487 lines
25 KiB
Python
487 lines
25 KiB
Python
# -*- coding: utf-8 -*-
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##############################################################################
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#
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# OpenERP, Open Source Management Solution
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# Copyright (C) 2011-2012 OpenERP S.A (<http://www.openerp.com>)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>
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#
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##############################################################################
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from email.MIMEText import MIMEText
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from email.MIMEBase import MIMEBase
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from email.MIMEMultipart import MIMEMultipart
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from email.Charset import Charset
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from email.Header import Header
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from email.Utils import formatdate, make_msgid, COMMASPACE
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from email import Encoders
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import logging
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import re
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import smtplib
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import threading
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from openerp.osv import osv, fields
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from openerp.tools.translate import _
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from openerp.tools import html2text
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import openerp.tools as tools
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# ustr was originally from tools.misc.
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# it is moved to loglevels until we refactor tools.
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from openerp.loglevels import ustr
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_logger = logging.getLogger(__name__)
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class MailDeliveryException(osv.except_osv):
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"""Specific exception subclass for mail delivery errors"""
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def __init__(self, name, value):
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super(MailDeliveryException, self).__init__(name, value)
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class WriteToLogger(object):
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"""debugging helper: behave as a fd and pipe to logger at the given level"""
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def __init__(self, logger, level=logging.DEBUG):
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self.logger = logger
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self.level = level
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def write(self, s):
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self.logger.log(self.level, s)
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def try_coerce_ascii(string_utf8):
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"""Attempts to decode the given utf8-encoded string
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as ASCII after coercing it to UTF-8, then return
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the confirmed 7-bit ASCII string.
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If the process fails (because the string
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contains non-ASCII characters) returns ``None``.
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"""
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try:
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string_utf8.decode('ascii')
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except UnicodeDecodeError:
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return
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return string_utf8
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def encode_header(header_text):
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"""Returns an appropriate representation of the given header value,
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suitable for direct assignment as a header value in an
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email.message.Message. RFC2822 assumes that headers contain
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only 7-bit characters, so we ensure it is the case, using
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RFC2047 encoding when needed.
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:param header_text: unicode or utf-8 encoded string with header value
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:rtype: string | email.header.Header
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:return: if ``header_text`` represents a plain ASCII string,
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return the same 7-bit string, otherwise returns an email.header.Header
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that will perform the appropriate RFC2047 encoding of
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non-ASCII values.
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"""
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if not header_text: return ""
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# convert anything to utf-8, suitable for testing ASCIIness, as 7-bit chars are
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# encoded as ASCII in utf-8
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header_text_utf8 = tools.ustr(header_text).encode('utf-8')
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header_text_ascii = try_coerce_ascii(header_text_utf8)
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# if this header contains non-ASCII characters,
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# we'll need to wrap it up in a message.header.Header
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# that will take care of RFC2047-encoding it as
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# 7-bit string.
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return header_text_ascii if header_text_ascii\
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else Header(header_text_utf8, 'utf-8')
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def encode_header_param(param_text):
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"""Returns an appropriate RFC2047 encoded representation of the given
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header parameter value, suitable for direct assignation as the
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param value (e.g. via Message.set_param() or Message.add_header())
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RFC2822 assumes that headers contain only 7-bit characters,
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so we ensure it is the case, using RFC2047 encoding when needed.
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:param param_text: unicode or utf-8 encoded string with header value
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:rtype: string
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:return: if ``param_text`` represents a plain ASCII string,
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return the same 7-bit string, otherwise returns an
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ASCII string containing the RFC2047 encoded text.
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"""
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# For details see the encode_header() method that uses the same logic
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if not param_text: return ""
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param_text_utf8 = tools.ustr(param_text).encode('utf-8')
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param_text_ascii = try_coerce_ascii(param_text_utf8)
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return param_text_ascii if param_text_ascii\
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else Charset('utf8').header_encode(param_text_utf8)
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name_with_email_pattern = re.compile(r'("[^<@>]+")\s*<([^ ,<@]+@[^> ,]+)>')
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address_pattern = re.compile(r'([^ ,<@]+@[^> ,]+)')
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def extract_rfc2822_addresses(text):
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"""Returns a list of valid RFC2822 addresses
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that can be found in ``source``, ignoring
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malformed ones and non-ASCII ones.
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"""
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if not text: return []
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candidates = address_pattern.findall(tools.ustr(text).encode('utf-8'))
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return filter(try_coerce_ascii, candidates)
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def encode_rfc2822_address_header(header_text):
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"""If ``header_text`` contains non-ASCII characters,
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attempts to locate patterns of the form
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``"Name" <address@domain>`` and replace the
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``"Name"`` portion by the RFC2047-encoded
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version, preserving the address part untouched.
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"""
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header_text_utf8 = tools.ustr(header_text).encode('utf-8')
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header_text_ascii = try_coerce_ascii(header_text_utf8)
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if header_text_ascii:
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return header_text_ascii
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# non-ASCII characters are present, attempt to
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# replace all "Name" patterns with the RFC2047-
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# encoded version
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def replace(match_obj):
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name, email = match_obj.group(1), match_obj.group(2)
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name_encoded = str(Header(name, 'utf-8'))
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return "%s <%s>" % (name_encoded, email)
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header_text_utf8 = name_with_email_pattern.sub(replace,
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header_text_utf8)
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# try again after encoding
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header_text_ascii = try_coerce_ascii(header_text_utf8)
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if header_text_ascii:
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return header_text_ascii
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# fallback to extracting pure addresses only, which could
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# still cause a failure downstream if the actual addresses
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# contain non-ASCII characters
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return COMMASPACE.join(extract_rfc2822_addresses(header_text_utf8))
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class ir_mail_server(osv.osv):
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"""Represents an SMTP server, able to send outgoing emails, with SSL and TLS capabilities."""
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_name = "ir.mail_server"
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_columns = {
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'name': fields.char('Description', size=64, required=True, select=True),
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'smtp_host': fields.char('SMTP Server', size=128, required=True, help="Hostname or IP of SMTP server"),
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'smtp_port': fields.integer('SMTP Port', size=5, required=True, help="SMTP Port. Usually 465 for SSL, and 25 or 587 for other cases."),
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'smtp_user': fields.char('Username', size=64, help="Optional username for SMTP authentication"),
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'smtp_pass': fields.char('Password', size=64, help="Optional password for SMTP authentication"),
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'smtp_encryption': fields.selection([('none','None'),
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('starttls','TLS (STARTTLS)'),
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('ssl','SSL/TLS')],
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string='Connection Security', required=True,
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help="Choose the connection encryption scheme:\n"
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"- None: SMTP sessions are done in cleartext.\n"
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"- TLS (STARTTLS): TLS encryption is requested at start of SMTP session (Recommended)\n"
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"- SSL/TLS: SMTP sessions are encrypted with SSL/TLS through a dedicated port (default: 465)"),
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'smtp_debug': fields.boolean('Debugging', help="If enabled, the full output of SMTP sessions will "
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"be written to the server log at DEBUG level"
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"(this is very verbose and may include confidential info!)"),
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'sequence': fields.integer('Priority', help="When no specific mail server is requested for a mail, the highest priority one "
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"is used. Default priority is 10 (smaller number = higher priority)"),
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'active': fields.boolean('Active')
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}
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_defaults = {
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'smtp_port': 25,
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'active': True,
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'sequence': 10,
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'smtp_encryption': 'none',
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}
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def __init__(self, *args, **kwargs):
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# Make sure we pipe the smtplib outputs to our own DEBUG logger
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if not isinstance(smtplib.stderr, WriteToLogger):
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logpiper = WriteToLogger(_logger)
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smtplib.stderr = logpiper
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smtplib.stdout = logpiper
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super(ir_mail_server, self).__init__(*args,**kwargs)
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def name_get(self, cr, uid, ids, context=None):
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return [(a["id"], "(%s)" % (a['name'])) for a in self.read(cr, uid, ids, ['name'], context=context)]
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def test_smtp_connection(self, cr, uid, ids, context=None):
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for smtp_server in self.browse(cr, uid, ids, context=context):
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smtp = False
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try:
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smtp = self.connect(smtp_server.smtp_host, smtp_server.smtp_port, user=smtp_server.smtp_user,
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password=smtp_server.smtp_pass, encryption=smtp_server.smtp_encryption,
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smtp_debug=smtp_server.smtp_debug)
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except Exception, e:
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raise osv.except_osv(_("Connection test failed!"), _("Here is what we got instead:\n %s") % tools.ustr(e))
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finally:
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try:
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if smtp: smtp.quit()
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except Exception:
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# ignored, just a consequence of the previous exception
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pass
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raise osv.except_osv(_("Connection test succeeded!"), _("Everything seems properly set up!"))
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def connect(self, host, port, user=None, password=None, encryption=False, smtp_debug=False):
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"""Returns a new SMTP connection to the give SMTP server, authenticated
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with ``user`` and ``password`` if provided, and encrypted as requested
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by the ``encryption`` parameter.
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:param host: host or IP of SMTP server to connect to
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:param int port: SMTP port to connect to
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:param user: optional username to authenticate with
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:param password: optional password to authenticate with
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:param string encryption: optional, ``'ssl'`` | ``'starttls'``
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:param bool smtp_debug: toggle debugging of SMTP sessions (all i/o
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will be output in logs)
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"""
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if encryption == 'ssl':
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if not 'SMTP_SSL' in smtplib.__all__:
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raise osv.except_osv(
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_("SMTP-over-SSL mode unavailable"),
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_("Your OpenERP Server does not support SMTP-over-SSL. You could use STARTTLS instead."
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"If SSL is needed, an upgrade to Python 2.6 on the server-side should do the trick."))
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connection = smtplib.SMTP_SSL(host, port)
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else:
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connection = smtplib.SMTP(host, port)
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connection.set_debuglevel(smtp_debug)
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if encryption == 'starttls':
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# starttls() will perform ehlo() if needed first
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# and will discard the previous list of services
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# after successfully performing STARTTLS command,
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# (as per RFC 3207) so for example any AUTH
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# capability that appears only on encrypted channels
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# will be correctly detected for next step
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connection.starttls()
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if user:
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# Attempt authentication - will raise if AUTH service not supported
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# The user/password must be converted to bytestrings in order to be usable for
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# certain hashing schemes, like HMAC.
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# See also bug #597143 and python issue #5285
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user = tools.ustr(user).encode('utf-8')
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password = tools.ustr(password).encode('utf-8')
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connection.login(user, password)
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return connection
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def build_email(self, email_from, email_to, subject, body, email_cc=None, email_bcc=None, reply_to=False,
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attachments=None, message_id=None, references=None, object_id=False, subtype='plain', headers=None,
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body_alternative=None, subtype_alternative='plain'):
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"""Constructs an RFC2822 email.message.Message object based on the keyword arguments passed, and returns it.
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:param string email_from: sender email address
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:param list email_to: list of recipient addresses (to be joined with commas)
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:param string subject: email subject (no pre-encoding/quoting necessary)
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:param string body: email body, of the type ``subtype`` (by default, plaintext).
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If html subtype is used, the message will be automatically converted
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to plaintext and wrapped in multipart/alternative, unless an explicit
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``body_alternative`` version is passed.
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:param string body_alternative: optional alternative body, of the type specified in ``subtype_alternative``
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:param string reply_to: optional value of Reply-To header
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:param string object_id: optional tracking identifier, to be included in the message-id for
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recognizing replies. Suggested format for object-id is "res_id-model",
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e.g. "12345-crm.lead".
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:param string subtype: optional mime subtype for the text body (usually 'plain' or 'html'),
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must match the format of the ``body`` parameter. Default is 'plain',
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making the content part of the mail "text/plain".
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:param string subtype_alternative: optional mime subtype of ``body_alternative`` (usually 'plain'
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or 'html'). Default is 'plain'.
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:param list attachments: list of (filename, filecontents) pairs, where filecontents is a string
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containing the bytes of the attachment
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:param list email_cc: optional list of string values for CC header (to be joined with commas)
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:param list email_bcc: optional list of string values for BCC header (to be joined with commas)
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:param dict headers: optional map of headers to set on the outgoing mail (may override the
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other headers, including Subject, Reply-To, Message-Id, etc.)
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:rtype: email.message.Message (usually MIMEMultipart)
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:return: the new RFC2822 email message
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"""
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email_from = email_from or tools.config.get('email_from')
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assert email_from, "You must either provide a sender address explicitly or configure "\
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"a global sender address in the server configuration or with the "\
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"--email-from startup parameter."
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# Note: we must force all strings to to 8-bit utf-8 when crafting message,
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# or use encode_header() for headers, which does it automatically.
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headers = headers or {} # need valid dict later
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if not email_cc: email_cc = []
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if not email_bcc: email_bcc = []
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if not body: body = u''
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email_body_utf8 = ustr(body).encode('utf-8')
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email_text_part = MIMEText(email_body_utf8, _subtype=subtype, _charset='utf-8')
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msg = MIMEMultipart()
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if not message_id:
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if object_id:
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message_id = tools.generate_tracking_message_id(object_id)
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else:
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message_id = make_msgid()
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msg['Message-Id'] = encode_header(message_id)
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if references:
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msg['references'] = encode_header(references)
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msg['Subject'] = encode_header(subject)
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msg['From'] = encode_rfc2822_address_header(email_from)
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del msg['Reply-To']
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if reply_to:
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msg['Reply-To'] = encode_rfc2822_address_header(reply_to)
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else:
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msg['Reply-To'] = msg['From']
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msg['To'] = encode_rfc2822_address_header(COMMASPACE.join(email_to))
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if email_cc:
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msg['Cc'] = encode_rfc2822_address_header(COMMASPACE.join(email_cc))
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if email_bcc:
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msg['Bcc'] = encode_rfc2822_address_header(COMMASPACE.join(email_bcc))
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msg['Date'] = formatdate()
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# Custom headers may override normal headers or provide additional ones
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for key, value in headers.iteritems():
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msg[ustr(key).encode('utf-8')] = encode_header(value)
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if subtype == 'html' and not body_alternative and html2text:
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# Always provide alternative text body ourselves if possible.
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text_utf8 = tools.html2text(email_body_utf8.decode('utf-8')).encode('utf-8')
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alternative_part = MIMEMultipart(_subtype="alternative")
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alternative_part.attach(MIMEText(text_utf8, _charset='utf-8', _subtype='plain'))
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alternative_part.attach(email_text_part)
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msg.attach(alternative_part)
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elif body_alternative:
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# Include both alternatives, as specified, within a multipart/alternative part
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alternative_part = MIMEMultipart(_subtype="alternative")
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body_alternative_utf8 = ustr(body_alternative).encode('utf-8')
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alternative_body_part = MIMEText(body_alternative_utf8, _subtype=subtype_alternative, _charset='utf-8')
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alternative_part.attach(alternative_body_part)
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alternative_part.attach(email_text_part)
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msg.attach(alternative_part)
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else:
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msg.attach(email_text_part)
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if attachments:
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for (fname, fcontent) in attachments:
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filename_rfc2047 = encode_header_param(fname)
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part = MIMEBase('application', "octet-stream")
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# The default RFC2231 encoding of Message.add_header() works in Thunderbird but not GMail
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# so we fix it by using RFC2047 encoding for the filename instead.
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part.set_param('name', filename_rfc2047)
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part.add_header('Content-Disposition', 'attachment', filename=filename_rfc2047)
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part.set_payload(fcontent)
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Encoders.encode_base64(part)
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msg.attach(part)
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return msg
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def send_email(self, cr, uid, message, mail_server_id=None, smtp_server=None, smtp_port=None,
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smtp_user=None, smtp_password=None, smtp_encryption=None, smtp_debug=False,
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context=None):
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"""Sends an email directly (no queuing).
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No retries are done, the caller should handle MailDeliveryException in order to ensure that
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the mail is never lost.
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If the mail_server_id is provided, sends using this mail server, ignoring other smtp_* arguments.
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If mail_server_id is None and smtp_server is None, use the default mail server (highest priority).
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If mail_server_id is None and smtp_server is not None, use the provided smtp_* arguments.
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If both mail_server_id and smtp_server are None, look for an 'smtp_server' value in server config,
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and fails if not found.
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:param message: the email.message.Message to send. The envelope sender will be extracted from the
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``Return-Path`` or ``From`` headers. The envelope recipients will be
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extracted from the combined list of ``To``, ``CC`` and ``BCC`` headers.
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:param mail_server_id: optional id of ir.mail_server to use for sending. overrides other smtp_* arguments.
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:param smtp_server: optional hostname of SMTP server to use
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:param smtp_encryption: optional TLS mode, one of 'none', 'starttls' or 'ssl' (see ir.mail_server fields for explanation)
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:param smtp_port: optional SMTP port, if mail_server_id is not passed
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:param smtp_user: optional SMTP user, if mail_server_id is not passed
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:param smtp_password: optional SMTP password to use, if mail_server_id is not passed
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:param smtp_debug: optional SMTP debug flag, if mail_server_id is not passed
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:return: the Message-ID of the message that was just sent, if successfully sent, otherwise raises
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MailDeliveryException and logs root cause.
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"""
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smtp_from = message['Return-Path'] or message['From']
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assert smtp_from, "The Return-Path or From header is required for any outbound email"
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# The email's "Envelope From" (Return-Path), and all recipient addresses must only contain ASCII characters.
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from_rfc2822 = extract_rfc2822_addresses(smtp_from)
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assert len(from_rfc2822) == 1, "Malformed 'Return-Path' or 'From' address - it may only contain plain ASCII characters"
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smtp_from = from_rfc2822[0]
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email_to = message['To']
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email_cc = message['Cc']
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email_bcc = message['Bcc']
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smtp_to_list = filter(None, tools.flatten(map(extract_rfc2822_addresses,[email_to, email_cc, email_bcc])))
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assert smtp_to_list, "At least one valid recipient address should be specified for outgoing emails (To/Cc/Bcc)"
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# Do not actually send emails in testing mode!
|
|
if getattr(threading.currentThread(), 'testing', False):
|
|
_logger.info("skip sending email in test mode")
|
|
return message['Message-Id']
|
|
|
|
# Get SMTP Server Details from Mail Server
|
|
mail_server = None
|
|
if mail_server_id:
|
|
mail_server = self.browse(cr, uid, mail_server_id)
|
|
elif not smtp_server:
|
|
mail_server_ids = self.search(cr, uid, [], order='sequence', limit=1)
|
|
if mail_server_ids:
|
|
mail_server = self.browse(cr, uid, mail_server_ids[0])
|
|
|
|
if mail_server:
|
|
smtp_server = mail_server.smtp_host
|
|
smtp_user = mail_server.smtp_user
|
|
smtp_password = mail_server.smtp_pass
|
|
smtp_port = mail_server.smtp_port
|
|
smtp_encryption = mail_server.smtp_encryption
|
|
smtp_debug = smtp_debug or mail_server.smtp_debug
|
|
else:
|
|
# we were passed an explicit smtp_server or nothing at all
|
|
smtp_server = smtp_server or tools.config.get('smtp_server')
|
|
smtp_port = tools.config.get('smtp_port', 25) if smtp_port is None else smtp_port
|
|
smtp_user = smtp_user or tools.config.get('smtp_user')
|
|
smtp_password = smtp_password or tools.config.get('smtp_password')
|
|
if smtp_encryption is None and tools.config.get('smtp_ssl'):
|
|
smtp_encryption = 'starttls' # STARTTLS is the new meaning of the smtp_ssl flag as of v7.0
|
|
|
|
if not smtp_server:
|
|
raise osv.except_osv(
|
|
_("Missing SMTP Server"),
|
|
_("Please define at least one SMTP server, or provide the SMTP parameters explicitly."))
|
|
|
|
try:
|
|
message_id = message['Message-Id']
|
|
|
|
# Add email in Maildir if smtp_server contains maildir.
|
|
if smtp_server.startswith('maildir:/'):
|
|
from mailbox import Maildir
|
|
maildir_path = smtp_server[8:]
|
|
mdir = Maildir(maildir_path, factory=None, create = True)
|
|
mdir.add(message.as_string(True))
|
|
return message_id
|
|
|
|
try:
|
|
smtp = self.connect(smtp_server, smtp_port, smtp_user, smtp_password, smtp_encryption or False, smtp_debug)
|
|
smtp.sendmail(smtp_from, smtp_to_list, message.as_string())
|
|
finally:
|
|
try:
|
|
# Close Connection of SMTP Server
|
|
smtp.quit()
|
|
except Exception:
|
|
# ignored, just a consequence of the previous exception
|
|
pass
|
|
except Exception, e:
|
|
msg = _("Mail delivery failed via SMTP server '%s'.\n%s: %s") % (tools.ustr(smtp_server),
|
|
e.__class__.__name__,
|
|
tools.ustr(e))
|
|
_logger.exception(msg)
|
|
raise MailDeliveryException(_("Mail delivery failed"), msg)
|
|
return message_id
|
|
|
|
def on_change_encryption(self, cr, uid, ids, smtp_encryption):
|
|
if smtp_encryption == 'ssl':
|
|
result = {'value': {'smtp_port': 465}}
|
|
if not 'SMTP_SSL' in smtplib.__all__:
|
|
result['warning'] = {'title': _('Warning'),
|
|
'message': _('Your server does not seem to support SSL, you may want to try STARTTLS instead')}
|
|
else:
|
|
result = {'value': {'smtp_port': 25}}
|
|
return result
|
|
|
|
# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
|