+
−# -*- coding: UTF-8 -*-
+
−# Copyright (c) 2007 - 2010, Pascal Volk
+
−# See COPYING for distribution information.
+
−# package initialization code
+
−#
+
−
+
−import gettext
+
−import os
+
−import re
+
−import locale
+
−
+
−from encodings.idna import ToASCII, ToUnicode
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−
+
−from VirtualMailManager.constants.ERROR import \
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−     DOMAIN_INVALID, DOMAIN_TOO_LONG, LOCALPART_INVALID, LOCALPART_TOO_LONG, \
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−     NOT_EXECUTABLE, NO_SUCH_BINARY, NO_SUCH_DIRECTORY
+
−from VirtualMailManager.constants.VERSION import *
+
−from VirtualMailManager.Exceptions import VMMException
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−
+
−
+
−__all__ = [
+
−    # imported modules
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−    'os', 're', 'locale',
+
−    # version information from VERSION
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−    '__author__', '__date__', '__version__',
+
−    # error codes
+
−    'ENCODING', 'ace2idna', 'check_domainname', 'check_localpart', 'exec_ok',
+
−    'expand_path', 'get_unicode', 'idn2ascii', 'is_dir',
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−]
+
−
+
−
+
−# Try to set all of the locales according to the current
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−# environment variables and get the character encoding.
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−try:
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−    locale.setlocale(locale.LC_ALL, '')
+
−except locale.Error:
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−    locale.setlocale(locale.LC_ALL, 'C')
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−ENCODING = locale.nl_langinfo(locale.CODESET)
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−
+
−RE_ASCII_CHARS = r"^[\x20-\x7E]*$"
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−RE_DOMAIN = r"^(?:[a-z0-9-]{1,63}\.){1,}[a-z]{2,6}$"
+
−RE_LOCALPART = r"[^\w!#$%&'\*\+-\.\/=?^_`{\|}~]"
+
−
+
−
+
−# there may be many domain and e-mail address checks
+
−re_obj_domain = re.compile(RE_DOMAIN)
+
−re_obj_localpart = re.compile(RE_LOCALPART)
+
−
+
−
+
−gettext.install('vmm', '/usr/local/share/locale', unicode=1)
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−
+
−
+
−def get_unicode(string):
+
−    """Converts `string` to `unicode`, if necessary."""
+
−    if isinstance(string, unicode):
+
−        return string
+
−    return unicode(string, ENCODING, 'replace')
+
−
+
−
+
−def expand_path(path):
+
−    """Expands paths, starting with ``.`` or ``~``, to an absolute path."""
+
−    if path.startswith('.'):
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−        return os.path.abspath(path)
+
−    if path.startswith('~'):
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−        return os.path.expanduser(path)
+
−    return path
+
−
+
−
+
−def is_dir(path):
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−    """Checks if ``path`` is a directory.
+
−
+
−    Throws a `VMMException` if ``path`` is not a directory.
+
−    """
+
−    path = expand_path(path)
+
−    if not os.path.isdir(path):
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−        raise VMMException(_(u'“%s” is not a directory') %
+
−                            get_unicode(path), NO_SUCH_DIRECTORY)
+
−    return path
+
−
+
−
+
−def exec_ok(binary):
+
−    """Checks if the ``binary`` exists and if it is executable.
+
−
+
−    Throws a `VMMException` if the ``binary`` isn't a file or is not
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−    executable.
+
−    """
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−    binary = expand_path(binary)
+
−    if not os.path.isfile(binary):
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−        raise VMMException(_(u'“%s” is not a file') % get_unicode(binary),
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−                           NO_SUCH_BINARY)
+
−    if not os.access(binary, os.X_OK):
+
−        raise VMMException(_(u'File is not executable: “%s”') %
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−                           get_unicode(binary), NOT_EXECUTABLE)
+
−    return binary
+
−
+
−
+
−def idn2ascii(domainname):
+
−    """Converts the idn domain name `domainname` into punycode."""
+
−    return '.'.join([ToASCII(lbl) for lbl in domainname.split('.') if lbl])
+
−
+
−
+
−def ace2idna(domainname):
+
−    """Converts the domain name `domainname` from ACE according to IDNA."""
+
−    return u'.'.join([ToUnicode(lbl) for lbl in domainname.split('.') if lbl])
+
−
+
−
+
−def check_domainname(domainname):
+
−    """Returns the validated domain name `domainname`.
+
−
+
−    It also converts the name of the domain from IDN to ASCII, if necessary.
+
−
+
−    Throws an `VMMException`, if the domain name is too long or doesn't look
+
−    like a valid domain name (label.label.label).
+
−    """
+
−    if not re_obj_domain.match(domainname):
+
−        domainname = idn2ascii(domainname)
+
−    if len(domainname) > 255:
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−        raise VMMException(_(u'The domain name is too long'), DOMAIN_TOO_LONG)
+
−    if not re_obj_domain.match(domainname):
+
−        raise VMMException(_(u'The domain name %r is invalid') % domainname,
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−                           DOMAIN_INVALID)
+
−    return domainname
+
−
+
−
+
−def check_localpart(localpart):
+
−    """Returns the validated local-part *localpart*.
+
−
+
−    Throws a `VMMException` if the local-part is too long or contains
+
−    invalid characters.
+
−    """
+
−    if len(localpart) > 64:
+
−        raise VMMException(_(u'The local-part %r is too long') % localpart,
+
−                           LOCALPART_TOO_LONG)
+
−    invalid_chars = set(re_obj_localpart.findall(localpart))
+
−    if invalid_chars:
+
−        i_chars = u''.join((u'"%s" ' % c for c in invalid_chars))
+
−        raise VMMException(_(u"The local-part %(l_part)r contains invalid \
+
−characters: %(i_chars)s") %
+
−                           {'l_part': localpart, 'i_chars': i_chars},
+
−                           LOCALPART_INVALID)
+
−    return localpart