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Edit File: _except.py

# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Exceptions in L{twisted.mail}.
"""

from typing import Optional

class IMAP4Exception(Exception):
    pass

class IllegalClientResponse(IMAP4Exception):
    pass

class IllegalOperation(IMAP4Exception):
    pass

class IllegalMailboxEncoding(IMAP4Exception):
    pass

class MailboxException(IMAP4Exception):
    pass

class MailboxCollision(MailboxException):
    def __str__(self) -> str:
        return "Mailbox named %s already exists" % self.args

class NoSuchMailbox(MailboxException):
    def __str__(self) -> str:
        return "No mailbox named %s exists" % self.args

class ReadOnlyMailbox(MailboxException):
    def __str__(self) -> str:
        return "Mailbox open in read-only state"

class UnhandledResponse(IMAP4Exception):
    pass

class NegativeResponse(IMAP4Exception):
    pass

class NoSupportedAuthentication(IMAP4Exception):
    def __init__(self, serverSupports, clientSupports):
        IMAP4Exception.__init__(self, "No supported authentication schemes available")
        self.serverSupports = serverSupports
        self.clientSupports = clientSupports

def __str__(self) -> str:
        return IMAP4Exception.__str__(
            self
        ) + ": Server supports {!r}, client supports {!r}".format(
            self.serverSupports,
            self.clientSupports,
        )

class IllegalServerResponse(IMAP4Exception):
    pass

class IllegalIdentifierError(IMAP4Exception):
    pass

class IllegalQueryError(IMAP4Exception):
    pass

class MismatchedNesting(IMAP4Exception):
    pass

class MismatchedQuoting(IMAP4Exception):
    pass

class SMTPError(Exception):
    pass

class SMTPClientError(SMTPError):
    """
    Base class for SMTP client errors.
    """

def __init__(
        self,
        code: int,
        resp: bytes,
        log: Optional[bytes] = None,
        addresses: Optional[object] = None,
        isFatal: bool = False,
        retry: bool = False,
    ):
        """
        @param code: The SMTP response code associated with this error.
        @param resp: The string response associated with this error.
        @param log: A string log of the exchange leading up to and including
            the error.
        @param isFatal: A boolean indicating whether this connection can
            proceed or not. If True, the connection will be dropped.
        @param retry: A boolean indicating whether the delivery should be
            retried. If True and the factory indicates further retries are
            desirable, they will be attempted, otherwise the delivery will be
            failed.
        """
        if isinstance(resp, str):  # type: ignore[unreachable]
            resp = resp.encode("utf-8")  # type: ignore[unreachable]

if isinstance(log, str):  # type: ignore[unreachable]
            log = log.encode("utf-8")  # type: ignore[unreachable]

self.code = code
        self.resp = resp
        self.log = log
        self.addresses = addresses
        self.isFatal = isFatal
        self.retry = retry

def __str__(self) -> str:
        return self.__bytes__().decode("utf-8")

def __bytes__(self) -> bytes:
        if self.code > 0:
            res = [f"{self.code:03d} ".encode() + self.resp]
        else:
            res = [self.resp]
        if self.log:
            res.append(self.log)
            res.append(b"")
        return b"\n".join(res)

class ESMTPClientError(SMTPClientError):
    """
    Base class for ESMTP client errors.
    """

class EHLORequiredError(ESMTPClientError):
    """
    The server does not support EHLO.

This is considered a non-fatal error (the connection will not be dropped).
    """

class AUTHRequiredError(ESMTPClientError):
    """
    Authentication was required but the server does not support it.

This is considered a non-fatal error (the connection will not be dropped).
    """

class TLSRequiredError(ESMTPClientError):
    """
    Transport security was required but the server does not support it.

This is considered a non-fatal error (the connection will not be dropped).
    """

class AUTHDeclinedError(ESMTPClientError):
    """
    The server rejected our credentials.

Either the username, password, or challenge response
    given to the server was rejected.

This is considered a non-fatal error (the connection will not be
    dropped).
    """

class AuthenticationError(ESMTPClientError):
    """
    An error occurred while authenticating.

Either the server rejected our request for authentication or the
    challenge received was malformed.

This is considered a non-fatal error (the connection will not be
    dropped).
    """

class SMTPTLSError(ESMTPClientError):
    """
    An error occurred while negiotiating for transport security.

This is considered a non-fatal error (the connection will not be dropped).
    """

class SMTPConnectError(SMTPClientError):
    """
    Failed to connect to the mail exchange host.

This is considered a fatal error.  A retry will be made.
    """

def __init__(self, code, resp, log=None, addresses=None, isFatal=True, retry=True):
        SMTPClientError.__init__(self, code, resp, log, addresses, isFatal, retry)

class SMTPTimeoutError(SMTPClientError):
    """
    Failed to receive a response from the server in the expected time period.

This is considered a fatal error.  A retry will be made.
    """

def __init__(self, code, resp, log=None, addresses=None, isFatal=True, retry=True):
        SMTPClientError.__init__(self, code, resp, log, addresses, isFatal, retry)

class SMTPProtocolError(SMTPClientError):
    """
    The server sent a mangled response.

This is considered a fatal error.  A retry will not be made.
    """

def __init__(self, code, resp, log=None, addresses=None, isFatal=True, retry=False):
        SMTPClientError.__init__(self, code, resp, log, addresses, isFatal, retry)

class SMTPDeliveryError(SMTPClientError):
    """
    Indicates that a delivery attempt has had an error.
    """

class SMTPServerError(SMTPError):
    def __init__(self, code, resp):
        self.code = code
        self.resp = resp

def __str__(self) -> str:
        return "%.3d %s" % (self.code, self.resp)

class SMTPAddressError(SMTPServerError):
    def __init__(self, addr, code, resp):
        from twisted.mail.smtp import Address

SMTPServerError.__init__(self, code, resp)
        self.addr = Address(addr)

def __str__(self) -> str:
        return "%.3d <%s>... %s" % (self.code, self.addr, self.resp)

class SMTPBadRcpt(SMTPAddressError):
    def __init__(self, addr, code=550, resp="Cannot receive for specified address"):
        SMTPAddressError.__init__(self, addr, code, resp)

class SMTPBadSender(SMTPAddressError):
    def __init__(self, addr, code=550, resp="Sender not acceptable"):
        SMTPAddressError.__init__(self, addr, code, resp)

class AddressError(SMTPError):
    """
    Parse error in address
    """

class POP3Error(Exception):
    """
    The base class for POP3 errors.
    """

pass

class _POP3MessageDeleted(Exception):
    """
    An internal control-flow error which indicates that a deleted message was
    requested.
    """

class POP3ClientError(Exception):
    """
    The base class for all exceptions raised by POP3Client.
    """

class InsecureAuthenticationDisallowed(POP3ClientError):
    """
    An error indicating secure authentication was required but no mechanism
    could be found.
    """

class TLSError(POP3ClientError):
    """
    An error indicating secure authentication was required but either the
    transport does not support TLS or no TLS context factory was supplied.
    """

class TLSNotSupportedError(POP3ClientError):
    """
    An error indicating secure authentication was required but the server does
    not support TLS.
    """

class ServerErrorResponse(POP3ClientError):
    """
    An error indicating that the server returned an error response to a
    request.

@ivar consumer: See L{__init__}
    """

def __init__(self, reason, consumer=None):
        """
        @type reason: L{bytes}
        @param reason: The server response minus the status indicator.

@type consumer: callable that takes L{object}
        @param consumer: The function meant to handle the values for a
            multi-line response.
        """
        POP3ClientError.__init__(self, reason)
        self.consumer = consumer

class LineTooLong(POP3ClientError):
    """
    An error indicating that the server sent a line which exceeded the
    maximum line length (L{LineOnlyReceiver.MAX_LENGTH}).
    """