Question

我正在使用客户端 - 服务器通信来传输图像，当我从我的相机捕获图像时，它是一个rgb数组，我使用imencode编码为jpeg格式。

vector<unsigned char>buff;
imencode(".jpg",img,buff);

如何将其发送到客户端并将该数据保存到.jpg文件？

简单的服务器端 -

#include <stdio.h>
#include <string.h>
#include <sstream>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<fstream>
#include<errno.h>

int main(int argc , char **argv)
{
    int socket_desc , new_socket , read_size , c , buffer = 0  , n = 0; 
    struct sockaddr_in server , client ; 
    socket_desc = socket(AF_INET , SOCK_STREAM , 0) ; 
    server.sin_family = AF_INET ; 
    server.sin_addr.s_addr = INADDR_ANY ; 
    server.sin_port = htons(8000) ; 
    if(bind(socket_desc , (struct sockaddr *)&server , sizeof(server))<0)
    { 
        puts("bind failed") ; 
        return 1; 
    }
    puts("Binding was done now waiting for an incoming client") ; 
    listen(socket_desc , 3) ; 
    c = sizeof(struct sockaddr_in); 
    if((new_socket = accept(socket_desc , (struct sockaddr *)&client ,  
(socklen_t*)&c)))
    {
        puts("accepted your connection request") ; 
    }
    fflush(stdout) ; 

    if(new_socket<0)
    {
        puts("Looks like connection with cliento was not a success"); 
    }
    image = cv::imread("a.jpg") ; 
    std::vector<uchar> buff ; 
    cv::imencode(".jpg" , image , buff) ; 

    // Sending a normal mssg instead of jpeg data 
    char send[] = {'a' , 'b' , 'c'} ; 
    n = write(new_socket , send , 10) ; 

    if(n<0)
    {
        puts("Looks like there was an error while writing to client") ; 
    }

    close(socket_desc); 
    return 0 ; 
}

客户端 -

#include<stdio.h> 
#include<string.h>
#include<sys/socket.h>
#include<arpa/inet.h>   
#include<sys/ioctl.h>
#include<unistd.h>  
#include<iostream>
#include<fstream>
#include<errno.h>

int main(int argc , char *argv[])
{
    // variable initialization 
    int socket_desc , n = 0;
    struct sockaddr_in server;
    char *parray;
    char buffer[256];
    // creating a socket 
    socket_desc = socket(AF_INET , SOCK_STREAM , 0);
    if (socket_desc == -1) {
        printf("Socket couldn't be created");
    }

    // do servo initialization 
    memset(&server,0,sizeof(server));
    server.sin_addr.s_addr = inet_addr("192.168.137.3");
    server.sin_family = AF_INET;
    server.sin_port = htons( 8000 );

    // Finally connect to servo 
    if (connect(socket_desc , (struct sockaddr *)&server , sizeof(server)) < 0) 
    {
        cout<<strerror(errno);
        close(socket_desc);
        puts("There was a connection error with server");
        return 1;
    }
    puts("Successfully got connected with server") ; 
    n = read(socket_desc,buffer,255);

    if (n < 0) {
        perror("There was an error reading from server");
        exit(1);
    }

    printf("Here is the message from server: %s\n",buffer);
    close(socket_desc) ; 
    return 0 ; 
 }

当客户端发送请求时，我需要做的就是捕获RGB格式的图像然后将其编码为jpeg格式，将其发送到客户端，然后在客户端读取它并将其保存为.jpg文件。

如何在服务器客户端上发送jpeg数据？

0 个答案: