Simple C Web Server

main.c

/* A simple server in the internet domain using TCP
   The port number is passed as an argument */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
     int sockfd, newsockfd, portno;
     socklen_t clilen;
     char buffer[256];
     struct sockaddr_in serv_addr, cli_addr;
     int n;

     if (argc < 2) {
         fprintf(stderr,"ERROR, no port provided\n");
         exit(1);
     }

     sockfd = socket(AF_INET, SOCK_STREAM, 0);

     bzero((char *) &serv_addr, sizeof(serv_addr));

     portno = atoi(argv[1]);

     serv_addr.sin_family = AF_INET;
     serv_addr.sin_addr.s_addr = INADDR_ANY;
     serv_addr.sin_port = htons(portno);

     n = bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));

     listen(sockfd,5);

     clilen = sizeof(cli_addr);

     newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);

     bzero(buffer, 256);

     read(newsockfd, buffer, 255);

     char * message =
        "HTTP/1.1 200 OK\n"
        "Date: Thu, 22 Jan 2015 00:53:12 GMT\n"
        "Server: Adam\n"
        "Content-Type: text/html\n"
        "Keep-Alive: timeout=30, max=500\n"
        "Connection: Keep-Alive\n"
        "\n"
        "Helloooo!!!!\n";

     n = write(newsockfd, message, strlen(message));

     close(sockfd);

     return 0;
}