#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<fcntl.h>
#include<arpa/inet.h>

#define PORT 8081
void send_file(int fd,char* filename)
{
    int fp = open(filename,O_RDONLY);
    printf("file:%s",filename);

    if(fp < 0)
    {
        printf("file doesn't open\n");
        return ;
    }
    
    char buffer[1024];
    int bytes_read;

    while((bytes_read  = read(fp,buffer,sizeof(buffer)))>0)
    {
        if((send(fd,buffer,bytes_read,0))<0)
        {
            perror("send data failed\n");
            break;
        }
    }
    close(fp);
    return;
}
int main()
{
    int sockfd,new_socket;
    struct sockaddr_in address;

    if((sockfd = socket(AF_INET,SOCK_STREAM,0))<0)
        perror("socket creation failed\n");


    address.sin_family = AF_INET;
    address.sin_port = htons(PORT);
    address.sin_addr.s_addr = INADDR_ANY;

     if((bind(sockfd,(struct sockaddr*)&address,sizeof(address)))<0)
            perror("bind failed\n");

       if((listen(sockfd,3))<0)
            perror("server listening failed\n");
       else
           printf("server listening\n");

       int addrlen =sizeof(address);
     while((new_socket = accept(sockfd, (struct sockaddr *)&address, (socklen_t*)&addrlen))) {

         printf("connected to client\n");
            
         char s[20];
         int read_data;
         read_data = read(new_socket,s,sizeof(s)-1);
         s[read_data]='\0';

         printf("which file we want to read\n");

         send_file(new_socket,s);

         printf("file sent to client\n");
         close(new_socket);
        
     }
     close(sockfd);


}