CLIENT

#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define MAX 80
#define PORT 7778
#define SA struct sockaddr
#define BLOCK_SIZE 1024


int main(int argc, char * argv[])
{
    if (argc < 2)
    {
        printf("The second parameter is not specified: \ "name of the program to run on the server \"\n");
        exit(-1);
    }

    FILE * file;
    if ((file = fopen(argv[1], "r")) == NULL)
    {
        printf("Error opening file\n");
        exit(-1);
    }
    int fileno_1 = fileno(file);

    int sockfd, connfd;
    struct sockaddr_in servaddr, cli;

    // socket create and verification
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) {
        printf("Socket Creation Failed...\n");
        exit(0);
    }
    else
        printf("Socket Successfully Created...\n");
    bzero(&servaddr, sizeof(servaddr));

    // assign IP, PORT
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    servaddr.sin_port = htons(PORT);

    // connect the client socket to server socket
    if (connect(sockfd, (SA*)&servaddr, sizeof(servaddr)) != 0) {
        printf("Connection With the Server Failed...\n");
        exit(0);
    }
    else
        printf("Connected to the Server...\n");

    // function for chat
    char buffer[BLOCK_SIZE];
    char buffer_2[BLOCK_SIZE];
    int count_chars;
    while ((count_chars = read(fileno_1, buffer, BLOCK_SIZE)) > 0)
    {
        write(sockfd, &buffer, count_chars);
    }
    printf("File sent\n");
    fclose(file);
    close(sockfd);

    if ((file = fopen("result", "w")) == NULL)
    {
        printf("Error creating program result file\n");
        //close(sockfd);
        return -1;
    }
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (connect(sockfd, (SA*)&servaddr, sizeof(servaddr)) != 0) {
        printf("Connection With the Server Failed...\n");
        exit(0);
    }
    else
        printf("Connected to the Server...\n");

    printf("Waiting for result file\n");
    while ((count_chars = read(sockfd, buffer_2, BLOCK_SIZE)) > 0)
    {
        write(fileno(file), buffer_2, count_chars);
    }
    printf("The result is saved in a file result\n");
    fclose(file);
    close(sockfd);
    printf("Success finish: %s\n", argv[0]);

    // close the socket
    close(sockfd);
}