--end--字符串转成二进制通过libwebsockets发送，用libwebsockets库，使用c如何实现 -Go服务器开发

在C语言中使用libwebsockets库将字符串”–end–“转换为二进制数据并通过WebSocket发送的示例代码如下：

#include <stdio.h>
#include <string.h>
#include <libwebsockets.h>

#define EXAMPLE_RX_BUFFER_BYTES (10)

static int callback_websockets(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len)
{
    switch (reason) {
        case LWS_CALLBACK_CLIENT_ESTABLISHED:
            lwsl_user("Connected to server\n");
            
            // 将字符串转换为二进制数据
            char binaryData[] = {0x2D, 0x2D, 0x65, 0x6E, 0x64, 0x2D, 0x2D};
            
            // 发送二进制数据
            lws_write(wsi, (unsigned char *)binaryData, sizeof(binaryData), LWS_WRITE_BINARY);
            break;
        
        default:
            break;
    }

    return 0;
}

int main(void)
{
    struct lws_context_creation_info info;
    struct lws_client_connect_info i;

    memset(&info, 0, sizeof info);
    
    info.port = CONTEXT_PORT_NO_LISTEN;
    info.protocols = NULL;

    struct lws_context *context = lws_create_context(&info);

    memset(&i, 0, sizeof(i));
    
    i.context = context;
    i.address = "your_server_address";
    i.port = 80; // WebSocket port
    i.path = "/";
    
     if (!lws_client_connect_via_info(&i)) {
         fprintf(stderr,"error with connect\n");
     }

     while(1) {
        if (lws_service(context , /* timeout_ms */10000000) < 0 )
              break; 

     }

     lws_context_destroy(context);

     return 0;
}

请注意，上述示例代码是一个简单的基于libwebsockets的客户端连接和发送二进制数据的实现。确保替换 your_server_address为正确的服务器地址，并根据需要进行适当的错误处理和调试。建议参考libwebsockets官方文档以获取更详细和全面的使用指导。

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