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Fix KeyError in flask.py #55

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3 changes: 3 additions & 0 deletions pylti/flask.py
Original file line number Diff line number Diff line change
Expand Up @@ -208,7 +208,10 @@ def response_url(self):
uses PYLTI_URL_FIX map to support edX dev-stack

:return: remapped lis_outcome_service_url
:exception: LTIException if lis_outcome_service_url isn't present.
"""
if 'lis_outcome_service_url' not in session:
raise LTIException('lis_outcome_service_url isn\'t present.')
url = session['lis_outcome_service_url']
app_config = self.lti_kwargs['app'].config
urls = app_config.get('PYLTI_URL_FIX', dict())
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