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Fix bug in remote thumbnail search (#8438)

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#7124 changed the behaviour of remote thumbnails so that the thumbnailing method was included in the filename of the thumbnail. To support existing files, it included a fallback so that we would check the old filename if the new filename didn't exist.

Unfortunately, it didn't apply this logic to storage providers, so any thumbnails stored on such a storage provider was broken.
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Richard van der Hoff 2020-10-02 12:29:29 +01:00 committed by GitHub
parent 695240d34a
commit 73d93039ff
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2 changed files with 24 additions and 20 deletions
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changelog.d/8438.bugfix Normal file
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@ -0,0 +1 @@
Fix a regression in v1.21.0rc1 which broke thumbnails of remote media.

25
synapse/rest/media/v1/media_storage.py
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@ -141,31 +141,34 @@ class MediaStorage:
Returns:
Returns a Responder if the file was found, otherwise None.
"""
paths = [self._file_info_to_path(file_info)]
path = self._file_info_to_path(file_info)
local_path = os.path.join(self.local_media_directory, path)
if os.path.exists(local_path):
return FileResponder(open(local_path, "rb"))
# Fallback for paths without method names
# Should be removed in the future
# fallback for remote thumbnails with no method in the filename
if file_info.thumbnail and file_info.server_name:
legacy_path = self.filepaths.remote_media_thumbnail_rel_legacy(
paths.append(
self.filepaths.remote_media_thumbnail_rel_legacy(
server_name=file_info.server_name,
file_id=file_info.file_id,
width=file_info.thumbnail_width,
height=file_info.thumbnail_height,
content_type=file_info.thumbnail_type,
)
legacy_local_path = os.path.join(self.local_media_directory, legacy_path)
if os.path.exists(legacy_local_path):
return FileResponder(open(legacy_local_path, "rb"))
)
for path in paths:
local_path = os.path.join(self.local_media_directory, path)
if os.path.exists(local_path):
logger.debug("responding with local file %s", local_path)
return FileResponder(open(local_path, "rb"))
logger.debug("local file %s did not exist", local_path)
for provider in self.storage_providers:
for path in paths:
res = await provider.fetch(path, file_info) # type: Any
if res:
logger.debug("Streaming %s from %s", path, provider)
return res
logger.debug("%s not found on %s", path, provider)
return None