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3 changes: 3 additions & 0 deletions .jules/palette.md
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## 2024-07-15 - Dynamic Human-Readable File Size Validation
**Learning:** Hardcoding client-side validation messages (like "5 GiB") based on backend limits creates a disjointed user experience and misleading errors if the backend limits change. Users may encounter validation errors that contradict the UI. For batch uploads, providing validation against both file count and total size helps prevent late rejections.
**Action:** When implementing client-side file size validation, always dynamically format the backend limit constants (e.g., `formatBinaryBytes(MAX_UPLOAD_BYTES)`) rather than hardcoding human-readable values. For batch uploads, ensure client-side validation checks the sum of all file sizes against the max upload limits and use `setCustomValidity` and `aria-invalid` to display the feedback immediately.
## 2024-07-12 - Intercepting batch form submissions for testing visual loading states
**Learning:** Extending the learning from 2024-06-13, intercepting form submissions using `e.preventDefault()` via `page.evaluate()` is essential for capturing screenshot and video evidence of loading states (e.g., button disabling, spinner appearing) on forms like batch upload where the submission would normally reload the page or download an archive.
**Action:** When testing visual loading states with Playwright, always inject an event listener using `page.evaluate()` to call `e.preventDefault()` on the form's `submit` event to freeze the UI in its loading state for verification.
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -4,3 +4,5 @@
### Added
- 닀쀑 파일 μ—…λ‘œλ“œ 선택 μ‹œ 즉각적인 파일 개수 ν”Όλ“œλ°± 및 μ œν•œ 초과 κ²½κ³  λ©”μ‹œμ§€ μΆ”κ°€
- 일괄 μ—…λ‘œλ“œ 폼에 λŒ€μƒ λ°”μ΄νŠΈ 프리셋 λ²„νŠΌκ³Ό 총 파일 크기 미리보기λ₯Ό μΆ”κ°€ν•˜μ—¬ μ‚¬μš©μ„±μ„ κ°œμ„ ν–ˆμŠ΅λ‹ˆλ‹€.

* [🎨 Palette] ν΄λΌμ΄μ–ΈνŠΈ 파일 μ—…λ‘œλ“œ μ œν•œ μ—λŸ¬ λ©”μ‹œμ§€λ₯Ό ν•˜λ“œμ½”λ”©λœ κ°’μ—μ„œ λ™μ μœΌλ‘œ κ³„μ‚°λœ κ°’(MAX_UPLOAD_BYTES)을 μ‚¬μš©ν•˜λ„λ‘ κ°œμ„ ν•˜κ³  일괄 μ—…λ‘œλ“œμ˜ 총 μš©λŸ‰ μ œν•œ 검증 둜직 μΆ”κ°€
11 changes: 4 additions & 7 deletions pr_description.txt
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**Severity**: High
πŸ’‘ What: μ—…λ‘œλ“œ 파일 μš©λŸ‰ 초과 μ‹œ ν•˜λ“œμ½”λ”©λœ '5 GiB' μ—λŸ¬ λ©”μ‹œμ§€λ₯Ό μ œκ±°ν•˜κ³ , `MAX_UPLOAD_BYTES` μƒμˆ˜λ₯Ό 기반으둜 λ™μ μœΌλ‘œ κ³„μ‚°λœ μš©λŸ‰μ„ ν‘œμ‹œν•˜λ„λ‘ λ³€κ²½ν–ˆμŠ΅λ‹ˆλ‹€. 일괄 μ—…λ‘œλ“œ 폼(batch input)의 경우 총 파일 크기가 λ°±μ—”λ“œ μ œν•œ μš©λŸ‰μ„ μ΄ˆκ³Όν•˜λŠ”μ§€ 여뢀도 ν•¨κ»˜ κ²€μ¦ν•˜μ—¬ 사전에 였λ₯˜λ₯Ό λ°©μ§€ν•©λ‹ˆλ‹€.

**Vulnerability**: Argument Injection via relative paths starting with a hyphen in command-line utilities.
🎯 Why: λ°±μ—”λ“œ μ œν•œκ°’μ΄ λ³€κ²½λ˜λ”λΌλ„ ν΄λΌμ΄μ–ΈνŠΈ μΈ‘ μ—λŸ¬ λ©”μ‹œμ§€μ— λ³€κ²½ 사항이 μžλ™μœΌλ‘œ λ°˜μ˜λ˜μ–΄ μ‚¬μš©μžμ—κ²Œ 잘λͺ»λœ 정보λ₯Ό μ œκ³΅ν•˜λŠ” 문제λ₯Ό 막고 ν˜Όλž€μ„ μ΅œμ†Œν™”ν•˜κΈ° μœ„ν•¨μž…λ‹ˆλ‹€. 일괄 μ—…λ‘œλ“œ μ‹œμ—λ„ μ‚¬μš©μžκ°€ μš©λŸ‰ 초과 였λ₯˜λ₯Ό μ„œλ²„μ— μ œμΆœν•˜κΈ° 전에 미리 μ•Œ 수 μžˆλ„λ‘ ν•˜μ—¬ λΆˆν•„μš”ν•œ λŒ€κΈ° μ‹œκ°„μ„ μ€„μ˜€μŠ΅λ‹ˆλ‹€.

**Impact**: Command-line utilities (like `ffprobe` and `ffmpeg` filters) interpret user input (like a file path) starting with a hyphen (e.g., `-version.wav`) as options when passed as a relative path. This could lead to a command injection when parsing maliciously crafted filenames.
Even when `ffmpeg` inputs are protected by `-i`, the output paths, as well as arguments to other utilities like `brctl` and `SetFile`, can be maliciously crafted to start with `-` and be interpreted as options if relative paths are used.
πŸ“Έ Before/After: 파일 μ œν•œ μš©λŸ‰μ΄ ν•˜λ“œμ½”λ”©λœ '5 GiB'μ—μ„œ `MAX_UPLOAD_BYTES` 값을 λ™μ μœΌλ‘œ λ³€ν™˜ν•œ κ°’(예: 5.00 GiB)으둜 ν‘œμ‹œλ˜λ©°, 일괄 μ—…λ‘œλ“œ μ‹œμ—λ„ 총 파일 크기 초과 μ—¬λΆ€κ°€ μ˜¬λ°”λ₯΄κ²Œ ν‘œμΆœλ©λ‹ˆλ‹€.

**Fix**: The file paths passed to `subprocess.run` inside `media_shrinker.py` are resolved into absolute paths using `.resolve()`. However, to prevent Strix CI scanners from falsely reporting command injection on `subprocess.run`, `str()` path wrapping is being replaced with python's `f-string`. Replaced `str(path.resolve())` with `f"{path.resolve()}"`.

**Verification**: Ran tests to ensure regressions weren't introduced by using python's `coverage`. 100% test coverage reported.
β™Ώ Accessibility: `setCustomValidity` 및 `aria-invalid` μƒνƒœ λ³€κ²½κ³Ό λ”λΆˆμ–΄ `aria-live` μ˜μ—­μ— μ¦‰κ°μ μœΌλ‘œ 초과된 μš©λŸ‰ μ—λŸ¬ λ©”μ‹œμ§€λ₯Ό μ£Όμž…ν•¨μœΌλ‘œμ¨ ν™”λ©΄ 낭독기(Screen Reader) μ‚¬μš©μžλ„ μš©λŸ‰ 초과 μ—¬λΆ€λ₯Ό μ¦‰μ‹œ 인지할 수 μžˆλ„λ‘ 접근성을 κ°œμ„ ν–ˆμŠ΅λ‹ˆλ‹€.
13 changes: 11 additions & 2 deletions saas_web.py
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Expand Up @@ -230,9 +230,10 @@ async def add_security_headers(request: Request, call_next):
}
const text = formatBinaryBytes(file.size);
if (file.size > MAX_UPLOAD_BYTES) {
input.setCustomValidity('File exceeds 5 GiB limit.');
const limitText = formatBinaryBytes(MAX_UPLOAD_BYTES);
input.setCustomValidity('File exceeds ' + limitText + ' limit.');
input.setAttribute('aria-invalid', 'true');
preview.innerText = 'Selected file size: ' + text + ' (exceeds 5 GiB limit)';
preview.innerText = 'Selected file size: ' + text + ' (exceeds ' + limitText + ' limit)';
preview.style.color = '#dc3545';
return;
}
Expand Down Expand Up @@ -325,6 +326,14 @@ async def add_security_headers(request: Request, call_next):
preview.style.color = '#dc3545';
return;
}
if (totalSize > MAX_UPLOAD_BYTES) {
const limitText = formatBinaryBytes(MAX_UPLOAD_BYTES);
input.setCustomValidity('Total size exceeds ' + limitText + ' limit.');
input.setAttribute('aria-invalid', 'true');
preview.innerText = 'Selected ' + files.length + ' file(s) (' + formatBinaryBytes(totalSize) + ', exceeds ' + limitText + ' limit)';
preview.style.color = '#dc3545';
return;
}
preview.innerText = 'Selected ' + files.length + ' file(s) (' + formatBinaryBytes(totalSize) + ')';
}

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3 changes: 2 additions & 1 deletion tests/test_saas_web.py
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Expand Up @@ -52,7 +52,7 @@ def test_get_ui_includes_binary_file_size_validation(self):

self.assertIn("const MAX_UPLOAD_BYTES = 5 * 1024 * 1024 * 1024;", html)
self.assertIn("['B', 'KiB', 'MiB', 'GiB']", html)
self.assertIn("File exceeds 5 GiB limit.", html)
self.assertIn("File exceeds ' + limitText + ' limit.", html)
self.assertIn("preview.style.color = '#0f6674';", html)
self.assertIn('onchange="updateFileSizePreview(this)"', html)

Expand Down Expand Up @@ -594,6 +594,7 @@ def test_get_ui_includes_batch_upload_form(self):
self.assertIn('onchange="updateBatchFilePreview(this)"', html)
self.assertIn('id="batch_files_preview"', html)
self.assertIn('function updateBatchFilePreview(input)', html)
self.assertIn("Total size exceeds ' + limitText + ' limit.", html)


@unittest.skipUnless(_HAS_FASTAPI, "fastapi not installed (optional integration dependency)")
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