import os
import time
import argparse
import platform

def visit_win(url, times, duration):
  import urllib2
  def _visit_win():
    try:
      s = urllib2.urlopen(url).read()
    except urllib2.HTTPError,e:
      print (e.code)
  for i in range(times):
    _visit_win()
    print("{} Done!".format(i+1))
    #do not use duration in win

def visit_linux(url, times, duration):
  import subprocess
  cmd = "curl {}".format(url)
  for i in range(times):
    subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE,shell=True)
    print("{} Done!".format(i+1))
    time.sleep(duration)

def parse_input():
  input_parser = argparse.ArgumentParser()
  input_parser.add_argument("--url",'-u', help="the url your need to visit")
  input_parser.add_argument("--times",'-t', type=int, default=10, help="how many times you need to visit")
  input_parser.add_argument("--duration",'-d', default=0.5, type=float, help="the duration between two visits")
  input_args = input_parser.parse_args()
  url = input_args.url
  times = input_args.times
  duration = input_args.duration
  return url, times, duration 

def main():
  url, times, duration = parse_input()
  if platform.system().lower() == 'linux':
    visit_linux(url, times, duration)
  else:
    visit_win(url, times, duration)
  print("My evil job is finished!")

if __name__ == '__main__':
  main()