socket截屏c++

你可以使用以下代码来实现在 C 语言中使用 socket 进行截屏：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/sendfile.h>

#define PORT 8080
#define BUFFER_SIZE 1024

int main()
{
    int server_fd, new_socket;
    struct sockaddr_in address;
    int addrlen = sizeof(address);
    char buffer[BUFFER_SIZE];    
    // 创建 socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0)
    {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }
    
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);
    
    // 绑定地址和端口
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0)
    {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    
    // 监听连接
    if (listen(server_fd, 3) < 0)
    {
        perror("listen failed");
        exit(EXIT_FAILURE);
    }
    
    printf("Server listening on port %d\n", PORT);
    
    // 接受新的连接
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0)
    {
        perror("accept failed");
        exit(EXIT_FAILURE);
    }
    
    printf("Client connected\n");
    
    // 截屏并发送
    FILE* screenshot = popen("screencapture -x -t jpg", "r");
    if (screenshot == NULL)
    {
        perror("screencapture failed");
        exit(EXIT_FAILURE);
    }
    
    int screenshot_fd = fileno(screenshot);
    struct stat screenshot_stat;
    fstat(screenshot_fd, &screenshot_stat);
    off_t screenshot_size = screenshot_stat.st_size;
    
    // 发送文件大小
    sprintf(buffer, "%ld", screenshot_size);
    send(new_socket, buffer, strlen(buffer), 0);
    
    // 发送截屏文件
    sendfile(new_socket, screenshot_fd, NULL, screenshot_size);
    
    printf("Screenshot sent\n");
    
    // 清理资源
    pclose(screenshot);
    close(new_socket);
    close(server_fd);
    
    return 0;
}

这段代码实现了一个简单的服务器，在接受到连接后，会执行命令`screencapture -x -t jpg`进行截屏，并将截屏结果发送给客户端。请确保你的系统上安装了`screencapture`命令。

注意：此代码只是一个简单的示例，实际应用中可能需要添加错误处理和异常情况处理等功能。