ReplacePathRegex - Allow Empty String for replacement

[danhlee329]

Welcome!

• Yes, I've searched similar issues on GitHub and didn't find any.
• Yes, I've searched similar issues on the Traefik community forum and didn't find any.

What did you expect to see?

Currently using v2.10.7, would like to request passing in an empty string for the replacement entry for the ReplacePathRegex middleware. At the moment, I see that it requires the replacement entry to not be empty (with it trimmed first).

Main use case for this request is to remove any trailing slashes from the path without having to redirect (EDIT: it is acceptable to only remove the first trailing-slash for us):

http:
  middlewares:
    remove-trailing-slash-from-path:
      replacepathregex:
        regex: "/$"
        replacement: ""

Some points around the request/confusion:

• In the current documentation for the middleware, the field replacement doesn't mention that it needs to be non-empty or non-white space
• When testing out the values in Regex101 and in Go Playground (noted in the Tips section in the docs), the replacement works as intended (i.e., trailing slash removed)
• Looks like keepTrailingSlash was deprecated some time ago + haven't found any answers or solutions to support current use case in the Community Boards

Any Traefik-ers have suggestions around how to do this with the latest version of Traefik, it'll be greatly appreciated, would like this to be considered as a feature request, thanks!

[rtribotte]

Hello @danhlee329,

Thanks for opening this!

#10538 is opened to fix this issue.

[danhlee329]

Hello @danhlee329,

Thanks for opening this!

#10538 is opened to fix this issue.

Awesome, thank you @rtribotte!

[traefiker]

Closed by #10538.