Don't require SAS generation for simple previews

Problem

Simple previews leverage built-in web technologies to render common data formats, including PDFs. The preview panel's location just needs to be set to a blob or file URL. In order to provide access, a SAS must be generated. However, even if a user has read permissions, a blob cannot be viewed in Storage Explorer if the user is unable to generate a SAS URL to the blob/file.

Desired Solution

Improve on the existing simple preview so that SAS is not necessary to preview data. Rather than generate a SAS URL, it should be possible to download the data to a temporary location and generate a local file URL instead.

Alternatives and Workarounds

Download and open the file using another application.

Additional Context

Simple preview operates by attempting to generate a SAS URL for the blob/file and setting the preview panel's location to that SAS URL. Built-in web technology then renders the content. Obviously, this won't work if the user does not have the ability to generate SAS (either because key-based authentication is not available or the user does not have permission to generate user delegation keys).

This feature request is on behalf of a user who opened an Azure service request.

Start by tracing the existing simple preview flow that generates a SAS URL and sets the preview panel's location. Determine how readable blob or file data can be downloaded to a temporary location and exposed through a local file URL; done means simple previews work for users who can read the data but cannot generate SAS credentials.