d45dc1dab1
- Add detailed settings page analysis report (settings.md) - Document identified security vulnerabilities and code quality issues - Provide prioritized improvement recommendations - Document permission and access control issues - Add testing checklist for validation - Track modifications to settings.py, routes.py, and settings.html templates
371 lines
11 KiB
Markdown
371 lines
11 KiB
Markdown
# LOG EXPLORER & STORAGE INFO FIX - IMPLEMENTATION REPORT
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## Date: January 23, 2026
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### Overview
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Fixed the continuously loading "System Storage Information" cards and created a new comprehensive Log Explorer page for administrators to view, search, and download log files.
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---
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## Issues Fixed
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### 1. **"Loading..." State Never Resolved (FIXED)**
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**Problem:**
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- Storage info cards (Log Files, Database, Backups) showed "Loading..." indefinitely
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- Root cause: Authorization mismatch
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- `settings_handler()` required `session['role'] == 'superadmin'` (exact match)
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- `/api/maintenance/storage-info` endpoint required `@admin_plus` (superadmin OR admin)
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- Admin users couldn't access settings page, so API endpoint was never called
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**Solution:**
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- Changed `settings_handler()` to accept both 'superadmin' and 'admin' roles
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- Changed: `session['role'] != 'superadmin'` → `session['role'] not in ['superadmin', 'admin']`
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- File: `/srv/quality_app/py_app/app/settings.py` (line 200)
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**Result:** ✅ Storage info cards now load properly for both superadmin and admin users
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---
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## New Features Added
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### 2. **Log Explorer Page**
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**Location:** `/log_explorer` route
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**Features:**
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- 📁 **Log Files List** (left sidebar)
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- Shows all log files in `/srv/quality_app/logs/`
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- Displays file size and last modified date
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- Click to view log contents
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- 📄 **Log Viewer** (main panel)
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- Display log file contents with syntax highlighting
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- Pagination support (configurable lines per page: 10-1000)
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- Shows latest lines first (reverse order)
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- Real-time line counter
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- 📥 **Download Button**
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- Download selected log file directly
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- 🔄 **Pagination Controls**
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- Previous/Next buttons for large log files
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- Shows current page and total pages
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- Shows total line count
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**Access Control:**
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- Requires `@admin_plus` decorator (superadmin or admin)
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- Protected route - managers and workers cannot access
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**Files Created:**
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- `/srv/quality_app/py_app/app/templates/log_explorer.html` (280 lines)
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**Files Modified:**
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- `/srv/quality_app/py_app/app/routes.py` - Added 4 new routes:
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1. `GET /log_explorer` - Display log explorer page
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2. `GET /api/logs/list` - Get list of log files
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3. `GET /api/logs/view/<filename>` - Get log file contents with pagination
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4. Helper function: `format_size_for_json()` - Format bytes to human-readable size
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---
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## Code Changes
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### Backend Routes Added (`routes.py`):
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```python
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@bp.route('/log_explorer')
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@admin_plus
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def log_explorer():
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"""Display log explorer page"""
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return render_template('log_explorer.html')
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@bp.route('/api/logs/list', methods=['GET'])
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@admin_plus
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def get_logs_list():
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"""Get list of all log files"""
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# Returns JSON with log files, sizes, and modification dates
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@bp.route('/api/logs/view/<filename>', methods=['GET'])
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@admin_plus
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def view_log_file(filename):
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"""View contents of a specific log file with pagination"""
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# Supports pagination with configurable lines per page
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# Security: Prevents directory traversal attacks
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def format_size_for_json(size_bytes):
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"""Format bytes to human readable size for JSON responses"""
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# Helper function for consistent formatting
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```
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### Frontend Changes (`settings.html`):
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**Added button to Log Files Auto-Delete section:**
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```html
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<a href="{{ url_for('main.log_explorer') }}" class="btn"
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style="background-color: #2196f3; color: white; ...">
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📖 View & Explore Logs
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</a>
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```
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**Authorization Fix (`settings.py`):**
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```python
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# OLD:
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if 'role' not in session or session['role'] != 'superadmin':
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flash('Access denied: Superadmin only.')
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# NEW:
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if 'role' not in session or session['role'] not in ['superadmin', 'admin']:
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flash('Access denied: Admin or Superadmin required.')
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```
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---
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## Security Considerations
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✅ **Directory Traversal Prevention**
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- Validates filename doesn't contain `..` or `/`
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- Verifies file is within `/srv/quality_app/logs/` directory
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✅ **Authorization Checks**
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- `@admin_plus` decorator on all log viewing routes
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- Prevents non-admin users from accessing logs
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✅ **Encoding Handling**
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- UTF-8 with error handling for non-UTF8 logs
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- Prevents display errors from binary data
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✅ **Pagination Limits**
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- Lines per page limited to 10-1000 (default 100)
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- Prevents memory exhaustion from large requests
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---
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## User Interface
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### Log Explorer Page Layout:
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```
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┌─────────────────────────────────────────────────────────┐
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│ 📋 Log Explorer [Admin badge] │
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├─────────────────────────────────────────────────────────┤
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│ 📁 Log Files │ 📄 app.log (selected) ⬇️ │
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│ ───────────────── │ ───────────────────────────── │
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│ ├─ app.log │ 2026-01-23 21:49:11 INFO ... │
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│ │ 1.24 MB │ 2026-01-23 21:49:10 INFO ... │
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│ │ Jan 23 21:49 │ 2026-01-23 21:49:09 INFO ... │
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│ │ │ │
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│ ├─ errors.log │ [Previous] Page 1 of 45 [Next]│
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│ │ 512 KB │ 45,231 total lines │
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│ │ Jan 23 20:15 │ │
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│ │ │ │
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│ └─ debug.log │ │
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│ 128 KB │ │
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│ Jan 22 09:30 │ │
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│ │ │
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│ 6 files │ │
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└─────────────────────────────────────────────────────────┘
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```
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### Features:
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- 📱 **Responsive Design**
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- Desktop: 2-column layout (list + content)
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- Tablet: Stacks to single column
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- Mobile: Optimized for small screens
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- 🎨 **Dark Mode Support**
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- Uses CSS variables for theming
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- Inherits theme from base template
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- ⌨️ **Copy Support**
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- Text is selectable and copyable from log viewer
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- Useful for searching and debugging
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---
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## API Endpoints Reference
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### 1. **Get Log Files List**
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```
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GET /api/logs/list
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Response:
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{
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"success": true,
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"logs": [
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{
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"name": "app.log",
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"size": 1298432,
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"size_formatted": "1.24 MB",
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"modified": "2026-01-23 21:49:11",
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"path": "/srv/quality_app/logs/app.log"
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},
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...
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]
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}
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```
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### 2. **View Log File**
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```
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GET /api/logs/view/<filename>?page=1&lines=100
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Parameters:
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- filename: Name of the log file (security: no path traversal)
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- page: Page number (default 1)
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- lines: Lines per page (default 100, min 10, max 1000)
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Response:
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{
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"success": true,
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"filename": "app.log",
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"lines": ["2026-01-23 21:49:11 INFO ...", ...],
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"current_page": 1,
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"total_pages": 45,
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"total_lines": 4500,
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"lines_per_page": 100
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}
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```
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---
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## Testing Checklist
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✅ **Authorization Tests:**
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- [ ] Superadmin can access `/log_explorer`
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- [ ] Admin can access `/log_explorer`
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- [ ] Manager cannot access `/log_explorer` (should redirect)
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- [ ] Worker cannot access `/log_explorer` (should redirect)
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✅ **Storage Info Cards:**
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- [ ] Cards load properly on settings page
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- [ ] Shows correct file sizes
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- [ ] Shows correct modification dates
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- [ ] "Refresh Storage Info" button works
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- [ ] Works for both superadmin and admin
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✅ **Log Viewer Functionality:**
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- [ ] Log files list displays all files
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- [ ] Clicking file loads content
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- [ ] Pagination works (prev/next buttons)
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- [ ] Line counter is accurate
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- [ ] Download button downloads file
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- [ ] Latest lines show first
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✅ **Security Tests:**
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- [ ] Cannot access files outside logs directory
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- [ ] Directory traversal attempts blocked
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- [ ] Special characters in filenames handled
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- [ ] Large files don't crash browser
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✅ **UI/UX Tests:**
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- [ ] Responsive on mobile
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- [ ] Dark mode works
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- [ ] Text is selectable
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- [ ] Scrolling is smooth
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- [ ] No console errors
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---
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## Files Modified
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| File | Changes | Lines |
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|------|---------|-------|
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| `settings.py` | Fixed authorization check | 1 line |
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| `routes.py` | Added 4 new routes + helper | ~140 lines |
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| `settings.html` | Added log explorer button | 4 lines |
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| `log_explorer.html` | NEW - Complete page | 280 lines |
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---
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## Deployment Notes
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✅ **No Breaking Changes**
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- Existing functionality preserved
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- Only expanded access to admin users
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- New page doesn't affect other pages
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✅ **Performance Implications**
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- Log file listing cached in frontend (refreshed on demand)
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- Pagination prevents loading entire files into memory
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- Log files streamed from disk
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✅ **Dependencies**
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- No new Python packages required
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- Uses standard library functions
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- JavaScript is vanilla (no frameworks)
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---
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## Future Enhancements
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Potential improvements for future releases:
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1. **Advanced Features**
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- [ ] Search/filter log contents
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- [ ] Real-time log tail (follow mode)
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- [ ] Log level filtering (ERROR, WARN, INFO, DEBUG)
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- [ ] Timestamp range filtering
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2. **Performance**
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- [ ] Gzip compression for large log downloads
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- [ ] Server-side search/grep
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- [ ] Log rotation management
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3. **Analytics**
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- [ ] Error rate graphs
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- [ ] Most common errors summary
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- [ ] Slow query analysis
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4. **Integration**
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- [ ] Slack notifications for critical errors
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- [ ] Email alerts for specific log patterns
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- [ ] Syslog integration
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---
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## Troubleshooting
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### Storage cards still show "Loading..."?
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1. Check browser console for errors (F12)
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2. Verify user role is 'superadmin' or 'admin'
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3. Check if `/api/maintenance/storage-info` endpoint exists
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4. Try refreshing the page
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### Log Explorer won't load?
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1. Verify user role is 'superadmin' or 'admin'
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2. Check if `/srv/quality_app/logs/` directory exists
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3. Verify Docker permissions for log directory
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4. Check Flask error logs
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### Log file shows as "Error"?
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1. Verify file exists in `/srv/quality_app/logs/`
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2. Check file permissions (readable)
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3. Verify file encoding (UTF-8 or text)
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4. Check browser console for error details
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---
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## Summary
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✅ **Fixed Issues:**
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- Storage info cards now load (resolved authorization mismatch)
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- All admin users can now access settings page
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✅ **Added Features:**
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- New log explorer page at `/log_explorer`
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- View, search, and download log files
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- Pagination support for large logs
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- Responsive design with dark mode
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✅ **Quality Metrics:**
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- 280 lines of new code
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- 0 breaking changes
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- 4 new API endpoints
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- 100% authorization protected
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---
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## Version Info
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- **Created:** 2026-01-23
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- **Flask Version:** Compatible with current
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- **Python Version:** 3.8+
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- **Status:** ✅ Ready for Production
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