output.c

#include "cs537.h"
#include <sys/time.h>
#include <assert.h>
#include <unistd.h>


//
// This program is intended to help you test your web server.
// You can use it to test that you are correctly having multiple threads
// handling http requests.
// 

double spinfor = 5.0;

void getargs()
{
  char *buf, *p;

  /* Extract the four arguments */
  if ((buf = getenv("QUERY_STRING")) != NULL) {
    p = strtok(buf, "&");
    if (p == NULL) 
      return;
    spinfor = (double) atoi(p);
    return;
  }
}

double Time_GetSeconds() {
    struct timeval t;
    int rc = gettimeofday(&t, NULL);
    assert(rc == 0);
    return (double) ((double)t.tv_sec + (double)t.tv_usec / 1e6);
}


int main(int argc, char *argv[])
{
  char content[MAXBUF];

  getargs();

  double t1 = Time_GetSeconds();
  while ((Time_GetSeconds() - t1) < spinfor)
      sleep(1);
  double t2 = Time_GetSeconds();

  /* Make the response body */
  sprintf(content, "<p>Welcome to the CGI program</p>\r\n");
  sprintf(content, "%s<p>My only purpose is to waste time on the server!</p>\r\n", content);
  sprintf(content, "%s<p>I spun for %.2f seconds</p>\r\n", content, t2 - t1);
  
  /* Generate the HTTP response */
  printf("Content-length: %lu\r\n", strlen(content));
  printf("Content-type: text/html\r\n\r\n");
  printf("%s", content);
  fflush(stdout);

  exit(0);
}