Before this change, for some operations, eg rcat or copyto (of a file)
rclone would attempt to create the container when using a SAS URL
limited to a container.
After this change we assume the container does not need creating when
using a container SAS URL.
See: https://forum.rclone.org/t/rclone-rcat-azure-blob-container-sas-token-403-error/16286
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
- change the interface of listBuckets() removing dir parameter and adding context
- add makeBucket() and use in place of Mkdir("")
- this fixes some corner cases in Copy/Update
- mark all the listed buckets OK in ListR
Thanks to @yparitcher for the review.
* azureblob - Add support for Azure Storage Emulator to test things locally.
Testing - Verified changes by testing manually.
* docs: update azureblob docs to reflect support of storage emulator
- Change rclone/fs interfaces to accept context.Context
- Update interface implementations to use context.Context
- Change top level usage to propagate context to lover level functions
Context propagation is needed for stopping transfers and passing other
request-scoped values.
This enables MD5 checksum calculation and publication when uploading file above the "Cutoff" limit.
It was explictely ignored in case of multi-block (a.k.a. multipart) uploads to Azure Blob Storage.
Make the pacer package more flexible by extracting the pace calculation
functions into a separate interface. This also allows to move features
that require the fs package like logging and custom errors into the fs
package.
Also add a RetryAfterError sentinel error that can be used to signal a
desired retry time to the Calculator.
Before this change azureblob would attempt to create already existing
containers. This causes problems with limited permissions keys.
This change checks the container exists before trying to create it in
the same way the s3 backend does. This uses no more requests in the
usual case of the container existing.
See: https://forum.rclone.org/t/copying-individual-files-to-azure-blob-storage/8397
When a container is deleted, a container with the same name cannot be
created for at least 30 seconds; the container may not be available
for more than 30 seconds if the service is still processing the
request.
We sleep so that we wait at most 60 seconds. This is mostly useful in
the integration tests where containers get deleted and remade
immediately.
Before this change Rmdir would check the root rather than the
directory specified for being empty and return "directory not empty"
when it shouldn't have done.
Until https://github.com/Azure/azure-storage-blob-go/pull/75 is merged
the SDK can't upload a single blob of exactly the chunk size, so
upload files of this size with a multpart upload as a work around.
The previous fix for this 6a773289e7 turned out to cause problems
uploading files with maximum chunk size so needed to be redone.
Fixes#2653
