使用C语言实现一个简单的WebSocket server-Go服务器开发

以下是使用C语言实现一个简单的WebSocket服务器的基本示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>

#define MAX_CLIENTS 10
#define BUFFER_SIZE 1024

int main() {
    int serverSocket, clientSockets[MAX_CLIENTS], maxClients = MAX_CLIENTS;
    struct sockaddr_in serverAddress, clientAddress;
    char buffer[BUFFER_SIZE];

    // 创建服务器套接字
    if ((serverSocket = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("Failed to create socket");
        exit(1);
    }

    // 设置服务器地址和端口
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_addr.s_addr = INADDR_ANY;
    serverAddress.sin_port = htons(8080);

    // 绑定套接字到指定地址和端口
    if (bind(serverSocket, (struct sockaddr *)&serverAddress, sizeof(serverAddress)) == -1) {
        perror("Failed to bind socket");
        exit(1);
    }

    // 开始监听连接请求
    if (listen(serverSocket, maxClients) == -1) {
        perror("Error in listen");
        exit(1);
    }
    
    printf("WebSocket Server running on port 8080\n");

   while (1) {
       socklen_t clientLength = sizeof(clientAddress);
       int newSocket;

       // 等待客户端连接请求
       if ((newSocket = accept(serverSocket, (struct sockaddr *)&clientAddress,
                               &clientLength)) == -1) {
           perror("Error in accepting connection");
           exit(1);
       }

       printf("New connection accepted\n");

       // 接收和发送数据
       while (1) {
           memset(buffer, 0, BUFFER_SIZE);
           
           // 接收客户端发送的消息
           if (recv(newSocket, buffer, BUFFER_SIZE - 1, 0) == -1) {
               perror("Error in receiving data");
               exit(1);
           }

           printf("Received message: %s\n", buffer);

           // 发送回复消息给客户端
           const char *response = "Hello from WebSocket server!";
           if (send(newSocket, response, strlen(response), 0) == -1) {
               perror("Error in sending data");
               exit(1);
           }
       }
   }

   // 关闭套接字
   for (int i = 0; i < maxClients; i++) {
       close(clientSockets[i]);
   }
   close(serverSocket);

   return 0;
}

这只是一个简单示例，用于监听来自客户端的连接请求并发送回复消息。在实际应用中，您可能需要根据WebSocket协议规范处理更多细节，并实现WebSocket的握手过程、帧解析和数据处理等功能。

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