Styjun

I need to retrieve a JWT (JSON Web Token) from a Microsoft API using Python (check this API documentation for Microsoft Graph)

The following Python code using the requests library does not work giving HTTP response code 400, however, the equivalent cURL command does work giving back the expected JSON containing the JWT.

Python / requests code:

tenant = "<MY_FOO_TENANT>"
token_url = "https://login.microsoftonline.com//oauth2/v2.0/token".format(tenant)
http_headers = 
 'Content-Type': 'application/x-www-form-urlencoded',

http_query_params = 
 "client_id": "<MY_FOO_C_ID>",
 "scope": "<MY_FOO_SCOPE>",
 "client_secret": "<MY_FOO_C_SECRET>",
 "grant_type": "client_credentials",

http_response = requests.post(token_url, params=http_query_params, headers=http_headers)

cURL command:

curl -v -X POST 
 --data-urlencode 'client_id=<MY_FOO_C_ID>' 
 --data-urlencode 'scope=<MY_FOO_SCOPE>' 
 --data-urlencode 'client_secret=<MY_FOO_C_SECRET>' 
 --data-urlencode 'grant_type=client_credentials' 
 -H 'Content-Type: application/x-www-form-urlencoded' 
 'https://login.microsoftonline.com/<MY_FOO_TENANT>/oauth2/v2.0/token'

From the verbose output of the requests library I can see that it is URL encoding all those HTTP query parameters, so I tend to think that should not be the problem.

• what's wrong with the Python implementation?


• how to make it work?

you should pass http_query_params as data instead of params. try the following code:

tenant = "<MY_FOO_TENANT>"
token_url = "https://login.microsoftonline.com//oauth2/v2.0/token".format(tenant)
http_headers = 
 'Content-Type': 'application/x-www-form-urlencoded',

http_body = 
 "client_id": "<MY_FOO_C_ID>",
 "scope": "<MY_FOO_SCOPE>",
 "client_secret": "<MY_FOO_C_SECRET>",
 "grant_type": "client_credentials",

http_response = requests.post(token_url, data=http_body, headers=http_headers)

hope this helps