mirror of
https://github.com/jwinterm/modoboa.git
synced 2026-10-17 05:41:25 +02:00
645 lines
23 KiB
Python
645 lines
23 KiB
Python
# coding: utf-8
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"""
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:mod:`imaputils` --- Extra IMAPv4 utilities
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-------------------------------------------
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"""
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import imaplib, ssl, email
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import re
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import time
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from functools import wraps
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from django.utils.translation import ugettext as _
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from modoboa.lib import parameters
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from modoboa.lib.connections import *
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from modoboa.lib.webutils import static_url
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from exceptions import ImapError, WebmailError
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from fetch_parser import *
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#imaplib.Debug = 4
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class capability(object):
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"""
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Simple decorator to check if the server presents the required
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capability. If not, a fallback method is called instead.
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:param name: the capability name (upper case)
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:param fallback_method: a method's name
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"""
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def __init__(self, name, fallback_method):
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self.name = name
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self.fallback_method = fallback_method
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def __call__(self, method):
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@wraps(method)
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def wrapped_func(cls, *args, **kwargs):
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if self.name in cls.capabilities:
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return method(cls, *args, **kwargs)
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return getattr(cls, self.fallback_method)(cls, **kwargs)
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return wrapped_func
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class BodyStructure(object):
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"""
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BODYSTRUCTURE response parser.
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Just a simple class that tries to distinguish content parts from
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attachments.
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"""
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def __init__(self, definition=None):
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self.is_multipart = False
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self.contents = {}
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self.attachments = []
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self.inlines = {}
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if definition is not None:
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self.load_from_definition(definition)
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def __store_part(self, definition, pnum, multisubtype):
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"""Store the given message part in the appropriate category.
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This method sort parts in two categories:
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* contents (what is going to be displayed)
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* attachments
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As there is no official definition about what is a content and
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what is an attachment, the following rules are applied:
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* If the MIME type is text/plain or text/html:
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* If no previous part of this type has already been seen, it's a content
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* Otherwise it's an attachment
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* Else, if the multipart subtype is related, we consider this
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part as content because it is certainly an embedded image
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* Any other MIME type is considered as an attachment (for now)
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:param definition: a part definition (list)
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:param prefix: the part's number
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:param multisubtype: the multipart subtype
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"""
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pnum = "1" if pnum is None else pnum
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params = dict(pnum=pnum, params=definition[2], cid=definition[3],
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description=definition[4], encoding=definition[5],
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size=definition[6])
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mtype = definition[0].lower()
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subtype = definition[1].lower()
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ftype = "%s/%s" % (definition[0].lower(), subtype)
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if ftype in ("text/plain", "text/html"):
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if not self.contents.has_key(ftype):
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self.contents[subtype] = params
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return
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elif multisubtype in ["related"]:
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self.inlines[params["cid"].strip("<>")] = params
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return
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if len(definition) > 7:
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extensions = ["md5", "disposition", "language", "location"]
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if mtype == "text":
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extensions = ["textlines"] + extensions
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elif ftype == "message/rfc822":
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extensions = ["envelopestruct", "bodystruct", "textlines"] + extensions
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for idx, value in enumerate(definition[7:]):
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params[extensions[idx]] = value
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self.attachments += [params]
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def load_from_definition(self, definition, multisubtype=None):
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if type(definition) == dict:
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struct = definition["struct"]
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pnum = definition["partnum"]
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elif type(definition[0]) == dict:
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struct = definition[0]["struct"]
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pnum = definition[0]["partnum"]
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else:
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struct = definition
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pnum = None
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if type(struct[0]) == list:
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for part in struct[0]:
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self.load_from_definition(part, struct[1])
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return
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self.__store_part(struct, pnum, multisubtype)
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def has_attachments(self):
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return len(self.attachments)
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class IMAPconnector(object):
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__metaclass__ = ConnectionsManager
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list_base_pattern = r'\((?P<flags>.*?)\) "(?P<delimiter>.*)" "(?P<name>[^"]*)"'
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list_response_pattern = re.compile(list_base_pattern)
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listextended_response_pattern = \
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re.compile(list_base_pattern + r'\s*(?P<childinfo>.*)')
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unseen_pattern = re.compile(r'[^\(]+\(UNSEEN (\d+)\)')
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def __init__(self, user=None, password=None):
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self.criterions = []
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self.address = parameters.get_admin("IMAP_SERVER")
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self.port = int(parameters.get_admin("IMAP_PORT"))
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self.login(user, password)
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def _cmd(self, name, *args, **kwargs):
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"""IMAP command wrapper
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To simplify errors handling, this wrapper calls the
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appropriate method (``uid`` or FIXME) and then check the
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return code. If an error has occured, an ``ImapError``
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exception is raised.
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For specific commands commands (FETCH, ...), the result is
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parsed using the IMAPclient module before being returned.
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:param name: the command's name
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:return: the command's result
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"""
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if name in ['FETCH', 'SORT', 'STORE', 'COPY', 'SEARCH']:
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try:
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typ, data = self.m.uid(name, *args)
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except imaplib.IMAP4.error, e:
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raise ImapError(e)
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if typ == "NO":
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raise ImapError(data)
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if name == 'FETCH':
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return parse_fetch_response(data)
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return data
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try:
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typ, data = self.m._simple_command(name, *args)
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except imaplib.IMAP4.error, e:
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raise ImapError(e)
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if typ == "NO":
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raise ImapError(data)
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if not kwargs.has_key('responses'):
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if not name in self.m.untagged_responses:
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return None
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return self.m.untagged_responses.pop(name)
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res = []
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for r in kwargs['responses']:
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if not r in self.m.untagged_responses:
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return None
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res.append(self.m.untagged_responses.pop(r))
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return res
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def __find_content_in_bodystruct(self, bodystruct, mtype, stype, prefix=""):
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"""Retrieve the number (index) of a specific part
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This part number will generally be used inside a FETCH request
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to specify a ``BODY.PEEK`` section.
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:param bodystruct: a BODYSTRUCTURE list
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:param mtype: the MIME main type (like text)
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:param stype: the MIME sub type (like plain)
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:param prefix: the prefix that will be added to the current part number
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:return: a tuple (index (None on error), encoding (string), size (int))
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"""
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if type(bodystruct[0]) in [list, tuple]:
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cpt = 1
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for part in bodystruct[0]:
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nprefix = "%s" % cpt if prefix == "" else "%s.%d" % (prefix, cpt)
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index, encoding, size = \
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self.__find_content_in_bodystruct(part, mtype, stype, nprefix)
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if index is not None:
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return (index, encoding, size)
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cpt += 1
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else:
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if bodystruct[0].lower() == mtype and bodystruct[1].lower() == stype:
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return ("1" if not len(prefix) else prefix,
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bodystruct[5], int(bodystruct[6]))
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return (None, None, 0)
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def refresh(self, user, password):
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"""Check if current connection needs a refresh
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Is it really secure?
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"""
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if self.m is not None:
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try:
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self._cmd("CHECK")
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except ImapError, e:
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if hasattr(self, "current_mailbox"):
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del self.current_mailbox
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else:
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return
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self.login(user, password)
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def login(self, user, passwd):
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"""Custom login method
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We connect to the server, issue a LOGIN command. If
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successfull, we try to record a eventuel CAPABILITY untagged
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response. Otherwise, we issue the command.
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:param user: username
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:param passwd: password
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"""
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import socket
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try:
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secured = parameters.get_admin("IMAP_SECURED")
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if secured == "yes":
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self.m = imaplib.IMAP4_SSL(self.address, self.port)
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else:
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self.m = imaplib.IMAP4(self.address, self.port)
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except (socket.error, imaplib.IMAP4.error, ssl.SSLError), error:
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raise ImapError(_("Connection to IMAP server failed: %s" % error))
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data = self._cmd("LOGIN", user, passwd)
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self.m.state = "AUTH"
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if self.m.untagged_responses.has_key("CAPABILITY"):
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self.capabilities = \
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self.m.untagged_responses.pop('CAPABILITY')[0].split()
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else:
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data = self._cmd("CAPABILITY")
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self.capabilities = data[0].split()
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def logout(self):
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try:
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self._cmd("CHECK")
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except ImapError, e:
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pass
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self._cmd("LOGOUT")
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del self.m
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self.m = None
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def messages_count(self, **kwargs):
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"""An enhanced version of messages_count
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With IMAP, to know how many messages a mailbox contains, we
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have to make a request to the server. To avoid requests
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multiplications, we sort messages in the same time. This will
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be usefull for other methods.
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:param order: sorting order
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:param folder: mailbox to scan
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"""
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if "order" in kwargs.keys() and kwargs["order"]:
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sign = kwargs["order"][:1]
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criterion = kwargs["order"][1:].upper()
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if sign == '-':
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criterion = "REVERSE %s" % criterion
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else:
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criterion = "REVERSE DATE"
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folder = kwargs.has_key("folder") and kwargs["folder"] or None
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# FIXME: pourquoi suis je obligé de faire un SELECT ici? un
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# EXAMINE plante mais je pense que c'est du à une mauvaise
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# lecture des réponses de ma part...
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self.select_mailbox(folder, readonly=False)
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data = self._cmd("SORT", "(%s)" % criterion, "UTF-8", "(NOT DELETED)",
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*self.criterions)
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self.messages = data[0].split()
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self.getquota(folder)
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return len(self.messages)
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def select_mailbox(self, name, readonly=True, force=False):
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"""Issue a SELECT/EXAMINE command to the server
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The given name is first 'imap-utf7' encoded.
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:param name: mailbox's name
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:param readonly:
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"""
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if hasattr(self, "current_mailbox"):
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if self.current_mailbox == name and not force:
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return
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self.current_mailbox = name
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name = name.encode("imap4-utf-7")
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if readonly:
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self._cmd("EXAMINE", name)
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else:
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self._cmd("SELECT", name)
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self.m.state = "SELECTED"
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def unseen_messages(self, mailbox):
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"""Return the number of unseen messages
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:param mailbox: the mailbox's name
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:return: an integer
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"""
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data = self._cmd("STATUS", mailbox.encode("imap4-utf-7"), "(UNSEEN)")
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m = self.unseen_pattern.match(data[-1])
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if m is None:
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return 0
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return int(m.group(1))
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def _encode_mbox_name(self, folder):
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if not folder:
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return "INBOX"
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return folder.encode("imap4-utf-7")
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def _parse_mailbox_name(self, descr, prefix, delimiter, parts):
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if not len(parts):
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return False
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path = "%s%s%s" % (prefix, delimiter, parts[0])
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sdescr = None
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for d in descr:
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if d["path"] == path:
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sdescr = d
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break
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if sdescr is None:
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sdescr = {"name" : parts[0], "path" : path, "sub" : []}
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descr += [sdescr]
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if self._parse_mailbox_name(sdescr["sub"], path, delimiter, parts[1:]):
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sdescr["class"] = "subfolders"
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return True
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def _listmboxes_simple(self, topmailbox='INBOX', mailboxes=[], **kwargs):
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#data = self._cmd("LIST", "", "*")
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(status, data) = self.m.list()
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result = []
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newmboxes = []
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for mb in data:
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flags, delimiter, name = self.list_response_pattern.match(mb).groups()
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name = name.strip('"').decode("imap4-utf-7")
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pos = -1
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for idx, mdm in enumerate(mailboxes):
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if mdm["name"] == name:
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pos = idx
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break
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if pos == -1:
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descr = dict(name=name)
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newmboxes += [descr]
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else:
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descr = mailboxes[idx]
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if re.search("\%s" % delimiter, name):
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parts = name.split(".")
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if not descr.has_key("path"):
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descr["path"] = parts[0]
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descr["sub"] = []
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if self._parse_mailbox_name(descr["sub"], parts[0], delimiter,
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parts[1:]):
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descr["class"] = "subfolders"
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continue
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from operator import itemgetter
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mailboxes += sorted(newmboxes, key=itemgetter("name"))
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@capability('LIST-EXTENDED', '_listmboxes_simple')
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def _listmboxes(self, topmailbox='', mailboxes=[], until_mailbox=None):
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pattern = ("%s.%%" % topmailbox.encode("imap4-utf-7")) if len(topmailbox) else "%"
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resp = self._cmd("LIST", "", pattern, "RETURN", "(CHILDREN)")
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newmboxes = []
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for mb in resp:
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flags, delimiter, name, childinfo = \
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self.listextended_response_pattern.match(mb).groups()
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flags = flags.split(' ')
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name = name.decode("imap4-utf-7")
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pos = -1
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for idx, mdm in enumerate(mailboxes):
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if mdm["name"] == name:
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pos = idx
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break
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if pos == -1:
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descr = dict(name=name)
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newmboxes += [descr]
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else:
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descr = mailboxes[idx]
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if r'\Marked' in flags or not r'\UnMarked' in flags:
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descr["send_status"] = True
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if r'\HasChildren' in flags:
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descr["path"] = name
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descr["sub"] = []
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if until_mailbox and until_mailbox.startswith(name):
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self._listmboxes(name, descr["sub"], until_mailbox)
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from operator import itemgetter
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mailboxes += sorted(newmboxes, key=itemgetter("name"))
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def getmboxes(self, user, topmailbox='', until_mailbox=None, unseen_messages=True):
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"""Returns a list of mailboxes for a particular user
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By default, only the first level of mailboxes under
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``topmailbox`` is returned. If ``until_mailbox`` is specified,
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all levels needed to access this mailbox will be returned.
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:param user: a ``User`` instance
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:param topmailbox: the mailbox where to start in the tree
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:param until_mailbox: the deepest needed mailbox
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:param unseen_messages: include unseen messages counters or not
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:return: a list
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"""
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if len(topmailbox):
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md_mailboxes = []
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else:
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md_mailboxes = [{"name" : "INBOX", "class" : "icon-home"},
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{"name" : parameters.get_user(user, "DRAFTS_FOLDER"),
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"class" : "icon-file"},
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{"name" : 'Junk'},
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{"name" : parameters.get_user(user, "SENT_FOLDER")},
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{"name" : parameters.get_user(user, "TRASH_FOLDER"),
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"class" : "icon-trash"}]
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if until_mailbox:
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name, parent = separate_mailbox(until_mailbox)
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if parent:
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until_mailbox = parent
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self._listmboxes(topmailbox, md_mailboxes, until_mailbox)
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if unseen_messages:
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for mb in md_mailboxes:
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if not mb.has_key("send_status"):
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continue
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del mb["send_status"]
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key = mb.has_key("path") and "path" or "name"
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count = self.unseen_messages(mb[key])
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if count == 0:
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continue
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mb["unseen"] = count
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return md_mailboxes
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def _add_flag(self, mbox, msgset, flag):
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"""Add flag(s) to a messages set
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:param mbox: the mailbox containing the messages
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:param msgset: messages set (uid)
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:param flag: the flag to add
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"""
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self.select_mailbox(mbox, False)
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self._cmd("STORE", msgset, "+FLAGS", flag)
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def mark_messages_unread(self, mbox, msgset):
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"""Mark a set of messages as unread
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:param mbox: the mailbox containing the messages
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:param msgset: messages set (uid)
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"""
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self.select_mailbox(mbox, False)
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self._cmd("STORE", msgset, "-FLAGS", r'(\Seen)')
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def mark_messages_read(self, mbox, msgset):
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"""Mark a set of messages as unread
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:param mbox: the mailbox containing the messages
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:param msgset: messages set (uid)
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"""
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self._add_flag(mbox, msgset, r'(\Seen)')
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def msg_forwarded(self, mailbox, mailid):
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self._add_flag(mailbox, mailid, '($Forwarded)')
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def msg_answered(self, mailbox, mailid):
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"""Add the \Answered flag to this email"""
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self._add_flag(mailbox, mailid, r'(\Answered)')
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def move(self, msgset, oldmailbox, newmailbox):
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"""Move messages between mailboxes
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"""
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self.select_mailbox(oldmailbox, False)
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self._cmd("COPY", msgset, newmailbox.encode("imap4-utf-7"))
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self._cmd("STORE", msgset, "+FLAGS", r'(\Deleted \Seen)')
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def push_mail(self, folder, msg):
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now = imaplib.Time2Internaldate(time.time())
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self.m.append(self._encode_mbox_name(folder), r'(\Seen)', now, str(msg))
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def empty(self, mbox):
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self.select_mailbox(mbox, False)
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resp = self._cmd("SEARCH", "ALL")
|
|
seq = ",".join(resp[0].split())
|
|
self._cmd("STORE", seq, "+FLAGS", r'(\Deleted)')
|
|
self._cmd("EXPUNGE")
|
|
|
|
def compact(self, mbox):
|
|
"""Compact a specific mailbox
|
|
|
|
Issue an EXPUNGE command for the specified mailbox.
|
|
|
|
:param mbox: the mailbox's name
|
|
"""
|
|
self.select_mailbox(mbox, False)
|
|
self._cmd("EXPUNGE")
|
|
|
|
def create_folder(self, name, parent=None):
|
|
if parent is not None:
|
|
name = "%s.%s" % (parent, name)
|
|
typ, data = self.m.create(self._encode_mbox_name(name))
|
|
if typ == "NO":
|
|
raise WebmailError(data[0])
|
|
return True
|
|
|
|
def rename_folder(self, oldname, newname):
|
|
typ, data = self.m.rename(self._encode_mbox_name(oldname),
|
|
self._encode_mbox_name(newname))
|
|
if typ == "NO":
|
|
raise WebmailError(data[0], ajax=True)
|
|
return True
|
|
|
|
def delete_folder(self, name):
|
|
typ, data = self.m.delete(self._encode_mbox_name(name))
|
|
if typ == "NO":
|
|
raise WebmailError(data[0])
|
|
return True
|
|
|
|
def getquota(self, mailbox):
|
|
if not "QUOTA" in self.capabilities:
|
|
self.quota_limit = self.quota_actual = None
|
|
return
|
|
|
|
data = self._cmd("GETQUOTAROOT", self._encode_mbox_name(mailbox),
|
|
responses=["QUOTAROOT", "QUOTA"])
|
|
if data is None:
|
|
self.quota_limit = self.quota_actual = None
|
|
return
|
|
|
|
quotadef = data[1][0]
|
|
m = re.match("[^\s]+ \(STORAGE (\d+) (\d+)\)", quotadef)
|
|
if not m:
|
|
print "Problem while parsing quota def"
|
|
return
|
|
self.quota_limit = int(m.group(2))
|
|
self.quota_actual = int(m.group(1))
|
|
|
|
def fetchpart(self, uid, mbox, partnum):
|
|
self.select_mailbox(mbox, False)
|
|
data = self._cmd("FETCH", uid, "(BODY[%s])" % partnum)
|
|
return data[int(uid)]["BODY[%s]" % partnum]
|
|
|
|
def fetch(self, start, stop=None, mbox=None, **kwargs):
|
|
"""Retrieve information about messages from the server
|
|
|
|
Issue a FETCH command to retrieve information about one or
|
|
more messages (such as headers) from the server.
|
|
|
|
:param start: index of the first message
|
|
:param stop: index of the last message (optionnal)
|
|
:param mbox: the mailbox that contains the messages
|
|
"""
|
|
self.select_mailbox(mbox, False)
|
|
if start and stop:
|
|
submessages = self.messages[start - 1:stop]
|
|
range = ",".join(submessages)
|
|
else:
|
|
submessages = [start]
|
|
range = start
|
|
query = '(FLAGS BODYSTRUCTURE BODY.PEEK[HEADER.FIELDS (DATE FROM TO CC SUBJECT)])'
|
|
data = self._cmd("FETCH", range, query)
|
|
result = []
|
|
for uid in submessages:
|
|
msg = email.message_from_string(data[int(uid)]['BODY[HEADER.FIELDS (DATE FROM TO CC SUBJECT)]'])
|
|
msg['imapid'] = uid
|
|
if not r'\Seen' in data[int(uid)]['FLAGS']:
|
|
msg['style'] = 'unseen'
|
|
if r'\Answered' in data[int(uid)]['FLAGS']:
|
|
msg['img_flags'] = static_url('pics/answered.png')
|
|
if r'$Forwarded' in data[int(uid)]['FLAGS']:
|
|
msg['img_flags'] = static_url('pics/forwarded.png')
|
|
bs = BodyStructure(data[int(uid)]['BODYSTRUCTURE'])
|
|
if bs.has_attachments():
|
|
msg['img_withatts'] = static_url('pics/attachment.png')
|
|
result += [msg]
|
|
return result
|
|
|
|
def fetchmail(self, mbox, mailid, readonly=True, headers=None):
|
|
"""Retrieve information about a specific message
|
|
|
|
Issue a FETCH command to retrieve a message's content from the
|
|
server. In order to not overload the server, we first retrieve
|
|
the BODYSTRUCTURE of the message. Then, according to the
|
|
result and to the user's preferences, we retrieve the
|
|
appropriate content (plain, html, etc.).
|
|
|
|
:param mbox: the mailbox containing the message
|
|
:param mailid: the message's unique id
|
|
:param readonly:
|
|
:param extraheaders:
|
|
"""
|
|
print mbox
|
|
self.select_mailbox(mbox, readonly)
|
|
if headers is None:
|
|
headers = ['DATE', 'FROM', 'TO', 'CC', 'SUBJECT']
|
|
bcmd = "BODY.PEEK" if readonly else "BODY"
|
|
data = self._cmd(
|
|
"FETCH", mailid,
|
|
"(BODYSTRUCTURE %s[HEADER.FIELDS (%s)])" % (bcmd, " ".join(headers))
|
|
)
|
|
return data[int(mailid)]
|
|
|
|
def separate_mailbox(fullname, sep="."):
|
|
"""Split a mailbox name
|
|
|
|
If a separator is found in ``fullname``, this function returns the
|
|
corresponding name and parent mailbox name.
|
|
"""
|
|
if fullname.count("."):
|
|
parts = fullname.split(sep)
|
|
name = parts[-1]
|
|
parent = sep.join(parts[0:len(parts) - 1])
|
|
return name, parent
|
|
return fullname, None
|
|
|
|
def get_imapconnector(request):
|
|
"""Simple shortcut to create a connector
|
|
|
|
:param request: a ``Request`` object
|
|
"""
|
|
imapc = IMAPconnector(user=request.user.username,
|
|
password=request.session["password"])
|
|
return imapc
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
doctest.testmod()
|
|
|