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from pillar import current_app
def regenerate_all_expired_links(backend_name: str, chunk_size: int):
"""Regenerate all expired links for all non-deleted file documents.
Probably only works on Google Cloud Storage ('gcs') backends at
the moment, since those are the only links that actually expire.
:param backend_name: name of the backend to refresh for.
:param chunk_size: the maximum number of files to refresh in this run.
from pillar.api import file_storage
# Refresh all files that already have expired or will expire in the next
# two hours. Since this task is intended to run every hour, this should
# result in all regular file requests having a valid link.
file_storage.refresh_links_for_backend(backend_name, chunk_size, expiry_seconds=7200)

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