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add "valid until" option to limit lifetime of signed requests

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Closes #222

Co-authored-by: Will Norris <will@willnorris.com>
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sl 2020-03-04 18:18:47 +01:00 • committed by Will Norris
parent b98b3455a1
commit fe35d19c3e
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@ -312,6 +312,14 @@ If both a whiltelist and signatureKey are specified, requests can match either.
In other words, requests that match one of the allowed hosts don't necessarily
need to be signed, though they can be.
To limit how long a URL is valid (particularly useful for signed URLs),
you can specify a "valid until" time using the `vu` option with a Unix timestamp.
For example, the following signed URL would only be valid until 2020-01-01:
```
http://localhost:8080/vu1577836800,sjNcVf6LxzKEvR6Owgg3zhEMN7xbWxlpf-eyYbRfFK4A=/https://example.com/image
```
### Default Base URL
Typically, remote images to be proxied are specified as absolute URLs.