Python Requests to Forge API - 401 Response "Authorization failed"

Question

def get_token():
    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    data = {'client_id': 'XXX', 'client_secret': 'XXX', 'grant_type': 'client_credentials', 'scope': 'data:read'}
    response = requests.post('https://developer.api.autodesk.com/authentication/v1/authenticate', headers=headers, data=data)
    return response.json()['access_token']

print('Bearer ' + get_token())
response_form_templates = requests.get('https://developer.api.autodesk.com/construction/forms/v1/projects/:projectId/form-templates', headers={'Authorization': 'Bearer ' + get_token()})
print(response_form_templates.json())
print(response_form_templates)

I'm trying to use python requests to simply get back the form-templates and all I'm getting back is a 401 response and a message saying "Authorization failed". The few print statements in there are from my trying to debug what's going wrong, but with my client_id and client_secret in there, it gives me those errors.

Any idea as to what could be wrong would be really helpful, thanks.

I see you print a bearer token. Does the server where you post use bearer authorization token? If yes, you need to include the authorization token in the headers headers = {'Content-Type': 'application/x-www-form-urlencoded', 'Authorization': f'Bearer {get_token()}'} — Alexandru Placinta
– Alexandru Placinta, Commented Mar 15, 2022 at 19:06
@AlexandruPlacinta It does, the server sends back a bearer token. The authorization token is included in the headers of the get request. That just updated, let me give that a shot. — noname
– noname, Commented Mar 15, 2022 at 19:09
@AlexandruPlacinta No cookie is sent, the Forge API docs just say you need to set the scope to data:read for the endpoint I'm hitting and then pass in the access_token. — noname
– noname, Commented Mar 15, 2022 at 19:12
You have projects/:projectId. Don't you need to set the :projectId? — Alexandru Placinta
– Alexandru Placinta, Commented Mar 15, 2022 at 19:16

Petr Broz · Accepted Answer · 2022-03-16 10:23:56Z

1

Btw. we don't have an official Forge SDK for Python yet but there's a simple, unofficial one here: https://github.com/petrbroz/forge-sdk-python that you could perhaps use as a reference when building the HTTP requests yourself. For example, here's how the SDK retrieves the 2-legged access token: https://github.com/petrbroz/forge-sdk-python/blob/develop/src/autodesk_forge_sdk/auth.py#L147-L178.

answered Mar 16, 2022 at 10:23

Petr Broz

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Arrotech · Accepted Answer · 2022-03-17 09:19:46Z

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You are using a 2-legged token instead of a 3-legged token. As you can see from the image below, you require a 3-legged token when you want to retrieve form templates.

Use this link and see how you can get a 3-legged token.

answered Mar 17, 2022 at 9:19

Arrotech

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