33 lines
1.5 KiB
Python
33 lines
1.5 KiB
Python
"""
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This file contains a function used to retrieve the token for the annotation backend
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without having to create a view, but just returning a string instead.
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It can be called from other files by using the following:
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from xmodule.annotator_token import retrieve_token
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"""
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import datetime
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from firebase_token_generator import create_token
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def retrieve_token(userid, secret):
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'''
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Return a token for the backend of annotations.
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It uses the course id to retrieve a variable that contains the secret
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token found in inheritance.py. It also contains information of when
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the token was issued. This will be stored with the user along with
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the id for identification purposes in the backend.
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'''
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# the following five lines of code allows you to include the default timezone in the iso format
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# for more information: http://stackoverflow.com/questions/3401428/how-to-get-an-isoformat-datetime-string-including-the-default-timezone
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dtnow = datetime.datetime.now()
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dtutcnow = datetime.datetime.utcnow()
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delta = dtnow - dtutcnow
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newhour, newmin = divmod((delta.days * 24 * 60 * 60 + delta.seconds + 30) // 60, 60)
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newtime = "%s%+02d:%02d" % (dtnow.isoformat(), newhour, newmin)
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# uses the issued time (UTC plus timezone), the consumer key and the user's email to maintain a
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# federated system in the annotation backend server
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custom_data = {"issuedAt": newtime, "consumerKey": secret, "userId": userid, "ttl": 86400}
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newtoken = create_token(secret, custom_data)
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return newtoken
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