将文件从计算机上传到在线服务器上

嘿，我正在尝试编写一个可以将文件从我的计算机上传到在线服务器的程序。.我从套接字编程客户端开始。我编写了一个成功与服务器连接的代码，我也可以将消息发送给服务器，并可以从中获得答复...看看..

#include<stdio.h>
#include<winsock2.h>
#include<bits/stdc++.h>
#include<strings.h>
#pragma comment(lib,"ws2_32.lib") //Winsock Library

int main(int argc , char *argv[])
{
    struct sockaddr_in server;
    WSADATA wsa;
    SOCKET s;
       char *message , server_reply[2000];
    int recv_size;
    printf("nInitialising Winsock...");
    if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
    {
        printf("Failed. Error Code : %d",WSAGetLastError());
        return 1;
    }
    printf("Initialised.n");

    if((s = socket(AF_INET , SOCK_STREAM , 0 )) == INVALID_SOCKET)
    {
        printf("Could not create socket : %d" , WSAGetLastError());
    }
    printf("Socket created.n");
    server.sin_addr.s_addr = inet_addr("172.217.24.238");
    server.sin_family = AF_INET;
    server.sin_port = htons(80);
    //Connect to remote server
    if (connect(s , (struct sockaddr *)&server , sizeof(server)) < 0)
    {
        puts("connect error");
        return 1;
    }
    puts("Connected");
     //Send some data
    message = "GET / HTTP/1.1rnrn";
    if( send(s , message , strlen(message) , 0) < 0)
    {
        puts("Send failed");
        return 1;
    }
    puts("Data Sendn");

     //Receive a reply from the server
    if((recv_size = recv(s , server_reply , 2000 , 0)) == SOCKET_ERROR)
    {
        puts("recv failed");
    }
    puts("Reply receivedn");
    //Add a NULL terminating character to make it a proper string before printing
    server_reply[recv_size] = '';
    puts(server_reply);
    return 0;
}

请建议我如何对此进行修改以将文件从我的计算机上传到我知道的IP地址和端口号的服务器.....PS：我是插座编程的新手。请帮助....

实际：成功建立与服务器的连接的代码，我也可以将消息发送到服务器，并且可以从中获得答复...预期：修改以将某些文件上传到其IP地址和端口号的服务器上...