Amazon S3 Redirect Rule - Preserve Query Params

The problem was that I had the origin set up in CloudFront not to forward Query Strings so when S3 got the request it would redirect properly without the query params. You can find this setting in CloudFront > Behaviors > Forward Query Strings.

If you want to have clear urls though you can also check out this trick. You need to setup cloudfront distribution and then alter 404 behaviour in "Error Pages" section of your distribution. That way you can again domain.com/foo/bar links :)

The menus and options in CloudFront/S3 change a lot over time.

Here is a December 2021 solution.

Step 1) Create a "Request" Policy in CloudFront that allows QueryStrings

Note: you might want to also add some Headers like Origin or Access-Control-... headers for CORS.

Step 2) Go to your Distribution > Update the Origin request policy

Step 3) Kick a new Invalidation on /*

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Additional Notes for Debuging/Testing

1. I would recommend testing with curl in terminal rather than a browser to avoid caching and also seeing the details. I do curl -v https://example.com/cb?foo=bar1.
2. Keep increasing the value of the query string (bar1 in the above example, to bar2, bar3) with every test to make such there is no caching again.