Extended class for working around #10319

ContextPathAwareInterceptor.groovy

import grails.artefact.Interceptor
import groovy.transform.CompileStatic

import javax.servlet.http.HttpServletRequest

/**
 * Workaround for https://github.com/grails/grails-core/issues/10319
 *
 * Allows an interceptor to behave properly when server.contextPath is set
 */
@CompileStatic
trait ContextPathAwareInterceptor extends Interceptor {

    @Override
    boolean doesMatch(HttpServletRequest request) {
        super.doesMatch(new ContextPathRemovingRequestWrapper(originalRequest: request))
    }

    /**
     * Wrapper that intercepts the request URI and removes the context path
     */
    static class ContextPathRemovingRequestWrapper implements HttpServletRequest {
        @Delegate HttpServletRequest originalRequest

        @Override
        String getRequestURI() {
            originalRequest.requestURI - contextPath
        }
    }
}

Graeme doesn't like me to contribute and has blocked me so I thought I would add here...

Very easy fix if you do something like this...

String entryPoint = "/api/v${Metadata.current.getProperty(Metadata.APPLICATION_VERSION, String.class)}"

ContextPathAwareInterceptor(){
	match(uri:"/${entryPoint}/**")
}

... or something like that. I have had to work this into alot of what I do and this works great and provides the fastest response.

You just have to separate out as a variable first, then match it.

In this case. if my APPLICATION_VERSION was '0.1', it would match on 'api/v0.1'

That doesn't seem to address the case where the server.contextPath is set in config. The value of entryPoint will still be checked against a string that still contains the contextPath. Am I missing something?

No I think I was mistaken. So by subtracting the contextPath, are you trying to match on:

scheme + "://" + serverName + ((includePort) ? (":" + serverPort) : "")

??? Because the forwardUri == contextPath effectively. The above would give you a blank string (as far as I know).

What are you try for as an outcome?