mirror of
https://github.com/LonamiWebs/Telethon.git
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117 lines
3.7 KiB
Python
117 lines
3.7 KiB
Python
"""Errors not related to the Telegram API itself"""
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import struct
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from ..tl import TLRequest
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class ReadCancelledError(Exception):
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"""Occurs when a read operation was cancelled."""
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def __init__(self):
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super().__init__('The read operation was cancelled.')
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class TypeNotFoundError(Exception):
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"""
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Occurs when a type is not found, for example,
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when trying to read a TLObject with an invalid constructor code.
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"""
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def __init__(self, invalid_constructor_id, remaining):
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super().__init__(
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'Could not find a matching Constructor ID for the TLObject '
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'that was supposed to be read with ID {:08x}. Most likely, '
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'a TLObject was trying to be read when it should not be read. '
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'Remaining bytes: {!r}'.format(invalid_constructor_id, remaining))
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self.invalid_constructor_id = invalid_constructor_id
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self.remaining = remaining
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class InvalidChecksumError(Exception):
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"""
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Occurs when using the TCP full mode and the checksum of a received
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packet doesn't match the expected checksum.
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"""
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def __init__(self, checksum, valid_checksum):
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super().__init__(
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'Invalid checksum ({} when {} was expected). '
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'This packet should be skipped.'
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.format(checksum, valid_checksum))
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self.checksum = checksum
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self.valid_checksum = valid_checksum
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class InvalidBufferError(BufferError):
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"""
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Occurs when the buffer is invalid, and may contain an HTTP error code.
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For instance, 404 means "forgotten/broken authorization key", while
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"""
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def __init__(self, payload):
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self.payload = payload
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if len(payload) == 4:
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self.code = -struct.unpack('<i', payload)[0]
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super().__init__(
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'Invalid response buffer (HTTP code {})'.format(self.code))
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else:
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self.code = None
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super().__init__(
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'Invalid response buffer (too short {})'.format(self.payload))
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class SecurityError(Exception):
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"""
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Generic security error, mostly used when generating a new AuthKey.
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"""
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def __init__(self, *args):
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if not args:
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args = ['A security check failed.']
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super().__init__(*args)
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class CdnFileTamperedError(SecurityError):
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"""
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Occurs when there's a hash mismatch between the decrypted CDN file
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and its expected hash.
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"""
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def __init__(self):
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super().__init__(
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'The CDN file has been altered and its download cancelled.'
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)
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class AlreadyInConversationError(Exception):
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"""
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Occurs when another exclusive conversation is opened in the same chat.
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"""
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def __init__(self):
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super().__init__(
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'Cannot open exclusive conversation in a '
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'chat that already has one open conversation'
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)
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class MultiError(Exception):
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"""Exception container for multiple `TLRequest`'s."""
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def __new__(cls, exceptions, result, requests):
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if len(result) != len(exceptions) != len(requests):
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raise ValueError(
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'Need result, exception and request for each error')
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for e, req in zip(exceptions, requests):
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if not isinstance(e, BaseException) and e is not None:
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raise TypeError(
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"Expected an exception object, not '%r'" % e
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)
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if not isinstance(req, TLRequest):
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raise TypeError(
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"Expected TLRequest object, not '%r'" % req
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)
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if len(exceptions) == 1:
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return exceptions[0]
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self = BaseException.__new__(cls)
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self.exceptions = list(exceptions)
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self.results = list(result)
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self.requests = list(requests)
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return self
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