[keycloak-dev] Trailing slash

Stian Thorgersen sthorger at redhat.com
Wed Feb 20 09:34:01 EST 2019

That is some strange behaviour and I agree "/path/" is not the same as
"/path" so this is an invalid rewrite of the URL.

On Wed, 20 Feb 2019 at 14:50, Sebastian Laskawiec <slaskawi at redhat.com>

> Hey guys,
> I'm working on migrating Jetty adapters to our base testsuite at the moment
> and I noticed an interesting problem.
> The URLProvider is responsible for adjusting injected URLs into the Page
> objects. One of the things it does is trimming the trailing slash out, so
> that "http://localhost:8280/client-secret-jwt-secure-portal/" becomes "
> http://localhost:8280/client-secret-jwt-secure-portal". We depend on this
> functionality a lot in our testsuite when constructing all kind of
> assertions that include myPage.getInjectedUrl().toString(). In other words,
> if we inject a URL with a trailing slash, there will be quite a lot of test
> that fail.
> Trailing space at the end is not meaningless unfortunately. It is being
> used by the container to find proper context. Here's one of the best
> explanations I found so far [1].
> Jetty enforces trailing slashes for Servlets deployed in the container. If
> you hit a Servlet without a slash (
> http://localhost:8280/client-secret-jwt-secure-portal for example), you
> will be redirected (with HTTP 302) to a version that has it (
> http://localhost:8280/client-secret-jwt-secure-portal/). This of course
> breaks some of the tests in our testsuite (since the Resteasy HTTP Engine
> doesn't follow redirects by default). It is also worth to mention, that
> Arquillian also adds trailing slash at the end of the Servlet context [2].
> So by default, it injects all URLs with trailing space.
> My take on this is that we should not trim the trailing slash. Moreover, we
> should never manipulate a raw string representation of a URL. What we
> should do instead is to use URI#resolve method if we need to query
> sub-contexts. Using URI instead of URL is extremely important when it comes
> to equality (if you're interested more in this, please read [3]).
> If you agree with me, I'll go ahead and create a JIRA for it.
> Thanks,
> Sebastian
> [1]
> https://stackoverflow.com/questions/37370407/how-to-remove-trailing-slash-from-embedded-jetty-urls/37485104#37485104
> [2]
> See
> org.jboss.arquillian.container.spi.client.protocol.metadata.Servlet#getBaseURIAsString
> method
> [3] http://blog.markfeeney.com/2010/11/java-uri-vs-url.html
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