Add a minimal image proxy #1
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To provide some safety when linking to user-supplied external images, we
provide a simple image proxy handler. Images accessed through this proxy
will only be served if they meet the following criteria:
- Appear to be valid image files
- Are in a permitted format: GIF, JPEG, PNG or WebP
- Do not have an excessive width or height (5000 pixels max, by default)
To serve an image through this proxy, its URL should be passed to the
handler's path as a `src` query param. The path is supplied to the
application in the `IMAGE_PROXY_PATH` environment variable.
We also provide a helper method to make forming the proxy links easier:
Thruster.image_proxy_path('https://example.com/image.jpg')
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I would suggest integrating with Active Storage instead (so no application changes would be required, just a configuration one); see, for example, https://github.com/imgproxy/imgproxy-rails |
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To provide some safety when linking to user-supplied external images, we can provide a simple image proxy handler. Images accessed through this proxy will only be served if they meet the following criteria:
To serve an image through this proxy, its URL should be passed to the handler's path as a
srcquery param. The path is supplied to the application in theIMAGE_PROXY_PATHenvironment variable.We'll also provide a helper method to make forming the proxy links easier:
This will result in a URL something like the following, which will route the image request through Thruster's proxy handler: