ServletContext.getResourcePaths() does not return all matching resources with Undertow

[wilkinsona]

Our CompositeResourceManager only works property for ServletContext.getResource(). For ServletContext.getResourcePaths() the search stops as soon as the first delegate ResourceManager returns a non-null Resource. As a result, any resource paths that would have been provided by any subsequent ResourceManagers are lost.

[wilkinsona]

A secondary problem is that Undertow's URLResource, which we use when running a packaged jar or war, only supports listing resources in a directory for file: URLs. This means that directories within a jar or war cannot be listed.

[wilkinsona]

This is blocked at the moment as Undertow's ServletContext implementation filters out any resources that are not available on the file system in its getResourcePaths() method. I've opened UNDERTOW-1561.

[wilkinsona]

There's been no movement on the Undertow issue in the 2.5 months since it was opened. I'm going close this one for now. We can re-open it if there's movement on the Undertow side and if changes in Spring Boot are still necessary.