🛡️ Sentinel: [MEDIUM] Fix Exception handling and empty dir name fallback

[seonghobae]

🚨 Severity: MEDIUM
💡 Vulnerability: getPathMatcher can throw IllegalArgumentException causing DoS. Also, processing root directories results in empty titles/h1s which can lead to accessibility issues and potential information disclosure if absolute paths are used as fallbacks.
🎯 Impact: An attacker can cause an application crash (DoS) via malformed glob patterns in .html4ignore. Additionally, poor handling of empty directory names harms accessibility and increases information disclosure risks.
🔧 Fix: Catch Exception broadly when compiling glob patterns, and provide a safe static fallback ("/") for empty directory names.
✅ Verification: Ensure testProcessDirEmptyNameFallback test passes and manually verify that invalid glob patterns do not crash the program.

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PR created automatically by Jules for task 15821860853775198300 started by @seonghobae

Summary by CodeRabbit

• 버그 수정

  • 잘못된 .html4ignore 패턴으로 인해 프로그램이 중단되는 문제를 수정했습니다.
  • 파일 시스템 루트에서 경로가 비정상적으로 표시되거나 정보가 노출될 수 있는 문제를 완화했습니다.
  • 빈 디렉터리 이름에서도 index.html이 올바르게 생성되도록 개선했습니다.

• 테스트

  • 잘못된 패턴과 빈 경로 처리에 대한 검증을 추가했습니다.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: d12c53f1-bdd9-4629-b95a-f95335b5995a

📥 Commits

Reviewing files that changed from the base of the PR and between 231d391 and e7745f3.

📒 Files selected for processing (1)

• src/test/kotlin/html4tree/GlobTest.kt

📝 Walkthrough

Walkthrough

.html4ignore 패턴 파싱이 모든 예외를 처리하도록 변경되었습니다. 빈 디렉터리 이름에는 / fallback을 적용했습니다. 관련 동작을 검증하는 테스트와 대응 문서를 추가했습니다.

Changes

경로 처리 변경

Layer / File(s)	Summary
ignore 패턴 예외 처리 .jules/sentinel.md, src/main/kotlin/html4tree/main.kt	.html4ignore 패턴 생성에서 특정 예외뿐 아니라 모든 예외를 무시하도록 변경했습니다. 관련 대응 내용을 문서에 기록했습니다.
디렉터리 이름 fallback 및 검증 src/main/kotlin/html4tree/main.kt, src/test/kotlin/html4tree/GlobTest.kt	빈 디렉터리 이름에 /를 사용하고 HTML <title>과 <h1>에 적용했습니다. 잘못된 ignore 파일과 빈 이름 fallback을 검증하는 테스트를 추가했습니다.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	제목은 잘못된 예외 처리와 빈 디렉터리 이름 fallback이라는 주요 변경 사항을 정확하고 간결하게 설명합니다.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch sentinel/fix-path-matcher-and-empty-dir-15821860853775198300

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/test/kotlin/html4tree/GlobTest.kt`:
- Around line 27-39: Update testFallbackInlinedEmpty to use a valid temporary
directory and fail on process_dir errors instead of swallowing Exception, then
assert the generated index.html contains the expected empty-name fallback HTML
for “/”. Extend testDirNameFallbackNormal to verify the generated <h1> also
contains the escaped directory name alongside the existing <title> assertion,
using JUnit 4 test behavior.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 0eeb53c6-f8d2-41bd-95af-603791f599e1

📥 Commits

Reviewing files that changed from the base of the PR and between efde64c and 231d391.

📒 Files selected for processing (3)

• .jules/sentinel.md
• src/main/kotlin/html4tree/main.kt
• src/test/kotlin/html4tree/GlobTest.kt