REST API - 403 Forbidden when trying to get FormDigest in Python

Question

I'm working on this Python script to upload file on a SharePoint :

from requests_ntlm import HttpNtlmAuth
from pypac import PACSession, get_pac

session = PACSession(get_pac(url='mypac.pac'))

headers = {
    'Content-Type': 'application/json;odata=verbose',
    'Accept': 'application/json;odata=verbose',
}
username = 'username'
password = 'password'
url = "https://my.sharepoint.com/path/_api/contextinfo"
request_result = session.get(url,
                             auth=HttpNtlmAuth(username, password),
                             headers=headers)
print(request_result)

Despite the fact that I have full permissions and no problem occured when I try manually with browsers, I always get 403 Forbidden error with the following message :

"Access denied. You do not have permission to perform this action or access this resource."

This script works well on two others SharePoint but not on this one.

Answer 1

It looks like you're trying to connect to SharePoint Online (sharepoint.com). You have to use FedAuth instead of Ntlm to authenticate against SharePoint Online.

See Vadim Gremyachev's great answer at https://stackoverflow.com/questions/35187724/remote-authentication-in-sharepoint-online

tl;dr: Vadim has published a sample project for REST authentication with Python under https://github.com/vgrem/Office365-REST-Python-Client