exceptions.py

"""
Collection of exception classes for the Relation Engine server.
"""


class InvalidParameters(Exception):
    """Invalid request parameters."""

    def __init__(self, msg):
        self.msg = msg

    def __str__(self):
        return self.msg


class MissingHeader(Exception):
    """Missing required header in a request."""

    def __init__(self, header_name):
        self.header_name = header_name

    def __str__(self):
        return "Missing header: " + self.header_name


class UnauthorizedAccess(Exception):
    """Authentication failed for an authorization header."""

    def __init__(self, auth_url, response):
        self.auth_url = auth_url
        self.response = response


class NotFound(Exception):
    """A resource was not found (yields a 404 response)."""

    def __init__(self, details):
        self.details = details

    def __str__(self):
        return self.details