4\u7ba1\u7406<\/li>\n
  • \u4fe1\u4ee4\u6d88\u606f\u5904\u7406<\/li>\n
  • \u5ba2\u6237\u7aef\u5b9e\u73b0<\/li>\n
  • \u5b8c\u6574\u4ee3\u7801<\/li>\n
  • \u90e8\u7f72\u4e0e\u6d4b\u8bd5<\/li>\n
  • \u603b\u7ed3<\/li>\n
    \n

    1. \u4fe1\u4ee4\u670d\u52a1\u5668\u6982\u8ff0<\/h3>\n

    1.1 \u4fe1\u4ee4\u670d\u52a1\u5668\u7684\u4f5c\u7528<\/h4>\n

    \u4fe1\u4ee4\u670d\u52a1\u5668\u804c\u8d23:<\/p>\n

    1. \u7528\u6237\u7ba1\u7406
    \n – \u7528\u6237\u8fde\u63a5\/\u65ad\u5f00
    \n – \u7528\u6237\u8eab\u4efd\u6807\u8bc6<\/p>\n

    2. \u623f\u95f4\u7ba1\u7406
    \n – \u521b\u5efa\/\u52a0\u5165\/\u79bb\u5f00\u623f\u95f4
    \n – \u623f\u95f4\u6210\u5458\u5217\u8868<\/p>\n

    3. \u6d88\u606f\u8f6c\u53d1
    \n – SDP Offer\/Answer
    \n – ICE Candidate
    \n – \u81ea\u5b9a\u4e49\u6d88\u606f<\/p>\n

    4. \u72b6\u6001\u540c\u6b65
    \n – \u7528\u6237\u72b6\u6001
    \n – \u623f\u95f4\u72b6\u6001<\/p>\n

    1.2 \u4fe1\u4ee4\u6d41\u7a0b<\/h4>\n

    \u5b8c\u6574\u4fe1\u4ee4\u6d41\u7a0b:<\/p>\n

    \u7528\u6237 A \u4fe1\u4ee4\u670d\u52a1\u5668 \u7528\u6237 B
    \n | | |
    \n | 1. \u8fde\u63a5 WebSocket | |
    \n | ———————-> | |
    \n | | |
    \n | 2. \u52a0\u5165\u623f\u95f4 "room1" | |
    \n | ———————-> | |
    \n | | |
    \n | | 3. \u8fde\u63a5 WebSocket |
    \n | | <———————- |
    \n | | |
    \n | | 4. \u52a0\u5165\u623f\u95f4 "room1" |
    \n | | <———————- |
    \n | | |
    \n | 5. \u901a\u77e5: B \u52a0\u5165 | |
    \n | <———————- | |
    \n | | |
    \n | 6. \u53d1\u9001 Offer \u7ed9 B | |
    \n | ———————-> | |
    \n | | 7. \u8f6c\u53d1 Offer |
    \n | | ———————-> |
    \n | | |
    \n | | 8. \u53d1\u9001 Answer |
    \n | | <———————- |
    \n | 9. \u8f6c\u53d1 Answer | |
    \n | <———————- | |
    \n | | |
    \n | 10. ICE Candidate \u4ea4\u6362 (\u53cc\u5411) |
    \n | <———————————————-> |
    \n | | |<\/p>\n

    1.3 \u6280\u672f\u9009\u578b<\/h4>\n\n\u6280\u672f\u9009\u62e9\u539f\u56e0<\/tr>\n\n\n\n\n\n
    \u8fd0\u884c\u65f6<\/td>\nNode.js<\/td>\n\u5f02\u6b65 I\/O,\u9002\u5408\u5b9e\u65f6\u5e94\u7528<\/td>\n<\/tr>\n
    WebSocket<\/td>\nws<\/td>\n\u8f7b\u91cf,\u6027\u80fd\u597d<\/td>\n<\/tr>\n
    HTTP<\/td>\nExpress<\/td>\n\u53ef\u9009,\u63d0\u4f9b REST API<\/td>\n<\/tr>\n
    \u6570\u636e\u5b58\u50a8<\/td>\n\u5185\u5b58\/Redis<\/td>\n\u7b80\u5355\u573a\u666f\u7528\u5185\u5b58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n

    2. \u9879\u76ee\u7ed3\u6784<\/h3>\n

    2.1 \u76ee\u5f55\u7ed3\u6784<\/h4>\n

    signaling-server\/
    \n\u251c\u2500\u2500 package.json
    \n\u251c\u2500\u2500 server.js # \u4e3b\u5165\u53e3
    \n\u251c\u2500\u2500 src\/
    \n\u2502 \u251c\u2500\u2500 SignalingServer.js # \u4fe1\u4ee4\u670d\u52a1\u5668\u7c7b
    \n\u2502 \u251c\u2500\u2500 RoomManager.js # \u623f\u95f4\u7ba1\u7406
    \n\u2502 \u251c\u2500\u2500 MessageHandler.js # \u6d88\u606f\u5904\u7406
    \n\u2502 \u2514\u2500\u2500 utils.js # \u5de5\u5177\u51fd\u6570
    \n\u251c\u2500\u2500 client\/
    \n\u2502 \u251c\u2500\u2500 index.html # \u5ba2\u6237\u7aef\u9875\u9762
    \n\u2502 \u251c\u2500\u2500 app.js # \u5ba2\u6237\u7aef\u903b\u8f91
    \n\u2502 \u2514\u2500\u2500 style.css # \u6837\u5f0f
    \n\u2514\u2500\u2500 README.md<\/p>\n

    2.2 package.json<\/h4>\n

    {<\/span>
    \n "name"<\/span>:<\/span> "webrtc-signaling-server"<\/span>,<\/span>
    \n "version"<\/span>:<\/span> "1.0.0"<\/span>,<\/span>
    \n "description"<\/span>:<\/span> "WebRTC Signaling Server"<\/span>,<\/span>
    \n "main"<\/span>:<\/span> "server.js"<\/span>,<\/span>
    \n "scripts"<\/span>:<\/span> {<\/span>
    \n "start"<\/span>:<\/span> "node server.js"<\/span>,<\/span>
    \n "dev"<\/span>:<\/span> "nodemon server.js"<\/span>
    \n }<\/span>,<\/span>
    \n "dependencies"<\/span>:<\/span> {<\/span>
    \n "ws"<\/span>:<\/span> "^8.14.2"<\/span>,<\/span>
    \n "uuid"<\/span>:<\/span> "^9.0.0"<\/span>
    \n }<\/span>,<\/span>
    \n "devDependencies"<\/span>:<\/span> {<\/span>
    \n "nodemon"<\/span>:<\/span> "^3.0.1"<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \n

    3. WebSocket \u670d\u52a1\u5668<\/h3>\n

    3.1 \u57fa\u7840\u670d\u52a1\u5668<\/h4>\n

    \/\/ server.js<\/span>
    \nconst<\/span> WebSocket =<\/span> require<\/span>(<\/span>'ws'<\/span>)<\/span>;<\/span>
    \nconst<\/span> http =<\/span> require<\/span>(<\/span>'http'<\/span>)<\/span>;<\/span>
    \nconst<\/span> {<\/span> SignalingServer }<\/span> =<\/span> require<\/span>(<\/span>'.\/src\/SignalingServer'<\/span>)<\/span>;<\/span><\/p>\n

    const<\/span> PORT<\/span> =<\/span> process.<\/span>env.<\/span>PORT<\/span> ||<\/span> 8080<\/span>;<\/span><\/p>\n

    \/\/ \u521b\u5efa HTTP \u670d\u52a1\u5668<\/span>
    \nconst<\/span> server =<\/span> http.<\/span>createServer<\/span>(<\/span>(<\/span>req,<\/span> res<\/span>)<\/span> =><\/span> {<\/span>
    \n res.<\/span>writeHead<\/span>(<\/span>200<\/span>,<\/span> {<\/span> 'Content-Type'<\/span>:<\/span> 'text\/plain'<\/span> }<\/span>)<\/span>;<\/span>
    \n res.<\/span>end<\/span>(<\/span>'WebRTC Signaling Server'<\/span>)<\/span>;<\/span>
    \n}<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u521b\u5efa WebSocket \u670d\u52a1\u5668<\/span>
    \nconst<\/span> wss =<\/span> new<\/span> WebSocket.<\/span>Server<\/span>(<\/span>{<\/span> server }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u521b\u5efa\u4fe1\u4ee4\u670d\u52a1\u5668\u5b9e\u4f8b<\/span>
    \nconst<\/span> signalingServer =<\/span> new<\/span> SignalingServer<\/span>(<\/span>wss)<\/span>;<\/span><\/p>\n

    \/\/ \u542f\u52a8\u670d\u52a1\u5668<\/span>
    \nserver.<\/span>listen<\/span>(<\/span>PORT<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Signaling server running on port <\/span>${<\/span>PORT<\/span>}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n}<\/span>)<\/span>;<\/span><\/p>\n

    3.2 SignalingServer \u7c7b<\/h4>\n

    \/\/ src\/SignalingServer.js<\/span>
    \nconst<\/span> {<\/span> v4<\/span>:<\/span> uuidv4 }<\/span> =<\/span> require<\/span>(<\/span>'uuid'<\/span>)<\/span>;<\/span>
    \nconst<\/span> {<\/span> RoomManager }<\/span> =<\/span> require<\/span>(<\/span>'.\/RoomManager'<\/span>)<\/span>;<\/span>
    \nconst<\/span> {<\/span> MessageHandler }<\/span> =<\/span> require<\/span>(<\/span>'.\/MessageHandler'<\/span>)<\/span>;<\/span><\/p>\n

    class<\/span> SignalingServer<\/span> {<\/span>
    \n constructor<\/span>(<\/span>wss<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>wss =<\/span> wss;<\/span>
    \n this<\/span>.<\/span>clients =<\/span> new<\/span> Map<\/span>(<\/span>)<\/span>;<\/span> \/\/ clientId -> { ws, userId, roomId }<\/span>
    \n this<\/span>.<\/span>roomManager =<\/span> new<\/span> RoomManager<\/span>(<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>messageHandler =<\/span> new<\/span> MessageHandler<\/span>(<\/span>this<\/span>)<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>init<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    init<\/span>(<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>wss.<\/span>on<\/span>(<\/span>'connection'<\/span>,<\/span> (<\/span>ws,<\/span> req<\/span>)<\/span> =><\/span> {<\/span>
    \n this<\/span>.<\/span>handleConnection<\/span>(<\/span>ws,<\/span> req)<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    handleConnection<\/span>(<\/span>ws,<\/span> req<\/span>)<\/span> {<\/span>
    \n const<\/span> clientId =<\/span> uuidv4<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u4fdd\u5b58\u5ba2\u6237\u7aef\u4fe1\u606f<\/span>
    \n this<\/span>.<\/span>clients.<\/span>set<\/span>(<\/span>clientId,<\/span> {<\/span>
    \n ws,<\/span>
    \n userId<\/span>:<\/span> null<\/span>,<\/span>
    \n roomId<\/span>:<\/span> null<\/span>,<\/span>
    \n connectedAt<\/span>:<\/span> Date.<\/span>now<\/span>(<\/span>)<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    console.<\/span>log<\/span>(<\/span>`<\/span>Client connected: <\/span>${<\/span>clientId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u53d1\u9001\u6b22\u8fce\u6d88\u606f<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>ws,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'welcome'<\/span>,<\/span>
    \n clientId
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5904\u7406\u6d88\u606f<\/span>
    \n ws.<\/span>on<\/span>(<\/span>'message'<\/span>,<\/span> (<\/span>data<\/span>)<\/span> =><\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n const<\/span> message =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span>data)<\/span>;<\/span>
    \n this<\/span>.<\/span>messageHandler.<\/span>handle<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Invalid message:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>ws,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'error'<\/span>,<\/span>
    \n message<\/span>:<\/span> 'Invalid message format'<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5904\u7406\u65ad\u5f00\u8fde\u63a5<\/span>
    \n ws.<\/span>on<\/span>(<\/span>'close'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n this<\/span>.<\/span>handleDisconnect<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5904\u7406\u9519\u8bef<\/span>
    \n ws.<\/span>on<\/span>(<\/span>'error'<\/span>,<\/span> (<\/span>error<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>`<\/span>Client <\/span>${<\/span>clientId}<\/span><\/span> error:<\/span>`<\/span><\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5fc3\u8df3\u68c0\u6d4b<\/span>
    \n ws.<\/span>isAlive =<\/span> true<\/span>;<\/span>
    \n ws.<\/span>on<\/span>(<\/span>'pong'<\/span>,<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n ws.<\/span>isAlive =<\/span> true<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    handleDisconnect<\/span>(<\/span>clientId<\/span>)<\/span> {<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    \/\/ \u79bb\u5f00\u623f\u95f4<\/span>
    \n if<\/span> (<\/span>client.<\/span>roomId)<\/span> {<\/span>
    \n this<\/span>.<\/span>roomManager.<\/span>leaveRoom<\/span>(<\/span>client.<\/span>roomId,<\/span> clientId)<\/span>;<\/span><\/p>\n

    \/\/ \u901a\u77e5\u623f\u95f4\u5185\u5176\u4ed6\u4eba<\/span>
    \n this<\/span>.<\/span>broadcastToRoom<\/span>(<\/span>client.<\/span>roomId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'user-left'<\/span>,<\/span>
    \n userId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n clientId
    \n }<\/span>,<\/span> clientId)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5220\u9664\u5ba2\u6237\u7aef<\/span>
    \n this<\/span>.<\/span>clients.<\/span>delete<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Client disconnected: <\/span>${<\/span>clientId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u53d1\u9001\u6d88\u606f\u7ed9\u5355\u4e2a\u5ba2\u6237\u7aef<\/span>
    \n send<\/span>(<\/span>ws,<\/span> message<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>ws.<\/span>readyState ===<\/span> WebSocket.<\/span>OPEN<\/span>)<\/span> {<\/span>
    \n ws.<\/span>send<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>message)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u53d1\u9001\u6d88\u606f\u7ed9\u6307\u5b9a\u5ba2\u6237\u7aef<\/span>
    \n sendTo<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n if<\/span> (<\/span>client)<\/span> {<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>client.<\/span>ws,<\/span> message)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5e7f\u64ad\u7ed9\u623f\u95f4\u5185\u6240\u6709\u4eba<\/span>
    \n broadcastToRoom<\/span>(<\/span>roomId,<\/span> message,<\/span> excludeClientId =<\/span> null<\/span><\/span>)<\/span> {<\/span>
    \n const<\/span> room =<\/span> this<\/span>.<\/span>roomManager.<\/span>getRoom<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>room)<\/span> return<\/span>;<\/span><\/p>\n

    for<\/span> (<\/span>const<\/span> memberId of<\/span> room.<\/span>members)<\/span> {<\/span>
    \n if<\/span> (<\/span>memberId !==<\/span> excludeClientId)<\/span> {<\/span>
    \n this<\/span>.<\/span>sendTo<\/span>(<\/span>memberId,<\/span> message)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u542f\u52a8\u5fc3\u8df3\u68c0\u6d4b<\/span>
    \n startHeartbeat<\/span>(<\/span>)<\/span> {<\/span>
    \n setInterval<\/span>(<\/span>(<\/span>)<\/span> =><\/span> {<\/span>
    \n this<\/span>.<\/span>wss.<\/span>clients.<\/span>forEach<\/span>(<\/span>(<\/span>ws<\/span>)<\/span> =><\/span> {<\/span>
    \n if<\/span> (<\/span>ws.<\/span>isAlive ===<\/span> false<\/span>)<\/span> {<\/span>
    \n return<\/span> ws.<\/span>terminate<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n ws.<\/span>isAlive =<\/span> false<\/span>;<\/span>
    \n ws.<\/span>ping<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>,<\/span> 30000<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    module.<\/span>exports =<\/span> {<\/span> SignalingServer }<\/span>;<\/span><\/p>\n

    \n

    4. \u623f\u95f4\u7ba1\u7406<\/h3>\n

    4.1 RoomManager \u7c7b<\/h4>\n

    \/\/ src\/RoomManager.js<\/span>
    \nclass<\/span> RoomManager<\/span> {<\/span>
    \n constructor<\/span>(<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>rooms =<\/span> new<\/span> Map<\/span>(<\/span>)<\/span>;<\/span> \/\/ roomId -> Room<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u521b\u5efa\u623f\u95f4<\/span>
    \n createRoom<\/span>(<\/span>roomId,<\/span> options =<\/span> {<\/span>}<\/span><\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>rooms.<\/span>has<\/span>(<\/span>roomId)<\/span>)<\/span> {<\/span>
    \n return<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    const<\/span> room =<\/span> {<\/span>
    \n id<\/span>:<\/span> roomId,<\/span>
    \n members<\/span>:<\/span> new<\/span> Set<\/span>(<\/span>)<\/span>,<\/span>
    \n createdAt<\/span>:<\/span> Date.<\/span>now<\/span>(<\/span>)<\/span>,<\/span>
    \n maxMembers<\/span>:<\/span> options.<\/span>maxMembers ||<\/span> 10<\/span>,<\/span>
    \n isLocked<\/span>:<\/span> false<\/span>,<\/span>
    \n metadata<\/span>:<\/span> options.<\/span>metadata ||<\/span> {<\/span>}<\/span>
    \n }<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>rooms.<\/span>set<\/span>(<\/span>roomId,<\/span> room)<\/span>;<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Room created: <\/span>${<\/span>roomId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n return<\/span> room;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u52a0\u5165\u623f\u95f4<\/span>
    \n joinRoom<\/span>(<\/span>roomId,<\/span> clientId<\/span>)<\/span> {<\/span>
    \n let<\/span> room =<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span><\/p>\n

    \/\/ \u623f\u95f4\u4e0d\u5b58\u5728\u5219\u521b\u5efa<\/span>
    \n if<\/span> (<\/span>!<\/span>room)<\/span> {<\/span>
    \n room =<\/span> this<\/span>.<\/span>createRoom<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u68c0\u67e5\u623f\u95f4\u662f\u5426\u5df2\u6ee1<\/span>
    \n if<\/span> (<\/span>room.<\/span>members.<\/span>size >=<\/span> room.<\/span>maxMembers)<\/span> {<\/span>
    \n return<\/span> {<\/span> success<\/span>:<\/span> false<\/span>,<\/span> error<\/span>:<\/span> 'Room is full'<\/span> }<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u68c0\u67e5\u623f\u95f4\u662f\u5426\u9501\u5b9a<\/span>
    \n if<\/span> (<\/span>room.<\/span>isLocked)<\/span> {<\/span>
    \n return<\/span> {<\/span> success<\/span>:<\/span> false<\/span>,<\/span> error<\/span>:<\/span> 'Room is locked'<\/span> }<\/span>;<\/span>
    \n }<\/span><\/p>\n

    room.<\/span>members.<\/span>add<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Client <\/span>${<\/span>clientId}<\/span><\/span> joined room <\/span>${<\/span>roomId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span><\/p>\n

    return<\/span> {<\/span>
    \n success<\/span>:<\/span> true<\/span>,<\/span>
    \n room<\/span>:<\/span> this<\/span>.<\/span>getRoomInfo<\/span>(<\/span>roomId)<\/span>
    \n }<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u79bb\u5f00\u623f\u95f4<\/span>
    \n leaveRoom<\/span>(<\/span>roomId,<\/span> clientId<\/span>)<\/span> {<\/span>
    \n const<\/span> room =<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>room)<\/span> return<\/span>;<\/span><\/p>\n

    room.<\/span>members.<\/span>delete<\/span>(<\/span>clientId)<\/span>;<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Client <\/span>${<\/span>clientId}<\/span><\/span> left room <\/span>${<\/span>roomId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u623f\u95f4\u4e3a\u7a7a\u5219\u5220\u9664<\/span>
    \n if<\/span> (<\/span>room.<\/span>members.<\/span>size ===<\/span> 0<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>rooms.<\/span>delete<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Room deleted: <\/span>${<\/span>roomId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u83b7\u53d6\u623f\u95f4<\/span>
    \n getRoom<\/span>(<\/span>roomId<\/span>)<\/span> {<\/span>
    \n return<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u83b7\u53d6\u623f\u95f4\u4fe1\u606f (\u4e0d\u5305\u542b\u654f\u611f\u6570\u636e)<\/span>
    \n getRoomInfo<\/span>(<\/span>roomId<\/span>)<\/span> {<\/span>
    \n const<\/span> room =<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>room)<\/span> return<\/span> null<\/span>;<\/span><\/p>\n

    return<\/span> {<\/span>
    \n id<\/span>:<\/span> room.<\/span>id,<\/span>
    \n memberCount<\/span>:<\/span> room.<\/span>members.<\/span>size,<\/span>
    \n members<\/span>:<\/span> Array.<\/span>from<\/span>(<\/span>room.<\/span>members)<\/span>,<\/span>
    \n maxMembers<\/span>:<\/span> room.<\/span>maxMembers,<\/span>
    \n isLocked<\/span>:<\/span> room.<\/span>isLocked
    \n }<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u83b7\u53d6\u6240\u6709\u623f\u95f4\u5217\u8868<\/span>
    \n getRoomList<\/span>(<\/span>)<\/span> {<\/span>
    \n const<\/span> list =<\/span> [<\/span>]<\/span>;<\/span>
    \n for<\/span> (<\/span>const<\/span> [<\/span>roomId,<\/span> room]<\/span> of<\/span> this<\/span>.<\/span>rooms)<\/span> {<\/span>
    \n list.<\/span>push<\/span>(<\/span>{<\/span>
    \n id<\/span>:<\/span> roomId,<\/span>
    \n memberCount<\/span>:<\/span> room.<\/span>members.<\/span>size,<\/span>
    \n maxMembers<\/span>:<\/span> room.<\/span>maxMembers
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span> list;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u9501\u5b9a\/\u89e3\u9501\u623f\u95f4<\/span>
    \n setRoomLock<\/span>(<\/span>roomId,<\/span> isLocked<\/span>)<\/span> {<\/span>
    \n const<\/span> room =<\/span> this<\/span>.<\/span>rooms.<\/span>get<\/span>(<\/span>roomId)<\/span>;<\/span>
    \n if<\/span> (<\/span>room)<\/span> {<\/span>
    \n room.<\/span>isLocked =<\/span> isLocked;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    module.<\/span>exports =<\/span> {<\/span> RoomManager }<\/span>;<\/span><\/p>\n

    \n

    5. \u4fe1\u4ee4\u6d88\u606f\u5904\u7406<\/h3>\n

    5.1 MessageHandler \u7c7b<\/h4>\n

    \/\/ src\/MessageHandler.js<\/span>
    \nclass<\/span> MessageHandler<\/span> {<\/span>
    \n constructor<\/span>(<\/span>server<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>server =<\/span> server;<\/span>
    \n }<\/span><\/p>\n

    handle<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> type }<\/span> =<\/span> message;<\/span><\/p>\n

    switch<\/span> (<\/span>type)<\/span> {<\/span>
    \n case<\/span> 'register'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleRegister<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'join'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleJoin<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'leave'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleLeave<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'offer'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleOffer<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'answer'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleAnswer<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'candidate'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleCandidate<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'message'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleMessage<\/span>(<\/span>clientId,<\/span> message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n default<\/span>:<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Unknown message type: <\/span>${<\/span>type}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u7528\u6237\u6ce8\u518c<\/span>
    \n handleRegister<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> userId }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>client)<\/span> {<\/span>
    \n client.<\/span>userId =<\/span> userId ||<\/span> clientId;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>clientId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'registered'<\/span>,<\/span>
    \n userId<\/span>:<\/span> client.<\/span>userId
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u52a0\u5165\u623f\u95f4<\/span>
    \n handleJoin<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> roomId }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    \/\/ \u5982\u679c\u5df2\u5728\u5176\u4ed6\u623f\u95f4,\u5148\u79bb\u5f00<\/span>
    \n if<\/span> (<\/span>client.<\/span>roomId)<\/span> {<\/span>
    \n this<\/span>.<\/span>handleLeave<\/span>(<\/span>clientId,<\/span> {<\/span> roomId<\/span>:<\/span> client.<\/span>roomId }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u52a0\u5165\u65b0\u623f\u95f4<\/span>
    \n const<\/span> result =<\/span> this<\/span>.<\/span>server.<\/span>roomManager.<\/span>joinRoom<\/span>(<\/span>roomId,<\/span> clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>result.<\/span>success)<\/span> {<\/span>
    \n client.<\/span>roomId =<\/span> roomId;<\/span><\/p>\n

    \/\/ \u901a\u77e5\u52a0\u5165\u8005<\/span>
    \n this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>clientId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'joined'<\/span>,<\/span>
    \n roomId,<\/span>
    \n members<\/span>:<\/span> result.<\/span>room.<\/span>members.<\/span>filter<\/span>(<\/span>id<\/span> =><\/span> id !==<\/span> clientId)<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u901a\u77e5\u623f\u95f4\u5185\u5176\u4ed6\u4eba<\/span>
    \n this<\/span>.<\/span>server.<\/span>broadcastToRoom<\/span>(<\/span>roomId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'user-joined'<\/span>,<\/span>
    \n userId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n clientId
    \n }<\/span>,<\/span> clientId)<\/span>;<\/span>
    \n }<\/span> else<\/span> {<\/span>
    \n this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>clientId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'join-error'<\/span>,<\/span>
    \n error<\/span>:<\/span> result.<\/span>error
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u79bb\u5f00\u623f\u95f4<\/span>
    \n handleLeave<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> roomId }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client ||<\/span> client.<\/span>roomId !==<\/span> roomId)<\/span> return<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>roomManager.<\/span>leaveRoom<\/span>(<\/span>roomId,<\/span> clientId)<\/span>;<\/span><\/p>\n

    \/\/ \u901a\u77e5\u623f\u95f4\u5185\u5176\u4ed6\u4eba<\/span>
    \n this<\/span>.<\/span>server.<\/span>broadcastToRoom<\/span>(<\/span>roomId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'user-left'<\/span>,<\/span>
    \n userId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n clientId
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    client.<\/span>roomId =<\/span> null<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>clientId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'left'<\/span>,<\/span>
    \n roomId
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 Offer<\/span>
    \n handleOffer<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> targetId,<\/span> sdp }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>targetId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'offer'<\/span>,<\/span>
    \n fromId<\/span>:<\/span> clientId,<\/span>
    \n fromUserId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n sdp
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 Answer<\/span>
    \n handleAnswer<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> targetId,<\/span> sdp }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>targetId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'answer'<\/span>,<\/span>
    \n fromId<\/span>:<\/span> clientId,<\/span>
    \n fromUserId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n sdp
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 ICE Candidate<\/span>
    \n handleCandidate<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> targetId,<\/span> candidate }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>targetId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'candidate'<\/span>,<\/span>
    \n fromId<\/span>:<\/span> clientId,<\/span>
    \n candidate
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406\u81ea\u5b9a\u4e49\u6d88\u606f<\/span>
    \n handleMessage<\/span>(<\/span>clientId,<\/span> message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> targetId,<\/span> content }<\/span> =<\/span> message;<\/span>
    \n const<\/span> client =<\/span> this<\/span>.<\/span>server.<\/span>clients.<\/span>get<\/span>(<\/span>clientId)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>client)<\/span> return<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>targetId)<\/span> {<\/span>
    \n \/\/ \u53d1\u9001\u7ed9\u6307\u5b9a\u7528\u6237<\/span>
    \n this<\/span>.<\/span>server.<\/span>sendTo<\/span>(<\/span>targetId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'message'<\/span>,<\/span>
    \n fromId<\/span>:<\/span> clientId,<\/span>
    \n fromUserId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n content
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span> else<\/span> if<\/span> (<\/span>client.<\/span>roomId)<\/span> {<\/span>
    \n \/\/ \u5e7f\u64ad\u7ed9\u623f\u95f4<\/span>
    \n this<\/span>.<\/span>server.<\/span>broadcastToRoom<\/span>(<\/span>client.<\/span>roomId,<\/span> {<\/span>
    \n type<\/span>:<\/span> 'message'<\/span>,<\/span>
    \n fromId<\/span>:<\/span> clientId,<\/span>
    \n fromUserId<\/span>:<\/span> client.<\/span>userId,<\/span>
    \n content
    \n }<\/span>,<\/span> clientId)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    module.<\/span>exports =<\/span> {<\/span> MessageHandler }<\/span>;<\/span><\/p>\n

    \n

    6. \u5ba2\u6237\u7aef\u5b9e\u73b0<\/h3>\n

    6.1 HTML \u9875\u9762<\/h4>\n

    <!– client\/index.html –><\/span>
    \n<!<\/span>DOCTYPE<\/span> html<\/span>><\/span><\/span>
    \n<<\/span>html<\/span> lang<\/span>=<\/span>"<\/span>zh-CN"<\/span><\/span>><\/span><\/span>
    \n<<\/span>head<\/span>><\/span><\/span>
    \n <<\/span>meta<\/span> charset<\/span>=<\/span>"<\/span>UTF-8"<\/span><\/span>><\/span><\/span>
    \n <<\/span>meta<\/span> name<\/span>=<\/span>"<\/span>viewport"<\/span><\/span> content<\/span>=<\/span>"<\/span>width=device-width, initial-scale=1.0"<\/span><\/span>><\/span><\/span>
    \n <<\/span>title<\/span>><\/span><\/span>WebRTC Video Chat<\/<\/span>title<\/span>><\/span><\/span>
    \n <<\/span>link<\/span> rel<\/span>=<\/span>"<\/span>stylesheet"<\/span><\/span> href<\/span>=<\/span>"<\/span>style.css"<\/span><\/span>><\/span><\/span>
    \n<\/<\/span>head<\/span>><\/span><\/span>
    \n<<\/span>body<\/span>><\/span><\/span>
    \n <<\/span>div<\/span> class<\/span>=<\/span>"<\/span>container"<\/span><\/span>><\/span><\/span>
    \n <<\/span>h1<\/span>><\/span><\/span>WebRTC Video Chat<\/<\/span>h1<\/span>><\/span><\/span><\/p>\n

    <<\/span>div<\/span> class<\/span>=<\/span>"<\/span>controls"<\/span><\/span>><\/span><\/span>
    \n <<\/span>input<\/span> type<\/span>=<\/span>"<\/span>text"<\/span><\/span> id<\/span>=<\/span>"<\/span>roomId"<\/span><\/span> placeholder<\/span>=<\/span>"<\/span>\u623f\u95f4 ID"<\/span><\/span>><\/span><\/span>
    \n <<\/span>button<\/span> id<\/span>=<\/span>"<\/span>joinBtn"<\/span><\/span>><\/span><\/span>\u52a0\u5165\u623f\u95f4<\/<\/span>button<\/span>><\/span><\/span>
    \n <<\/span>button<\/span> id<\/span>=<\/span>"<\/span>leaveBtn"<\/span><\/span> disabled<\/span>><\/span><\/span>\u79bb\u5f00\u623f\u95f4<\/<\/span>button<\/span>><\/span><\/span>
    \n <\/<\/span>div<\/span>><\/span><\/span><\/p>\n

    <<\/span>div<\/span> class<\/span>=<\/span>"<\/span>video-container"<\/span><\/span>><\/span><\/span>
    \n <<\/span>div<\/span> class<\/span>=<\/span>"<\/span>video-wrapper"<\/span><\/span>><\/span><\/span>
    \n <<\/span>video<\/span> id<\/span>=<\/span>"<\/span>localVideo"<\/span><\/span> autoplay<\/span> muted<\/span> playsinline<\/span>><\/span><\/span><\/<\/span>video<\/span>><\/span><\/span>
    \n <<\/span>span<\/span> class<\/span>=<\/span>"<\/span>label"<\/span><\/span>><\/span><\/span>\u672c\u5730\u89c6\u9891<\/<\/span>span<\/span>><\/span><\/span>
    \n <\/<\/span>div<\/span>><\/span><\/span>
    \n <<\/span>div<\/span> id<\/span>=<\/span>"<\/span>remoteVideos"<\/span><\/span>><\/span><\/span><\/<\/span>div<\/span>><\/span><\/span>
    \n <\/<\/span>div<\/span>><\/span><\/span><\/p>\n

    <<\/span>div<\/span> class<\/span>=<\/span>"<\/span>status"<\/span><\/span>><\/span><\/span>
    \n <<\/span>span<\/span> id<\/span>=<\/span>"<\/span>connectionStatus"<\/span><\/span>><\/span><\/span>\u672a\u8fde\u63a5<\/<\/span>span<\/span>><\/span><\/span>
    \n <\/<\/span>div<\/span>><\/span><\/span>
    \n <\/<\/span>div<\/span>><\/span><\/span><\/p>\n

    <<\/span>script<\/span> src<\/span>=<\/span>"<\/span>app.js"<\/span><\/span>><\/span><\/span><\/span><\/<\/span>script<\/span>><\/span><\/span>
    \n<\/<\/span>body<\/span>><\/span><\/span>
    \n<\/<\/span>html<\/span>><\/span><\/span><\/p>\n

    6.2 \u5ba2\u6237\u7aef JavaScript<\/h4>\n

    \/\/ client\/app.js<\/span>
    \nclass<\/span> WebRTCClient<\/span> {<\/span>
    \n constructor<\/span>(<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>ws =<\/span> null<\/span>;<\/span>
    \n this<\/span>.<\/span>clientId =<\/span> null<\/span>;<\/span>
    \n this<\/span>.<\/span>roomId =<\/span> null<\/span>;<\/span>
    \n this<\/span>.<\/span>localStream =<\/span> null<\/span>;<\/span>
    \n this<\/span>.<\/span>peerConnections =<\/span> new<\/span> Map<\/span>(<\/span>)<\/span>;<\/span> \/\/ peerId -> RTCPeerConnection<\/span><\/p>\n

    this<\/span>.<\/span>config =<\/span> {<\/span>
    \n iceServers<\/span>:<\/span> [<\/span>
    \n {<\/span> urls<\/span>:<\/span> 'stun:stun.l.google.com:19302'<\/span> }<\/span>
    \n ]<\/span>
    \n }<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>init<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    init<\/span>(<\/span>)<\/span> {<\/span>
    \n \/\/ \u7ed1\u5b9a UI \u4e8b\u4ef6<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'joinBtn'<\/span>)<\/span>.<\/span>onclick<\/span> =<\/span> (<\/span>)<\/span> =><\/span> this<\/span>.<\/span>joinRoom<\/span>(<\/span>)<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'leaveBtn'<\/span>)<\/span>.<\/span>onclick<\/span> =<\/span> (<\/span>)<\/span> =><\/span> this<\/span>.<\/span>leaveRoom<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u8fde\u63a5\u4fe1\u4ee4\u670d\u52a1\u5668<\/span>
    \n this<\/span>.<\/span>connectSignaling<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u8fde\u63a5\u4fe1\u4ee4\u670d\u52a1\u5668<\/span>
    \n connectSignaling<\/span>(<\/span>)<\/span> {<\/span>
    \n const<\/span> wsUrl =<\/span> `<\/span>ws:\/\/<\/span>${<\/span>window.<\/span>location.<\/span>hostname}<\/span><\/span>:8080<\/span>`<\/span><\/span>;<\/span>
    \n this<\/span>.<\/span>ws =<\/span> new<\/span> WebSocket<\/span>(<\/span>wsUrl)<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>ws.<\/span>onopen<\/span> =<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'Connected to signaling server'<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>updateStatus<\/span>(<\/span>'\u5df2\u8fde\u63a5'<\/span>)<\/span>;<\/span>
    \n }<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>ws.<\/span>onclose<\/span> =<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'Disconnected from signaling server'<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>updateStatus<\/span>(<\/span>'\u5df2\u65ad\u5f00'<\/span>)<\/span>;<\/span>
    \n \/\/ \u5c1d\u8bd5\u91cd\u8fde<\/span>
    \n setTimeout<\/span>(<\/span>(<\/span>)<\/span> =><\/span> this<\/span>.<\/span>connectSignaling<\/span>(<\/span>)<\/span>,<\/span> 3000<\/span>)<\/span>;<\/span>
    \n }<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>ws.<\/span>onerror<\/span> =<\/span> (<\/span>error<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'WebSocket error:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>ws.<\/span>onmessage<\/span> =<\/span> (<\/span>event<\/span>)<\/span> =><\/span> {<\/span>
    \n const<\/span> message =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span>event.<\/span>data)<\/span>;<\/span>
    \n this<\/span>.<\/span>handleMessage<\/span>(<\/span>message)<\/span>;<\/span>
    \n }<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406\u4fe1\u4ee4\u6d88\u606f<\/span>
    \n handleMessage<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'Received:'<\/span>,<\/span> message.<\/span>type)<\/span>;<\/span><\/p>\n

    switch<\/span> (<\/span>message.<\/span>type)<\/span> {<\/span>
    \n case<\/span> 'welcome'<\/span>:<\/span>
    \n this<\/span>.<\/span>clientId =<\/span> message.<\/span>clientId;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'joined'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleJoined<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'user-joined'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleUserJoined<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'user-left'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleUserLeft<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'offer'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleOffer<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'answer'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleAnswer<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n case<\/span> 'candidate'<\/span>:<\/span>
    \n this<\/span>.<\/span>handleCandidate<\/span>(<\/span>message)<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u53d1\u9001\u4fe1\u4ee4\u6d88\u606f<\/span>
    \n send<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>ws.<\/span>readyState ===<\/span> WebSocket.<\/span>OPEN<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>ws.<\/span>send<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>message)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u52a0\u5165\u623f\u95f4<\/span>
    \n async<\/span> joinRoom<\/span>(<\/span>)<\/span> {<\/span>
    \n const<\/span> roomId =<\/span> document.<\/span>getElementById<\/span>(<\/span>'roomId'<\/span>)<\/span>.<\/span>value.<\/span>trim<\/span>(<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>roomId)<\/span> {<\/span>
    \n alert<\/span>(<\/span>'\u8bf7\u8f93\u5165\u623f\u95f4 ID'<\/span>)<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u83b7\u53d6\u672c\u5730\u5a92\u4f53\u6d41<\/span>
    \n try<\/span> {<\/span>
    \n this<\/span>.<\/span>localStream =<\/span> await<\/span> navigator.<\/span>mediaDevices.<\/span>getUserMedia<\/span>(<\/span>{<\/span>
    \n video<\/span>:<\/span> true<\/span>,<\/span>
    \n audio<\/span>:<\/span> true<\/span>
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    document.<\/span>getElementById<\/span>(<\/span>'localVideo'<\/span>)<\/span>.<\/span>srcObject =<\/span> this<\/span>.<\/span>localStream;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Failed to get media:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n alert<\/span>(<\/span>'\u65e0\u6cd5\u83b7\u53d6\u6444\u50cf\u5934\/\u9ea6\u514b\u98ce'<\/span>)<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u53d1\u9001\u52a0\u5165\u8bf7\u6c42<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>{<\/span>
    \n type<\/span>:<\/span> 'join'<\/span>,<\/span>
    \n roomId
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>roomId =<\/span> roomId;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'joinBtn'<\/span>)<\/span>.<\/span>disabled =<\/span> true<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'leaveBtn'<\/span>)<\/span>.<\/span>disabled =<\/span> false<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u79bb\u5f00\u623f\u95f4<\/span>
    \n leaveRoom<\/span>(<\/span>)<\/span> {<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>{<\/span>
    \n type<\/span>:<\/span> 'leave'<\/span>,<\/span>
    \n roomId<\/span>:<\/span> this<\/span>.<\/span>roomId
    \n }<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5173\u95ed\u6240\u6709\u8fde\u63a5<\/span>
    \n for<\/span> (<\/span>const<\/span> [<\/span>peerId,<\/span> pc]<\/span> of<\/span> this<\/span>.<\/span>peerConnections)<\/span> {<\/span>
    \n pc.<\/span>close<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n this<\/span>.<\/span>peerConnections.<\/span>clear<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u505c\u6b62\u672c\u5730\u6d41<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>localStream)<\/span> {<\/span>
    \n this<\/span>.<\/span>localStream.<\/span>getTracks<\/span>(<\/span>)<\/span>.<\/span>forEach<\/span>(<\/span>track<\/span> =><\/span> track.<\/span>stop<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>localStream =<\/span> null<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6e05\u7406\u8fdc\u7a0b\u89c6\u9891<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'remoteVideos'<\/span>)<\/span>.<\/span>innerHTML =<\/span> ''<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'localVideo'<\/span>)<\/span>.<\/span>srcObject =<\/span> null<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>roomId =<\/span> null<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'joinBtn'<\/span>)<\/span>.<\/span>disabled =<\/span> false<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'leaveBtn'<\/span>)<\/span>.<\/span>disabled =<\/span> true<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406\u52a0\u5165\u6210\u529f<\/span>
    \n handleJoined<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'Joined room, members:'<\/span>,<\/span> message.<\/span>members)<\/span>;<\/span><\/p>\n

    \/\/ \u5411\u623f\u95f4\u5185\u5df2\u6709\u6210\u5458\u53d1\u8d77\u8fde\u63a5<\/span>
    \n for<\/span> (<\/span>const<\/span> memberId of<\/span> message.<\/span>members)<\/span> {<\/span>
    \n this<\/span>.<\/span>createPeerConnection<\/span>(<\/span>memberId,<\/span> true<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406\u65b0\u7528\u6237\u52a0\u5165<\/span>
    \n handleUserJoined<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'User joined:'<\/span>,<\/span> message.<\/span>clientId)<\/span>;<\/span>
    \n \/\/ \u7b49\u5f85\u65b0\u7528\u6237\u53d1\u8d77 Offer<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406\u7528\u6237\u79bb\u5f00<\/span>
    \n handleUserLeft<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>'User left:'<\/span>,<\/span> message.<\/span>clientId)<\/span>;<\/span><\/p>\n

    const<\/span> pc =<\/span> this<\/span>.<\/span>peerConnections.<\/span>get<\/span>(<\/span>message.<\/span>clientId)<\/span>;<\/span>
    \n if<\/span> (<\/span>pc)<\/span> {<\/span>
    \n pc.<\/span>close<\/span>(<\/span>)<\/span>;<\/span>
    \n this<\/span>.<\/span>peerConnections.<\/span>delete<\/span>(<\/span>message.<\/span>clientId)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u79fb\u9664\u8fdc\u7a0b\u89c6\u9891<\/span>
    \n const<\/span> videoEl =<\/span> document.<\/span>getElementById<\/span>(<\/span>`<\/span>video-<\/span>${<\/span>message.<\/span>clientId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>videoEl)<\/span> {<\/span>
    \n videoEl.<\/span>parentElement.<\/span>remove<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u521b\u5efa PeerConnection<\/span>
    \n async<\/span> createPeerConnection<\/span>(<\/span>peerId,<\/span> isInitiator<\/span>)<\/span> {<\/span>
    \n const<\/span> pc =<\/span> new<\/span> RTCPeerConnection<\/span>(<\/span>this<\/span>.<\/span>config)<\/span>;<\/span>
    \n this<\/span>.<\/span>peerConnections.<\/span>set<\/span>(<\/span>peerId,<\/span> pc)<\/span>;<\/span><\/p>\n

    \/\/ \u6dfb\u52a0\u672c\u5730\u6d41<\/span>
    \n if<\/span> (<\/span>this<\/span>.<\/span>localStream)<\/span> {<\/span>
    \n this<\/span>.<\/span>localStream.<\/span>getTracks<\/span>(<\/span>)<\/span>.<\/span>forEach<\/span>(<\/span>track<\/span> =><\/span> {<\/span>
    \n pc.<\/span>addTrack<\/span>(<\/span>track,<\/span> this<\/span>.<\/span>localStream)<\/span>;<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 ICE Candidate<\/span>
    \n pc.<\/span>onicecandidate<\/span> =<\/span> (<\/span>event<\/span>)<\/span> =><\/span> {<\/span>
    \n if<\/span> (<\/span>event.<\/span>candidate)<\/span> {<\/span>
    \n this<\/span>.<\/span>send<\/span>(<\/span>{<\/span>
    \n type<\/span>:<\/span> 'candidate'<\/span>,<\/span>
    \n targetId<\/span>:<\/span> peerId,<\/span>
    \n candidate<\/span>:<\/span> event.<\/span>candidate
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>;<\/span><\/p>\n

    \/\/ \u5904\u7406\u8fdc\u7a0b\u6d41<\/span>
    \n pc.<\/span>ontrack<\/span> =<\/span> (<\/span>event<\/span>)<\/span> =><\/span> {<\/span>
    \n this<\/span>.<\/span>addRemoteVideo<\/span>(<\/span>peerId,<\/span> event.<\/span>streams[<\/span>0<\/span>]<\/span>)<\/span>;<\/span>
    \n }<\/span>;<\/span><\/p>\n

    \/\/ \u5904\u7406\u8fde\u63a5\u72b6\u6001\u53d8\u5316<\/span>
    \n pc.<\/span>onconnectionstatechange<\/span> =<\/span> (<\/span>)<\/span> =><\/span> {<\/span>
    \n console.<\/span>log<\/span>(<\/span>`<\/span>Connection state with <\/span>${<\/span>peerId}<\/span><\/span>:<\/span>`<\/span><\/span>,<\/span> pc.<\/span>connectionState)<\/span>;<\/span>
    \n }<\/span>;<\/span><\/p>\n

    \/\/ \u5982\u679c\u662f\u53d1\u8d77\u65b9,\u521b\u5efa Offer<\/span>
    \n if<\/span> (<\/span>isInitiator)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n const<\/span> offer =<\/span> await<\/span> pc.<\/span>createOffer<\/span>(<\/span>)<\/span>;<\/span>
    \n await<\/span> pc.<\/span>setLocalDescription<\/span>(<\/span>offer)<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>send<\/span>(<\/span>{<\/span>
    \n type<\/span>:<\/span> 'offer'<\/span>,<\/span>
    \n targetId<\/span>:<\/span> peerId,<\/span>
    \n sdp<\/span>:<\/span> offer
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Failed to create offer:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    return<\/span> pc;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 Offer<\/span>
    \n async<\/span> handleOffer<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> fromId,<\/span> sdp }<\/span> =<\/span> message;<\/span><\/p>\n

    let<\/span> pc =<\/span> this<\/span>.<\/span>peerConnections.<\/span>get<\/span>(<\/span>fromId)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>pc)<\/span> {<\/span>
    \n pc =<\/span> await<\/span> this<\/span>.<\/span>createPeerConnection<\/span>(<\/span>fromId,<\/span> false<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    try<\/span> {<\/span>
    \n await<\/span> pc.<\/span>setRemoteDescription<\/span>(<\/span>new<\/span> RTCSessionDescription<\/span>(<\/span>sdp)<\/span>)<\/span>;<\/span>
    \n const<\/span> answer =<\/span> await<\/span> pc.<\/span>createAnswer<\/span>(<\/span>)<\/span>;<\/span>
    \n await<\/span> pc.<\/span>setLocalDescription<\/span>(<\/span>answer)<\/span>;<\/span><\/p>\n

    this<\/span>.<\/span>send<\/span>(<\/span>{<\/span>
    \n type<\/span>:<\/span> 'answer'<\/span>,<\/span>
    \n targetId<\/span>:<\/span> fromId,<\/span>
    \n sdp<\/span>:<\/span> answer
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Failed to handle offer:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 Answer<\/span>
    \n async<\/span> handleAnswer<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> fromId,<\/span> sdp }<\/span> =<\/span> message;<\/span><\/p>\n

    const<\/span> pc =<\/span> this<\/span>.<\/span>peerConnections.<\/span>get<\/span>(<\/span>fromId)<\/span>;<\/span>
    \n if<\/span> (<\/span>pc)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n await<\/span> pc.<\/span>setRemoteDescription<\/span>(<\/span>new<\/span> RTCSessionDescription<\/span>(<\/span>sdp)<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Failed to handle answer:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5904\u7406 ICE Candidate<\/span>
    \n async<\/span> handleCandidate<\/span>(<\/span>message<\/span>)<\/span> {<\/span>
    \n const<\/span> {<\/span> fromId,<\/span> candidate }<\/span> =<\/span> message;<\/span><\/p>\n

    const<\/span> pc =<\/span> this<\/span>.<\/span>peerConnections.<\/span>get<\/span>(<\/span>fromId)<\/span>;<\/span>
    \n if<\/span> (<\/span>pc)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n await<\/span> pc.<\/span>addIceCandidate<\/span>(<\/span>new<\/span> RTCIceCandidate<\/span>(<\/span>candidate)<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>error)<\/span> {<\/span>
    \n console.<\/span>error<\/span>(<\/span>'Failed to add ICE candidate:'<\/span>,<\/span> error)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6dfb\u52a0\u8fdc\u7a0b\u89c6\u9891<\/span>
    \n addRemoteVideo<\/span>(<\/span>peerId,<\/span> stream<\/span>)<\/span> {<\/span>
    \n let<\/span> videoEl =<\/span> document.<\/span>getElementById<\/span>(<\/span>`<\/span>video-<\/span>${<\/span>peerId}<\/span><\/span>`<\/span><\/span>)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>!<\/span>videoEl)<\/span> {<\/span>
    \n const<\/span> wrapper =<\/span> document.<\/span>createElement<\/span>(<\/span>'div'<\/span>)<\/span>;<\/span>
    \n wrapper.<\/span>className =<\/span> 'video-wrapper'<\/span>;<\/span><\/p>\n

    videoEl =<\/span> document.<\/span>createElement<\/span>(<\/span>'video'<\/span>)<\/span>;<\/span>
    \n videoEl.<\/span>id =<\/span> `<\/span>video-<\/span>${<\/span>peerId}<\/span><\/span>`<\/span><\/span>;<\/span>
    \n videoEl.<\/span>autoplay =<\/span> true<\/span>;<\/span>
    \n videoEl.<\/span>playsinline =<\/span> true<\/span>;<\/span><\/p>\n

    const<\/span> label =<\/span> document.<\/span>createElement<\/span>(<\/span>'span'<\/span>)<\/span>;<\/span>
    \n label.<\/span>className =<\/span> 'label'<\/span>;<\/span>
    \n label.<\/span>textContent =<\/span> `<\/span>\u8fdc\u7a0b: <\/span>${<\/span>peerId.<\/span>slice<\/span>(<\/span>0<\/span>,<\/span> 8<\/span>)<\/span>}<\/span><\/span>`<\/span><\/span>;<\/span><\/p>\n

    wrapper.<\/span>appendChild<\/span>(<\/span>videoEl)<\/span>;<\/span>
    \n wrapper.<\/span>appendChild<\/span>(<\/span>label)<\/span>;<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'remoteVideos'<\/span>)<\/span>.<\/span>appendChild<\/span>(<\/span>wrapper)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    videoEl.<\/span>srcObject =<\/span> stream;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u66f4\u65b0\u72b6\u6001\u663e\u793a<\/span>
    \n updateStatus<\/span>(<\/span>status<\/span>)<\/span> {<\/span>
    \n document.<\/span>getElementById<\/span>(<\/span>'connectionStatus'<\/span>)<\/span>.<\/span>textContent =<\/span> status;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \/\/ \u542f\u52a8\u5ba2\u6237\u7aef<\/span>
    \nconst<\/span> client =<\/span> new<\/span> WebRTCClient<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    6.3 CSS \u6837\u5f0f<\/h4>\n

    \/* client\/style.css *\/<\/span>
    \n*<\/span> {<\/span>
    \n box-sizing<\/span>:<\/span> border-box;<\/span>
    \n margin<\/span>:<\/span> 0;<\/span>
    \n padding<\/span>:<\/span> 0;<\/span>
    \n}<\/span><\/p>\n

    body<\/span> {<\/span>
    \n font-family<\/span>:<\/span> -apple-system,<\/span> BlinkMacSystemFont,<\/span> 'Segoe UI'<\/span>,<\/span> Roboto,<\/span> sans-serif;<\/span>
    \n background<\/span>:<\/span> #1a1a2e;<\/span>
    \n color<\/span>:<\/span> #eee;<\/span>
    \n min-height<\/span>:<\/span> 100vh;<\/span>
    \n}<\/span><\/p>\n

    .container<\/span> {<\/span>
    \n max-width<\/span>:<\/span> 1200px;<\/span>
    \n margin<\/span>:<\/span> 0 auto;<\/span>
    \n padding<\/span>:<\/span> 20px;<\/span>
    \n}<\/span><\/p>\n

    h1<\/span> {<\/span>
    \n text-align<\/span>:<\/span> center;<\/span>
    \n margin-bottom<\/span>:<\/span> 20px;<\/span>
    \n color<\/span>:<\/span> #00d9ff;<\/span>
    \n}<\/span><\/p>\n

    .controls<\/span> {<\/span>
    \n display<\/span>:<\/span> flex;<\/span>
    \n gap<\/span>:<\/span> 10px;<\/span>
    \n justify-content<\/span>:<\/span> center;<\/span>
    \n margin-bottom<\/span>:<\/span> 20px;<\/span>
    \n}<\/span><\/p>\n

    input<\/span> {<\/span>
    \n padding<\/span>:<\/span> 10px 15px;<\/span>
    \n border<\/span>:<\/span> none;<\/span>
    \n border-radius<\/span>:<\/span> 5px;<\/span>
    \n background<\/span>:<\/span> #16213e;<\/span>
    \n color<\/span>:<\/span> #eee;<\/span>
    \n font-size<\/span>:<\/span> 16px;<\/span>
    \n}<\/span><\/p>\n

    button<\/span> {<\/span>
    \n padding<\/span>:<\/span> 10px 20px;<\/span>
    \n border<\/span>:<\/span> none;<\/span>
    \n border-radius<\/span>:<\/span> 5px;<\/span>
    \n background<\/span>:<\/span> #00d9ff;<\/span>
    \n color<\/span>:<\/span> #1a1a2e;<\/span>
    \n font-size<\/span>:<\/span> 16px;<\/span>
    \n cursor<\/span>:<\/span> pointer;<\/span>
    \n transition<\/span>:<\/span> background 0.3s;<\/span>
    \n}<\/span><\/p>\n

    button:hover:not(:disabled)<\/span> {<\/span>
    \n background<\/span>:<\/span> #00b8d9;<\/span>
    \n}<\/span><\/p>\n

    button:disabled<\/span> {<\/span>
    \n background<\/span>:<\/span> #555;<\/span>
    \n cursor<\/span>:<\/span> not-allowed;<\/span>
    \n}<\/span><\/p>\n

    .video-container<\/span> {<\/span>
    \n display<\/span>:<\/span> flex;<\/span>
    \n flex-wrap<\/span>:<\/span> wrap;<\/span>
    \n gap<\/span>:<\/span> 20px;<\/span>
    \n justify-content<\/span>:<\/span> center;<\/span>
    \n}<\/span><\/p>\n

    .video-wrapper<\/span> {<\/span>
    \n position<\/span>:<\/span> relative;<\/span>
    \n background<\/span>:<\/span> #16213e;<\/span>
    \n border-radius<\/span>:<\/span> 10px;<\/span>
    \n overflow<\/span>:<\/span> hidden;<\/span>
    \n}<\/span><\/p>\n

    video<\/span> {<\/span>
    \n width<\/span>:<\/span> 400px;<\/span>
    \n height<\/span>:<\/span> 300px;<\/span>
    \n object-fit<\/span>:<\/span> cover;<\/span>
    \n}<\/span><\/p>\n

    .label<\/span> {<\/span>
    \n position<\/span>:<\/span> absolute;<\/span>
    \n bottom<\/span>:<\/span> 10px;<\/span>
    \n left<\/span>:<\/span> 10px;<\/span>
    \n background<\/span>:<\/span> rgba<\/span>(<\/span>0,<\/span> 0,<\/span> 0,<\/span> 0.7)<\/span>;<\/span>
    \n padding<\/span>:<\/span> 5px 10px;<\/span>
    \n border-radius<\/span>:<\/span> 5px;<\/span>
    \n font-size<\/span>:<\/span> 14px;<\/span>
    \n}<\/span><\/p>\n

    .status<\/span> {<\/span>
    \n text-align<\/span>:<\/span> center;<\/span>
    \n margin-top<\/span>:<\/span> 20px;<\/span>
    \n color<\/span>:<\/span> #888;<\/span>
    \n}<\/span><\/p>\n

    #remoteVideos<\/span> {<\/span>
    \n display<\/span>:<\/span> flex;<\/span>
    \n flex-wrap<\/span>:<\/span> wrap;<\/span>
    \n gap<\/span>:<\/span> 20px;<\/span>
    \n}<\/span><\/p>\n

    \n

    7. \u5b8c\u6574\u4ee3\u7801<\/h3>\n

    7.1 \u5de5\u5177\u51fd\u6570<\/h4>\n

    \/\/ src\/utils.js<\/span>
    \nfunction<\/span> generateId<\/span>(<\/span>length =<\/span> 8<\/span><\/span>)<\/span> {<\/span>
    \n const<\/span> chars =<\/span> 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'<\/span>;<\/span>
    \n let<\/span> result =<\/span> ''<\/span>;<\/span>
    \n for<\/span> (<\/span>let<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> length;<\/span> i++<\/span>)<\/span> {<\/span>
    \n result +=<\/span> chars.<\/span>charAt<\/span>(<\/span>Math.<\/span>floor<\/span>(<\/span>Math.<\/span>random<\/span>(<\/span>)<\/span> *<\/span> chars.<\/span>length)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span> result;<\/span>
    \n}<\/span><\/p>\n

    function<\/span> formatTime<\/span>(<\/span>timestamp<\/span>)<\/span> {<\/span>
    \n return<\/span> new<\/span> Date<\/span>(<\/span>timestamp)<\/span>.<\/span>toISOString<\/span>(<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    module.<\/span>exports =<\/span> {<\/span> generateId,<\/span> formatTime }<\/span>;<\/span><\/p>\n

    \n

    8. \u90e8\u7f72\u4e0e\u6d4b\u8bd5<\/h3>\n

    8.1 \u672c\u5730\u8fd0\u884c<\/h4>\n

    # \u5b89\u88c5\u4f9d\u8d56<\/span>
    \nnpm<\/span> install<\/span><\/p>\n

    # \u542f\u52a8\u670d\u52a1\u5668<\/span>
    \nnpm<\/span> start<\/p>\n

    # \u5f00\u53d1\u6a21\u5f0f (\u81ea\u52a8\u91cd\u542f)<\/span>
    \nnpm<\/span> run dev<\/p>\n

    8.2 \u6d4b\u8bd5\u6b65\u9aa4<\/h4>\n

    1. \u542f\u52a8\u4fe1\u4ee4\u670d\u52a1\u5668
    \n npm start<\/p>\n

    2. \u542f\u52a8\u9759\u6001\u6587\u4ef6\u670d\u52a1\u5668 (\u5ba2\u6237\u7aef)
    \n cd client
    \n npx http-server -p 3000<\/p>\n

    3. \u6253\u5f00\u4e24\u4e2a\u6d4f\u89c8\u5668\u7a97\u53e3
    \n http:\/\/localhost:3000<\/p>\n

    4. \u4e24\u4e2a\u7a97\u53e3\u8f93\u5165\u76f8\u540c\u7684\u623f\u95f4 ID
    \n \u70b9\u51fb"\u52a0\u5165\u623f\u95f4"<\/p>\n

    5. \u5141\u8bb8\u6444\u50cf\u5934\/\u9ea6\u514b\u98ce\u6743\u9650<\/p>\n

    6. \u89c2\u5bdf\u89c6\u9891\u901a\u8bdd\u662f\u5426\u5efa\u7acb<\/p>\n

    8.3 \u751f\u4ea7\u90e8\u7f72<\/h4>\n

    \/\/ \u4f7f\u7528 HTTPS (\u751f\u4ea7\u73af\u5883\u5fc5\u9700)<\/span>
    \nconst<\/span> https =<\/span> require<\/span>(<\/span>'https'<\/span>)<\/span>;<\/span>
    \nconst<\/span> fs =<\/span> require<\/span>(<\/span>'fs'<\/span>)<\/span>;<\/span><\/p>\n

    const<\/span> server =<\/span> https.<\/span>createServer<\/span>(<\/span>{<\/span>
    \n cert<\/span>:<\/span> fs.<\/span>readFileSync<\/span>(<\/span>'\/path\/to\/cert.pem'<\/span>)<\/span>,<\/span>
    \n key<\/span>:<\/span> fs.<\/span>readFileSync<\/span>(<\/span>'\/path\/to\/key.pem'<\/span>)<\/span>
    \n}<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u4f7f\u7528 wss:\/\/ \u8fde\u63a5<\/span>
    \nconst<\/span> wss =<\/span> new<\/span> WebSocket.<\/span>Server<\/span>(<\/span>{<\/span> server }<\/span>)<\/span>;<\/span><\/p>\n

    \n

    9. \u603b\u7ed3<\/h3>\n

    9.1 \u6838\u5fc3\u8981\u70b9<\/h4>\n\n\u7ec4\u4ef6\u529f\u80fd<\/tr>\n\n\n\n\n\n
    WebSocket<\/td>\n\u5b9e\u65f6\u53cc\u5411\u901a\u4fe1<\/td>\n<\/tr>\n
    RoomManager<\/td>\n\u623f\u95f4\u521b\u5efa\/\u52a0\u5165\/\u79bb\u5f00<\/td>\n<\/tr>\n
    MessageHandler<\/td>\n\u4fe1\u4ee4\u6d88\u606f\u8def\u7531<\/td>\n<\/tr>\n
    \u5ba2\u6237\u7aef<\/td>\nPeerConnection \u7ba1\u7406<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    9.2 \u6269\u5c55\u5efa\u8bae<\/h4>\n

    \u53ef\u6269\u5c55\u529f\u80fd:
    \n1. \u7528\u6237\u8ba4\u8bc1 (JWT)
    \n2. \u623f\u95f4\u5bc6\u7801
    \n3. \u5c4f\u5e55\u5171\u4eab
    \n4. \u6587\u5b57\u804a\u5929
    \n5. \u5f55\u5236\u529f\u80fd
    \n6. Redis \u96c6\u7fa4\u652f\u6301<\/p>\n

    9.3 \u4e0b\u4e00\u7bc7\u9884\u544a<\/h4>\n

    \u5728\u4e0b\u4e00\u7bc7\u6587\u7ae0\u4e2d,\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8 SFU \u67b6\u6784\u3002<\/p>\n

    \n

    \u53c2\u8003\u8d44\u6599<\/h3>\n
  • ws – WebSocket library<\/li>\n
  • WebRTC API<\/li>\n
    \n","protected":false},"excerpt":{"rendered":"

    \u6784\u5efa\u81ea\u5df1\u7684 WebRTC \u4fe1\u4ee4\u670d\u52a1\u5668 (Node.js \u5b9e\u6218) \u672c\u6587\u662f WebRTC \u7cfb\u5217\u4e13\u680f\u7684\u7b2c\u4e8c\u5341\u4e00\u7bc7,\u5c06\u624b\u628a\u624b\u6559\u4f60\u4f7f\u7528 Node.js \u6784\u5efa\u4e00\u4e2a\u5b8c\u6574\u7684 WebRTC \u4fe1\u4ee4\u670d\u52a1\u5668,\u5305\u62ec WebSocket \u901a\u4fe1\u3001\u623f\u95f4\u7ba1\u7406\u548c Offer\/Answer \u4ea4\u6362\u3002 \u76ee\u5f55
    \n\u4fe1\u4ee4\u670d\u52a1\u5668\u6982\u8ff0\u9879\u76ee\u7ed3\u6784WebSocket \u670d\u52a1\u5668\u623f\u95f4\u7ba1\u7406\u4fe1\u4ee4\u6d88\u606f\u5904\u7406\u5ba2\u6237\u7aef\u5b9e\u73b0\u5b8c\u6574\u4ee3\u7801\u90e8\u7f72\u4e0e\u6d4b\u8bd5\u603b\u7ed3 1. \u4fe1\u4ee4\u670d\u52a1\u5668\u6982\u8ff0
    \n1.1 \u4fe1\u4ee4\u670d\u52a1\u5668\u7684\u4f5c\u7528
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