关于Spring Boot WebSocket整合以及nginx配置详解

时间：2022-02-02 09:34:43|栏目：JAVA代码|点击：次

前言

本文主要给大家介绍了关于Spring Boot WebSocket整合及nginx配置的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

一：Spring Boot WebSocket整合

创建一个maven项目，加入如下依赖

<dependencyManagement> 
 <dependencies> 
  <dependency> 
   <groupId>org.springframework.boot</groupId> 
   <artifactId>spring-boot-dependencies</artifactId> 
   <version>1.4.0.RELEASE</version> 
   <scope>import</scope> 
   <type>pom</type> 
  </dependency> 
 </dependencies> 
</dependencyManagement> 
 
<dependencies> 
 <dependency> 
  <groupId>org.springframework.boot</groupId> 
  <artifactId>spring-boot-starter-web</artifactId> 
 </dependency> 
 <dependency> 
  <groupId>org.springframework.boot</groupId> 
  <artifactId>spring-boot-starter-websocket</artifactId> 
 </dependency> 
</dependencies>

代码如下：

package com.wh.web; 
 
import org.springframework.web.socket.TextMessage; 
import org.springframework.web.socket.WebSocketSession; 
import org.springframework.web.socket.handler.TextWebSocketHandler; 
 
public class CountWebSocketHandler extends TextWebSocketHandler { 
 
 private static long count = 0; 
 protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception { 
  session.sendMessage(new TextMessage("你是第" + (++count) + "位访客")); 
 } 
}

package com.wh.web; 
 
import org.springframework.context.annotation.Configuration; 
import org.springframework.web.socket.config.annotation.WebSocketConfigurer; 
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry; 
 
@Configuration 
public class WebsocketConfiguration implements WebSocketConfigurer { 
 public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) { 
  registry.addHandler(new CountWebSocketHandler(), "/web/count"); 
 } 
}

package com.wh.web; 
 
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.web.socket.config.annotation.EnableWebSocket; 
 
@EnableWebSocket 
@SpringBootApplication 
public class ServerApp { 
 public static void main(String[] args) { 
  SpringApplication.run(ServerApp.class, args); 
 } 
}

application.properties 内容如下：

server.port=9080 
spring.resources.static-locations=classpath:/webapp/html/

src/main/resources/webapp/html/index.html 内容如下：

<!DOCTYPE html> 
<html> 
<head> 
<meta charset="UTF-8" /> 
<title>web socket</title> 
</head> 
<body> 
<h1>web socket</h1> 
<script type="text/javascript"> 
 var url = 'ws://'+window.location.hostname+':9080/web/count'; 
 var ws = new WebSocket(url); 
 ws.onopen = function(event) 
 { 
  ws.send('hello'); 
 }; 
  
 ws.onmessage = function(event) { 
  alert(event.data); 
 }; 
  
 ws.onerror = function(event) { 
  alert(event); 
 } 
</script> 
</body> 
</html>

最后，启动main方法，访问http://127.0.0.1:9080/index.html即可看到输出

二：nginx配置

nginx 通过在客户端和后端服务器之间建立起一条隧道来支持WebSocket。

为了使nginx可以将来自客户端的Upgrade请求发送给后端服务器，Upgrade和Connection的头信息必须被显式的设置。如下所示：

location /web/count { 
  proxy_pass http://tomcat-server; 
  proxy_redirect off; 
  proxy_http_version 1.1; 
  proxy_set_header Upgrade $http_upgrade; 
  proxy_set_header Connection "upgrade"; 
  proxy_set_header Host $host:$server_port; 
  proxy_set_header X-Real-IP $remote_addr; 
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  
}

一旦我们完成以上设置，nginx就可以处理WebSocket连接了。

注意：必须要有 proxy_set_header Host $host:$server_port; 这个配置

否则，会报：WebSocket connection to 'ws://192.168.1.104:9080/web/count' failed: Error during WebSocket handshake: Unexpected response code: 403的错误

总结

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