[GitHub] [lucene-solr] janhoy opened a new pull request #1014: SOLR-13905 Fix AuditEvent NPE

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janhoy opened a new pull request #1014: SOLR-13905 Fix AuditEvent NPE
URL: https://github.com/apache/lucene-solr/pull/1014
 
 
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   # Description
   
   Got NPE for some Audit events such as early errors, due to the way we constructed the resource variable from `httpRequest.getPathInfo()`, which could return null in some environments. Sadly it does not return null in our test env, but on a real server it does.
   
   Also, around the code that triggered the NPE we looped through a bunch of REGEX strings and compiled each one for every request.
   
   # Solution
   
   Solution is to always start with `httpRequest.getServletPath()` which always returns something, and then concatenate `getPathInfo()` if it is non-null.
   
   The Path-to-RequestType guessing logic now uses compiled static RegEx Patterns for speed, and also is null-safe in that it explicitly checks.
   
   # Tests
   
   The test does not prove the NPE, but it tests an ERROR case that is correctly classified as ADMIN.
   
   # Checklist
   
   Please review the following and check all that apply:
   
   - [x] I have reviewed the guidelines for [How to Contribute](https://wiki.apache.org/solr/HowToContribute) and my code conforms to the standards described there to the best of my ability.
   - [x] I have created a Jira issue and added the issue ID to my pull request title.
   - [x] I am authorized to contribute this code to the ASF and have removed any code I do not have a license to distribute.
   - [x] I have given Solr maintainers [access](https://help.github.com/en/articles/allowing-changes-to-a-pull-request-branch-created-from-a-fork) to contribute to my PR branch. (optional but recommended)
   - [x] I have developed this patch against the `master` branch.
   - [x] I have run `ant precommit` and the appropriate test suite.
   - [x] I have added tests for my changes.
   - [ ] I have added documentation for the [Ref Guide](https://github.com/apache/lucene-solr/tree/master/solr/solr-ref-guide) (for Solr changes only).
   

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