VirtualMailManager/mailbox.py
author martin f. krafft <madduck@madduck.net>
Fri, 13 Apr 2012 23:24:12 +0200
branchv0.6.x
changeset 527 e09139525580
parent 422 33a45e4c80c4
child 568 14abdd04ddf5
permissions -rw-r--r--
Modify userinfo output to indicate when domain defaults are displayed When Account instances reference NULL tid/qid/ssid, the data must come from the associated domain, and this should be indicated. For transport and services, this is easy to do as the string passed in the info dict can simply be modified. For quotalimit, however, another method must be used due to the CLI-side formatting. All approaches use a common formatter outsourced to the common.py file.
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# -*- coding: UTF-8 -*-
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# Copyright (c) 2010 - 2011, Pascal Volk
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# See COPYING for distribution information.
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"""
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    VirtualMailManager.mailbox
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    ~~~~~~~~~~~~~~~~~~~~~~~~~~
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    VirtualMailManager's mailbox classes for the Maildir, single dbox
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    (sdbox) and multi dbox (mdbox) mailbox formats.
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"""
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import os
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import re
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from binascii import a2b_base64, b2a_base64
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from subprocess import Popen, PIPE
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from VirtualMailManager.account import Account
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from VirtualMailManager.common import lisdir
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from VirtualMailManager.errors import VMMError
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from VirtualMailManager.constants import VMM_ERROR
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__all__ = ('new', 'Maildir', 'SingleDbox', 'MultiDbox',
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           'utf8_to_mutf7', 'mutf7_to_utf8')
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_ = lambda msg: msg
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cfg_dget = lambda option: None
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def _mbase64_encode(inp, dest):
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    if inp:
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        mb64 = b2a_base64(''.join(inp).encode('utf-16be'))
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        dest.append('&%s-' % mb64.rstrip('\n=').replace('/', ','))
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        del inp[:]
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def _mbase64_to_unicode(mb64):
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    return unicode(a2b_base64(mb64.replace(',', '/') + '==='), 'utf-16be')
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def utf8_to_mutf7(src):
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    """
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    Converts the international mailbox name `src` into a modified
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    version version of the UTF-7 encoding.
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    """
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    ret = []
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    tmp = []
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    for c in src:
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        ordc = ord(c)
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        if 0x20 <= ordc <= 0x25 or 0x27 <= ordc <= 0x7E:
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            _mbase64_encode(tmp, ret)
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            ret.append(c)
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        elif ordc == 0x26:
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            _mbase64_encode(tmp, ret)
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            ret.append('&-')
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        else:
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            tmp.append(c)
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    _mbase64_encode(tmp, ret)
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    return ''.join(ret)
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def mutf7_to_utf8(src):
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    """
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    Converts the mailbox name `src` from modified UTF-7 encoding to UTF-8.
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    """
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    ret = []
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    tmp = []
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    for c in src:
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        if c == '&' and not tmp:
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            tmp.append(c)
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        elif c == '-' and tmp:
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            if len(tmp) is 1:
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                ret.append('&')
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            else:
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                ret.append(_mbase64_to_unicode(''.join(tmp[1:])))
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            tmp = []
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        elif tmp:
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            tmp.append(c)
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        else:
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            ret.append(c)
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    if tmp:
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        ret.append(_mbase64_to_unicode(''.join(tmp[1:])))
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    return ''.join(ret)
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class Mailbox(object):
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    """Base class of all mailbox classes."""
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    __slots__ = ('_boxes', '_root', '_sep', '_user')
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    FILE_MODE = 0600
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    _ctrl_chr_re = re.compile('[\x00-\x1F\x7F-\x9F]')
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    _box_name_re = re.compile('^[\x20-\x25\x27-\x7E]+$')
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    def __init__(self, account):
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        """
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        Creates a new mailbox instance.
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        Use one of the `Maildir`, `SingleDbox` or `MultiDbox` classes.
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        """
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        assert isinstance(account, Account) and lisdir(account.home)
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        self._user = account
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        self._boxes = []
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        self._root = self._user.mail_location.directory
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        self._sep = '/'
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        os.chdir(self._user.home)
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    def _add_boxes(self, mailboxes, subscribe):
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        """Create all mailboxes from the `mailboxes` list.
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        If `subscribe` is *True*, the mailboxes will be listed in the
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        subscriptions file."""
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        raise NotImplementedError
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    def _validate_box_name(self, name, good, bad):
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        """
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        Validates the mailboxes name `name`.  When the name is valid, it
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        will be added to the `good` set.  Invalid mailbox names will be
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        appended to the `bad` list.
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        """
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        name = name.strip()
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        if not name:
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            return
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        if self.__class__._ctrl_chr_re.search(name):  # no control chars
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            bad.append(name)
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            return
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        if name[0] in (self._sep, '~'):
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            bad.append(name)
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            return
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        if self._sep == '/':
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            if '//' in name or '/./' in name or '/../' in name or \
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               name.startswith('../'):
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                bad.append(name)
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                return
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        elif '/' in name or '..' in name:
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            bad.append(name)
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            return
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   134
        if not self.__class__._box_name_re.match(name):
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   135
            tmp = utf8_to_mutf7(name)
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   136
            if name == mutf7_to_utf8(tmp):
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   137
                if self._user.mail_location.mbformat == 'maildir':
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diff changeset
   138
                    good.add(tmp)
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   139
                else:
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   140
                    good.add(name)
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   141
                return
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   142
            else:
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   143
                bad.append(name)
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   144
                return
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   145
        good.add(name)
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   146
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    def add_boxes(self, mailboxes, subscribe):
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   148
        """
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        Create all mailboxes from the `mailboxes` list in the user's
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   150
        mail directory.  When `subscribe` is ``True`` all created mailboxes
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   151
        will be listed in the subscriptions file.
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        Returns a list of invalid mailbox names, if any.
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   153
        """
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   154
        assert isinstance(mailboxes, list) and isinstance(subscribe, bool)
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   155
        good = set()
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   156
        bad = []
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   157
        for box in mailboxes:
415
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diff changeset
   158
            if self._sep == '/':
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diff changeset
   159
                box = box.replace('.', self._sep)
309
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   160
            self._validate_box_name(box, good, bad)
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   161
        self._add_boxes(good, subscribe)
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   162
        return bad
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   163
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   164
    def create(self):
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   165
        """Create the INBOX in the user's mail directory."""
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   166
        raise NotImplementedError
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   167
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   168
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   169
class Maildir(Mailbox):
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   170
    """Class for Maildir++ mailboxes."""
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   171
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   172
    __slots__ = ('_subdirs')
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   173
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   174
    def __init__(self, account):
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   175
        """
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   176
        Create a new Maildir++ instance.
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   177
        Call the instance's create() method, in order to create the INBOX.
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   178
        For additional mailboxes use the add_boxes() method.
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diff changeset
   179
        """
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   180
        super(self.__class__, self).__init__(account)
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   181
        self._sep = '.'
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   182
        self._subdirs = ('cur', 'new', 'tmp')
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diff changeset
   183
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diff changeset
   184
    def _create_maildirfolder_file(self, path):
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   185
        """Mark the Maildir++ folder as Maildir folder."""
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diff changeset
   186
        maildirfolder_file = os.path.join(self._sep + path, 'maildirfolder')
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diff changeset
   187
        os.close(os.open(maildirfolder_file, os.O_CREAT | os.O_WRONLY,
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   188
                         self.__class__.FILE_MODE))
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diff changeset
   189
        os.chown(maildirfolder_file, self._user.uid, self._user.gid)
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diff changeset
   190
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   191
    def _make_maildir(self, path):
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   192
        """
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diff changeset
   193
        Create Maildir++ folders with the cur, new and tmp subdirectories.
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diff changeset
   194
        """
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diff changeset
   195
        mode = cfg_dget('account.directory_mode')
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   196
        uid = self._user.uid
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   197
        gid = self._user.gid
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   198
        os.mkdir(path, mode)
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diff changeset
   199
        os.chown(path, uid, gid)
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diff changeset
   200
        for subdir in self._subdirs:
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diff changeset
   201
            dir_ = os.path.join(path, subdir)
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   202
            os.mkdir(dir_, mode)
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diff changeset
   203
            os.chown(dir_, uid, gid)
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diff changeset
   204
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   205
    def _subscribe_boxes(self):
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   206
        """Writes all created mailboxes to the subscriptions file."""
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diff changeset
   207
        if not self._boxes:
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diff changeset
   208
            return
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diff changeset
   209
        subscriptions = open('subscriptions', 'w')
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diff changeset
   210
        subscriptions.write('\n'.join(self._boxes))
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parents:
diff changeset
   211
        subscriptions.write('\n')
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diff changeset
   212
        subscriptions.flush()
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parents:
diff changeset
   213
        subscriptions.close()
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diff changeset
   214
        os.chown('subscriptions', self._user.uid, self._user.gid)
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parents:
diff changeset
   215
        os.chmod('subscriptions', self.__class__.FILE_MODE)
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parents:
diff changeset
   216
        del self._boxes[:]
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diff changeset
   217
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diff changeset
   218
    def _add_boxes(self, mailboxes, subscribe):
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diff changeset
   219
        for mailbox in mailboxes:
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diff changeset
   220
            self._make_maildir(self._sep + mailbox)
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parents:
diff changeset
   221
            self._create_maildirfolder_file(mailbox)
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diff changeset
   222
            self._boxes.append(mailbox)
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parents:
diff changeset
   223
        if subscribe:
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   224
            self._subscribe_boxes()
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parents:
diff changeset
   225
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   226
    def create(self):
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parents:
diff changeset
   227
        """Creates a Maildir++ INBOX."""
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parents:
diff changeset
   228
        self._make_maildir(self._root)
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parents:
diff changeset
   229
        os.chdir(self._root)
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parents:
diff changeset
   230
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   231
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parents:
diff changeset
   232
class SingleDbox(Mailbox):
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parents:
diff changeset
   233
    """
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parents:
diff changeset
   234
    Class for (single) dbox mailboxes.
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parents:
diff changeset
   235
    See http://wiki.dovecot.org/MailboxFormat/dbox for details.
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parents:
diff changeset
   236
    """
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parents:
diff changeset
   237
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   238
    __slots__ = ()
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diff changeset
   239
d21423478803 VMM/mailbox: Added to the repository.
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diff changeset
   240
    def __init__(self, account):
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diff changeset
   241
        """
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parents:
diff changeset
   242
        Create a new dbox instance.
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parents:
diff changeset
   243
        Call the instance's create() method, in order to create the INBOX.
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parents:
diff changeset
   244
        For additional mailboxes use the add_boxes() method.
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   245
        """
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   246
        assert cfg_dget('misc.dovecot_version') >= \
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   247
                account.mail_location.dovecot_version
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parents:
diff changeset
   248
        super(SingleDbox, self).__init__(account)
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parents:
diff changeset
   249
d21423478803 VMM/mailbox: Added to the repository.
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diff changeset
   250
    def _doveadm_create(self, mailboxes, subscribe):
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   251
        """Wrap around Dovecot's doveadm"""
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diff changeset
   252
        cmd_args = [cfg_dget('bin.dovecotpw'), 'mailbox', 'create', '-u',
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   253
                    str(self._user.address)]
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parents:
diff changeset
   254
        if subscribe:
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diff changeset
   255
            cmd_args.append('-s')
d21423478803 VMM/mailbox: Added to the repository.
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diff changeset
   256
        cmd_args.extend(mailboxes)
422
33a45e4c80c4 VMM: Deleted a few unused variables.
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diff changeset
   257
        process = Popen(cmd_args, stderr=PIPE)
33a45e4c80c4 VMM: Deleted a few unused variables.
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parents: 415
diff changeset
   258
        stderr = process.communicate()[1]
309
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parents:
diff changeset
   259
        if process.returncode:
377
920cb090eb09 VMM/mailbox: Be more detailed if doveadm couldn't create mailboxes.
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diff changeset
   260
            e_msg = _(u'Failed to create mailboxes: %r\n') % mailboxes
920cb090eb09 VMM/mailbox: Be more detailed if doveadm couldn't create mailboxes.
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diff changeset
   261
            raise VMMError(e_msg + stderr.strip(), VMM_ERROR)
309
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parents:
diff changeset
   262
d21423478803 VMM/mailbox: Added to the repository.
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diff changeset
   263
    def create(self):
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diff changeset
   264
        """Create a dbox INBOX"""
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parents:
diff changeset
   265
        os.mkdir(self._root, cfg_dget('account.directory_mode'))
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
   266
        os.chown(self._root, self._user.uid, self._user.gid)
d21423478803 VMM/mailbox: Added to the repository.
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parents:
diff changeset
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        self._doveadm_create(('INBOX',), False)
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        os.chdir(self._root)
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    def _add_boxes(self, mailboxes, subscribe):
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        self._doveadm_create(mailboxes, subscribe)
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class MultiDbox(SingleDbox):
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    """
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    Class for multi dbox mailboxes.
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    See http://wiki.dovecot.org/MailboxFormat/dbox#Multi-dbox for details.
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    """
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    __slots__ = ()
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def new(account):
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    """Create a new Mailbox instance for the given Account."""
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    mbfmt = account.mail_location.mbformat
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    if mbfmt == 'maildir':
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        return Maildir(account)
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    elif mbfmt == 'mdbox':
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        return MultiDbox(account)
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    elif mbfmt == 'sdbox':
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        return SingleDbox(account)
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    raise ValueError('unsupported mailbox format: %r' % mbfmt)
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del _, cfg_dget