2024-09-02



import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.*;
 
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
 
    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(myHandler(), "/myWebSocket")
                .setAllowedOrigins("*");
    }
 
    @Bean
    public WebSocketHandler myHandler() {
        // 实现自定义的WebSocketHandler
        return new MyCustomWebSocketHandler();
    }
}

这个代码示例展示了如何在Spring Boot应用程序中配置WebSocket。首先,我们使用@EnableWebSocket注解启用WebSocket支持。然后,我们实现了WebSocketConfigurer接口,在registerWebSocketHandlers方法中注册了一个WebSocket处理器MyCustomWebSocketHandler,它处理路径为/myWebSocket的WebSocket连接,并设置允许来自任何源的跨域请求。

2024-09-02



import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.*;
 
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
 
    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(myHandler(), "/my-websocket-endpoint")
            .setAllowedOrigins("*"); // 允许所有域进行WebSocket连接
    }
 
    @Bean
    public WebSocketHandler myHandler() {
        // 实现自定义的WebSocketHandler
        return new MyCustomWebSocketHandler();
    }
}

在这个配置类中,我们定义了一个WebSocket的端点/my-websocket-endpoint,并且指定了一个自定义的WebSocket处理器MyCustomWebSocketHandler。我们还通过.setAllowedOrigins("*")允许所有域进行WebSocket连接,这样可以避免跨域问题。在实际应用中,应该根据具体需求设置允许的域,而不是使用 "*"

2024-09-02



import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.*;
 
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        registry.addHandler(myHandler(), "/myWebSocket")
            .setAllowedOrigins("*");
    }
 
    @Bean
    public WebSocketHandler myHandler() {
        // 实现自定义的WebSocketHandler
        return new MyCustomWebSocketHandler();
    }
}
 
// 自定义的WebSocket处理器
public class MyCustomWebSocketHandler implements WebSocketHandler {
    // 实现WebSocketHandler相关的方法
    // ...
}

这个代码示例展示了如何在Spring Boot应用程序中配置和注册一个自定义的WebSocket处理器。首先,我们创建了一个实现了WebSocketConfigurer接口的配置类。在这个类中,我们注册了一个指向/myWebSocket路径的处理器,并设置了允许来自任何origin的WebSocket连接。然后,我们定义了一个名为MyCustomWebSocketHandler的类,该类实现了WebSocketHandler接口,并且可以处理WebSocket的消息接收、发送等逻辑。

2024-09-02

在Python中,创建一个简单的WebSocket负载均衡器可以使用websocketsasyncio库。以下是一个简化的例子:




import asyncio
import websockets
 
async def echo(websocket, path):
    async for message in websocket:
        await websocket.send(message)
 
async def balancer(sockets):
    async with asyncio.wait(sockets) as waiter:
        while True:
            done, pending = await asyncio.wait(pending, timeout=None)
            for coro in done:
                try:
                    websocket, path = await coro
                except Exception as e:
                    print(f"Error: {e}")
                    continue
                else:
                    await handle_connection(websocket, path)
 
start_server = websockets.serve(balancer, "localhost", 8765)
asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()

这个例子中,balancer函数负责启动与所有后端服务的WebSocket连接,并在接收到消息时将其转发到每个连接。echo函数是一个示例处理程序,实际应用中你可能需要替换为你的业务逻辑。

要实现真正的负载均衡,你还需要一个服务发现机制来动态管理后端服务的IP和端口。这通常涉及到一个服务目录或注册中心,如Consul, Etcd, Zookeeper等。

这个例子只是提供了负载均衡器的基本框架。实际应用中,你需要根据你的具体需求来扩展和完善它。

2024-09-02

以下是一个使用Spring Boot整合WebSocket的简单示例,实现了前后端实时通信的功能。

后端代码(Spring Boot):




import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.*;
 
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }
 
    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/ws").withSockJS();
    }
}
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
 
@Controller
public class HomeController {
    @GetMapping("/")
    @ResponseBody
    public String home() {
        return "Welcome to WebSocket Chat!";
    }
}
 
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
 
@Controller
public class WebSocketController {
    @MessageMapping("/chat.sendMessage")
    @SendTo("/topic/public")
    public ChatMessage sendMessage(ChatMessage message) {
        return message;
    }
}
 
class ChatMessage {
    private String content;
    // getters and setters
}

前端代码(HTML + JavaScript):




<!DOCTYPE html>
<html>
<head>
    <title>WebSocket Chat</title>
    <script src="https://cdn.jsdelivr.net/npm/sockjs-client@1.7.0/dist/sockjs.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/stompjs@2.3.3/stomp.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script>
</head>
<body>
    <div>
        <input type="text" id="name" placeholder="Your Name" />
        <button id="connect">Connect</button>
        <button id="disconnect">Disconnect</button>
        <input type="text" id="message" placeholder="Message" />
        <button id="send">Send Message</button>
        <div id="conversationDiv">
            <label for="conversation">Conversation:</label>
            <textarea id="conversation" rows="4" cols="50"></textarea>
        </div>
    </div>
    <script>
        var stompClient = null;
        $('#con
2024-09-02

在Spring Boot中,你可以通过实现HandshakeInterceptor接口来获取WebSocket客户端的IP地址。以下是一个简单的例子:




import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;
 
import java.util.Map;
 
public class WebSocketHandshakeInterceptor implements HandshakeInterceptor {
 
    @Override
    public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
                                   Map<String, Object> attributes) throws Exception {
        // 获取客户端IP地址
        String clientIP = request.getRemoteAddress().getAddress().getHostAddress();
        attributes.put("clientIP", clientIP);
        return true; // 继续握手
    }
 
    @Override
    public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
                               Exception ex) {
        // 握手后的操作
    }
}

然后,你需要将这个拦截器注册到Spring的WebSocket配置中:




import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
 
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
 
    @Override
    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
        // 注册WebSocket拦截器
        registry.addHandler(myWebSocketHandler(), "/websocket-endpoint")
                .addInterceptors(new WebSocketHandshakeInterceptor());
    }
 
    // 你的WebSocketHandler定义
    private MyWebSocketHandler myWebSocketHandler() {
        return new MyWebSocketHandler();
    }
}

在你的WebSocketHandler实现中,你可以通过attributes.get("clientIP")来获取客户端IP地址:




import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
 
import java.util.Map;
 
public class MyWebSocketHandler extends Te
2024-09-02



from django.shortcuts import render
from channels.generic.websocket import WebsocketConsumer
import json
 
# 简单的Websocket生命周期示例
class ChatConsumer(WebsocketConsumer):
    def connect(self):
        self.accept()  # 接受WebSocket连接
 
    def receive(self, text_data=None, bytes_data=None):
        text_data_json = json.loads(text_data)
        message = text_data_json['message']
 
        # 示例:将接收到的消息发送回客户端
        self.send(text_data=json.dumps({
            'message': message,
        }))
 
    def disconnect(self, close_code):
        pass  # 可以在这里处理断开连接的逻辑
 
# 在URL配置中使用ChatConsumer
from django.urls import path
from .consumers import ChatConsumer
 
websocket_urlpatterns = [
    path('ws/chat/', ChatConsumer.as_asgi()),
]

这个示例展示了如何在Django中创建一个简单的WebSocket处理类,并在视图函数中使用它。它接受WebSocket连接,并将接收到的文本数据发送回客户端。这个例子是基于Django Channels库,它是Django的一个第三方扩展,专门用于处理WebSocket和其他异步HTTP请求。

2024-09-02

以下是一个简单的Spring Boot集成WebSocket的示例。这个示例包括了一个简单的WebSocket服务端和客户端。

服务端代码:




import org.springframework.stereotype.Component;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
 
@Component
public class WebSocketHandler extends TextWebSocketHandler {
 
    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        // 连接建立后的处理逻辑
    }
 
    @Override
    protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
        // 处理接收到的消息
        System.out.println("Received message: " + message.getPayload());
        // 可以选择向客户端发送消息
        session.sendMessage(new TextMessage("Server received: " + message.getPayload()));
    }
}

客户端代码:




import org.springframework.web.socket.WebSocketHttpHeaders;
import org.springframework.web.socket.client.standard.StandardWebSocketClient;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.handler.TextWebSocketHandler;
 
import java.net.URI;
 
public class WebSocketClient {
 
    public static void main(String[] args) throws Exception {
        URI uri = new URI("ws://localhost:8080/websocket"); // 替换为你的WebSocket服务端地址
        WebSocketHttpHeaders headers = new WebSocketHttpHeaders();
        // 可以添加认证头部等
        WebSocketClient client = new StandardWebSocketClient();
        WebSocketHandler handler = new TextWebSocketHandler() {
            @Override
            public void afterConnectionEstablished(WebSocketSession session) throws Exception {
                // 连接建立后的处理逻辑
                session.sendMessage(new TextMessage("Hello from client"));
            }
 
            @Override
            protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
                // 处理接收到的服务端消息
                System.out.println("Received message: " + message.getPayload());
            }
        };
 
        WebSocketSession session = client.doHandshake(handler, uri, headers).get();
        // 这里可以继续发送消息或者等待关闭
        // session.sendMessage(new TextMessage("Hello again"));
        // 等待关闭或者其他逻辑
    }
}

在这个例子中,服务端使用了TextWebSocketHandler来处理消息,并打印接收到的消息。客户端连接到服务端

2024-09-02

为了提供一个简洁的解决方案,我们需要假设已经有了接入讯飞星火平台的相关凭证和API接口的正确使用方式。以下是整合过程的核心步骤和代码示例:

  1. 添加所需依赖到pom.xml



<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 如果需要用到JSON解析,可以添加Jackson依赖 -->
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
</dependency>
  1. 创建一个服务类来封装发送消息的逻辑:



import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
 
@Service
public class ChatXunFeiService {
 
    private String url = "http://api.xfyun.cn/v1/message"; // 声明接口URL
    private String appId = "your_app_id"; // 你的应用ID
    private String apiKey = "your_api_key"; // 你的API密钥
 
    public String sendMessage(String to, String message) {
        // 使用RestTemplate发送POST请求
        RestTemplate restTemplate = new RestTemplate();
        // 创建请求参数
        MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
        params.add("to", to);
        params.add("text", message);
        // 设置请求头
        HttpHeaders headers = new HttpHeaders();
        headers.set("App-ID", appId);
        headers.set("API-Key", apiKey);
        // 创建请求实体
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);
        // 发送POST请求
        String response = restTemplate.postForObject(url, requestEntity, String.class);
        return response;
    }
}
  1. 创建一个控制器来提供发送消息的API接口:



import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
 
@RestController
public class ChatController {
 
    @Autowired
    private ChatXunFeiService chatXunFeiService;
 
    @PostMapping("/sendMessage")
    public String sendMessage(@RequestParam("to") String to, @RequestParam("message") String message) {
        return chatXunFeiService.sendMessage(to, message);
    }
}
  1. 配置应用并启动Spring Boot应用。

以上代码提供了一个简单的示例,展示了如何在Spring Boot应用中集成通过API接口进行聊天的功能。这个示例假设你已经有了与讯飞星火平台的接口协议和认证方式的详细信息。在实际使用时,你需要替换相应的your_app_idyour_api_key为你的实际凭证,并确保你的Spring Boot应用配置正确,包括端口和必要的参数设置。

2024-09-02

以下是一个使用Spring Cloud和Netty来实现WebSocket的简单示例。

首先,添加依赖到你的pom.xml




<dependencies>
    <!-- Spring Boot Web Starter -->
    <dependency>
        <groupId>org.springframework.boot</groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
 
    <!-- Netty -->
    <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty-all</artifactId>
        <version>4.1.69.Final</version>
    </dependency>
</dependencies>

然后,创建一个Netty WebSocket服务器端:




import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
 
public class NettyWebSocketServer {
 
    private int port;
 
    public NettyWebSocketServer(int port) {
        this.port = port;
    }
 
    public void run() throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
             .channel(NioServerSocketChannel.class)
             .handler(new LoggingHandler(LogLevel.INFO))
             .childHandler(new ChannelInitializer<SocketChannel>() {
                 @Override
                 public void initChannel(SocketChannel ch) throws Exception {
                     ChannelPipeline pipeline = ch.pipeline();
                     pipeline.addLast("http-codec", new HttpServerCodec());
                     pipeline.addLast("aggregator", new HttpObjectAggregator(65536));
                     pipeline.addLast("handler", new WebSocketServerHandler());
                 }
             });
 
            Channel ch = b.bind(port).sync().channel();
            System.out.println("Web socket server started at port " + port + '.');
            ch.closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
 
    public static void main(String[]