52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
"""
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A tiny app that checks for a status message.
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"""
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from django.conf import settings
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from django.core.cache import cache
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import json
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import logging
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import os
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log = logging.getLogger(__name__)
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def get_site_status_msg(course_id):
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"""
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Look for a file settings.STATUS_MESSAGE_PATH. If found, read it,
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parse as json, and do the following:
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* if there is a key 'global', include that in the result list.
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* if course is not None, and there is a key for course.id, add that to the result list.
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* return "<br/>".join(result)
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Otherwise, return None.
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If something goes wrong, returns None. ("is there a status msg?" logic is
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not allowed to break the entire site).
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"""
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try:
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# first check for msg in cache
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msg = cache.get('site_status_msg')
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if msg is not None:
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return msg
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if os.path.isfile(settings.STATUS_MESSAGE_PATH):
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with open(settings.STATUS_MESSAGE_PATH) as f:
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content = f.read()
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else:
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return None
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status_dict = json.loads(content)
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msg = status_dict.get('global', None)
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if course_id in status_dict:
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msg = msg + "<br>" if msg else ''
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msg += status_dict[course_id]
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# set msg to cache, with expiry 5 mins
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cache.set('site_status_msg', msg, 60 * 5)
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return msg
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except:
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log.exception("Error while getting a status message.")
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return None
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