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

char * host_name = "127.0.0.1"; // local host
int port = 8000;

main(int argc, char *argv[]) {
  char buf[8192];
  char message[256];
  int sd;
  struct sockaddr_in pin;
  struct hostent *nlp_host;

  if ((nlp_host = gethostbyname(host_name)) == 0) {
    printf("Error resolving local host\n");
    exit(1);
  }
    
  bzero(&pin, sizeof(pin));
  pin.sin_family = AF_INET;
  pin.sin_addr.s_addr = htonl(INADDR_ANY);
  pin.sin_addr.s_addr = ((struct in_addr *)(nlp_host->h_addr))->s_addr;
  pin.sin_port = htons(port);

  if ((sd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
    printf("Error opening socket\n");
    exit(1);
  }

  if (connect(sd, (void *)&pin, sizeof(pin)) == -1) {
    printf("Error connecting to socket\n");
    exit(1);
  }

  // NOTE: must send a carriage return at end of message:

  sprintf(message,"GET /index.html HTTP/1.1\n");

  printf("Sending message %s to web_server...\n", message);

  if (send(sd, message, strlen(message), 0) == -1) {
    printf("Error in send\n");
    exit(1);
  }

  printf("..sent message.. wait for response...\n");

  if (recv(sd, buf, 8192, 0) == -1) {
    printf("Error in receiving response from NLPserver\n");
    exit(1);
  }
  
  printf("\nResponse from NLPserver:\n\n%s\n", buf);
  
  close(sd);

}