[Python] session.get not getting corrected file on remote server/local server

I have this piece of code that works complete fine on a single python script. When I try to test it out on local server it returns a html page saying link is not vaild. (I am expecting a PDF downloaded). Both localserver and python script returns a 200. url is the download link of a pdf file on the website.

def get_file(url):
headers = {
'User-Agent': user_agent,
'Cookie': cookie,
}
session = requests.Session()
try:
response = session.get(url, headers=headers, verify=False)
filename = response.headers['Content-Disposition'].split('"')[-2]
with open(filename, 'wb') as f:
f.write(response.content)
fileFullPath = os.path.abspath(filename)
print(fileFullPath)
except requests.exceptions.HTTPError as err:
print("file download fail err {}".format(err.response.status_code))

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