Task dispatching to an URL.

    :param url: The URL location of the HTTP callback task.
    :param method: Method to use when dispatching the callback. Usually
        `GET` or `POST`.
    :param params: Keyword arguments to pass on to the HTTP callback.
    :param json: JSON as body to pass on to the POST HTTP callback.
    :param headers: HTTP headers applied to callback.

def dispatch_webhook_request(url=None, method='GET', params=None,
                             json=None, data=None, headers=None, timeout=5):
    """Task dispatching to an URL.

    :param url: The URL location of the HTTP callback task.
    :param method: Method to use when dispatching the callback. Usually
        `GET` or `POST`.
    :param params: Keyword arguments to pass on to the HTTP callback.
    :param json: JSON as body to pass on to the POST HTTP callback.
    :param headers: HTTP headers applied to callback.
    """
    if method == 'GET':
        resp = urlopen(url, method, params=params, headers=headers)
    elif method in ('POST', 'DELETE', 'PUT'):
        resp = urlopen(url, method, json=json, data=data, headers=headers)
    else:
        raise NotImplementedError

    return extract_response(resp)