Python Requests Microsoft Graph API Authentication

Question

I'm having issues receiving the bearer token using Python for the Microsoft Graph API. Here is what I have so far:

import requests
import json

headers = {
'Content-Type': 'x-www-form-urlencoded',
'Authorization': 'Basic'
}

data = {
"grant_type": "client_credentials",
"client_id" :"<client_id>",
"client_secret": "<client_secret>",
"resource": "https://graph.microsoft.com"
}

r = requests.post('<token_address>', headers=headers, data=data)
print(r.text)

I have it worked in Postman, through x-www-form-urlencoded, but can't seem to get it working in Python. It returns The request body must contain the following parameter: 'grant_type'. I realize the problem probably has to do with needed the data converted, but I am not sure where to start.

Try this: similar Problem and Answer

knobi
– knobi

2020-01-30 09:49:24 +00:00
Commented Jan 30, 2020 at 9:49 — knobi
– knobi, Commented Jan 30, 2020 at 9:49

Marc LaFleur · Accepted Answer · 2018-06-25 18:27:19Z

3

You're sending some invalid headers in your request:

The Content-Type should be application/x-www-form-urlencoded not x-www-form-urlencoded.
You shouldn't be sending an Authorization header at all.

Technically, since requests.post sends data as form encoded by default, you can safely remove your headers from the request:

payload = {
    'grant_type': 'client_credentials',
    'client_id': '<client_id>',
    'client_secret': '<client_secret>',
    'resource': 'https://graph.microsoft.com',
    }
r = requests.post('https://login.microsoftonline.com/common/oauth2/token', data=payload)
print(r.text)

answered Jun 25, 2018 at 18:27

Marc LaFleur

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Comments

Jeff Learman · Accepted Answer · 2018-06-22 18:22:31Z

0

I believe that OAuth expects the body to be URL-encoded, like this:

data = "grant_type=client_credentials"
    + "&client_id=<client_id>"
    + "&client_secret=<client_secret>"
    + "&resource=https://graph.microsoft.com"

answered Jun 22, 2018 at 18:22

Jeff Learman

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1 Comment

Mitchell Adams Over a year ago

Unfortunately, it is still returning the same error.

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