yuqi1129 opened a new pull request, #11034:
URL: https://github.com/apache/gravitino/pull/11034
### What changes were proposed in this pull request?
Add a null guard for `HttpServletRequest#getRequestURI()` in `WebUIFilter`.
When the request URI is null, the filter now passes the request through the
filter chain instead of trying to rewrite it to a Web UI static resource.
This PR also adds a unit test covering the null URI path.
### Why are the changes needed?
`WebUIFilter` previously called `path.lastIndexOf("/")` without checking
whether `path` was null. If `getRequestURI()` returned null, the request failed
with a `NullPointerException` and Jetty returned 500.
Fix: #11029
### Does this PR introduce _any_ user-facing change?
No API or configuration changes. Malformed or proxy-affected requests with a
null request URI no longer fail in `WebUIFilter` with an NPE.
### How was this patch tested?
```bash
./gradlew :server:spotlessApply
./gradlew :server:test --tests
org.apache.gravitino.server.web.ui.WebUIFilterTest -PskipITs
```
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