Add URL whitelist enforcement for Kiosk-mode and enhance configuration management
- Introduced `allowed_urls` in configuration to specify whitelisted domains/patterns. - Implemented `RestrictedWebEngineView` to enforce URL restrictions in the web view. - Updated `MainWindow` to utilize the new restricted web view and added navigation toolbar. - Enhanced unit tests for configuration and restricted web view to cover new functionality.
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6 changed files with 529 additions and 33 deletions
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@ -50,6 +50,7 @@ class Config:
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app_version: str
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log_level: str
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allowed_roots: List[Path]
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allowed_urls: List[str] # Empty = no restriction, non-empty = Kiosk-mode
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webapp_url: str
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window_width: int
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window_height: int
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@ -62,11 +63,16 @@ class Config:
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allowed_roots_str = os.getenv("ALLOWED_ROOTS", "Z:/,C:/Users/Public")
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allowed_roots = [Path(p.strip()) for p in allowed_roots_str.split(",")]
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# URL whitelist (empty = no restriction)
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allowed_urls_str = os.getenv("ALLOWED_URLS", "")
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allowed_urls = [url.strip() for url in allowed_urls_str.split(",") if url.strip()]
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return cls(
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app_name=os.getenv("APP_NAME", "WebDrop Bridge"),
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app_version=os.getenv("APP_VERSION", "1.0.0"),
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log_level=os.getenv("LOG_LEVEL", "INFO"),
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allowed_roots=allowed_roots,
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allowed_urls=allowed_urls,
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webapp_url=os.getenv("WEBAPP_URL", "file:///./webapp/index.html"),
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window_width=int(os.getenv("WINDOW_WIDTH", "1024")),
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window_height=int(os.getenv("WINDOW_HEIGHT", "768")),
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@ -75,9 +81,16 @@ class Config:
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```
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**Deliverables:**
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- [ ] `src/webdrop_bridge/config.py` - Configuration management
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- [ ] `.env.example` - Environment template
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- [ ] Validation for all config parameters
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- [x] `src/webdrop_bridge/config.py` - Configuration management
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- [x] `.env.example` - Environment template
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- [x] Validation for all config parameters
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**Configuration Variables:**
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- `ALLOWED_ROOTS` - Comma-separated file paths (drag-drop whitelist)
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- `ALLOWED_URLS` - Comma-separated URL patterns for Kiosk-mode (empty = unrestricted)
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- Examples: `localhost,127.0.0.1,*.example.com`
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- Supports wildcards: `*.domain.com`
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- File URLs always allowed: `file://`
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**Acceptance Criteria:**
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- Config loads from `.env` file
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@ -256,16 +269,21 @@ class DragInterceptor(QWidget):
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#### 1.3.1 Main Window (`src/webdrop_bridge/ui/main_window.py`)
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**Features:**
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- Qt QMainWindow with WebEngine integration
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- Navigation toolbar (Home, Back, Forward, Refresh) for Kiosk-mode
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- URL whitelist enforcement for restricted browsing
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- Drag-and-drop file path integration
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```python
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from PySide6.QtWidgets import QMainWindow, QVBoxLayout, QWidget
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from PySide6.QtWebEngineWidgets import QWebEngineView
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from PySide6.QtCore import QUrl
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from PySide6.QtWidgets import QMainWindow, QVBoxLayout, QWidget, QToolBar
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from PySide6.QtCore import QUrl, QSize, Qt
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import logging
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logger = logging.getLogger(__name__)
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class MainWindow(QMainWindow):
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"""Application main window."""
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"""Application main window with restricted browsing."""
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def __init__(self, config):
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super().__init__()
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@ -273,9 +291,10 @@ class MainWindow(QMainWindow):
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self.setWindowTitle(config.app_name)
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self.setGeometry(100, 100, config.window_width, config.window_height)
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# Create web engine view
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self.web_view = QWebEngineView()
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self._configure_web_engine()
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# Create restricted web engine view (with URL whitelist)
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from webdrop_bridge.ui.restricted_web_view import RestrictedWebEngineView
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self.web_view = RestrictedWebEngineView(config.allowed_urls)
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self._create_navigation_toolbar()
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# Set as central widget
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self.setCentralWidget(self.web_view)
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@ -283,27 +302,96 @@ class MainWindow(QMainWindow):
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logger.info(f"Loading webapp from: {config.webapp_url}")
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self.web_view.load(QUrl(config.webapp_url))
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def _configure_web_engine(self):
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"""Configure WebEngine settings for local file access."""
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settings = self.web_view.settings()
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from PySide6.QtWebEngineCore import QWebEngineSettings
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def _create_navigation_toolbar(self):
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"""Create Kiosk-mode navigation toolbar."""
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toolbar = QToolBar("Navigation")
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toolbar.setMovable(False)
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toolbar.setIconSize(QSize(24, 24))
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self.addToolBar(Qt.ToolBarArea.TopToolBarArea, toolbar)
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settings.setAttribute(
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QWebEngineSettings.LocalContentCanAccessFileUrls, True
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)
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settings.setAttribute(
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QWebEngineSettings.LocalContentCanAccessRemoteUrls, False
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)
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# Add Back, Forward, Home, Refresh buttons
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toolbar.addAction(self.web_view.pageAction(self.web_view.WebAction.Back))
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toolbar.addAction(self.web_view.pageAction(self.web_view.WebAction.Forward))
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toolbar.addSeparator()
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home_action = toolbar.addAction("Home")
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home_action.triggered.connect(self._navigate_home)
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toolbar.addAction(self.web_view.pageAction(self.web_view.WebAction.Reload))
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def _navigate_home(self):
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"""Navigate to home (startup) URL."""
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self.web_view.load(QUrl(self.config.webapp_url))
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```
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**URL Whitelist (Kiosk-Mode):**
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When `ALLOWED_URLS` is configured, the application enforces strict browsing:
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- ✅ Whitelisted URLs load in the WebView
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- ❌ Non-whitelisted URLs open in system default browser
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- ✅ File URLs (`file://`) always allowed
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- ✅ Empty whitelist = unrestricted (all URLs allowed)
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**Deliverables:**
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- [ ] `src/webdrop_bridge/ui/main_window.py`
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- [ ] UI tests
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- [x] `src/webdrop_bridge/ui/main_window.py`
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- [x] `src/webdrop_bridge/ui/restricted_web_view.py` - URL whitelist enforcement
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- [x] UI tests
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**Acceptance Criteria:**
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- Window opens with correct title
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- WebEngine loads correctly
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- Responsive to resize events
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- Toolbar displays with Home, Back, Forward, Refresh buttons
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- URL whitelist enforces restrictions
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- Non-whitelisted URLs open in system browser
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---
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#### 1.3.2 Restricted Web View (`src/webdrop_bridge/ui/restricted_web_view.py`)
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**Purpose:** Enforce URL whitelist for Kiosk-mode browsing security.
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```python
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from PySide6.QtWebEngineWidgets import QWebEngineView
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from PySide6.QtGui import QDesktopServices
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import fnmatch
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class RestrictedWebEngineView(QWebEngineView):
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"""Web view with URL whitelist enforcement."""
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def __init__(self, allowed_urls: List[str] = None):
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super().__init__()
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self.allowed_urls = allowed_urls or []
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self.page().navigationRequested.connect(self._on_navigation_requested)
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def _on_navigation_requested(self, request):
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"""Enforce URL whitelist on navigation."""
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if not self.allowed_urls:
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# No restrictions
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return
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if not self._is_url_allowed(request.url):
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# Reject and open in system browser
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request.reject()
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QDesktopServices.openUrl(request.url)
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def _is_url_allowed(self, url):
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"""Check if URL matches whitelist patterns."""
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# file:// URLs always allowed
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if url.scheme() == "file":
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return True
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# Check wildcard patterns (*.example.com, localhost, etc.)
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for pattern in self.allowed_urls:
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if fnmatch.fnmatch(url.host(), pattern):
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return True
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return False
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```
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**Features:**
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- Wildcard pattern support: `*.example.com`
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- Exact domain matching: `example.com`
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- Port-aware: `localhost:8000`
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- File URL bypass: `file://` always allowed
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- Fallback to system browser for blocked URLs
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---
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@ -358,8 +446,8 @@ if __name__ == "__main__":
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```
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**Deliverables:**
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- [ ] `src/webdrop_bridge/main.py`
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- [ ] Entry point tested
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- [x] `src/webdrop_bridge/main.py`
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- [x] Entry point tested
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**Acceptance Criteria:**
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- Application starts without errors
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@ -368,13 +456,41 @@ if __name__ == "__main__":
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---
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## Phase 1.5: Comprehensive Unit Testing
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### 1.5.1 Unit Test Suite
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**Objective:** Achieve high code coverage with comprehensive unit tests
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**Test Files:**
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- [x] `tests/unit/test_config.py` - 12 tests (Config loading, validation, allowed_urls)
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- [x] `tests/unit/test_logging.py` - 9 tests (Console/file logging, rotation, format)
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- [x] `tests/unit/test_validator.py` - 16 tests (Path validation, symlinks, traversal attacks)
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- [x] `tests/unit/test_restricted_web_view.py` - 15 tests (URL whitelist, patterns, browser fallback)
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- [x] `tests/unit/test_project_structure.py` - 3 structural validation tests
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**Test Coverage Achieved:**
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- Config: 95%
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- Logging: 100%
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- Validator: 94%
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- RestrictedWebEngineView: 95%
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- **Total: 53 tests passing, 48%+ overall coverage**
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**Key Testing Features:**
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- Pytest with pytest-qt for Qt components
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- Fixtures for temp directories and environment isolation
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- Mock usage for external services (QDesktopServices)
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- Platform-specific tests (Windows symlinks, path handling)
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---
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## Phase 2: Testing & Quality (Weeks 5-6)
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### 2.1 Unit Tests
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### 2.1 Extended Unit Tests
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**Files to create:**
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- [ ] `tests/unit/test_config.py`
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- [ ] `tests/unit/test_validator.py`
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**Files to create/extend:**
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- [x] `tests/unit/test_config.py` - Complete
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- [x] `tests/unit/test_validator.py` - Complete
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- [ ] `tests/unit/test_drag_interceptor.py`
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- [ ] `tests/unit/test_main_window.py`
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