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download_endpoint: Adds support for expiring URLs #708

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download_endpoint: Adds support for expiring URLs #708

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davidwessman
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@davidwessman davidwessman commented Oct 4, 2024 •
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  • Adds expires_in and secret_key to download_endpoint plugin
  • This allows calling attachment.download_url(expires_in: 5 * 60)
    to generate a URL including signature and expires_at as query parameters. The timestamp is included in the signature and will only work before that timestamp.
  • The URL is signed and verified with HMAC with SHA256 digest.

@davidwessman
download_endpoint: Adds support for expiring URLs
41e6767 
- Adds `expires_in` and `verifier_secret` to `download_endpoint` plugin
- This allows calling `attachment.download_url(expires_in: 5 * 60)`
  to generate a URL that expires in 5 minutes.
- The URL is signed and verified with ActiveSupport::MessageVerifier.
@adam12
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adam12 commented Oct 4, 2024

I suspect the use of AS::Verifier is going to be an issue. We might need to go with OpenSSL::HMAC directly.

@davidwessman
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I suspect the use of AS::Verifier is going to be an issue. We might need to go with OpenSSL::HMAC directly.

I'll try it out 🙂

@janko
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janko commented Oct 4, 2024

Yes, Shrine doesn't depend on Active Support, so I want to avoid it if possible, even as an optional dependency. The derivation_endpoint plugin has URL signing implemented using OpenSSL::HMAC, so you can take a look there.

@davidwessman
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Now I rewrote it to use OpenSSL-directly 🙂
Not sure if some of this functionality should be extracted to the UrlSigner class.

adam12
adam12 reviewed Oct 8, 2024
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Nicely done adapting it for OpenSSL::HMAC. Few comments but overall looks good IMHO. Will leave final sign-off for Janko ofc.

test/plugin/download_endpoint_test.rb Show resolved Hide resolved
test/plugin/download_endpoint_test.rb Outdated Show resolved Hide resolved
@davidwessman
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@janko could you allow the tests to run? They crash on my side because of libmagic

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@janko janko Awaiting requested review from janko

@adam12 adam12 Awaiting requested review from adam12

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@davidwessman @adam12 @janko