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96 lines
2.3 KiB
Python
96 lines
2.3 KiB
Python
__all__ = [
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'AbortHandshake', 'InvalidHandshake', 'InvalidMessage', 'InvalidOrigin',
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'InvalidState', 'InvalidStatusCode', 'InvalidURI', 'ConnectionClosed',
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'PayloadTooBig', 'WebSocketProtocolError',
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]
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class InvalidHandshake(Exception):
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"""
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Exception raised when a handshake request or response is invalid.
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"""
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class AbortHandshake(InvalidHandshake):
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"""
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Exception raised to abort a handshake and return a HTTP response.
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"""
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def __init__(self, status, headers, body=None):
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self.status = status
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self.headers = headers
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self.body = body
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class InvalidMessage(InvalidHandshake):
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"""
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Exception raised when the HTTP message in a handshake request is malformed.
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"""
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class InvalidOrigin(InvalidHandshake):
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"""
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Exception raised when the origin in a handshake request is forbidden.
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"""
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class InvalidStatusCode(InvalidHandshake):
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"""
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Exception raised when a handshake response status code is invalid.
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Provides the integer status code in its ``status_code`` attribute.
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"""
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def __init__(self, status_code):
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self.status_code = status_code
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message = 'Status code not 101: {}'.format(status_code)
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super().__init__(message)
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class InvalidState(Exception):
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"""
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Exception raised when an operation is forbidden in the current state.
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"""
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class ConnectionClosed(InvalidState):
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"""
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Exception raised when trying to read or write on a closed connection.
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Provides the connection close code and reason in its ``code`` and
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``reason`` attributes respectively.
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"""
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def __init__(self, code, reason):
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self.code = code
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self.reason = reason
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message = 'WebSocket connection is closed: '
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message += 'code = {}, '.format(code) if code else 'no code, '
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message += 'reason = {}.'.format(reason) if reason else 'no reason.'
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super().__init__(message)
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class InvalidURI(Exception):
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"""
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Exception raised when an URI isn't a valid websocket URI.
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"""
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class PayloadTooBig(Exception):
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"""
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Exception raised when a frame's payload exceeds the maximum size.
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"""
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class WebSocketProtocolError(Exception):
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"""
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Internal exception raised when the remote side breaks the protocol.
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"""
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