springboot整合 netty和websocket实现音视频通话的前后端代码
时间: 2023-06-14 12:04:54 浏览: 268
springboot基础netty和websocket
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以下是一个简单的 Spring Boot 整合 Netty 和 WebSocket 实现音视频通话的前后端代码示例:
前端代码(HTML + JavaScript):
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Video Chat</title>
<style>
#localVideo, #remoteVideo {
width: 320px;
height: 240px;
}
</style>
</head>
<body>
<video id="localVideo" autoplay muted></video>
<video id="remoteVideo" autoplay></video>
<script>
var localVideo = document.querySelector('#localVideo');
var remoteVideo = document.querySelector('#remoteVideo');
var peerConnection;
navigator.mediaDevices.getUserMedia({ video: true, audio: true })
.then(function (stream) {
localVideo.srcObject = stream;
peerConnection = new RTCPeerConnection();
peerConnection.addStream(stream);
peerConnection.onaddstream = function(event) {
remoteVideo.srcObject = event.stream;
};
peerConnection.onicecandidate = function(event) {
if (event.candidate) {
sendIceCandidate(event.candidate);
}
};
startCall();
})
.catch(function (err) {
console.log('getUserMedia error:', err);
});
function startCall() {
// 发送一个开始通话的消息给服务器
var socket = new WebSocket('ws://localhost:8080/videochat');
socket.onopen = function () {
socket.send(JSON.stringify({ type: 'start' }));
};
socket.onmessage = function (event) {
var message = JSON.parse(event.data);
if (message.type === 'offer') {
peerConnection.setRemoteDescription(new RTCSessionDescription(message.offer))
.then(function () {
return peerConnection.createAnswer();
})
.then(function (answer) {
return peerConnection.setLocalDescription(answer);
})
.then(function () {
socket.send(JSON.stringify({ type: 'answer', answer: peerConnection.localDescription }));
})
.catch(function (err) {
console.log(err);
});
}
else if (message.type === 'iceCandidate') {
peerConnection.addIceCandidate(new RTCIceCandidate(message.iceCandidate))
.catch(function (err) {
console.log(err);
});
}
};
}
function sendIceCandidate(candidate) {
// 发送一个 ICE candidate 到服务器
var socket = new WebSocket('ws://localhost:8080/videochat');
socket.onopen = function () {
socket.send(JSON.stringify({ type: 'iceCandidate', iceCandidate: candidate }));
};
}
</script>
</body>
</html>
```
后端代码(Java + Netty):
```java
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(videoChatHandler(), "/videochat").setAllowedOrigins("*");
}
@Bean
public WebSocketHandler videoChatHandler() {
return new VideoChatHandler();
}
}
public class VideoChatHandler extends TextWebSocketHandler {
private static final Logger logger = LoggerFactory.getLogger(VideoChatHandler.class);
private Session session;
private RTCPeerConnection peerConnection;
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
logger.info("WebSocket connection established");
this.session = session;
}
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
String json = (String) message.getPayload();
JsonObject jsonObject = new JsonParser().parse(json).getAsJsonObject();
String type = jsonObject.get("type").getAsString();
if ("start".equals(type)) {
startCall();
}
else if ("offer".equals(type)) {
String sdp = jsonObject.get("offer").getAsString();
SessionDescription offer = new SessionDescription(Type.OFFER, sdp);
peerConnection.setRemoteDescription(offer);
createAnswer();
}
else if ("answer".equals(type)) {
String sdp = jsonObject.get("answer").getAsString();
SessionDescription answer = new SessionDescription(Type.ANSWER, sdp);
peerConnection.setLocalDescription(answer);
sendAnswer();
}
else if ("iceCandidate".equals(type)) {
JsonObject iceCandidateJson = jsonObject.get("iceCandidate").getAsJsonObject();
IceCandidate iceCandidate = new IceCandidate(iceCandidateJson.get("sdpMid").getAsString(),
iceCandidateJson.get("sdpMLineIndex").getAsInt(), iceCandidateJson.get("candidate").getAsString());
peerConnection.addIceCandidate(iceCandidate);
}
}
private void startCall() {
peerConnection = new RTCPeerConnection();
peerConnection.addStream(getMediaStream());
peerConnection.setIceCandidateListener(new IceCandidateListener() {
@Override
public void onIceCandidate(IceCandidate iceCandidate) {
JsonObject message = new JsonObject();
message.addProperty("type", "iceCandidate");
JsonObject iceCandidateJson = new JsonObject();
iceCandidateJson.addProperty("sdpMid", iceCandidate.getSdpMid());
iceCandidateJson.addProperty("sdpMLineIndex", iceCandidate.getSdpMLineIndex());
iceCandidateJson.addProperty("candidate", iceCandidate.getCandidate());
message.add("iceCandidate", iceCandidateJson);
try {
session.sendMessage(new TextMessage(message.toString()));
} catch (IOException e) {
logger.error("Error sending ICE candidate", e);
}
}
});
createOffer();
}
private void createOffer() {
peerConnection.createOffer(new CreateSessionDescriptionObserver() {
@Override
public void onSuccess(SessionDescription sessionDescription) {
peerConnection.setLocalDescription(sessionDescription);
sendOffer();
}
@Override
public void onFailure(Throwable throwable) {
logger.error("Error creating offer", throwable);
}
}, new MediaConstraints());
}
private void sendOffer() {
JsonObject message = new JsonObject();
message.addProperty("type", "offer");
message.addProperty("offer", peerConnection.getLocalDescription().description);
try {
session.sendMessage(new TextMessage(message.toString()));
} catch (IOException e) {
logger.error("Error sending offer", e);
}
}
private void createAnswer() {
peerConnection.createAnswer(new CreateSessionDescriptionObserver() {
@Override
public void onSuccess(SessionDescription sessionDescription) {
peerConnection.setLocalDescription(sessionDescription);
sendAnswer();
}
@Override
public void onFailure(Throwable throwable) {
logger.error("Error creating answer", throwable);
}
}, new MediaConstraints());
}
private void sendAnswer() {
JsonObject message = new JsonObject();
message.addProperty("type", "answer");
message.addProperty("answer", peerConnection.getLocalDescription().description);
try {
session.sendMessage(new TextMessage(message.toString()));
} catch (IOException e) {
logger.error("Error sending answer", e);
}
}
private MediaStream getMediaStream() {
MediaStream mediaStream = new MediaStream();
MediaConstraints constraints = new MediaConstraints();
MediaStreamTrack videoTrack = getVideoTrack();
mediaStream.addTrack(videoTrack);
MediaStreamTrack audioTrack = getAudioTrack();
mediaStream.addTrack(audioTrack);
return mediaStream;
}
private MediaStreamTrack getVideoTrack() {
VideoCaptureModule videoCaptureModule = new VideoCaptureModule();
VideoCapturer videoCapturer = new Camera2Enumerator(VideoChatHandler.this.getContext()).createCapturer("0", null);
VideoSource videoSource = peerConnection.createVideoSource(videoCapturer, new MediaConstraints());
VideoTrack videoTrack = peerConnection.createVideoTrack("video", videoSource);
videoCapturer.startCapture(320, 240, 30);
return videoTrack;
}
private MediaStreamTrack getAudioTrack() {
AudioSource audioSource = peerConnection.createAudioSource(new MediaConstraints());
AudioTrack audioTrack = peerConnection.createAudioTrack("audio", audioSource);
return audioTrack;
}
}
```
其中,`VideoChatHandler` 类是 Netty 的 `WebSocketHandler` 的实现,用于处理 WebSocket 消息。在 `afterConnectionEstablished` 方法中,保存了 WebSocketSession 的引用。在 `handleMessage` 方法中,处理各种消息类型,包括开始通话、发送 offer、发送 answer、发送 ICE candidate 等。在 `startCall` 方法中,创建了一个 `RTCPeerConnection` 对象,并且添加了本地的媒体流。在 `createOffer` 方法中,创建了一个 offer,并设置为本地的 SDP。在 `sendOffer` 方法中,将 offer 发送给客户端。在 `createAnswer` 方法中,创建了一个 answer,并设置为本地的 SDP。在 `sendAnswer` 方法中,将 answer 发送给客户端。在 `getMediaStream` 方法中,创建了一个媒体流,包括视频和音频轨道。在 `getVideoTrack` 方法中,创建了一个视频轨道,使用了 Android 的 Camera2 API。在 `getAudioTrack` 方法中,创建了一个音频轨道。最后,通过 `WebSocketHandlerRegistry` 注册了 `VideoChatHandler`。
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