Before this change the newObject* functions could return object=nil
with err=nil. The result of these functions are passed outside of the
backend code (eg in Copy, Move) and returning a nil object with a nil
error leads to crashes elsewhere as it breaks expectations.
After this change we return (nil, fs.ErrorObjectNotFound) in these
cases. The one place this is actually needd internally (when turning
items into listings) we detect that error and use it to mean skip the
directory item.
This problem was noticed while testing the shortcuts code. It
shouldn't happen normally but it is conceivable it could.
Apparently some tools (eg duplicati) upload the SHA1 in uppercase to
b2 to be stored in the `large_file_sha1` metadata. This patch forces
it to lower case.
Before this change if you specified --hash MD5 in rclone lsf it would
calculate all the hashes and just return the MD5 hash which was very
slow on the local backend.
Likewise specifying --hash on rclone lsjson was equally slow.
This change introduces the --hash-type flag (and corresponding
internal parameter) so that the hashes required can be selected in
lsjson.
This is used internally in lsf when the --hash parameter is selected
to speed up the hashing by only hashing with the one hash specified.
Fixes#4181
These commands are for implementing backend specific
functionality. They have documentation which is placed automatically
into the backend doc.
There is a simple test for the feature in the backend tests.
According to Microsoft support this error can be caused by
> A timing/concurrency issue where the PUT operations are happening
> about the same time for a single blob. The Put Block List operation
> writes a blob by specifying the list of block IDs that make up the
> blob. In order to be written as part of a blob, a block must have
> been successfully written to the server in a prior Put Block
> operation.
>
> Documentation reference:
>
> https://docs.microsoft.com/en-us/rest/api/storageservices/put-block
>
> This error can happen when doing concurrent upload commits after you
> have started the upload but before you commit. In that case, the
> upload fails. The application can retry this error or attempt some
> other recovery action based on the required scenario.
See: https://forum.rclone.org/t/error-while-syncing-with-azure-blob-storage-x-ms-error-code-invalidbloborblock/15561
For a certain class of broken or missing image Google Photos puts an
image in the error message.
Before this fix we blindly chucked it into the error message.
After this fix we replace it with some sensible text.
Before this fix, FixRangeOption would substitute RangeOptions it
wanted to get rid of with with empty HTTPOption. This caused a problem
now that backends interpret HTTPOptions.
This fix subsitutes those with NullOptions which aren't interpreted as
HTTPOptions. This patch also improves the unit tests.
