#To define a particular parameter, replace the 'parameterName' inside itsm.getParameter('parameterName') with that parameter's name

fromURL='https://script-downloads.itarian.com/Dotnet_Framework/ndp481-web.exe'## Here mention the download url

import os
import ctypes
from subprocess import PIPE, Popen
import ctypes
import urllib2
import ssl
class disable_file_system_redirection:
    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))
    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)

Down_path=os.environ['PROGRAMDATA']
fileName = fromURL.split('/')[-1]
DownTo = os.path.join(Down_path, fileName)
def downloadFile(DownTo, fromURL):
    headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36'}
    context = ssl._create_unverified_context()
    request = urllib2.Request(fromURL, headers=headers)
    req = urllib2.urlopen(request,context=context)
    try:
        with open(DownTo, 'wb') as f:
            while True:
                chunk = req.read(100*1000*1000)
                if chunk:
                    f.write(chunk)
                else:
                    break
        if os.path.isfile(DownTo):
            return '{} - {}KB'.format(DownTo, os.path.getsize(DownTo)/1024)
		
    except:
        return 'Please Check URL or Download Path!'

if __name__=='__main__':
    print downloadFile(DownTo, fromURL )
    fileName = fromURL.split('/')[-1]
    print fileName
	
import shutil
import subprocess
with disable_file_system_redirection():
    try:
        if os.path.exists(DownTo):
            cmd = '"'+DownTo+'" /q /norestart'
            obj = subprocess.Popen(cmd, shell=True, stdout = subprocess.PIPE, stderr = subprocess.PIPE)
            out, err = obj.communicate()
            if err:
                print(err)
            else:
                print ".NET Framework Installed"
                print("Restart your device to see the Changes")
            
        else:
            print "Please check the path"
            
    except Exception as err :
        print err
	
if os.path.exists(DownTo):
    os.remove(DownTo)