Function load_dirty_app

gunicorn/dirty/app.py:215–278

Load a dirty app class from an import path. Args: import_path: String in format 'module.path:ClassName' Returns: An instance of the dirty app class Raises: DirtyAppNotFoundError: If the module or class cannot be found DirtyAppError: If the class is

(import_path)

def load_dirty_app(import_path):
    """
    Load a dirty app class from an import path.

    Args:
        import_path: String in format 'module.path:ClassName'

    Returns:
        An instance of the dirty app class

    Raises:
        DirtyAppNotFoundError: If the module or class cannot be found
        DirtyAppError: If the class is not a valid DirtyApp subclass
    """
    if ':' not in import_path:
        raise DirtyAppError(
            f"Invalid import path format: {import_path}. "
            f"Expected 'module.path:ClassName'",
            app_path=import_path
        )

    module_path, class_name = import_path.rsplit(':', 1)

    try:
        # Import the module
        if module_path in sys.modules:
            module = sys.modules[module_path]
        else:
            module = importlib.import_module(module_path)
    except ImportError as e:
        raise DirtyAppNotFoundError(import_path) from e

    # Get the class from the module
    try:
        app_class = getattr(module, class_name)
    except AttributeError:
        raise DirtyAppNotFoundError(import_path) from None

    # Validate it's a class
    if not isinstance(app_class, type):
        raise DirtyAppError(
            f"{import_path} is not a class",
            app_path=import_path
        )

    # Create an instance
    try:
        app = app_class()
    except Exception as e:
        raise DirtyAppError(
            f"Failed to instantiate {import_path}: {e}",
            app_path=import_path
        ) from e

    # Validate it has the required methods
    required_methods = ['init', '__call__', 'close']
    for method_name in required_methods:
        if not hasattr(app, method_name) or not callable(getattr(app, method_name)):