Function build_extension_item

src/websockets/headers.py:392–408

Build an extension definition. This is the reverse of :func:`parse_extension_item`.

(
    name: ExtensionName, parameters: Sequence[ExtensionParameter]
)

def build_extension_item(
    name: ExtensionName, parameters: Sequence[ExtensionParameter]
) -> str:
    """
    Build an extension definition.

    This is the reverse of :func:`parse_extension_item`.

    """
    return "; ".join(
        [cast(str, name)]
        + [
            # Quoted strings aren't necessary because values are always tokens.
            name if value is None else f"{name}={value}"
            for name, value in parameters
        ]
    )


def build_extension(extensions: Sequence[ExtensionHeader]) -> str: