74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
import logging
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import re
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from staticfiles.storage import staticfiles_storage
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from staticfiles import finders
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from django.conf import settings
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from xmodule.modulestore.django import modulestore
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from xmodule.modulestore.xml import XMLModuleStore
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from xmodule.contentstore.content import StaticContent
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log = logging.getLogger(__name__)
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def try_staticfiles_lookup(path):
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"""
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Try to lookup a path in staticfiles_storage. If it fails, return
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a dead link instead of raising an exception.
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"""
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try:
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url = staticfiles_storage.url(path)
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except Exception as err:
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log.warning("staticfiles_storage couldn't find path {0}: {1}".format(
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path, str(err)))
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# Just return the original path; don't kill everything.
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url = path
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return url
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def replace(static_url, prefix=None, course_namespace=None):
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if prefix is None:
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prefix = ''
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else:
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prefix = prefix + '/'
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quote = static_url.group('quote')
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servable = (
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# If in debug mode, we'll serve up anything that the finders can find
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(settings.DEBUG and finders.find(static_url.group('rest'), True)) or
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# Otherwise, we'll only serve up stuff that the storages can find
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staticfiles_storage.exists(static_url.group('rest'))
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)
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if servable:
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return static_url.group(0)
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else:
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# don't error if file can't be found
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# cdodge: to support the change over to Mongo backed content stores, lets
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# use the utility functions in StaticContent.py
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if static_url.group('prefix') == '/static/' and not isinstance(modulestore(), XMLModuleStore):
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if course_namespace is None:
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raise BaseException('You must pass in course_namespace when remapping static content urls with MongoDB stores')
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url = StaticContent.convert_legacy_static_url(static_url.group('rest'), course_namespace)
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else:
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url = try_staticfiles_lookup(prefix + static_url.group('rest'))
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new_link = "".join([quote, url, quote])
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return new_link
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def replace_urls(text, staticfiles_prefix=None, replace_prefix='/static/', course_namespace=None):
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def replace_url(static_url):
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return replace(static_url, staticfiles_prefix, course_namespace = course_namespace)
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return re.sub(r"""
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(?x) # flags=re.VERBOSE
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(?P<quote>\\?['"]) # the opening quotes
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(?P<prefix>{prefix}) # the prefix
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(?P<rest>.*?) # everything else in the url
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(?P=quote) # the first matching closing quote
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""".format(prefix=replace_prefix), replace_url, text)
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