fix ya.make

1 files changed, 0 insertions, 1649 deletions

diff --git a/contrib/tools/python3/src/Lib/imaplib.py b/contrib/tools/python3/src/Lib/imaplib.py
deleted file mode 100644
index 73184396d89..00000000000
--- a/contrib/tools/python3/src/Lib/imaplib.py
+++ /dev/null
@@ -1,1649 +0,0 @@
-"""IMAP4 client.
-
-Based on RFC 2060.
-
-Public class:           IMAP4
-Public variable:        Debug
-Public functions:       Internaldate2tuple
-                        Int2AP
-                        ParseFlags
-                        Time2Internaldate
-"""
-
-# Author: Piers Lauder <[email protected]> December 1997.
-#
-# Authentication code contributed by Donn Cave <[email protected]> June 1998.
-# String method conversion by ESR, February 2001.
-# GET/SETACL contributed by Anthony Baxter <[email protected]> April 2001.
-# IMAP4_SSL contributed by Tino Lange <[email protected]> March 2002.
-# GET/SETQUOTA contributed by Andreas Zeidler <[email protected]> June 2002.
-# PROXYAUTH contributed by Rick Holbert <[email protected]> November 2002.
-# GET/SETANNOTATION contributed by Tomas Lindroos <[email protected]> June 2005.
-
-__version__ = "2.58"
-
-import binascii, errno, random, re, socket, subprocess, sys, time, calendar
-from datetime import datetime, timezone, timedelta
-from io import DEFAULT_BUFFER_SIZE
-
-try:
-    import ssl
-    HAVE_SSL = True
-except ImportError:
-    HAVE_SSL = False
-
-__all__ = ["IMAP4", "IMAP4_stream", "Internaldate2tuple",
-           "Int2AP", "ParseFlags", "Time2Internaldate"]
-
-#       Globals
-
-CRLF = b'\r\n'
-Debug = 0
-IMAP4_PORT = 143
-IMAP4_SSL_PORT = 993
-AllowedVersions = ('IMAP4REV1', 'IMAP4')        # Most recent first
-
-# Maximal line length when calling readline(). This is to prevent
-# reading arbitrary length lines. RFC 3501 and 2060 (IMAP 4rev1)
-# don't specify a line length. RFC 2683 suggests limiting client
-# command lines to 1000 octets and that servers should be prepared
-# to accept command lines up to 8000 octets, so we used to use 10K here.
-# In the modern world (eg: gmail) the response to, for example, a
-# search command can be quite large, so we now use 1M.
-_MAXLINE = 1000000
-
-
-#       Commands
-
-Commands = {
-        # name            valid states
-        'APPEND':       ('AUTH', 'SELECTED'),
-        'AUTHENTICATE': ('NONAUTH',),
-        'CAPABILITY':   ('NONAUTH', 'AUTH', 'SELECTED', 'LOGOUT'),
-        'CHECK':        ('SELECTED',),
-        'CLOSE':        ('SELECTED',),
-        'COPY':         ('SELECTED',),
-        'CREATE':       ('AUTH', 'SELECTED'),
-        'DELETE':       ('AUTH', 'SELECTED'),
-        'DELETEACL':    ('AUTH', 'SELECTED'),
-        'ENABLE':       ('AUTH', ),
-        'EXAMINE':      ('AUTH', 'SELECTED'),
-        'EXPUNGE':      ('SELECTED',),
-        'FETCH':        ('SELECTED',),
-        'GETACL':       ('AUTH', 'SELECTED'),
-        'GETANNOTATION':('AUTH', 'SELECTED'),
-        'GETQUOTA':     ('AUTH', 'SELECTED'),
-        'GETQUOTAROOT': ('AUTH', 'SELECTED'),
-        'MYRIGHTS':     ('AUTH', 'SELECTED'),
-        'LIST':         ('AUTH', 'SELECTED'),
-        'LOGIN':        ('NONAUTH',),
-        'LOGOUT':       ('NONAUTH', 'AUTH', 'SELECTED', 'LOGOUT'),
-        'LSUB':         ('AUTH', 'SELECTED'),
-        'MOVE':         ('SELECTED',),
-        'NAMESPACE':    ('AUTH', 'SELECTED'),
-        'NOOP':         ('NONAUTH', 'AUTH', 'SELECTED', 'LOGOUT'),
-        'PARTIAL':      ('SELECTED',),                                  # NB: obsolete
-        'PROXYAUTH':    ('AUTH',),
-        'RENAME':       ('AUTH', 'SELECTED'),
-        'SEARCH':       ('SELECTED',),
-        'SELECT':       ('AUTH', 'SELECTED'),
-        'SETACL':       ('AUTH', 'SELECTED'),
-        'SETANNOTATION':('AUTH', 'SELECTED'),
-        'SETQUOTA':     ('AUTH', 'SELECTED'),
-        'SORT':         ('SELECTED',),
-        'STARTTLS':     ('NONAUTH',),
-        'STATUS':       ('AUTH', 'SELECTED'),
-        'STORE':        ('SELECTED',),
-        'SUBSCRIBE':    ('AUTH', 'SELECTED'),
-        'THREAD':       ('SELECTED',),
-        'UID':          ('SELECTED',),
-        'UNSUBSCRIBE':  ('AUTH', 'SELECTED'),
-        'UNSELECT':     ('SELECTED',),
-        }
-
-#       Patterns to match server responses
-
-Continuation = re.compile(br'\+( (?P<data>.*))?')
-Flags = re.compile(br'.*FLAGS \((?P<flags>[^\)]*)\)')
-InternalDate = re.compile(br'.*INTERNALDATE "'
-        br'(?P<day>[ 0123][0-9])-(?P<mon>[A-Z][a-z][a-z])-(?P<year>[0-9][0-9][0-9][0-9])'
-        br' (?P<hour>[0-9][0-9]):(?P<min>[0-9][0-9]):(?P<sec>[0-9][0-9])'
-        br' (?P<zonen>[-+])(?P<zoneh>[0-9][0-9])(?P<zonem>[0-9][0-9])'
-        br'"')
-# Literal is no longer used; kept for backward compatibility.
-Literal = re.compile(br'.*{(?P<size>\d+)}$', re.ASCII)
-MapCRLF = re.compile(br'\r\n|\r|\n')
-# We no longer exclude the ']' character from the data portion of the response
-# code, even though it violates the RFC.  Popular IMAP servers such as Gmail
-# allow flags with ']', and there are programs (including imaplib!) that can
-# produce them.  The problem with this is if the 'text' portion of the response
-# includes a ']' we'll parse the response wrong (which is the point of the RFC
-# restriction).  However, that seems less likely to be a problem in practice
-# than being unable to correctly parse flags that include ']' chars, which
-# was reported as a real-world problem in issue #21815.
-Response_code = re.compile(br'\[(?P<type>[A-Z-]+)( (?P<data>.*))?\]')
-Untagged_response = re.compile(br'\* (?P<type>[A-Z-]+)( (?P<data>.*))?')
-# Untagged_status is no longer used; kept for backward compatibility
-Untagged_status = re.compile(
-    br'\* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?', re.ASCII)
-# We compile these in _mode_xxx.
-_Literal = br'.*{(?P<size>\d+)}$'
-_Untagged_status = br'\* (?P<data>\d+) (?P<type>[A-Z-]+)( (?P<data2>.*))?'
-
-
-
-class IMAP4:
-
-    r"""IMAP4 client class.
-
-    Instantiate with: IMAP4([host[, port[, timeout=None]]])
-
-            host - host's name (default: localhost);
-            port - port number (default: standard IMAP4 port).
-            timeout - socket timeout (default: None)
-                      If timeout is not given or is None,
-                      the global default socket timeout is used
-
-    All IMAP4rev1 commands are supported by methods of the same
-    name (in lower-case).
-
-    All arguments to commands are converted to strings, except for
-    AUTHENTICATE, and the last argument to APPEND which is passed as
-    an IMAP4 literal.  If necessary (the string contains any
-    non-printing characters or white-space and isn't enclosed with
-    either parentheses or double quotes) each string is quoted.
-    However, the 'password' argument to the LOGIN command is always
-    quoted.  If you want to avoid having an argument string quoted
-    (eg: the 'flags' argument to STORE) then enclose the string in
-    parentheses (eg: "(\Deleted)").
-
-    Each command returns a tuple: (type, [data, ...]) where 'type'
-    is usually 'OK' or 'NO', and 'data' is either the text from the
-    tagged response, or untagged results from command. Each 'data'
-    is either a string, or a tuple. If a tuple, then the first part
-    is the header of the response, and the second part contains
-    the data (ie: 'literal' value).
-
-    Errors raise the exception class <instance>.error("<reason>").
-    IMAP4 server errors raise <instance>.abort("<reason>"),
-    which is a sub-class of 'error'. Mailbox status changes
-    from READ-WRITE to READ-ONLY raise the exception class
-    <instance>.readonly("<reason>"), which is a sub-class of 'abort'.
-
-    "error" exceptions imply a program error.
-    "abort" exceptions imply the connection should be reset, and
-            the command re-tried.
-    "readonly" exceptions imply the command should be re-tried.
-
-    Note: to use this module, you must read the RFCs pertaining to the
-    IMAP4 protocol, as the semantics of the arguments to each IMAP4
-    command are left to the invoker, not to mention the results. Also,
-    most IMAP servers implement a sub-set of the commands available here.
-    """
-
-    class error(Exception): pass    # Logical errors - debug required
-    class abort(error): pass        # Service errors - close and retry
-    class readonly(abort): pass     # Mailbox status changed to READ-ONLY
-
-    def __init__(self, host='', port=IMAP4_PORT, timeout=None):
-        self.debug = Debug
-        self.state = 'LOGOUT'
-        self.literal = None             # A literal argument to a command
-        self.tagged_commands = {}       # Tagged commands awaiting response
-        self.untagged_responses = {}    # {typ: [data, ...], ...}
-        self.continuation_response = '' # Last continuation response
-        self.is_readonly = False        # READ-ONLY desired state
-        self.tagnum = 0
-        self._tls_established = False
-        self._mode_ascii()
-
-        # Open socket to server.
-
-        self.open(host, port, timeout)
-
-        try:
-            self._connect()
-        except Exception:
-            try:
-                self.shutdown()
-            except OSError:
-                pass
-            raise
-
-    def _mode_ascii(self):
-        self.utf8_enabled = False
-        self._encoding = 'ascii'
-        self.Literal = re.compile(_Literal, re.ASCII)
-        self.Untagged_status = re.compile(_Untagged_status, re.ASCII)
-
-
-    def _mode_utf8(self):
-        self.utf8_enabled = True
-        self._encoding = 'utf-8'
-        self.Literal = re.compile(_Literal)
-        self.Untagged_status = re.compile(_Untagged_status)
-
-
-    def _connect(self):
-        # Create unique tag for this session,
-        # and compile tagged response matcher.
-
-        self.tagpre = Int2AP(random.randint(4096, 65535))
-        self.tagre = re.compile(br'(?P<tag>'
-                        + self.tagpre
-                        + br'\d+) (?P<type>[A-Z]+) (?P<data>.*)', re.ASCII)
-
-        # Get server welcome message,
-        # request and store CAPABILITY response.
-
-        if __debug__:
-            self._cmd_log_len = 10
-            self._cmd_log_idx = 0
-            self._cmd_log = {}           # Last `_cmd_log_len' interactions
-            if self.debug >= 1:
-                self._mesg('imaplib version %s' % __version__)
-                self._mesg('new IMAP4 connection, tag=%s' % self.tagpre)
-
-        self.welcome = self._get_response()
-        if 'PREAUTH' in self.untagged_responses:
-            self.state = 'AUTH'
-        elif 'OK' in self.untagged_responses:
-            self.state = 'NONAUTH'
-        else:
-            raise self.error(self.welcome)
-
-        self._get_capabilities()
-        if __debug__:
-            if self.debug >= 3:
-                self._mesg('CAPABILITIES: %r' % (self.capabilities,))
-
-        for version in AllowedVersions:
-            if not version in self.capabilities:
-                continue
-            self.PROTOCOL_VERSION = version
-            return
-
-        raise self.error('server not IMAP4 compliant')
-
-
-    def __getattr__(self, attr):
-        #       Allow UPPERCASE variants of IMAP4 command methods.
-        if attr in Commands:
-            return getattr(self, attr.lower())
-        raise AttributeError("Unknown IMAP4 command: '%s'" % attr)
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        if self.state == "LOGOUT":
-            return
-
-        try:
-            self.logout()
-        except OSError:
-            pass
-
-
-    #       Overridable methods
-
-
-    def _create_socket(self, timeout):
-        # Default value of IMAP4.host is '', but socket.getaddrinfo()
-        # (which is used by socket.create_connection()) expects None
-        # as a default value for host.
-        if timeout is not None and not timeout:
-            raise ValueError('Non-blocking socket (timeout=0) is not supported')
-        host = None if not self.host else self.host
-        sys.audit("imaplib.open", self, self.host, self.port)
-        address = (host, self.port)
-        if timeout is not None:
-            return socket.create_connection(address, timeout)
-        return socket.create_connection(address)
-
-    def open(self, host='', port=IMAP4_PORT, timeout=None):
-        """Setup connection to remote server on "host:port"
-            (default: localhost:standard IMAP4 port).
-        This connection will be used by the routines:
-            read, readline, send, shutdown.
-        """
-        self.host = host
-        self.port = port
-        self.sock = self._create_socket(timeout)
-        self.file = self.sock.makefile('rb')
-
-
-    def read(self, size):
-        """Read 'size' bytes from remote."""
-        return self.file.read(size)
-
-
-    def readline(self):
-        """Read line from remote."""
-        line = self.file.readline(_MAXLINE + 1)
-        if len(line) > _MAXLINE:
-            raise self.error("got more than %d bytes" % _MAXLINE)
-        return line
-
-
-    def send(self, data):
-        """Send data to remote."""
-        sys.audit("imaplib.send", self, data)
-        self.sock.sendall(data)
-
-
-    def shutdown(self):
-        """Close I/O established in "open"."""
-        self.file.close()
-        try:
-            self.sock.shutdown(socket.SHUT_RDWR)
-        except OSError as exc:
-            # The server might already have closed the connection.
-            # On Windows, this may result in WSAEINVAL (error 10022):
-            # An invalid operation was attempted.
-            if (exc.errno != errno.ENOTCONN
-               and getattr(exc, 'winerror', 0) != 10022):
-                raise
-        finally:
-            self.sock.close()
-
-
-    def socket(self):
-        """Return socket instance used to connect to IMAP4 server.
-
-        socket = <instance>.socket()
-        """
-        return self.sock
-
-
-
-    #       Utility methods
-
-
-    def recent(self):
-        """Return most recent 'RECENT' responses if any exist,
-        else prompt server for an update using the 'NOOP' command.
-
-        (typ, [data]) = <instance>.recent()
-
-        'data' is None if no new messages,
-        else list of RECENT responses, most recent last.
-        """
-        name = 'RECENT'
-        typ, dat = self._untagged_response('OK', [None], name)
-        if dat[-1]:
-            return typ, dat
-        typ, dat = self.noop()  # Prod server for response
-        return self._untagged_response(typ, dat, name)
-
-
-    def response(self, code):
-        """Return data for response 'code' if received, or None.
-
-        Old value for response 'code' is cleared.
-
-        (code, [data]) = <instance>.response(code)
-        """
-        return self._untagged_response(code, [None], code.upper())
-
-
-
-    #       IMAP4 commands
-
-
-    def append(self, mailbox, flags, date_time, message):
-        """Append message to named mailbox.
-
-        (typ, [data]) = <instance>.append(mailbox, flags, date_time, message)
-
-                All args except `message' can be None.
-        """
-        name = 'APPEND'
-        if not mailbox:
-            mailbox = 'INBOX'
-        if flags:
-            if (flags[0],flags[-1]) != ('(',')'):
-                flags = '(%s)' % flags
-        else:
-            flags = None
-        if date_time:
-            date_time = Time2Internaldate(date_time)
-        else:
-            date_time = None
-        literal = MapCRLF.sub(CRLF, message)
-        if self.utf8_enabled:
-            literal = b'UTF8 (' + literal + b')'
-        self.literal = literal
-        return self._simple_command(name, mailbox, flags, date_time)
-
-
-    def authenticate(self, mechanism, authobject):
-        """Authenticate command - requires response processing.
-
-        'mechanism' specifies which authentication mechanism is to
-        be used - it must appear in <instance>.capabilities in the
-        form AUTH=<mechanism>.
-
-        'authobject' must be a callable object:
-
-                data = authobject(response)
-
-        It will be called to process server continuation responses; the
-        response argument it is passed will be a bytes.  It should return bytes
-        data that will be base64 encoded and sent to the server.  It should
-        return None if the client abort response '*' should be sent instead.
-        """
-        mech = mechanism.upper()
-        # XXX: shouldn't this code be removed, not commented out?
-        #cap = 'AUTH=%s' % mech
-        #if not cap in self.capabilities:       # Let the server decide!
-        #    raise self.error("Server doesn't allow %s authentication." % mech)
-        self.literal = _Authenticator(authobject).process
-        typ, dat = self._simple_command('AUTHENTICATE', mech)
-        if typ != 'OK':
-            raise self.error(dat[-1].decode('utf-8', 'replace'))
-        self.state = 'AUTH'
-        return typ, dat
-
-
-    def capability(self):
-        """(typ, [data]) = <instance>.capability()
-        Fetch capabilities list from server."""
-
-        name = 'CAPABILITY'
-        typ, dat = self._simple_command(name)
-        return self._untagged_response(typ, dat, name)
-
-
-    def check(self):
-        """Checkpoint mailbox on server.
-
-        (typ, [data]) = <instance>.check()
-        """
-        return self._simple_command('CHECK')
-
-
-    def close(self):
-        """Close currently selected mailbox.
-
-        Deleted messages are removed from writable mailbox.
-        This is the recommended command before 'LOGOUT'.
-
-        (typ, [data]) = <instance>.close()
-        """
-        try:
-            typ, dat = self._simple_command('CLOSE')
-        finally:
-            self.state = 'AUTH'
-        return typ, dat
-
-
-    def copy(self, message_set, new_mailbox):
-        """Copy 'message_set' messages onto end of 'new_mailbox'.
-
-        (typ, [data]) = <instance>.copy(message_set, new_mailbox)
-        """
-        return self._simple_command('COPY', message_set, new_mailbox)
-
-
-    def create(self, mailbox):
-        """Create new mailbox.
-
-        (typ, [data]) = <instance>.create(mailbox)
-        """
-        return self._simple_command('CREATE', mailbox)
-
-
-    def delete(self, mailbox):
-        """Delete old mailbox.
-
-        (typ, [data]) = <instance>.delete(mailbox)
-        """
-        return self._simple_command('DELETE', mailbox)
-
-    def deleteacl(self, mailbox, who):
-        """Delete the ACLs (remove any rights) set for who on mailbox.
-
-        (typ, [data]) = <instance>.deleteacl(mailbox, who)
-        """
-        return self._simple_command('DELETEACL', mailbox, who)
-
-    def enable(self, capability):
-        """Send an RFC5161 enable string to the server.
-
-        (typ, [data]) = <instance>.enable(capability)
-        """
-        if 'ENABLE' not in self.capabilities:
-            raise IMAP4.error("Server does not support ENABLE")
-        typ, data = self._simple_command('ENABLE', capability)
-        if typ == 'OK' and 'UTF8=ACCEPT' in capability.upper():
-            self._mode_utf8()
-        return typ, data
-
-    def expunge(self):
-        """Permanently remove deleted items from selected mailbox.
-
-        Generates 'EXPUNGE' response for each deleted message.
-
-        (typ, [data]) = <instance>.expunge()
-
-        'data' is list of 'EXPUNGE'd message numbers in order received.
-        """
-        name = 'EXPUNGE'
-        typ, dat = self._simple_command(name)
-        return self._untagged_response(typ, dat, name)
-
-
-    def fetch(self, message_set, message_parts):
-        """Fetch (parts of) messages.
-
-        (typ, [data, ...]) = <instance>.fetch(message_set, message_parts)
-
-        'message_parts' should be a string of selected parts
-        enclosed in parentheses, eg: "(UID BODY[TEXT])".
-
-        'data' are tuples of message part envelope and data.
-        """
-        name = 'FETCH'
-        typ, dat = self._simple_command(name, message_set, message_parts)
-        return self._untagged_response(typ, dat, name)
-
-
-    def getacl(self, mailbox):
-        """Get the ACLs for a mailbox.
-
-        (typ, [data]) = <instance>.getacl(mailbox)
-        """
-        typ, dat = self._simple_command('GETACL', mailbox)
-        return self._untagged_response(typ, dat, 'ACL')
-
-
-    def getannotation(self, mailbox, entry, attribute):
-        """(typ, [data]) = <instance>.getannotation(mailbox, entry, attribute)
-        Retrieve ANNOTATIONs."""
-
-        typ, dat = self._simple_command('GETANNOTATION', mailbox, entry, attribute)
-        return self._untagged_response(typ, dat, 'ANNOTATION')
-
-
-    def getquota(self, root):
-        """Get the quota root's resource usage and limits.
-
-        Part of the IMAP4 QUOTA extension defined in rfc2087.
-
-        (typ, [data]) = <instance>.getquota(root)
-        """
-        typ, dat = self._simple_command('GETQUOTA', root)
-        return self._untagged_response(typ, dat, 'QUOTA')
-
-
-    def getquotaroot(self, mailbox):
-        """Get the list of quota roots for the named mailbox.
-
-        (typ, [[QUOTAROOT responses...], [QUOTA responses]]) = <instance>.getquotaroot(mailbox)
-        """
-        typ, dat = self._simple_command('GETQUOTAROOT', mailbox)
-        typ, quota = self._untagged_response(typ, dat, 'QUOTA')
-        typ, quotaroot = self._untagged_response(typ, dat, 'QUOTAROOT')
-        return typ, [quotaroot, quota]
-
-
-    def list(self, directory='""', pattern='*'):
-        """List mailbox names in directory matching pattern.
-
-        (typ, [data]) = <instance>.list(directory='""', pattern='*')
-
-        'data' is list of LIST responses.
-        """
-        name = 'LIST'
-        typ, dat = self._simple_command(name, directory, pattern)
-        return self._untagged_response(typ, dat, name)
-
-
-    def login(self, user, password):
-        """Identify client using plaintext password.
-
-        (typ, [data]) = <instance>.login(user, password)
-
-        NB: 'password' will be quoted.
-        """
-        typ, dat = self._simple_command('LOGIN', user, self._quote(password))
-        if typ != 'OK':
-            raise self.error(dat[-1])
-        self.state = 'AUTH'
-        return typ, dat
-
-
-    def login_cram_md5(self, user, password):
-        """ Force use of CRAM-MD5 authentication.
-
-        (typ, [data]) = <instance>.login_cram_md5(user, password)
-        """
-        self.user, self.password = user, password
-        return self.authenticate('CRAM-MD5', self._CRAM_MD5_AUTH)
-
-
-    def _CRAM_MD5_AUTH(self, challenge):
-        """ Authobject to use with CRAM-MD5 authentication. """
-        import hmac
-        pwd = (self.password.encode('utf-8') if isinstance(self.password, str)
-                                             else self.password)
-        return self.user + " " + hmac.HMAC(pwd, challenge, 'md5').hexdigest()
-
-
-    def logout(self):
-        """Shutdown connection to server.
-
-        (typ, [data]) = <instance>.logout()
-
-        Returns server 'BYE' response.
-        """
-        self.state = 'LOGOUT'
-        typ, dat = self._simple_command('LOGOUT')
-        self.shutdown()
-        return typ, dat
-
-
-    def lsub(self, directory='""', pattern='*'):
-        """List 'subscribed' mailbox names in directory matching pattern.
-
-        (typ, [data, ...]) = <instance>.lsub(directory='""', pattern='*')
-
-        'data' are tuples of message part envelope and data.
-        """
-        name = 'LSUB'
-        typ, dat = self._simple_command(name, directory, pattern)
-        return self._untagged_response(typ, dat, name)
-
-    def myrights(self, mailbox):
-        """Show my ACLs for a mailbox (i.e. the rights that I have on mailbox).
-
-        (typ, [data]) = <instance>.myrights(mailbox)
-        """
-        typ,dat = self._simple_command('MYRIGHTS', mailbox)
-        return self._untagged_response(typ, dat, 'MYRIGHTS')
-
-    def namespace(self):
-        """ Returns IMAP namespaces ala rfc2342
-
-        (typ, [data, ...]) = <instance>.namespace()
-        """
-        name = 'NAMESPACE'
-        typ, dat = self._simple_command(name)
-        return self._untagged_response(typ, dat, name)
-
-
-    def noop(self):
-        """Send NOOP command.
-
-        (typ, [data]) = <instance>.noop()
-        """
-        if __debug__:
-            if self.debug >= 3:
-                self._dump_ur(self.untagged_responses)
-        return self._simple_command('NOOP')
-
-
-    def partial(self, message_num, message_part, start, length):
-        """Fetch truncated part of a message.
-
-        (typ, [data, ...]) = <instance>.partial(message_num, message_part, start, length)
-
-        'data' is tuple of message part envelope and data.
-        """
-        name = 'PARTIAL'
-        typ, dat = self._simple_command(name, message_num, message_part, start, length)
-        return self._untagged_response(typ, dat, 'FETCH')
-
-
-    def proxyauth(self, user):
-        """Assume authentication as "user".
-
-        Allows an authorised administrator to proxy into any user's
-        mailbox.
-
-        (typ, [data]) = <instance>.proxyauth(user)
-        """
-
-        name = 'PROXYAUTH'
-        return self._simple_command('PROXYAUTH', user)
-
-
-    def rename(self, oldmailbox, newmailbox):
-        """Rename old mailbox name to new.
-
-        (typ, [data]) = <instance>.rename(oldmailbox, newmailbox)
-        """
-        return self._simple_command('RENAME', oldmailbox, newmailbox)
-
-
-    def search(self, charset, *criteria):
-        """Search mailbox for matching messages.
-
-        (typ, [data]) = <instance>.search(charset, criterion, ...)
-
-        'data' is space separated list of matching message numbers.
-        If UTF8 is enabled, charset MUST be None.
-        """
-        name = 'SEARCH'
-        if charset:
-            if self.utf8_enabled:
-                raise IMAP4.error("Non-None charset not valid in UTF8 mode")
-            typ, dat = self._simple_command(name, 'CHARSET', charset, *criteria)
-        else:
-            typ, dat = self._simple_command(name, *criteria)
-        return self._untagged_response(typ, dat, name)
-
-
-    def select(self, mailbox='INBOX', readonly=False):
-        """Select a mailbox.
-
-        Flush all untagged responses.
-
-        (typ, [data]) = <instance>.select(mailbox='INBOX', readonly=False)
-
-        'data' is count of messages in mailbox ('EXISTS' response).
-
-        Mandated responses are ('FLAGS', 'EXISTS', 'RECENT', 'UIDVALIDITY'), so
-        other responses should be obtained via <instance>.response('FLAGS') etc.
-        """
-        self.untagged_responses = {}    # Flush old responses.
-        self.is_readonly = readonly
-        if readonly:
-            name = 'EXAMINE'
-        else:
-            name = 'SELECT'
-        typ, dat = self._simple_command(name, mailbox)
-        if typ != 'OK':
-            self.state = 'AUTH'     # Might have been 'SELECTED'
-            return typ, dat
-        self.state = 'SELECTED'
-        if 'READ-ONLY' in self.untagged_responses \
-                and not readonly:
-            if __debug__:
-                if self.debug >= 1:
-                    self._dump_ur(self.untagged_responses)
-            raise self.readonly('%s is not writable' % mailbox)
-        return typ, self.untagged_responses.get('EXISTS', [None])
-
-
-    def setacl(self, mailbox, who, what):
-        """Set a mailbox acl.
-
-        (typ, [data]) = <instance>.setacl(mailbox, who, what)
-        """
-        return self._simple_command('SETACL', mailbox, who, what)
-
-
-    def setannotation(self, *args):
-        """(typ, [data]) = <instance>.setannotation(mailbox[, entry, attribute]+)
-        Set ANNOTATIONs."""
-
-        typ, dat = self._simple_command('SETANNOTATION', *args)
-        return self._untagged_response(typ, dat, 'ANNOTATION')
-
-
-    def setquota(self, root, limits):
-        """Set the quota root's resource limits.
-
-        (typ, [data]) = <instance>.setquota(root, limits)
-        """
-        typ, dat = self._simple_command('SETQUOTA', root, limits)
-        return self._untagged_response(typ, dat, 'QUOTA')
-
-
-    def sort(self, sort_criteria, charset, *search_criteria):
-        """IMAP4rev1 extension SORT command.
-
-        (typ, [data]) = <instance>.sort(sort_criteria, charset, search_criteria, ...)
-        """
-        name = 'SORT'
-        #if not name in self.capabilities:      # Let the server decide!
-        #       raise self.error('unimplemented extension command: %s' % name)
-        if (sort_criteria[0],sort_criteria[-1]) != ('(',')'):
-            sort_criteria = '(%s)' % sort_criteria
-        typ, dat = self._simple_command(name, sort_criteria, charset, *search_criteria)
-        return self._untagged_response(typ, dat, name)
-
-
-    def starttls(self, ssl_context=None):
-        name = 'STARTTLS'
-        if not HAVE_SSL:
-            raise self.error('SSL support missing')
-        if self._tls_established:
-            raise self.abort('TLS session already established')
-        if name not in self.capabilities:
-            raise self.abort('TLS not supported by server')
-        # Generate a default SSL context if none was passed.
-        if ssl_context is None:
-            ssl_context = ssl._create_stdlib_context()
-        typ, dat = self._simple_command(name)
-        if typ == 'OK':
-            self.sock = ssl_context.wrap_socket(self.sock,
-                                                server_hostname=self.host)
-            self.file = self.sock.makefile('rb')
-            self._tls_established = True
-            self._get_capabilities()
-        else:
-            raise self.error("Couldn't establish TLS session")
-        return self._untagged_response(typ, dat, name)
-
-
-    def status(self, mailbox, names):
-        """Request named status conditions for mailbox.
-
-        (typ, [data]) = <instance>.status(mailbox, names)
-        """
-        name = 'STATUS'
-        #if self.PROTOCOL_VERSION == 'IMAP4':   # Let the server decide!
-        #    raise self.error('%s unimplemented in IMAP4 (obtain IMAP4rev1 server, or re-code)' % name)
-        typ, dat = self._simple_command(name, mailbox, names)
-        return self._untagged_response(typ, dat, name)
-
-
-    def store(self, message_set, command, flags):
-        """Alters flag dispositions for messages in mailbox.
-
-        (typ, [data]) = <instance>.store(message_set, command, flags)
-        """
-        if (flags[0],flags[-1]) != ('(',')'):
-            flags = '(%s)' % flags  # Avoid quoting the flags
-        typ, dat = self._simple_command('STORE', message_set, command, flags)
-        return self._untagged_response(typ, dat, 'FETCH')
-
-
-    def subscribe(self, mailbox):
-        """Subscribe to new mailbox.
-
-        (typ, [data]) = <instance>.subscribe(mailbox)
-        """
-        return self._simple_command('SUBSCRIBE', mailbox)
-
-
-    def thread(self, threading_algorithm, charset, *search_criteria):
-        """IMAPrev1 extension THREAD command.
-
-        (type, [data]) = <instance>.thread(threading_algorithm, charset, search_criteria, ...)
-        """
-        name = 'THREAD'
-        typ, dat = self._simple_command(name, threading_algorithm, charset, *search_criteria)
-        return self._untagged_response(typ, dat, name)
-
-
-    def uid(self, command, *args):
-        """Execute "command arg ..." with messages identified by UID,
-                rather than message number.
-
-        (typ, [data]) = <instance>.uid(command, arg1, arg2, ...)
-
-        Returns response appropriate to 'command'.
-        """
-        command = command.upper()
-        if not command in Commands:
-            raise self.error("Unknown IMAP4 UID command: %s" % command)
-        if self.state not in Commands[command]:
-            raise self.error("command %s illegal in state %s, "
-                             "only allowed in states %s" %
-                             (command, self.state,
-                              ', '.join(Commands[command])))
-        name = 'UID'
-        typ, dat = self._simple_command(name, command, *args)
-        if command in ('SEARCH', 'SORT', 'THREAD'):
-            name = command
-        else:
-            name = 'FETCH'
-        return self._untagged_response(typ, dat, name)
-
-
-    def unsubscribe(self, mailbox):
-        """Unsubscribe from old mailbox.
-
-        (typ, [data]) = <instance>.unsubscribe(mailbox)
-        """
-        return self._simple_command('UNSUBSCRIBE', mailbox)
-
-
-    def unselect(self):
-        """Free server's resources associated with the selected mailbox
-        and returns the server to the authenticated state.
-        This command performs the same actions as CLOSE, except
-        that no messages are permanently removed from the currently
-        selected mailbox.
-
-        (typ, [data]) = <instance>.unselect()
-        """
-        try:
-            typ, data = self._simple_command('UNSELECT')
-        finally:
-            self.state = 'AUTH'
-        return typ, data
-
-
-    def xatom(self, name, *args):
-        """Allow simple extension commands
-                notified by server in CAPABILITY response.
-
-        Assumes command is legal in current state.
-
-        (typ, [data]) = <instance>.xatom(name, arg, ...)
-
-        Returns response appropriate to extension command `name'.
-        """
-        name = name.upper()
-        #if not name in self.capabilities:      # Let the server decide!
-        #    raise self.error('unknown extension command: %s' % name)
-        if not name in Commands:
-            Commands[name] = (self.state,)
-        return self._simple_command(name, *args)
-
-
-
-    #       Private methods
-
-
-    def _append_untagged(self, typ, dat):
-        if dat is None:
-            dat = b''
-        ur = self.untagged_responses
-        if __debug__:
-            if self.debug >= 5:
-                self._mesg('untagged_responses[%s] %s += ["%r"]' %
-                        (typ, len(ur.get(typ,'')), dat))
-        if typ in ur:
-            ur[typ].append(dat)
-        else:
-            ur[typ] = [dat]
-
-
-    def _check_bye(self):
-        bye = self.untagged_responses.get('BYE')
-        if bye:
-            raise self.abort(bye[-1].decode(self._encoding, 'replace'))
-
-
-    def _command(self, name, *args):
-
-        if self.state not in Commands[name]:
-            self.literal = None
-            raise self.error("command %s illegal in state %s, "
-                             "only allowed in states %s" %
-                             (name, self.state,
-                              ', '.join(Commands[name])))
-
-        for typ in ('OK', 'NO', 'BAD'):
-            if typ in self.untagged_responses:
-                del self.untagged_responses[typ]
-
-        if 'READ-ONLY' in self.untagged_responses \
-        and not self.is_readonly:
-            raise self.readonly('mailbox status changed to READ-ONLY')
-
-        tag = self._new_tag()
-        name = bytes(name, self._encoding)
-        data = tag + b' ' + name
-        for arg in args:
-            if arg is None: continue
-            if isinstance(arg, str):
-                arg = bytes(arg, self._encoding)
-            data = data + b' ' + arg
-
-        literal = self.literal
-        if literal is not None:
-            self.literal = None
-            if type(literal) is type(self._command):
-                literator = literal
-            else:
-                literator = None
-                data = data + bytes(' {%s}' % len(literal), self._encoding)
-
-        if __debug__:
-            if self.debug >= 4:
-                self._mesg('> %r' % data)
-            else:
-                self._log('> %r' % data)
-
-        try:
-            self.send(data + CRLF)
-        except OSError as val:
-            raise self.abort('socket error: %s' % val)
-
-        if literal is None:
-            return tag
-
-        while 1:
-            # Wait for continuation response
-
-            while self._get_response():
-                if self.tagged_commands[tag]:   # BAD/NO?
-                    return tag
-
-            # Send literal
-
-            if literator:
-                literal = literator(self.continuation_response)
-
-            if __debug__:
-                if self.debug >= 4:
-                    self._mesg('write literal size %s' % len(literal))
-
-            try:
-                self.send(literal)
-                self.send(CRLF)
-            except OSError as val:
-                raise self.abort('socket error: %s' % val)
-
-            if not literator:
-                break
-
-        return tag
-
-
-    def _command_complete(self, name, tag):
-        logout = (name == 'LOGOUT')
-        # BYE is expected after LOGOUT
-        if not logout:
-            self._check_bye()
-        try:
-            typ, data = self._get_tagged_response(tag, expect_bye=logout)
-        except self.abort as val:
-            raise self.abort('command: %s => %s' % (name, val))
-        except self.error as val:
-            raise self.error('command: %s => %s' % (name, val))
-        if not logout:
-            self._check_bye()
-        if typ == 'BAD':
-            raise self.error('%s command error: %s %s' % (name, typ, data))
-        return typ, data
-
-
-    def _get_capabilities(self):
-        typ, dat = self.capability()
-        if dat == [None]:
-            raise self.error('no CAPABILITY response from server')
-        dat = str(dat[-1], self._encoding)
-        dat = dat.upper()
-        self.capabilities = tuple(dat.split())
-
-
-    def _get_response(self):
-
-        # Read response and store.
-        #
-        # Returns None for continuation responses,
-        # otherwise first response line received.
-
-        resp = self._get_line()
-
-        # Command completion response?
-
-        if self._match(self.tagre, resp):
-            tag = self.mo.group('tag')
-            if not tag in self.tagged_commands:
-                raise self.abort('unexpected tagged response: %r' % resp)
-
-            typ = self.mo.group('type')
-            typ = str(typ, self._encoding)
-            dat = self.mo.group('data')
-            self.tagged_commands[tag] = (typ, [dat])
-        else:
-            dat2 = None
-
-            # '*' (untagged) responses?
-
-            if not self._match(Untagged_response, resp):
-                if self._match(self.Untagged_status, resp):
-                    dat2 = self.mo.group('data2')
-
-            if self.mo is None:
-                # Only other possibility is '+' (continuation) response...
-
-                if self._match(Continuation, resp):
-                    self.continuation_response = self.mo.group('data')
-                    return None     # NB: indicates continuation
-
-                raise self.abort("unexpected response: %r" % resp)
-
-            typ = self.mo.group('type')
-            typ = str(typ, self._encoding)
-            dat = self.mo.group('data')
-            if dat is None: dat = b''        # Null untagged response
-            if dat2: dat = dat + b' ' + dat2
-
-            # Is there a literal to come?
-
-            while self._match(self.Literal, dat):
-
-                # Read literal direct from connection.
-
-                size = int(self.mo.group('size'))
-                if __debug__:
-                    if self.debug >= 4:
-                        self._mesg('read literal size %s' % size)
-                data = self.read(size)
-
-                # Store response with literal as tuple
-
-                self._append_untagged(typ, (dat, data))
-
-                # Read trailer - possibly containing another literal
-
-                dat = self._get_line()
-
-            self._append_untagged(typ, dat)
-
-        # Bracketed response information?
-
-        if typ in ('OK', 'NO', 'BAD') and self._match(Response_code, dat):
-            typ = self.mo.group('type')
-            typ = str(typ, self._encoding)
-            self._append_untagged(typ, self.mo.group('data'))
-
-        if __debug__:
-            if self.debug >= 1 and typ in ('NO', 'BAD', 'BYE'):
-                self._mesg('%s response: %r' % (typ, dat))
-
-        return resp
-
-
-    def _get_tagged_response(self, tag, expect_bye=False):
-
-        while 1:
-            result = self.tagged_commands[tag]
-            if result is not None:
-                del self.tagged_commands[tag]
-                return result
-
-            if expect_bye:
-                typ = 'BYE'
-                bye = self.untagged_responses.pop(typ, None)
-                if bye is not None:
-                    # Server replies to the "LOGOUT" command with "BYE"
-                    return (typ, bye)
-
-            # If we've seen a BYE at this point, the socket will be
-            # closed, so report the BYE now.
-            self._check_bye()
-
-            # Some have reported "unexpected response" exceptions.
-            # Note that ignoring them here causes loops.
-            # Instead, send me details of the unexpected response and
-            # I'll update the code in `_get_response()'.
-
-            try:
-                self._get_response()
-            except self.abort as val:
-                if __debug__:
-                    if self.debug >= 1:
-                        self.print_log()
-                raise
-
-
-    def _get_line(self):
-
-        line = self.readline()
-        if not line:
-            raise self.abort('socket error: EOF')
-
-        # Protocol mandates all lines terminated by CRLF
-        if not line.endswith(b'\r\n'):
-            raise self.abort('socket error: unterminated line: %r' % line)
-
-        line = line[:-2]
-        if __debug__:
-            if self.debug >= 4:
-                self._mesg('< %r' % line)
-            else:
-                self._log('< %r' % line)
-        return line
-
-
-    def _match(self, cre, s):
-
-        # Run compiled regular expression match method on 's'.
-        # Save result, return success.
-
-        self.mo = cre.match(s)
-        if __debug__:
-            if self.mo is not None and self.debug >= 5:
-                self._mesg("\tmatched %r => %r" % (cre.pattern, self.mo.groups()))
-        return self.mo is not None
-
-
-    def _new_tag(self):
-
-        tag = self.tagpre + bytes(str(self.tagnum), self._encoding)
-        self.tagnum = self.tagnum + 1
-        self.tagged_commands[tag] = None
-        return tag
-
-
-    def _quote(self, arg):
-
-        arg = arg.replace('\\', '\\\\')
-        arg = arg.replace('"', '\\"')
-
-        return '"' + arg + '"'
-
-
-    def _simple_command(self, name, *args):
-
-        return self._command_complete(name, self._command(name, *args))
-
-
-    def _untagged_response(self, typ, dat, name):
-        if typ == 'NO':
-            return typ, dat
-        if not name in self.untagged_responses:
-            return typ, [None]
-        data = self.untagged_responses.pop(name)
-        if __debug__:
-            if self.debug >= 5:
-                self._mesg('untagged_responses[%s] => %s' % (name, data))
-        return typ, data
-
-
-    if __debug__:
-
-        def _mesg(self, s, secs=None):
-            if secs is None:
-                secs = time.time()
-            tm = time.strftime('%M:%S', time.localtime(secs))
-            sys.stderr.write('  %s.%02d %s\n' % (tm, (secs*100)%100, s))
-            sys.stderr.flush()
-
-        def _dump_ur(self, untagged_resp_dict):
-            if not untagged_resp_dict:
-                return
-            items = (f'{key}: {value!r}'
-                    for key, value in untagged_resp_dict.items())
-            self._mesg('untagged responses dump:' + '\n\t\t'.join(items))
-
-        def _log(self, line):
-            # Keep log of last `_cmd_log_len' interactions for debugging.
-            self._cmd_log[self._cmd_log_idx] = (line, time.time())
-            self._cmd_log_idx += 1
-            if self._cmd_log_idx >= self._cmd_log_len:
-                self._cmd_log_idx = 0
-
-        def print_log(self):
-            self._mesg('last %d IMAP4 interactions:' % len(self._cmd_log))
-            i, n = self._cmd_log_idx, self._cmd_log_len
-            while n:
-                try:
-                    self._mesg(*self._cmd_log[i])
-                except:
-                    pass
-                i += 1
-                if i >= self._cmd_log_len:
-                    i = 0
-                n -= 1
-
-
-if HAVE_SSL:
-
-    class IMAP4_SSL(IMAP4):
-
-        """IMAP4 client class over SSL connection
-
-        Instantiate with: IMAP4_SSL([host[, port[, keyfile[, certfile[, ssl_context[, timeout=None]]]]]])
-
-                host - host's name (default: localhost);
-                port - port number (default: standard IMAP4 SSL port);
-                keyfile - PEM formatted file that contains your private key (default: None);
-                certfile - PEM formatted certificate chain file (default: None);
-                ssl_context - a SSLContext object that contains your certificate chain
-                              and private key (default: None)
-                Note: if ssl_context is provided, then parameters keyfile or
-                certfile should not be set otherwise ValueError is raised.
-                timeout - socket timeout (default: None) If timeout is not given or is None,
-                          the global default socket timeout is used
-
-        for more documentation see the docstring of the parent class IMAP4.
-        """
-
-
-        def __init__(self, host='', port=IMAP4_SSL_PORT, keyfile=None,
-                     certfile=None, ssl_context=None, timeout=None):
-            if ssl_context is not None and keyfile is not None:
-                raise ValueError("ssl_context and keyfile arguments are mutually "
-                                 "exclusive")
-            if ssl_context is not None and certfile is not None:
-                raise ValueError("ssl_context and certfile arguments are mutually "
-                                 "exclusive")
-            if keyfile is not None or certfile is not None:
-                import warnings
-                warnings.warn("keyfile and certfile are deprecated, use a "
-                              "custom ssl_context instead", DeprecationWarning, 2)
-            self.keyfile = keyfile
-            self.certfile = certfile
-            if ssl_context is None:
-                ssl_context = ssl._create_stdlib_context(certfile=certfile,
-                                                         keyfile=keyfile)
-            self.ssl_context = ssl_context
-            IMAP4.__init__(self, host, port, timeout)
-
-        def _create_socket(self, timeout):
-            sock = IMAP4._create_socket(self, timeout)
-            return self.ssl_context.wrap_socket(sock,
-                                                server_hostname=self.host)
-
-        def open(self, host='', port=IMAP4_SSL_PORT, timeout=None):
-            """Setup connection to remote server on "host:port".
-                (default: localhost:standard IMAP4 SSL port).
-            This connection will be used by the routines:
-                read, readline, send, shutdown.
-            """
-            IMAP4.open(self, host, port, timeout)
-
-    __all__.append("IMAP4_SSL")
-
-
-class IMAP4_stream(IMAP4):
-
-    """IMAP4 client class over a stream
-
-    Instantiate with: IMAP4_stream(command)
-
-            "command" - a string that can be passed to subprocess.Popen()
-
-    for more documentation see the docstring of the parent class IMAP4.
-    """
-
-
-    def __init__(self, command):
-        self.command = command
-        IMAP4.__init__(self)
-
-
-    def open(self, host=None, port=None, timeout=None):
-        """Setup a stream connection.
-        This connection will be used by the routines:
-            read, readline, send, shutdown.
-        """
-        self.host = None        # For compatibility with parent class
-        self.port = None
-        self.sock = None
-        self.file = None
-        self.process = subprocess.Popen(self.command,
-            bufsize=DEFAULT_BUFFER_SIZE,
-            stdin=subprocess.PIPE, stdout=subprocess.PIPE,
-            shell=True, close_fds=True)
-        self.writefile = self.process.stdin
-        self.readfile = self.process.stdout
-
-    def read(self, size):
-        """Read 'size' bytes from remote."""
-        return self.readfile.read(size)
-
-
-    def readline(self):
-        """Read line from remote."""
-        return self.readfile.readline()
-
-
-    def send(self, data):
-        """Send data to remote."""
-        self.writefile.write(data)
-        self.writefile.flush()
-
-
-    def shutdown(self):
-        """Close I/O established in "open"."""
-        self.readfile.close()
-        self.writefile.close()
-        self.process.wait()
-
-
-
-class _Authenticator:
-
-    """Private class to provide en/decoding
-            for base64-based authentication conversation.
-    """
-
-    def __init__(self, mechinst):
-        self.mech = mechinst    # Callable object to provide/process data
-
-    def process(self, data):
-        ret = self.mech(self.decode(data))
-        if ret is None:
-            return b'*'     # Abort conversation
-        return self.encode(ret)
-
-    def encode(self, inp):
-        #
-        #  Invoke binascii.b2a_base64 iteratively with
-        #  short even length buffers, strip the trailing
-        #  line feed from the result and append.  "Even"
-        #  means a number that factors to both 6 and 8,
-        #  so when it gets to the end of the 8-bit input
-        #  there's no partial 6-bit output.
-        #
-        oup = b''
-        if isinstance(inp, str):
-            inp = inp.encode('utf-8')
-        while inp:
-            if len(inp) > 48:
-                t = inp[:48]
-                inp = inp[48:]
-            else:
-                t = inp
-                inp = b''
-            e = binascii.b2a_base64(t)
-            if e:
-                oup = oup + e[:-1]
-        return oup
-
-    def decode(self, inp):
-        if not inp:
-            return b''
-        return binascii.a2b_base64(inp)
-
-Months = ' Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec'.split(' ')
-Mon2num = {s.encode():n+1 for n, s in enumerate(Months[1:])}
-
-def Internaldate2tuple(resp):
-    """Parse an IMAP4 INTERNALDATE string.
-
-    Return corresponding local time.  The return value is a
-    time.struct_time tuple or None if the string has wrong format.
-    """
-
-    mo = InternalDate.match(resp)
-    if not mo:
-        return None
-
-    mon = Mon2num[mo.group('mon')]
-    zonen = mo.group('zonen')
-
-    day = int(mo.group('day'))
-    year = int(mo.group('year'))
-    hour = int(mo.group('hour'))
-    min = int(mo.group('min'))
-    sec = int(mo.group('sec'))
-    zoneh = int(mo.group('zoneh'))
-    zonem = int(mo.group('zonem'))
-
-    # INTERNALDATE timezone must be subtracted to get UT
-
-    zone = (zoneh*60 + zonem)*60
-    if zonen == b'-':
-        zone = -zone
-
-    tt = (year, mon, day, hour, min, sec, -1, -1, -1)
-    utc = calendar.timegm(tt) - zone
-
-    return time.localtime(utc)
-
-
-
-def Int2AP(num):
-
-    """Convert integer to A-P string representation."""
-
-    val = b''; AP = b'ABCDEFGHIJKLMNOP'
-    num = int(abs(num))
-    while num:
-        num, mod = divmod(num, 16)
-        val = AP[mod:mod+1] + val
-    return val
-
-
-
-def ParseFlags(resp):
-
-    """Convert IMAP4 flags response to python tuple."""
-
-    mo = Flags.match(resp)
-    if not mo:
-        return ()
-
-    return tuple(mo.group('flags').split())
-
-
-def Time2Internaldate(date_time):
-
-    """Convert date_time to IMAP4 INTERNALDATE representation.
-
-    Return string in form: '"DD-Mmm-YYYY HH:MM:SS +HHMM"'.  The
-    date_time argument can be a number (int or float) representing
-    seconds since epoch (as returned by time.time()), a 9-tuple
-    representing local time, an instance of time.struct_time (as
-    returned by time.localtime()), an aware datetime instance or a
-    double-quoted string.  In the last case, it is assumed to already
-    be in the correct format.
-    """
-    if isinstance(date_time, (int, float)):
-        dt = datetime.fromtimestamp(date_time,
-                                    timezone.utc).astimezone()
-    elif isinstance(date_time, tuple):
-        try:
-            gmtoff = date_time.tm_gmtoff
-        except AttributeError:
-            if time.daylight:
-                dst = date_time[8]
-                if dst == -1:
-                    dst = time.localtime(time.mktime(date_time))[8]
-                gmtoff = -(time.timezone, time.altzone)[dst]
-            else:
-                gmtoff = -time.timezone
-        delta = timedelta(seconds=gmtoff)
-        dt = datetime(*date_time[:6], tzinfo=timezone(delta))
-    elif isinstance(date_time, datetime):
-        if date_time.tzinfo is None:
-            raise ValueError("date_time must be aware")
-        dt = date_time
-    elif isinstance(date_time, str) and (date_time[0],date_time[-1]) == ('"','"'):
-        return date_time        # Assume in correct format
-    else:
-        raise ValueError("date_time not of a known type")
-    fmt = '"%d-{}-%Y %H:%M:%S %z"'.format(Months[dt.month])
-    return dt.strftime(fmt)
-
-
-
-if __name__ == '__main__':
-
-    # To test: invoke either as 'python imaplib.py [IMAP4_server_hostname]'
-    # or 'python imaplib.py -s "rsh IMAP4_server_hostname exec /etc/rimapd"'
-    # to test the IMAP4_stream class
-
-    import getopt, getpass
-
-    try:
-        optlist, args = getopt.getopt(sys.argv[1:], 'd:s:')
-    except getopt.error as val:
-        optlist, args = (), ()
-
-    stream_command = None
-    for opt,val in optlist:
-        if opt == '-d':
-            Debug = int(val)
-        elif opt == '-s':
-            stream_command = val
-            if not args: args = (stream_command,)
-
-    if not args: args = ('',)
-
-    host = args[0]
-
-    USER = getpass.getuser()
-    PASSWD = getpass.getpass("IMAP password for %s on %s: " % (USER, host or "localhost"))
-
-    test_mesg = 'From: %(user)s@localhost%(lf)sSubject: IMAP4 test%(lf)s%(lf)sdata...%(lf)s' % {'user':USER, 'lf':'\n'}
-    test_seq1 = (
-    ('login', (USER, PASSWD)),
-    ('create', ('/tmp/xxx 1',)),
-    ('rename', ('/tmp/xxx 1', '/tmp/yyy')),
-    ('CREATE', ('/tmp/yyz 2',)),
-    ('append', ('/tmp/yyz 2', None, None, test_mesg)),
-    ('list', ('/tmp', 'yy*')),
-    ('select', ('/tmp/yyz 2',)),
-    ('search', (None, 'SUBJECT', 'test')),
-    ('fetch', ('1', '(FLAGS INTERNALDATE RFC822)')),
-    ('store', ('1', 'FLAGS', r'(\Deleted)')),
-    ('namespace', ()),
-    ('expunge', ()),
-    ('recent', ()),
-    ('close', ()),
-    )
-
-    test_seq2 = (
-    ('select', ()),
-    ('response',('UIDVALIDITY',)),
-    ('uid', ('SEARCH', 'ALL')),
-    ('response', ('EXISTS',)),
-    ('append', (None, None, None, test_mesg)),
-    ('recent', ()),
-    ('logout', ()),
-    )
-
-    def run(cmd, args):
-        M._mesg('%s %s' % (cmd, args))
-        typ, dat = getattr(M, cmd)(*args)
-        M._mesg('%s => %s %s' % (cmd, typ, dat))
-        if typ == 'NO': raise dat[0]
-        return dat
-
-    try:
-        if stream_command:
-            M = IMAP4_stream(stream_command)
-        else:
-            M = IMAP4(host)
-        if M.state == 'AUTH':
-            test_seq1 = test_seq1[1:]   # Login not needed
-        M._mesg('PROTOCOL_VERSION = %s' % M.PROTOCOL_VERSION)
-        M._mesg('CAPABILITIES = %r' % (M.capabilities,))
-
-        for cmd,args in test_seq1:
-            run(cmd, args)
-
-        for ml in run('list', ('/tmp/', 'yy%')):
-            mo = re.match(r'.*"([^"]+)"$', ml)
-            if mo: path = mo.group(1)
-            else: path = ml.split()[-1]
-            run('delete', (path,))
-
-        for cmd,args in test_seq2:
-            dat = run(cmd, args)
-
-            if (cmd,args) != ('uid', ('SEARCH', 'ALL')):
-                continue
-
-            uid = dat[-1].split()
-            if not uid: continue
-            run('uid', ('FETCH', '%s' % uid[-1],
-                    '(FLAGS INTERNALDATE RFC822.SIZE RFC822.HEADER RFC822.TEXT)'))
-
-        print('\nAll tests OK.')
-
-    except:
-        print('\nTests failed.')
-
-        if not Debug:
-            print('''
-If you would like to see debugging output,
-try: %s -d5
-''' % sys.argv[0])
-
-        raise