Allow null resource base in ResourceFileServlet with Jetty 12 #334
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In
com.google.apphosting.runtime.jetty9.ResourceFileServlet
we were able to have a nullresourceBase
in the case thatcontext.getResource(URIUtil.SLASH + appVersion.getPublicRoot())
returned null.However in Jetty 12 the
ResourceFactory#newResource
method will throw IAE if the given URL is null.This PR restores the same behavior by allowing
ResourceFileServlet
to have a nullresourceBase
for the Jetty 12 based runtimes.