一：Spring Boot WebSocket整合
創建一個maven項目，加入如下依賴
<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>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) + "位訪客"));
}
}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);
}
}server.port=9080
spring.resources.static-locations=classpath:/webapp/html/<!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>最後，啓動main方法，訪問http://127.0.0.1:9080/index.html即可看到輸出
二：nginx配置
nginx 通過在客戶端和後端服務器之間建立起一條隧道來支持WebSocket。
爲了使nginx可以將來自客戶端的Upgrade請求發送給後端服務器，Upgrade和Connection的頭信息必須被顯式的設置。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;
}一旦我們完成以上設置，nginx就可以處理WebSocket連接了。
注意，必須要有
proxy_set_header Host $host:$server_port;
這個配置
否則，會報：
WebSocket connection to 'ws://192.168.1.104:9080/web/count' failed: Error during WebSocket handshake: Unexpected response code: 403
的錯誤