Script to install OCS agent silently

import os

import ssl

import ctypes

import urllib2

from subprocess import PIPE, Popen

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server_address = itsm.getParameter('ServerURL') ##Provide your Server URL

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# Path where the OCS Inventory Agent typically gets installed

INSTALLATION_PATH = r"C:\Program Files\OCS Inventory Agent\OcsSystray.exe"

​

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)

​

# Determine architecture

with disable_file_system_redirection():

    arch = os.popen("wmic os get OSArchitecture").read()

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if '64' in arch:

    url = "https://cdn-patchportal-one.comodo.com/portal/packages/spm/OCS%20Inventory%20NG%20Agent/x64/OCS-Windows-Agent-Setup-x64.exe"

else:

    url = "https://cdn-patchportal-one.comodo.com/portal/packages/spm/OCS%20Inventory%20NG%20Agent/x86/OCS-Windows-Agent-Setup-x86.exe"

​

Down_path = os.environ['TEMP']

fileName = url.split('/')[-1]

DownTo = os.path.join(Down_path, fileName)

​

def ecmd(command):   

    with disable_file_system_redirection():

        obj = Popen(command, shell=True, stdout=PIPE, stderr=PIPE)

    out, err = obj.communicate()

    ret = obj.returncode

    if ret == 0:

        if out:

            return out.strip()

        else:

            return ret

    else:

        if err:

            return err.strip()

        else:

            return ret

​

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()

    try:

        request = urllib2.Request(fromURL, headers=headers)

        req = urllib2.urlopen(request, context=context)

        with open(DownTo, 'wb') as f:

            while True:

                chunk = req.read(1024 * 1024)  # 1MB chunks

                if chunk:

                    f.write(chunk)

                else:

                    break

        if os.path.isfile(DownTo):

            return '{} - {}KB'.format(DownTo, os.path.getsize(DownTo) / 1024)

    except urllib2.URLError as e:

        return 'URL Error: {}'.format(str(e))

    except IOError as e:

        return 'IO Error: {}'.format(str(e))

    except Exception as e:

        return 'Error: {}'.format(str(e))

​

def is_already_installed():

    """Check if OCS Inventory Agent is already installed."""

    if os.path.isfile(INSTALLATION_PATH):

        print("OCS Inventory Agent is already installed.")

        return True

    else:

        return False

​

def install():

    if not is_already_installed():

        with disable_file_system_redirection():

            print("OCS Inventory Agent not found. Starting download and installation...")

            download_result = downloadFile(DownTo, url)

            print(download_result)

            if 'Error' not in download_result:

                print(ecmd('"%s" /S /SERVER="%s"' % (DownTo, server_address)))

                if os.path.isfile(DownTo):

                    os.remove(DownTo)

            else:

                print("Download failed. Installation aborted.")

    else:

        print("Skipping installation as OCS Inventory Agent is already installed.")

​

if __name__ == "__main__":

    install()

​