springboot整合webSocket：鉴权，心跳检测，wss请求，nginx配置、集群部署
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1.首先pom引入websocket
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>SpringBoot和WebSocket是没有token鉴权的，需要自己定义实现WebSocket建立连接时的鉴权，websocket的实现方式就和一般博客看到的不一样了，本文自定义websocket配置：WebSocketConfig implements WebSocketConfigurer，
websocket的拦截器：CustomWebsocketInterceptor extends HttpSessionHandshakeInterceptor，
websocket的Handler：CustomWebSocketHandler extends TextWebSocketHandler
2.配置WebSocketConfig
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Resource
private CustomWebsocketInterceptor customWebsocketInterceptor;
@Resource
private CustomWebSocketHandler customWebSocketHandler;
@Bean
public ServerEndpointExporter serverEndpointExporter() {
return new ServerEndpointExporter();
}
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry
// 设置处理器处理/custom/**
.addHandler(customWebSocketHandler,"/wsTest/websocket")
// 允许跨越
.setAllowedOrigins("*")
// 设置监听器
.addInterceptors(customWebsocketInterceptor);
}
}建立连接的url
wss://websocket.test.com/wsTest/websocket
注意，使用wss调用需要在nginx配置ssl证书，否则部署到服务器是无法建立websocket连接的。
3.Nginx配置如下，
upstream wsTestServer {
ip_hash;
server 10.*.*.92:8008;
server 10.*.*.92:8008;
}
server {
# cloudflare
listen 80;
listen 443 ssl;
server_name websocket.test.com;
# 证书路径：
ssl_certificate /etc/nginx/cert/ssl-c.crt;
ssl_certificate_key /etc/nginx/cert/ssl-k.key;
ssl_session_cache shared:SSL:1m;
ssl_session_timeout 5m;
ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
location /wsTest/websocket {
proxy_pass http://wsTestServer;
proxy_set_header Host $host;
proxy_http_version 1.1;
proxy_set_header X-Client-IP $remote_addr;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_connect_timeout 60;
proxy_read_timeout 600;
#允许跨域请求的域，* 代表所有
add_header 'Access-Control-Allow-Origin' *;
#允许带上cookie请求
add_header 'Access-Control-Allow-Credentials' 'true';
#允许请求的方法，比如 GET/POST/PUT/DELETE
add_header 'Access-Control-Allow-Methods' *;
#允许请求的header
add_header 'Access-Control-Allow-Headers' *;
}
}
其中要监听listen 80端口，尤其注意的是要注意这下面2个配置必须加上，否则建立连接成功立刻就会断掉。
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
从nginx配置看，进行了负载均衡，服务进行了集群部署，项目部署在多台机器上，如此，当一个客户端用户和一台机器建立了链接，客户端自然是不会再去和其他机器建立连接，同时一般建立连接成功时，还会断开旧的连接，这样就不能和新的机器建立连接。
解决方案
1、使用消息中间件解决websocket session共享问题。
2、使用redis的发布订阅模式解决
我采用了方案2，
收到客户端发送到服务器发给接收者的消息时，
调用：
JSONObject obj = new JSONObject();
obj.put("title", "我是标题");
obj.put("smsContent","我是内容");
customWebSocketHandler.dealNodeSession(userId, obj); public void dealNodeSession(String uid, JSONObject message){
boolean isSendMessage = sendMessage(uid, message.toJSONString());
// 如果当前服务发送成功就不再同志其他服务订阅发送
if (isSendMessage){
log.info("连接对象【{}】在本服务发送消息",uid);
return;
}
log.info("连接对象【{}】在本服务未建立连接，通知其他服务发送消息",uid);
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("userId",uid);
jsonObject.put("message",message);
redisService.convertAndSend(RedisConstants.WETECH_REDIS_CHANNEL, jsonObject);
} catch (Exception e) {
log.error("dealNodeSession Exception: {}",e);
}
}4.Redis发布订阅的配置
@Configuration
public class MessageConfig {
/**
* 配置 RedisMessageListenerContainer 监听器容器
*
* @param connectionFactory 连接工厂
* @param listenerAdapter 消息侦听器适配器
* @return
*/
@Bean
public RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
MessageListenerAdapter listenerAdapter) {
RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
// 消息主题列表
List<Topic> topicList = new ArrayList<>();
// 订阅 “wsTopic” 频道
topicList.add(new ChannelTopic(RedisConstants.WETECH_REDIS_CHANNEL));
// 订阅 “wsTopic2” 模式
// topicList.add(new PatternTopic((RedisConstants.REDIS_CHANNEL2));
// 将消息侦听器添加到容器中
container.addMessageListener(listenerAdapter, topicList);
return container;
}
@Bean
MessageListenerAdapter listenerAdapter(RedisReceiver receiver) {
// 消息监听适配器
return new MessageListenerAdapter(receiver, "onMessage");
}
}5.Redis订阅监听
/**
* redis消息监听对象，接收订阅消息
*/
@Component
@Slf4j
public class RedisReceiver implements MessageListener {
@Autowired
private CustomWebSocketHandler customWebSocketHandler;
/**
* @param message
* @param pattern
*/
@Override
public void onMessage(Message message, byte[] pattern) {
// log.info("redisReceiver onMessage message: {}",message);
String channel = new String(message.getChannel());// 订阅的频道名称
String msg = "";
try {
msg = new String(message.getBody(), Constants.UTF8);//注意与发布消息编码一致，否则会乱码
if (!StringUtils.isEmpty(msg)) {
if (RedisConstants.WETECH_REDIS_CHANNEL.equals(channel)) { // 最新消息
String replaceAll = msg.replaceAll("\\\\", "");
JSONObject jsonObject = JSONObject.parseObject(replaceAll);
if (jsonObject == null) {
log.info("redisReceiver onMessage redisMessage is null");
return;
}
String userId = (String) jsonObject.get("userId");
JSONObject obj=jsonObject.getJSONObject("message");
log.info("redisReceiver onMessage userId: {}",userId);
customWebSocketHandler.sendMessage(userId, obj.toJSONString());
} else {
// 其他订阅的消息处理
}
} else {
log.info("redisReceiver onMessage msg is null");
}
} catch (Exception e) {
log.error("redisReceiver exception：" + e.toString());
}
}
}6.websocket的拦截器：CustomWebsocketInterceptor
/**
* @author wangchengfeng
* 用来处理webscocket拦截器
*/
@Component
@Slf4j
public class CustomWebsocketInterceptor extends HttpSessionHandshakeInterceptor {
@Autowired
private UserService userService;
/**
* 建立连接时
*
* @param request the current request
* @param response the current response
* @param wsHandler the target WebSocket handler
* @param attributes the attributes from the HTTP handshake to associate with the WebSocket
* session; the provided attributes are copied, the original map is not used.
* @return
* @throws Exception
*/
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler
, Map<String, Object> attributes) {
try {
ServletServerHttpRequest req = (ServletServerHttpRequest) request;
ServletServerHttpResponse res = (ServletServerHttpResponse) response;
String token = req.getServletRequest().getHeader("Sec-WebSocket-Protocol");
if (StringUtils.isBlank(token)) {
log.error("CustomWebsocketInterceptor beforeHandshake token is empty");
return false;
}
UserInfo model = userService.queryUserInfoByToken(token);
if (model == null) {
log.error("CustomWebsocketInterceptor beforeHandshake userInfoModel is empty");
return false;
}
attributes.put("userId", model.getUid());
log.info("attributes:{}", attributes);
//在后端握手时设置一下请求头（Sec-WebSocket-Protocol），前端发来什么授权值，这里就设置什么值，不设置会报错导致建立连接成功后立即被关闭
res.getServletResponse().setHeader("Sec-WebSocket-Protocol", token);
/**
* 鉴权: return false 不通过
* response.setStatusCode(HttpStatus.UNAUTHORIZED);
* return false;
*/
super.setCreateSession(true);
return super.beforeHandshake(request, response, wsHandler, attributes);
} catch (Exception e) {
log.info("beforeHandshake Exception:{}", e);
}
return false;
}
/**
* 成功建立连接后
*
* @param request the current request
* @param response the current response
* @param wsHandler the target WebSocket handler
* @param exception an exception raised during the handshake, or {@code null} if none
*/
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
Exception exception) {
log.info("连接成功....");
//其他业务代码
super.afterHandshake(request, response, wsHandler, exception);
}
}
7.websocket的处理器CustomWebSocketHandler
@Slf4j
@Component
public class CustomWebSocketHandler extends TextWebSocketHandler {
@Autowired
private RedisService redisService;
/**
* 当前websocket连接集合
*/
public static final ConcurrentHashMap<String, WebSocketSession> WEB_SOCKET_SESSION_MAP = new ConcurrentHashMap<>();
/**
* 收到客户端消息时触发的回调
*
* @param session 连接对象
* @param message 消息体
*/
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) {
log.info("接受到消息【{}】的消息：{}", session.getId(), message.getPayload());
String messagePayload = message.getPayload();
JSONObject jsonObject = JSONObject.parseObject(messagePayload);
if (jsonObject != null && jsonObject.get("wsMsgType").equals("heartBeat")) {
String uid = (String) jsonObject.get("uid");
JSONObject obj = new JSONObject();
obj.put("heartBeatResult", "done");
dealNodeSession(uid, obj);
}
}
/**
* 建立连接后触发的回调
*
* @param session 连接对象
* @throws Exception
*/
@Override
public void afterConnectionEstablished(WebSocketSession session) {
try {
String sessionId = getSessionId(session);
if (StringUtils.isBlank(sessionId)){
log.error("建立了连接时 sessionId is null");
return;
}
// 如果存在则断开连接
if (WEB_SOCKET_SESSION_MAP.containsKey(sessionId)) {
WEB_SOCKET_SESSION_MAP.get(sessionId).close();
WEB_SOCKET_SESSION_MAP.remove(sessionId);
}
// 将新连接添加
WEB_SOCKET_SESSION_MAP.put(sessionId, session);
log.debug("与【{}】建立了连接", sessionId);
//sendMessage(sessionId, sessionId);
log.debug("attributes:{}", session.getAttributes());
} catch (IOException e) {
log.error("建立连接后触发的回调【{}】,status:{}", getSessionId(session));
}
}
/**
* 断开连接后触发的回调
*
* @param session 连接对象
* @param status 状态
* @throws Exception 异常
*/
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
log.info("连接对象【{}】断开连接,status:{}", getSessionId(session), status.getCode());
try {
String sessionId = getSessionId(session);
if (StringUtils.isBlank(sessionId)){
return;
}
// 关闭连接
session.close(CloseStatus.SERVER_ERROR);
// 删除对象
WEB_SOCKET_SESSION_MAP.remove(sessionId);
} catch (IOException e) {
log.error("连接对象【{}】断开连接,IOException :{}", e);
}
}
/**
* 传输消息出错时触发的回调
*
* @param session 连接对象
* @param exception 异常
* @throws Exception 异常
*/
@Override
public void handleTransportError(WebSocketSession session, Throwable exception) {
log.info("连接对象【{}】发生错误,exception:{}", session.getId(), exception.getMessage());
// 如果发送异常，则断开连接
String sessionId = getSessionId(session);
if (StringUtils.isBlank(sessionId)){
log.error("建立了连接时 sessionId is null");
return;
}
try {
if (session.isOpen()) {
session.close();
WEB_SOCKET_SESSION_MAP.remove(sessionId);
}
} catch (IOException e) {
log.error("连接对象【{}】发生错误,IOException :{}", e);
}
}
/**
* 自定义判断 sessionId
*
* @param session 连接对象
* @return sessionId
*/
private String getSessionId(WebSocketSession session) {
return (String) session.getAttributes().get("userId");
}
public void dealNodeSession(String uid, JSONObject message){
boolean isSendMessage = sendMessage(uid, message.toJSONString());
// 如果当前服务发送成功就不再同志其他服务订阅发送
if (isSendMessage){
log.info("连接对象【{}】在本服务发送消息",uid);
return;
}
log.info("连接对象【{}】在本服务未建立连接，通知其他服务发送消息",uid);
try {
JSONObject jsonObject = new JSONObject();
jsonObject.put("userId",uid);
jsonObject.put("message",message);
redisService.convertAndSend(RedisConstants.WETECH_REDIS_CHANNEL, jsonObject);
} catch (Exception e) {
log.error("dealNodeSession Exception: {}",e);
}
}
/**
* 发送消息
*
* @param sessionId 对象id
* @param message 消息
* @throws IOException IO
*/
public boolean sendMessage(String sessionId, String message) {
WebSocketSession webSocketSession = WEB_SOCKET_SESSION_MAP.get(sessionId);
if (webSocketSession == null) {
log.error("连接对象【{}】未在该服务建立连接，不发送消息{}", sessionId,message);
return false;
}
if (!webSocketSession.isOpen()) {
log.error("连接对象【{}】已关闭 无法送消息：{}", sessionId, message);
return false;
} else {
try {
webSocketSession.sendMessage(new TextMessage(message));
log.info("sendMessage：向{}发送消息", sessionId);
return true;
} catch (IOException e) {
log.error("sendMessage IOException：向{}发送消息：{}", sessionId, message);
return false;
}
}
}
/**
* 获取所有的连接对象ID
*
* @return ids
*/
public List<String> getSessionIds() {
Enumeration<String> keys = WEB_SOCKET_SESSION_MAP.keys();
List<String> ks = new ArrayList<>();
while (keys.hasMoreElements()) {
ks.add(keys.nextElement());
}
return ks;
}
}
8.向接收者发送websocket通知
@RestController
@RequestMapping("/chat")
@Slf4j
public class ChatController {
@Resource
private CustomWebSocketHandler customWebSocketHandler;
/**
* 添加聊天记录,web
*/
@PostMapping("/add/record")
public void addChatRecord(@RequestBody AddChatRecordDto dto) {
JSONObject obj = new JSONObject();
obj.put("chatDialogResult", dto);
customWebSocketHandler.dealNodeSession(dto.getUid(), obj);
}
}
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