在Windows中利用socket传输double、视频、文本数据

一、传输double类型数据
server端

#include <iostream>
#include <winsock2.h>
#pragma comment (lib, "ws2_32.lib")  //加载 ws2_32.dll
#pragma warning(disable:4996)
#define BUF_SIZE 100
using namespace std;



int main()
{
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    SOCKET array_servSock[10] = {};

    //创建套接字
    SOCKET servSock = socket(AF_INET, SOCK_STREAM, 0);


    //绑定套接字
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_family = PF_INET;  //使用IPv4地址
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");  //具体的IP地址
    sockAddr.sin_port = htons(18000);  //端口
    bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));

    //进入监听状态
    listen(servSock, 20);

    //接收客户端请求
    SOCKADDR clntAddr;
    int nSize = sizeof(SOCKADDR);
    char buffer[BUF_SIZE] = { 0 };  //缓冲区
    char *str = "Hello World!";
    double a[3] = { 2.0, 3.0, 4.0};
    SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);    //和客户端建立连接
    while (1)   //  循环发送数据
    {
        a[0] = a[0] + a[1];     
        **send(clntSock, (char*)&a, sizeof(a), NULL);     // 这一句用来转换数据类型的，在客户端中接收数据的地方也是这样写的，怎么发送就怎么接收数据**  
        memset(buffer, 0, sizeof(a));  //重置缓冲区      
    }

    //关闭套接字
    closesocket(clntSock);
    closesocket(servSock);
    //终止 DLL 的使用
    WSACleanup();
    return 0;
}

客户端

#include <stdio.h>
#include <WinSock2.h>
#include <windows.h>
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll
#pragma warning(disable:4996)
#define BUF_SIZE 100

int main()
{
    //初始化DLL
    WORD myVersionRequest;
    myVersionRequest = MAKEWORD(2, 2);
    WSADATA wsaDate;
    int err;
    err = WSAStartup(myVersionRequest, &wsaDate);
    if (!err)
    {
        printf("已经打开套接字\n");
    }
    else
    {
        printf("未打开套接字\n");
        return 0;
    }
    //向服务器发起请求
    SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    sockaddr_in sockAddr;
    //memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充

    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockAddr.sin_family = PF_INET;
    sockAddr.sin_port = htons(18000);
    double a[3];    
    connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    while (1)
    {
        //接收服务器传回的数据
        **recv(sock, (char*)&a, sizeof(a), 0);**
        //输出接收到的数据
        printf("Message form server: %lf  %lf  %lf\n", a[0],a[1],a[2]);
        memset((char*)&a, 0, sizeof(a));  //重置缓冲区
    }
    closesocket(sock);  //关闭套接字
    WSACleanup();  //终止使用 DLL
    return 0;
}

二、传输视频或者文件，这个时候需要用二进制打开文件
server端

#include<iostream>
#include<Winsock2.h>
#include<fstream>
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll

using namespace std;

int socket_client_media();
#define BUFFER_SIZE 1000
int socket_server_media()
{
    ifstream  read_media;          // 创建文件的输入流
    read_media.open("read_media.mp4", ios::in | ios::binary);        // 以二进制的形式打开文件
    if (read_media.fail())
        cout << "open filure" << endl;

    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    SOCKET servSock = socket(AF_INET, SOCK_STREAM, 0);
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));
    sockAddr.sin_family = PF_INET;
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockAddr.sin_port = htons(18000);
    bind(servSock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    listen(servSock, 20);
    SOCKADDR clntAddr;
    int nSize = sizeof(SOCKADDR);
    SOCKET clntSock = accept(servSock, (SOCKADDR*)&clntAddr, &nSize);
    **//循环发送数据，直到文件结尾
    char buffer[BUFFER_SIZE] = { 0 };  //缓冲区
    while (!read_media.eof())               // 判断文件是否读取结束
    {
        read_media.read(buffer, sizeof(buffer));        // 读取文件数据
        send(clntSock, buffer, sizeof(buffer), 0);      //发送文件数据
    }**
    shutdown(clntSock, SD_SEND);  //文件读取完毕，断开输出流，向客户端发送FIN包
    recv(clntSock, buffer, BUFFER_SIZE, 0);  //阻塞，等待客户端接收完毕
    read_media.close();

    closesocket(clntSock);
    closesocket(servSock);
    WSACleanup();
    return 0;
}

client端

#include<iostream>
#include<Winsock2.h>
#include<fstream>
#pragma comment(lib, "ws2_32.lib")  //加载 ws2_32.dll

using namespace std;

int socket_client_media();

#define BUFFER_SIZE 1000

int socket_client_media()
{
    ofstream  write_media("write_media.mp4", ios::out | ios::binary);
    //write_media.open("write_media.avi", ios::out | ios::binary);
    if (write_media.fail())
        cout << "open failure" << endl;

    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    //创建套接字
    SOCKET sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    //向服务器发起请求
    sockaddr_in sockAddr;
    memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
    sockAddr.sin_family = PF_INET;
    sockAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockAddr.sin_port = htons(1234);
    connect(sock, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
    //循环接收数据，直到文件传输完毕
    char buffer[BUFFER_SIZE] = { 0 };  //文件缓冲区
    int nCount;
    while ((nCount = recv(sock, buffer, BUFFER_SIZE, 0)) > 0)    //判断文件是否接收完毕
    {
        write_media.write(buffer, sizeof(buffer));
    }
    puts("File transfer success!");
    //文件接收完毕后直接关闭套接字，无需调用shutdown()
    write_media.close();
    //关闭套接字
    closesocket(sock);
    //终止使用 DLL
    WSACleanup();   
    return 0;
}

在Windows中利用socket传输double、视频、文本数据

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