opus files are downloaded as octet-stream

[masewo]

Describe the bug
Files with content type audio/ogg; codecs=opus are downloaded as application/octet-stream.
The content type does not pass the regex check in the unrounted_handler.go.

To Reproduce
Steps to reproduce the behavior:

1. Upload an opus file
2. Download this file
3. See content type

Expected behavior
The content type is audio/ogg; codecs=opus.

Setup details
Please provide following details, if applicable to your situation:

• Operating System: Windows
• Used tusd version: 2.5.0
• Used tusd data storage: disk store
• Used tusd configuration: Go
• Used tus client library: Uppy.js

[Acconut]

That's correct. Additional parameters in the media type are currently not allowed. Would you be interested in a PR for extending the regular expression to allow the syntax specified in https://httpwg.org/specs/rfc9110.html#media.type?

Alternatively, we could also consider moving away from the regular expression entirely and instead use Go's builtin media type parser: https://pkg.go.dev/mime#ParseMediaType. The benefit is that we do not have to maintain a complex regular expression that might be incompatible with the actual specs.

If the parsing fails, we would use application/octet-stream. Otherwise, we set Content-Disposition depending on whether the media type is allowed to be displayed inline or not.

What do you think?