socket传图片

//client.cpp
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define BUF_SIZE 1024
//typedef struct Image
//{
    //int time;
    //char name[10];
    
    
//}Image;
int main(){

     //先输入文件名，看文件是否能创建成功
    char filename[100] = "recv.jpg";  //文件名
 
    FILE *fp = fopen(filename, "wb");  //以二进制方式打开（创建）文件
    if(fp == NULL){
        printf("Cannot open file, press any key to exit!\n");
        system("pause");
        exit(0);
    }
    //向服务器（特定的IP和端口）发起请求
    struct sockaddr_in serv_addr;
    memset(&serv_addr, 0, sizeof(serv_addr));  //每个字节都用0填充
    serv_addr.sin_family = AF_INET;  //使用IPv4地址
    serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
    serv_addr.sin_port = htons(1234);  //端口

     //创建套接字
    int sock = socket(AF_INET, SOCK_STREAM, 0);   
    connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr));//发送请求
  
    //读取服务器传回的数据
    char buffer[BUF_SIZE]={0};
    int nCount;
    while( (nCount = recv(sock, buffer, BUF_SIZE,0)) > 0)
    {
        fwrite(buffer,nCount,1,fp);
    }
    puts("file transfer success!");
    fclose(fp);
    
    //关闭套接字
    close(sock);

    return 0;
}

 

 

//server.cpp
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>//struct sockaddr_in
#include <sys/socket.h>
#include <netinet/in.h>
#define BUF_SIZE 1024
int main(){
     char const*filename="send.jpg";
    FILE *fp=fopen(filename,"rb");
    if(fp == NULL)
    {
        printf("Cannot open file, press any key to exit!\n");
        system("pause");
        exit(0);
    }
    //创建套接字
    int serv_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    //将套接字和IP、端口绑定
    struct sockaddr_in serv_addr;//IP地址和端口设置
    memset(&serv_addr, 0, sizeof(serv_addr));  //每个字节都用0填充
    serv_addr.sin_family = AF_INET;  //使用IPv4地址 (地址族，IPv4 or IPv6：AF_INET6)
    serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的32位IP地址，inet_addr将一个IP字符串转化为一个网络字节序的整数值,反向操作inet_ntoa()
    serv_addr.sin_port = htons(1234);  //端口号
    //将套接字serv_sock将IP地址和端口绑定
    bind(serv_sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
    //进入监听状态，等待用户发起请求
    listen(serv_sock, 20);
    //接收客户端请求
    struct sockaddr_in clnt_addr;
    socklen_t clnt_addr_size = sizeof(clnt_addr);

 
    //程序被阻塞，直到客户端发起请求
    int clnt_sock = accept(serv_sock, (struct sockaddr*)&clnt_addr, &clnt_addr_size);
    //向客户端发送数据
    char buffer[BUF_SIZE] = {0};
    int nCount;
    //write(clnt_sock, str, sizeof(str));
    while((nCount = fread(buffer,1,BUF_SIZE,fp)) > 0)
    {
        send(clnt_sock,buffer,nCount,0);
    }
    shutdown(clnt_sock,SHUT_WR);
    recv(clnt_sock,buffer,BUF_SIZE,0);
    fclose(fp);
    
    //关闭套接字
    close(clnt_sock);
    
    
    close(serv_sock);
    return 0;
}

 

 

json:

https://www.h5w3.com/245029.html

c++:

https://blog.csdn.net/Keep_Trying_Go/article/details/119575632

python opencv:

https://blog.csdn.net/weixin_45885074/article/details/112661063

python :

https://blog.csdn.net/qq_24282081/article/details/106498871