def router_data_headers() -> dict[str, str]:
    """Router data headers.

    Returns:
        client headers
    """
    return {
        "host": "localhost:8000",
        "connection": "Upgrade",
        "pragma": "no-cache",
        "cache-control": "no-cache",
        "user-agent": "Mock Agent",
        "upgrade": "websocket",
        "origin": "http://localhost:3000",
        "sec-websocket-version": "13",
        "accept-encoding": "gzip, deflate, br",
        "accept-language": "en-US,en;q=0.9",
        "cookie": "csrftoken=mocktoken; "
        "name=reflex;"
        " list_cookies=%5B%22some%22%2C%20%22random%22%2C%20%22cookies%22%5D;"
        " dict_cookies=%7B%22name%22%3A%20%22reflex%22%7D; val=true",
        "sec-websocket-key": "mock-websocket-key",
        "sec-websocket-extensions": "permessage-deflate; client_max_window_bits",
    }
Router data headers.

    Returns:
        client headers
    
tests/units/conftest.py