TransportError when running within App Engine #46
Description
[REQUIRED] Step 2: Describe your environment
- Operating System version: MacOS Sierra (10.12.4)
- Firebase SDK version: 2.1.0
- Library version: N/A
- Firebase Product: Firebase Admin Python
[REQUIRED] Step 3: Describe the problem
Steps to reproduce:
- Set up a Google App Engine environment (Python 2.7). Add SSL as a library in app.yaml
- Write code for a trivial DB transaction
- Run this code in the development app engine environment (eg
dev_appserver.py app.yaml)
Running a trivial DB write results in this error message:
Traceback (most recent call last):
File "/Users/rajvir/Dev/SR-backend/scraper.py", line 289, in firebase_test
'test': 'value'
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/db.py", line 152, in set
self._client.request_oneway('put', self._add_suffix(), json=value, params='print=silent')
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/db.py", line 603, in request_oneway
self._do_request(method, urlpath, **kwargs)
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/db.py", line 631, in _do_request
resp = self._session.request(method, self._url + urlpath, auth=self._auth, **kwargs)
File "/Users/rajvir/Dev/SR-backend/lib/requests/sessions.py", line 488, in request
prep = self.prepare_request(req)
File "/Users/rajvir/Dev/SR-backend/lib/requests/sessions.py", line 431, in prepare_request
hooks=merge_hooks(request.hooks, self.hooks),
File "/Users/rajvir/Dev/SR-backend/lib/requests/models.py", line 309, in prepare
self.prepare_auth(auth, url)
File "/Users/rajvir/Dev/SR-backend/lib/requests/models.py", line 540, in prepare_auth
r = auth(self)
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/db.py", line 674, in __call__
req.headers['Authorization'] = 'Bearer {0}'.format(self._app._get_token())
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/__init__.py", line 211, in _get_token
self._token = self._credential.get_access_token()
File "/Users/rajvir/Dev/SR-backend/lib/firebase_admin/credentials.py", line 97, in get_access_token
self._g_credential.refresh(_request)
File "/Users/rajvir/Dev/SR-backend/env/lib/python2.7/site-packages/google/oauth2/service_account.py", line 310, in refresh
request, self._token_uri, assertion)
File "/Users/rajvir/Dev/SR-backend/env/lib/python2.7/site-packages/google/oauth2/_client.py", line 143, in jwt_grant
response_data = _token_endpoint_request(request, token_uri, body)
File "/Users/rajvir/Dev/SR-backend/env/lib/python2.7/site-packages/google/oauth2/_client.py", line 104, in _token_endpoint_request
method='POST', url=token_uri, headers=headers, body=body)
File "/Users/rajvir/Dev/SR-backend/env/lib/python2.7/site-packages/google/auth/transport/requests.py", line 115, in __call__
raise exceptions.TransportError(exc)
TransportError: ('Connection aborted.', error(13, 'Permission denied'))
Running this same code outside of the App Engine environment works normally as expected.
Relevant Code:
cred = credentials.Certificate('service_account_file.json')
firebase_admin.initialize_app(cred, {
'databaseURL': 'https://APP_ID.firebaseio.com'
})
ref = db.reference()
def firebase_test():
try:
ref.set({
'test': 'value'
})
except:
traceback.print_exc()