peeringdb-peeringdb/peeringdb_server/exceptions.py

from rest_framework.exceptions import Throttled
from rest_framework.views import exception_handler


def format_wait_time(wait_time):
    """
    Format wait time in seconds to human readable format
    """

    if wait_time < 60:
        return f"{wait_time} seconds"
    elif wait_time < 3600 and wait_time > 60:
        return f"{wait_time // 60} minutes"
    else:
        return f"{wait_time // 3600} hours"


def rest_exception_handler(exc, context):
    response = exception_handler(exc, context)
    request = context.get("request")

    if isinstance(exc, Throttled):
        message = getattr(
            request,
            "throttle_response_message",
            "Request was throttled. Expected available in {time}.",
        )
        custom_response_data = {
            "message": f"{message}".replace("{time}", format_wait_time(exc.wait)),
        }

        response.data = custom_response_data

    return response