Configurable mime-types for upload-batch

Is your feature request related to a problem? Please describe.

When using a storage account as a static file host and uploading a large set of files, it is really annoying when the content type is guessed wrong. Especially since these metadata seems impossible to update via az.

Example: woff2 file should (since 2017) have content type font/woff2, but is uploaded as application/octet-stream when using az storage blob upload-batch.

Describe the solution you’d like

The ability to provide the path to a custom mime-types file (hopefully with the same syntax as other mime.types files) or clear instructions (across OS) on how to configure . Especially how to configure the Docker image mcr.microsoft.com/azure-cli to work with custom mime-types.

Example: az storage blob upload-batch --source ./folder --destination static --connection-string <cstr> --mime-types ./my-mime-types.conf

Describe alternatives you’ve considered

Beyond programming my own bulk uploader, I don’t have any suggestions for workarounds.

Additional context

[devbeard]

If someone else comes across this thread, I managed to sort of get it working, but I don’t think it is a perfect workaround, and I hope MSFT continues with a solution on their end as well @Juliehzl .

Workaround: By leveraging that I am root in my container that I deploy to the storage account from (build pipeline), I change the mimetypes in the system on the fly. I have a mimetype file in my CDN repository that I utilize to version control the mapping.

touch /etc/mime.types
cat ./my-mime-types | tee -a /etc/mime.types
az storage blob upload-batch --destination $STR_CONTAINER --source ./cdn --connection-string "$CDN_CSTR"

AzCli (and the mimetype python module, whos defaults are a bit dated) seems to have code for user folder lookup of a mimetype file, but I could only get the system replacement working. See these lines: https://github.com/python/cpython/blob/master/Lib/mimetypes.py#L42-L52

Example contents of my repo mimetype file:

font/ttf                     ttf
font/woff                    woff
font/woff2                   woff2
image/x-icon                 ico
text/javascript              js
application/xml              xml
application/octet-stream     map

[Juliehzl]

will consider the implementation when migrating track 2.