Feature request: Presign Google Urls

[baszalmstra]

I noticed that the GCS backend is missing pre signing URLs. I think it should be relatively trivial to add with reqsign already being used there. I'll get around to making a PR at some point, but I thought Id already leave an issue here for future reference.

[Xuanwo]

Sounds great!

But presign google URLs is a bit more complex than expected. The current signing logic uses google's JSON API along with OAuth2 Token which can't do presign. We need to add V4 API support which silimiar to AWS Sigv4: https://cloud.google.com/storage/docs/access-control/signed-urls

[wolfv]

I think the algorithm is pretty much exactly like AWS V4. The official docs have an example that uses RSA-SHA256 for signing, but HMAC-SHA256 seems also available (https://cloud.google.com/storage/docs/authentication/signatures) which means that no additional dependencies should be needed.

I've started to copy over the aws v4 file and tried to make the adjustments for google::v4 but haven't tackled the config loader part yet :)

[Xuanwo]

I have assign this issue to @wolfv & @baszalmstra. Any problems you encounter can be communicated here and I am willing to help ❤️

[Xuanwo]

Hi, @wolfv & @baszalmstra, presign support for gcs has been added now! Are you still willing to use this feature?

[wolfv]

We are definitely using this feature :) thanks!

One other feature we've been looking for is the ability to attach arbitrary metadata to files. Are there plans for that?

[Xuanwo]

One other feature we've been looking for is the ability to attach arbitrary metadata to files. Are there plans for that?

Are you talking about #2013?

[wolfv]

yes, exactly! Hadn't seen that issue a couple weeks ago! :)