Say I want to download an e-tagged Blob from Azure Blob storage, usually I would do that by setting a If-None-Match header with the e-tag I currently have (other headers are supported too: https://docs.microsoft.com/en-us/rest/api/storageservices/fileservices/Specifying-Conditional-Headers-for-Blob-Service-Operations?redirectedfrom=MSDN).
In case I already have the latest blob version I would get a 304 (Not Modified) status code, otherwise a 200 with the new file etc.
The problem here is that the AndroidClientHandler does not support the 304 Status Code and throws an InvalidOperationException
Would really love to be able to use this handler for Azure Blobs.
PR opened https://github.com/xamarin/xamarin-android/pull/487
xamarin-android/master, commit c68f79ad387d8254ec2f29c4e8eb00ec8ea1eb1e
monodroid/master, commit fc64987a5dac4c0bd5e861720c29fba093437f05