def purge(url=None):
akamai_config = settings.WAGTAILFRONTENDCACHE.get('akamai', {})
cloudfront_config = settings.WAGTAILFRONTENDCACHE.get('files', {})
if url:
# Use the Wagtail frontendcache PurgeBatch to perform the purge
batch = PurgeBatch()
batch.add_url(url)
# If the URL matches any of our CloudFront distributions, invalidate
# with that backend
if any(k for k in cloudfront_config.get('DISTRIBUTION_ID', {})
if k in url):
logger.info('Purging {} from "files" cache'.format(url))
batch.purge(backends=['files'])
# Otherwise invalidate with our default backend
else:
logger.info('Purging {} from "akamai" cache'.format(url))
batch.purge(backends=['akamai'])
return "Submitted invalidation for %s" % url
else:
# purge_all only exists on our AkamaiBackend
backend = AkamaiBackend(akamai_config)
logger.info('Purging entire site from "akamai" cache')
backend.purge_all()
return "Submitted invalidation for the entire site."
def cloudfront_cache_invalidation(sender, instance, **kwargs):
if not settings.ENABLE_CLOUDFRONT_CACHE_PURGE:
return
if not instance.file:
return
url = instance.file.url
logger.info('Purging {} from "files" cache'.format(url))
batch = PurgeBatch()
batch.add_url(url)
batch.purge(backends=['files'])
def purge_documents_when_collection_saved_with_restrictions(
sender, instance, **kwargs):
if not instance.get_view_restrictions():
logger.debug(
'Collection "%s" saved, don\'t purge from cache because it has '
'no view restriction', instance.name)
return
logger.debug(
'Collection "%s" saved, has restrictions, purge its documents from '
'the cache', instance.name)
batch = PurgeBatch()
for document in Document.objects.filter(collection=instance):
batch.add_url(document.url)
batch.add_url(document.file.url)
batch.purge(backend_settings=WAGTAIL_STORAGES_DOCUMENTS_FRONTENDCACHE)
def purge_document_from_cache(document):
# No need for check if they are public or private - if they've changed,
# they should be out of cache.
logger.debug('Purge document "%s" from the front-end cache',
document.file.name)
frontend_cache_configuration = get_frontend_cache_configuration()
if frontend_cache_configuration:
s3_batch = PurgeBatch()
s3_batch.add_url(document.file.url)
s3_batch.purge(backend_settings=frontend_cache_configuration)
# Purge Wagtail document view URLs using normal site's cache.
wagtail_batch = PurgeBatch()
wagtail_batch.add_urls(
build_absolute_urls_for_all_sites_for_path(document.url))
wagtail_batch.purge()
def purge_collection_documents_from_cache(collection):
# Do not purge documents if they are in a public collection. Documents
# themselves have not changed so no need to make redundant calls for big
# collections.
if not collection.get_view_restrictions():
return
logger.debug(
'Purge documents of collection "%s" from the front-end cache',
collection.name,
)
# Purge download URLs and actual files if they possibly used to be public.
wagtail_batch = PurgeBatch()
s3_batch = PurgeBatch()
for document in get_document_model().objects.filter(collection=collection):
wagtail_batch.add_urls(
build_absolute_urls_for_all_sites_for_path(document.url))
s3_batch.add_url(document.file.url)
wagtail_batch.purge()
frontend_cache_configuration = get_frontend_cache_configuration()
if frontend_cache_configuration:
s3_batch.purge(backend_settings=frontend_cache_configuration)
def purge_cache_for_api(**kwargs):
batch = PurgeBatch()
batch.add_url(settings.BASE_URL + reverse("api-stream"))
batch.add_url(settings.BASE_URL + "/en/stream/")
batch.add_url(settings.BASE_URL + "/sk/stream/")
batch.purge()
def purge_cache_for_index_pages(**kwargs):
batch = PurgeBatch()
batch.add_pages(IndexPages().set())
batch.add_url(settings.BASE_URL + "/en/events/json/")
batch.add_url(settings.BASE_URL + "/sk/events/json/")
batch.purge()
def purge_document_from_cache_when_saved(sender, instance, **kwargs):
logger.debug('Document "%s" saved, purge from cache', instance.file.name)
batch = PurgeBatch()
batch.add_url(instance.url)
batch.add_url(instance.file.url)
batch.purge(backend_settings=WAGTAIL_STORAGES_DOCUMENTS_FRONTENDCACHE)