* feat(azure): implement server-side copy with fallback
Add server-side object copy for the Azure backend using StartCopyFromURL, with a
fallback to download+reupload when server-side copy is unavailable. The copy
logic lives in backend/azure/copy.go and handles metadata, tagging and object
lock configurations.
The copy-source SAS service version is configurable via the --copy-sas-version
flag (AZ_COPY_SAS_VERSION) and defaults to the SDK version, so production is
unchanged. Endpoints that lag the SDK's SAS version (e.g. Azurite) cannot verify
a SAS signed with the newer version and can set an older one. On a metadata-COPY,
the internal website-redirect key is dropped from the destination to match the
download+reupload fallback.
Testing:
- Add CopyObject_cross_bucket_server_side_copy, which copies an object with data,
user metadata, content-type and tags across two buckets and verifies all are
preserved and an ETag is returned.
- Configure the Azurite functional-test gateway with AZ_COPY_SAS_VERSION and let
Azurite trust its self-signed test certificate (NODE_EXTRA_CA_CERTS) so it can
fetch the copy source from its own HTTPS endpoint, ensuring CI exercises the
real server-side copy path instead of always falling back.
Signed-off-by: Nils Leger <nils.leger@getflip.com>
* docs: update copyright year
Signed-off-by: Nils Leger <nils.leger@getflip.com>
* fix: always fallback to download+upload whenever there is an error building the server-side copy URL
Signed-off-by: Nils Leger <nils.leger@getflip.com>
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Signed-off-by: Nils Leger <nils.leger@getflip.com>
Nils LegerandGitHub
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