# Source code for mopidy.httpclient

    import platform

    import mopidy

    "Helpers for configuring HTTP clients used in Mopidy extensions."

    def format_proxy(proxy_config, auth=True):
        """Convert a Mopidy proxy config to the commonly used proxy string format.

        Outputs ``scheme://host:port``, ``scheme://user:pass@host:port`` or
        :class:`None` depending on the proxy config provided.

        You can also opt out of getting the basic auth by setting ``auth`` to
        :class:`False`.

        .. versionadded:: 1.1
        """
        if not proxy_config.get("hostname"):
            return None

        scheme = proxy_config.get("scheme") or "http"
        username = proxy_config.get("username")
        password = proxy_config.get("password")
        hostname = proxy_config["hostname"]
        port = proxy_config.get("port")
        if not port or port < 0:
            port = 80

        if username and password and auth:
            return f"{scheme}://{username}:{password}@{hostname}:{port}"
        else:
            return f"{scheme}://{hostname}:{port}"

    def format_user_agent(name=None):
        """Construct a User-Agent suitable for use in client code.

        This will identify use by the provided ``name`` (which should be on the
        format ``dist_name/version``), Mopidy version and Python version.

        .. versionadded:: 1.1
        """
        parts = [
            f"Mopidy/{mopidy.__version__}",
            f"{platform.python_implementation()}/{platform.python_version()}",
        ]
        if name:
            parts.insert(0, name)
        return " ".join(parts)