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annotate libervia/backend/plugins/plugin_comp_email_gateway/__init__.py @ 4322:00837fa13e5a default tip @
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author | Goffi <goffi@goffi.org> |
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date | Sat, 26 Oct 2024 22:42:17 +0200 |
parents | 055930cc81f9 |
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rev | line source |
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4303 | 1 #!/usr/bin/env python3 |
2 | |
3 # Libervia Email Gateway Component | |
4 # Copyright (C) 2009-2024 Jérôme Poisson (goffi@goffi.org) | |
5 | |
6 # This program is free software: you can redistribute it and/or modify | |
7 # it under the terms of the GNU Affero General Public License as published by | |
8 # the Free Software Foundation, either version 3 of the License, or | |
9 # (at your option) any later version. | |
10 | |
11 # This program is distributed in the hope that it will be useful, | |
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 # GNU Affero General Public License for more details. | |
15 | |
16 # You should have received a copy of the GNU Affero General Public License | |
17 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | |
19 from email.header import decode_header | |
20 from email.message import EmailMessage | |
21 from email.mime.text import MIMEText | |
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22 from email.utils import formataddr, getaddresses, parseaddr |
4303 | 23 from functools import partial |
24 import re | |
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25 from typing import cast |
4303 | 26 |
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27 from pydantic import BaseModel |
4303 | 28 from twisted.internet import defer, reactor |
29 from twisted.mail import smtp | |
30 from twisted.words.protocols.jabber import jid | |
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31 from twisted.words.protocols.jabber import error as jabber_error |
4303 | 32 from twisted.words.protocols.jabber.error import StanzaError |
33 from twisted.words.protocols.jabber.xmlstream import XMPPHandler | |
34 from twisted.words.xish import domish | |
35 from wokkel import data_form, disco, iwokkel | |
36 from zope.interface import implementer | |
37 | |
38 from libervia.backend.core import exceptions | |
39 from libervia.backend.core.constants import Const as C | |
40 from libervia.backend.core.core_types import SatXMPPEntity | |
41 from libervia.backend.core.i18n import D_, _ | |
42 from libervia.backend.core.log import getLogger | |
43 from libervia.backend.memory.persistent import LazyPersistentBinaryDict | |
44 from libervia.backend.memory.sqla import select | |
45 from libervia.backend.memory.sqla_mapping import PrivateIndBin | |
46 from libervia.backend.models.core import MessageData | |
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47 from libervia.backend.plugins.plugin_xep_0033 import ( |
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48 RECIPIENT_FIELDS, |
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49 AddressType, |
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50 AddressesData, |
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51 ) |
4303 | 52 from libervia.backend.plugins.plugin_xep_0077 import XEP_0077 |
53 from libervia.backend.plugins.plugin_xep_0106 import XEP_0106 | |
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54 from libervia.backend.plugins.plugin_xep_0131 import XEP_0131, HeadersData, Urgency |
4303 | 55 from libervia.backend.tools.utils import aio |
56 | |
57 from .models import Credentials, UserData | |
58 from .imap import IMAPClientFactory | |
59 | |
60 | |
61 log = getLogger(__name__) | |
62 | |
63 IMPORT_NAME = "email-gateway" | |
64 NAME = "Libervia Email Gateway" | |
65 | |
66 PLUGIN_INFO = { | |
67 C.PI_NAME: "Email Gateway Component", | |
68 C.PI_IMPORT_NAME: IMPORT_NAME, | |
69 C.PI_MODES: [C.PLUG_MODE_COMPONENT], | |
70 C.PI_TYPE: C.PLUG_TYPE_ENTRY_POINT, | |
71 C.PI_PROTOCOLS: [], | |
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72 C.PI_DEPENDENCIES: ["XEP-0033", "XEP-0077", "XEP-0106"], |
4303 | 73 C.PI_RECOMMENDATIONS: [], |
74 C.PI_MAIN: "EmailGatewayComponent", | |
75 C.PI_HANDLER: C.BOOL_TRUE, | |
76 C.PI_DESCRIPTION: D_( | |
77 "Gateway to handle email. Usual emails are handled as message, while mailing " | |
78 "lists are converted to pubsub blogs." | |
79 ), | |
80 } | |
81 | |
82 CONF_SECTION = f"component {IMPORT_NAME}" | |
83 PREFIX_KEY_CREDENTIALS = "CREDENTIALS_" | |
84 KEY_CREDENTIALS = f"{PREFIX_KEY_CREDENTIALS}{{from_jid}}" | |
85 | |
86 email_pattern = re.compile(r"[^@]+@[^@]+\.[^@]+") | |
87 | |
88 | |
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89 class SendMailExtra(BaseModel): |
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90 addresses: AddressesData | None = None |
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91 headers: HeadersData | None = None |
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92 |
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93 |
4303 | 94 class EmailGatewayComponent: |
95 IMPORT_NAME = IMPORT_NAME | |
96 verbose = 0 | |
97 | |
98 def __init__(self, host): | |
99 self.host = host | |
100 self.client: SatXMPPEntity | None = None | |
101 self.initalized = False | |
102 self.storage: LazyPersistentBinaryDict | None = None | |
103 self._iq_register = cast(XEP_0077, host.plugins["XEP-0077"]) | |
104 self._iq_register.register_handler( | |
105 self._on_registration_form, self._on_registration_submit | |
106 ) | |
107 self._e = cast(XEP_0106, host.plugins["XEP-0106"]) | |
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108 self._shim = cast(XEP_0131, host.plugins["XEP-0131"]) |
4303 | 109 # TODO: For the moment, all credentials are kept in cache; we should only keep the |
110 # X latest. | |
111 self.users_data: dict[jid.JID, UserData] = {} | |
112 host.trigger.add_with_check( | |
113 "message_received", self, self._message_received_trigger, priority=-1000 | |
114 ) | |
115 | |
116 async def _init(self) -> None: | |
117 """Initialisation done after profile is connected""" | |
118 assert self.client is not None | |
119 self.client.identities.append(disco.DiscoIdentity("gateway", "smtp", NAME)) | |
120 self.storage = LazyPersistentBinaryDict(IMPORT_NAME, self.client.profile) | |
121 await self.connect_registered_users() | |
122 | |
123 @aio | |
124 async def get_registered_users(self) -> dict[jid.JID, Credentials]: | |
125 """Retrieve credentials for all registered users | |
126 | |
127 @return: a mapping from user JID to credentials data. | |
128 """ | |
129 assert self.client is not None | |
130 profile_id = self.host.memory.storage.profiles[self.client.profile] | |
131 async with self.host.memory.storage.session() as session: | |
132 query = select(PrivateIndBin).where( | |
133 PrivateIndBin.profile_id == profile_id, | |
134 PrivateIndBin.namespace == IMPORT_NAME, | |
135 PrivateIndBin.key.startswith(PREFIX_KEY_CREDENTIALS), | |
136 ) | |
137 result = await session.execute(query) | |
138 return { | |
139 jid.JID(p.key[len(PREFIX_KEY_CREDENTIALS) :]): p.value | |
140 for p in result.scalars() | |
141 } | |
142 | |
143 async def connect_registered_users(self) -> None: | |
144 """Connected users already registered to the gateway.""" | |
145 registered_data = await self.get_registered_users() | |
146 for user_jid, credentials in registered_data.items(): | |
147 user_data = self.users_data[user_jid] = UserData(credentials=credentials) | |
148 if not credentials["imap_success"]: | |
149 log.warning( | |
150 f"Ignoring unsuccessful IMAP credentials of {user_jid}. This user " | |
151 "won't receive message from this gateway." | |
152 ) | |
153 else: | |
154 try: | |
155 await self.connect_imap(user_jid, user_data) | |
156 except Exception as e: | |
157 log.warning(f"Can't connect {user_jid} to IMAP: {e}.") | |
158 else: | |
159 log.debug(f"Connection to IMAP server successful for {user_jid}.") | |
160 | |
161 def get_handler(self, __) -> XMPPHandler: | |
162 return EmailGatewayHandler() | |
163 | |
164 async def profile_connecting(self, client: SatXMPPEntity) -> None: | |
165 self.client = client | |
166 if not self.initalized: | |
167 await self._init() | |
168 self.initalized = True | |
169 | |
170 def _message_received_trigger( | |
171 self, | |
172 client: SatXMPPEntity, | |
173 message_elt: domish.Element, | |
174 post_treat: defer.Deferred, | |
175 ) -> bool: | |
176 """add the gateway workflow on post treatment""" | |
177 if client != self.client: | |
178 return True | |
179 post_treat.addCallback( | |
180 lambda mess_data: defer.ensureDeferred( | |
181 self.on_message(client, mess_data, message_elt) | |
182 ) | |
183 ) | |
184 return True | |
185 | |
186 async def on_message( | |
187 self, client: SatXMPPEntity, mess_data: MessageData, message_elt: domish.Element | |
188 ) -> dict: | |
189 """Called once message has been parsed | |
190 | |
191 @param client: Client session. | |
192 @param mess_data: Message data. | |
193 @return: Message data. | |
194 """ | |
195 if client != self.client: | |
196 return mess_data | |
197 from_jid = mess_data["from"].userhostJID() | |
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198 extra_kw = {} |
4303 | 199 if mess_data["type"] not in ("chat", "normal"): |
200 log.warning(f"ignoring message with unexpected type: {mess_data}") | |
201 return mess_data | |
202 if not client.is_local(from_jid): | |
203 log.warning(f"ignoring non local message: {mess_data}") | |
204 return mess_data | |
205 if not mess_data["to"].user: | |
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206 addresses = mess_data["extra"].get("addresses") |
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207 if not addresses: |
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208 log.warning(f"ignoring message addressed to gateway itself: {mess_data}") |
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209 return mess_data |
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210 else: |
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211 to_email = None |
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212 extra_kw["addresses"] = addresses |
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213 else: |
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214 try: |
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215 to_email = self._e.unescape(mess_data["to"].user) |
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216 except ValueError: |
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217 raise exceptions.DataError( |
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218 f'Invalid "to" JID, can\'t send message: {message_elt.toXml()}.' |
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219 ) |
4303 | 220 |
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221 self._shim.move_keywords_to_headers(mess_data["extra"]) |
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222 headers = mess_data["extra"].get("headers") |
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223 if headers: |
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224 extra_kw["headers"] = headers |
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225 |
4303 | 226 try: |
227 body_lang, body = next(iter(mess_data["message"].items())) | |
228 except (KeyError, StopIteration): | |
229 log.warning(f"No body found: {mess_data}") | |
230 body_lang, body = "", "" | |
231 try: | |
232 subject_lang, subject = next(iter(mess_data["subject"].items())) | |
233 except (KeyError, StopIteration): | |
234 subject_lang, subject = "", None | |
235 | |
236 if not body and not subject: | |
237 log.warning(f"Ignoring empty message: {mess_data}") | |
238 return mess_data | |
239 | |
240 try: | |
241 await self.send_email( | |
242 from_jid=from_jid, | |
243 to_email=to_email, | |
244 body=body, | |
245 subject=subject, | |
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246 extra=SendMailExtra(**extra_kw) if extra_kw else None, |
4303 | 247 ) |
248 except exceptions.UnknownEntityError: | |
249 log.warning(f"Can't send message, user {from_jid} is not registered.") | |
250 message_error_elt = StanzaError( | |
251 "subscription-required", | |
252 text="User need to register to the gateway before sending emails.", | |
253 ).toResponse(message_elt) | |
254 await client.a_send(message_error_elt) | |
255 raise exceptions.CancelError("User not registered.") | |
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256 except StanzaError as e: |
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257 log.warning("Can't send message: {e}") |
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258 message_error_elt = e.toResponse(message_elt) |
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259 await client.a_send(message_error_elt) |
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260 raise exceptions.CancelError("Can't send message: {e}") |
4303 | 261 |
262 return mess_data | |
263 | |
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264 def jid_to_email( |
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265 self, client: SatXMPPEntity, address_jid: jid.JID, credentials: dict[str, str] |
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266 ) -> str: |
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267 """Convert a JID to an email address. |
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268 |
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269 If JID is from the gateway, email address will be extracted. Otherwise, the |
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270 gateway email will be used, with XMPP address specified in name part. |
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271 |
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272 @param address_jid: JID of the recipient. |
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273 @param credentials: Sender credentials. |
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274 @return: Email address. |
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275 """ |
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276 if address_jid and address_jid.host.endswith(str(client.jid)): |
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277 return self._e.unescape(address_jid.user) |
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278 else: |
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279 email_address = credentials["user_email"] |
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280 if address_jid: |
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281 email_address = formataddr((f"xmpp:{address_jid}", email_address)) |
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282 return email_address |
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283 |
4303 | 284 async def send_email( |
285 self, | |
286 from_jid: jid.JID, | |
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287 to_email: str | None, |
4303 | 288 body: str, |
289 subject: str | None, | |
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290 extra: SendMailExtra | None = None, |
4303 | 291 ) -> None: |
292 """Send an email using sender credentials. | |
293 | |
294 Credentials will be retrieve from cache, or database. | |
295 | |
296 @param from_jid: Bare JID of the sender. | |
297 @param to_email: Email address of the destinee. | |
298 @param body: Body of the email. | |
299 @param subject: Subject of the email. | |
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300 @param extra: Extra data. |
4303 | 301 |
302 @raise exceptions.UnknownEntityError: Credentials for "from_jid" can't be found. | |
303 """ | |
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304 assert self.client is not None |
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305 if extra is None: |
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306 extra = SendMailExtra() |
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307 if to_email is None and (extra.addresses is None or not extra.addresses.to): |
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308 raise exceptions.InternalError( |
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309 '"to_email" can\'t be None if there is no "to" address!' |
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310 ) |
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311 |
4303 | 312 # We need a bare jid. |
313 assert self.storage is not None | |
314 assert not from_jid.resource | |
315 try: | |
316 user_data = self.users_data[from_jid] | |
317 except KeyError: | |
318 key = KEY_CREDENTIALS.format(from_jid=from_jid) | |
319 credentials = await self.storage.get(key) | |
320 if credentials is None: | |
321 raise exceptions.UnknownEntityError( | |
322 f"No credentials found for {from_jid}." | |
323 ) | |
324 self.users_data[from_jid] = UserData(credentials) | |
325 else: | |
326 credentials = user_data.credentials | |
327 | |
328 msg = MIMEText(body, "plain", "UTF-8") | |
329 if subject is not None: | |
330 msg["Subject"] = subject | |
331 msg["From"] = formataddr( | |
332 (credentials["user_name"] or None, credentials["user_email"]) | |
333 ) | |
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334 if extra.addresses: |
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335 assert extra.addresses.to |
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336 main_to_address = extra.addresses.to[0] |
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337 assert main_to_address.jid |
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338 to_email = self.jid_to_email(self.client, main_to_address.jid, credentials) |
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339 for field in RECIPIENT_FIELDS: |
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340 addresses = getattr(extra.addresses, field) |
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341 if not addresses: |
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342 continue |
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343 for address in addresses: |
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344 if not address.delivered and ( |
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345 address.jid is None or address.jid.host != str(self.client.jid) |
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346 ): |
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347 log.warning( |
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348 "Received undelivered message to external JID, this is not " |
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349 "allowed! Cancelling the message sending." |
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350 ) |
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351 stanza_err = jabber_error.StanzaError( |
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352 "forbidden", |
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353 text="Multicasting (XEP-0033 addresses) can only be used " |
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354 "with JID from this gateway, not external ones. " |
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355 f" {address.jid} can't be delivered by this gateway and " |
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356 "should be delivered by server instead.", |
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357 ) |
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358 raise stanza_err |
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359 email_addresses = [ |
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360 self.jid_to_email(self.client, address.jid, credentials) |
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361 for address in addresses |
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362 if address.jid |
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363 ] |
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364 if email_addresses: |
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365 msg[field.upper()] = ", ".join(email_addresses) |
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366 else: |
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367 assert to_email is not None |
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368 msg["To"] = to_email |
4303 | 369 |
370 sender_domain = credentials["user_email"].split("@", 1)[-1] | |
371 | |
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372 if extra.headers: |
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373 if extra.headers.keywords: |
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374 msg["Keywords"] = extra.headers.keywords |
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375 if extra.headers.urgency: |
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376 urgency = extra.headers.urgency |
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377 if urgency == Urgency.medium: |
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378 importance = "normal" |
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379 else: |
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380 importance = urgency |
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381 msg["Importance"] = importance |
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382 |
4303 | 383 await smtp.sendmail( |
384 credentials["smtp_host"].encode(), | |
385 credentials["user_email"].encode(), | |
386 [to_email.encode()], | |
387 msg.as_bytes(), | |
388 senderDomainName=sender_domain, | |
389 port=int(credentials["smtp_port"]), | |
390 username=credentials["smtp_username"].encode(), | |
391 password=credentials["smtp_password"].encode(), | |
392 requireAuthentication=True, | |
393 # TODO: only STARTTLS is supported right now, implicit TLS should be supported | |
394 # too. | |
395 requireTransportSecurity=True, | |
396 ) | |
397 | |
398 async def _on_registration_form( | |
399 self, client: SatXMPPEntity, iq_elt: domish.Element | |
400 ) -> tuple[bool, data_form.Form] | None: | |
401 if client != self.client: | |
402 return | |
403 assert self.storage is not None | |
404 from_jid = jid.JID(iq_elt["from"]) | |
405 key = KEY_CREDENTIALS.format(from_jid=from_jid.userhost()) | |
406 credentials = await self.storage.get(key) or {} | |
407 | |
408 form = data_form.Form(formType="form", title="IMAP/SMTP Credentials") | |
409 | |
410 # Add instructions | |
411 form.instructions = [ | |
412 D_( | |
413 "Please provide your IMAP and SMTP credentials to configure the " | |
414 "connection." | |
415 ) | |
416 ] | |
417 | |
418 # Add identity fields | |
419 form.addField( | |
420 data_form.Field( | |
421 fieldType="text-single", | |
422 var="user_name", | |
423 label="User Name", | |
424 desc=D_('The display name to use in the "From" field of sent emails.'), | |
425 value=credentials.get("user_name"), | |
426 required=True, | |
427 ) | |
428 ) | |
429 | |
430 form.addField( | |
431 data_form.Field( | |
432 fieldType="text-single", | |
433 var="user_email", | |
434 label="User Email", | |
435 desc=D_('The email address to use in the "From" field of sent emails.'), | |
436 value=credentials.get("user_email"), | |
437 required=True, | |
438 ) | |
439 ) | |
440 | |
441 # Add fields for IMAP credentials | |
442 form.addField( | |
443 data_form.Field( | |
444 fieldType="text-single", | |
445 var="imap_host", | |
446 label="IMAP Host", | |
447 desc=D_("IMAP server hostname or IP address"), | |
448 value=credentials.get("imap_host"), | |
449 required=True, | |
450 ) | |
451 ) | |
452 form.addField( | |
453 data_form.Field( | |
454 fieldType="text-single", | |
455 var="imap_port", | |
456 label="IMAP Port", | |
457 desc=D_("IMAP server port (default: 993)"), | |
458 value=credentials.get("imap_port", "993"), | |
459 ) | |
460 ) | |
461 form.addField( | |
462 data_form.Field( | |
463 fieldType="text-single", | |
464 var="imap_username", | |
465 label="IMAP Username", | |
466 desc=D_("Username for IMAP authentication"), | |
467 value=credentials.get("imap_username"), | |
468 required=True, | |
469 ) | |
470 ) | |
471 form.addField( | |
472 data_form.Field( | |
473 fieldType="text-private", | |
474 var="imap_password", | |
475 label="IMAP Password", | |
476 desc=D_("Password for IMAP authentication"), | |
477 value=credentials.get("imap_password"), | |
478 required=True, | |
479 ) | |
480 ) | |
481 | |
482 # Add fields for SMTP credentials | |
483 form.addField( | |
484 data_form.Field( | |
485 fieldType="text-single", | |
486 var="smtp_host", | |
487 label="SMTP Host", | |
488 desc=D_("SMTP server hostname or IP address"), | |
489 value=credentials.get("smtp_host"), | |
490 required=True, | |
491 ) | |
492 ) | |
493 form.addField( | |
494 data_form.Field( | |
495 fieldType="text-single", | |
496 var="smtp_port", | |
497 label="SMTP Port", | |
498 desc=D_("SMTP server port (default: 587)"), | |
499 value=credentials.get("smtp_port", "587"), | |
500 ) | |
501 ) | |
502 form.addField( | |
503 data_form.Field( | |
504 fieldType="text-single", | |
505 var="smtp_username", | |
506 label="SMTP Username", | |
507 desc=D_("Username for SMTP authentication"), | |
508 value=credentials.get("smtp_username"), | |
509 required=True, | |
510 ) | |
511 ) | |
512 form.addField( | |
513 data_form.Field( | |
514 fieldType="text-private", | |
515 var="smtp_password", | |
516 label="SMTP Password", | |
517 desc=D_("Password for SMTP authentication"), | |
518 value=credentials.get("smtp_password"), | |
519 required=True, | |
520 ) | |
521 ) | |
522 | |
523 return bool(credentials), form | |
524 | |
525 def validate_field( | |
526 self, | |
527 form: data_form.Form, | |
528 key: str, | |
529 field_type: str, | |
530 min_value: int | None = None, | |
531 max_value: int | None = None, | |
532 default: str | int | None = None, | |
533 ) -> None: | |
534 """Validate a single field. | |
535 | |
536 @param form: The form containing the fields. | |
537 @param key: The key of the field to validate. | |
538 @param field_type: The expected type of the field value. | |
539 @param min_value: Optional minimum value for integer fields. | |
540 @param max_value: Optional maximum value for integer fields. | |
541 @param default: Default value to use if the field is missing. | |
542 @raise StanzaError: If the field value is invalid or missing. | |
543 """ | |
544 field = form.fields.get(key) | |
545 if field is None: | |
546 if default is None: | |
547 raise StanzaError("bad-request", text=f"{key} is required") | |
548 field = data_form.Field(var=key, value=str(default)) | |
549 form.addField(field) | |
550 | |
551 value = field.value | |
552 if field_type == "int": | |
553 try: | |
554 value = int(value) | |
555 if (min_value is not None and value < min_value) or ( | |
556 max_value is not None and value > max_value | |
557 ): | |
558 raise ValueError | |
559 except (ValueError, TypeError): | |
560 raise StanzaError("bad-request", text=f"Invalid value for {key}: {value}") | |
561 elif field_type == "str": | |
562 if not isinstance(value, str): | |
563 raise StanzaError("bad-request", text=f"Invalid value for {key}: {value}") | |
564 | |
565 # Basic email validation for user_email field | |
566 if key == "user_email": | |
567 # XXX: This is a minimal check. A complete email validation is notoriously | |
568 # difficult. | |
569 if not email_pattern.match(value): | |
570 raise StanzaError( | |
571 "bad-request", text=f"Invalid email address: {value}" | |
572 ) | |
573 | |
574 def validate_imap_smtp_form(self, submit_form: data_form.Form) -> None: | |
575 """Validate the submitted IMAP/SMTP credentials form. | |
576 | |
577 @param submit_form: The submitted form containing IMAP/SMTP credentials. | |
578 @raise StanzaError: If any of the values are invalid. | |
579 """ | |
580 # Validate identity fields | |
581 self.validate_field(submit_form, "user_name", "str") | |
582 self.validate_field(submit_form, "user_email", "str") | |
583 | |
584 # Validate IMAP fields | |
585 self.validate_field(submit_form, "imap_host", "str") | |
586 self.validate_field( | |
587 submit_form, "imap_port", "int", min_value=1, max_value=65535, default=993 | |
588 ) | |
589 self.validate_field(submit_form, "imap_username", "str") | |
590 self.validate_field(submit_form, "imap_password", "str") | |
591 | |
592 # Validate SMTP fields | |
593 self.validate_field(submit_form, "smtp_host", "str") | |
594 self.validate_field( | |
595 submit_form, "smtp_port", "int", min_value=1, max_value=65535, default=587 | |
596 ) | |
597 self.validate_field(submit_form, "smtp_username", "str") | |
598 self.validate_field(submit_form, "smtp_password", "str") | |
599 | |
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600 def email_to_jid( |
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601 self, |
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602 client: SatXMPPEntity, |
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603 user_email: str, |
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604 user_jid: jid.JID, |
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605 email_name: str, |
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606 email_addr: str, |
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607 ) -> tuple[jid.JID, str | None]: |
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608 """Convert an email address to a JID and extract the name if present. |
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609 |
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610 @param client: Client session. |
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611 @param user_email: Email address of the gateway user. |
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612 @param user_jid: JID of the gateway user. |
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613 @param email_name: Email associated name. |
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614 @param email_addr: Email address. |
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615 @return: Tuple of JID and name (if present). |
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616 """ |
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617 email_name = email_name.strip() |
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618 if email_name.startswith("xmpp:"): |
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619 return jid.JID(email_name[5:]), None |
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620 elif email_addr == user_email: |
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621 return (user_jid, None) |
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622 else: |
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623 return ( |
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624 jid.JID(None, (self._e.escape(email_addr), client.jid.host, None)), |
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625 email_name or None, |
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626 ) |
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627 |
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628 async def on_new_email( |
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629 self, user_data: UserData, user_jid: jid.JID, email: EmailMessage |
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630 ) -> None: |
4303 | 631 """Called when a new message has been received. |
632 | |
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633 @param user_data: user data, used to map registered user email to corresponding |
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634 jid. |
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635 @param user_jid: JID of the recipient. |
4303 | 636 @param email: Parsed email. |
637 """ | |
638 assert self.client is not None | |
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639 user_email = user_data.credentials["user_email"] |
4303 | 640 name, email_addr = parseaddr(email["from"]) |
641 email_addr = email_addr.lower() | |
642 from_jid = jid.JID(None, (self._e.escape(email_addr), self.client.jid.host, None)) | |
643 | |
644 # Get the email body | |
645 body_mime = email.get_body(("plain",)) | |
646 if body_mime is not None: | |
647 charset = body_mime.get_content_charset() or "utf-8" | |
648 body = body_mime.get_payload(decode=True).decode(charset, errors="replace") | |
649 else: | |
650 log.warning(f"No body found in email:\n{email}") | |
651 body = "" | |
652 | |
653 # Decode the subject | |
654 subject = email.get("subject") | |
655 if subject: | |
656 decoded_subject = decode_header(subject) | |
657 subject = "".join( | |
658 [ | |
659 part.decode(encoding or "utf-8") if isinstance(part, bytes) else part | |
660 for part, encoding in decoded_subject | |
661 ] | |
662 ).strip() | |
663 else: | |
664 subject = None | |
665 | |
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666 # Parse recipient fields |
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667 kwargs = {} |
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668 for field in RECIPIENT_FIELDS: |
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669 email_addresses = email.get_all(field) |
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670 if email_addresses: |
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671 jids_and_names = [ |
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672 self.email_to_jid(self.client, user_email, user_jid, name, addr) |
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673 for name, addr in getaddresses(email_addresses) |
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674 ] |
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675 kwargs[field] = [ |
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676 AddressType(jid=jid, desc=name) for jid, name in jids_and_names |
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677 ] |
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678 |
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679 # At least "to" header should be set, so kwargs should never be empty |
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680 assert kwargs |
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681 addresses_data = AddressesData(**kwargs) |
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682 |
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683 # Parse reply-to field |
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684 reply_to_addresses = email.get_all("reply-to") |
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685 if reply_to_addresses: |
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686 jids_with_names = [ |
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687 self.email_to_jid(self.client, user_email, user_jid, name, addr) |
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688 for name, addr in getaddresses(reply_to_addresses) |
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689 ] |
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690 addresses_data.replyto = [ |
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691 AddressType(jid=jid, desc=name) for jid, name in jids_with_names |
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692 ] |
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693 |
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694 # Set noreply flag |
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695 # The is no flag to indicate a no-reply message, so we check common user parts in |
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696 # from and reply-to headers. |
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697 from_addresses = [email_addr] |
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698 if reply_to_addresses: |
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699 from_addresses.extend( |
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700 addr for a in reply_to_addresses if (addr := parseaddr(a)[1]) |
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701 ) |
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702 for from_address in from_addresses: |
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703 from_user_part = from_address.split("@", 1)[0].lower() |
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704 if from_user_part in ( |
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|
705 "no-reply", |
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|
706 "noreply", |
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707 "do-not-reply", |
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|
708 "donotreply", |
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|
709 "notification", |
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|
710 "notifications", |
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|
711 ): |
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|
712 addresses_data.noreply = True |
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|
713 break |
4317
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714 extra = {} |
4309
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|
715 |
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|
716 if ( |
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|
717 not addresses_data.replyto |
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|
718 and not addresses_data.noreply |
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719 and not addresses_data.cc |
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|
720 and not addresses_data.bcc |
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721 and addresses_data.to == [AddressType(jid=user_jid)] |
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|
722 ): |
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723 # The main recipient is the only one, and there is no other metadata: there is |
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724 # no need to add addresses metadata. |
4317
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|
725 pass |
4309
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|
726 else: |
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|
727 for address in addresses_data.addresses: |
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|
728 if address.jid and ( |
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729 address.jid == user_jid or address.jid.host == str(self.client.jid) |
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|
730 ): |
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|
731 # Those are email address, and have been delivered by the sender, |
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732 # other JID addresses will have to be delivered by us. |
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733 address.delivered = True |
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|
734 |
4317
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735 extra["addresses"] = addresses_data.model_dump(mode="json", exclude_none=True) |
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|
736 |
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|
737 # We look for interesting headers |
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738 headers = {} |
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739 keywords_headers = email.get_all("keywords") |
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|
740 if keywords_headers: |
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741 keywords = ",".join(keywords_headers) |
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742 headers["keywords"] = keywords |
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743 |
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744 importance = email["importance"] |
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|
745 if importance: |
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|
746 # We convert to urgency |
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747 if importance in ("low", "high"): |
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748 headers["urgency"] = importance |
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749 elif importance == "normal": |
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|
750 headers["urgency"] = "medium" |
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751 else: |
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|
752 log.warning("Ignoring invalid importance header: {importance!r}") |
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|
753 |
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754 if headers: |
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|
755 extra["headers"] = HeadersData(**headers).model_dump( |
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|
756 mode="json", exclude_none=True |
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|
757 ) |
4309
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758 |
4303 | 759 client = self.client.get_virtual_client(from_jid) |
4309
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|
760 await client.sendMessage( |
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|
761 user_jid, |
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|
762 {"": body}, |
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|
763 {"": subject} if subject else None, |
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|
764 extra=extra, |
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|
765 ) |
4303 | 766 |
767 async def connect_imap(self, from_jid: jid.JID, user_data: UserData) -> None: | |
768 """Connect to IMAP service. | |
769 | |
770 [self.on_new_email] will be used as callback on new messages. | |
771 | |
772 @param from_jid: JID of the user associated with given credentials. | |
773 @param credentials: Email credentials. | |
774 """ | |
775 credentials = user_data.credentials | |
776 | |
777 connected = defer.Deferred() | |
778 factory = IMAPClientFactory( | |
779 user_data, | |
4309
b56b1eae7994
component email gateway: add multicasting:
Goffi <goffi@goffi.org>
parents:
4303
diff
changeset
|
780 partial(self.on_new_email, user_data, from_jid.userhostJID()), |
4303 | 781 connected, |
782 ) | |
783 reactor.connectTCP( | |
784 credentials["imap_host"], int(credentials["imap_port"]), factory | |
785 ) | |
786 await connected | |
787 | |
788 async def _on_registration_submit( | |
789 self, | |
790 client: SatXMPPEntity, | |
791 iq_elt: domish.Element, | |
792 submit_form: data_form.Form | None, | |
793 ) -> bool | None: | |
794 """Handle registration submit request. | |
795 | |
796 Submit form is validated, and credentials are stored. | |
797 @param client: client session. | |
798 iq_elt: IQ stanza of the submission request. | |
799 submit_form: submit form. | |
800 @return: True if successful. | |
801 None if the callback is not relevant for this request. | |
802 """ | |
803 if client != self.client: | |
804 return | |
805 assert self.storage is not None | |
806 from_jid = jid.JID(iq_elt["from"]).userhostJID() | |
807 | |
808 if submit_form is None: | |
809 # This is an unregistration request. | |
810 try: | |
811 user_data = self.users_data[from_jid] | |
812 except KeyError: | |
813 pass | |
814 else: | |
815 if user_data.imap_client is not None: | |
816 try: | |
817 await user_data.imap_client.logout() | |
818 except Exception: | |
819 log.exception(f"Can't log out {from_jid} from IMAP server.") | |
820 key = KEY_CREDENTIALS.format(from_jid=from_jid) | |
821 await self.storage.adel(key) | |
822 log.info(f"{from_jid} unregistered from this gateway.") | |
823 return True | |
824 | |
825 self.validate_imap_smtp_form(submit_form) | |
826 credentials = {key: field.value for key, field in submit_form.fields.items()} | |
827 user_data = self.users_data.get(from_jid) | |
828 if user_data is None: | |
829 # The user is not in cache, we cache current credentials. | |
830 user_data = self.users_data[from_jid] = UserData(credentials=credentials) | |
831 else: | |
832 # The user is known, we update credentials. | |
833 user_data.credentials = credentials | |
834 key = KEY_CREDENTIALS.format(from_jid=from_jid) | |
835 try: | |
836 await self.connect_imap(from_jid, user_data) | |
837 except Exception as e: | |
838 log.warning(f"Can't connect to IMAP server for {from_jid}") | |
839 credentials["imap_success"] = False | |
840 await self.storage.aset(key, credentials) | |
841 raise e | |
842 else: | |
843 log.debug(f"Connection successful to IMAP server for {from_jid}") | |
844 credentials["imap_success"] = True | |
845 await self.storage.aset(key, credentials) | |
846 return True | |
847 | |
848 | |
849 @implementer(iwokkel.IDisco) | |
850 class EmailGatewayHandler(XMPPHandler): | |
851 | |
852 def getDiscoInfo(self, requestor, target, nodeIdentifier=""): | |
853 return [] | |
854 | |
855 def getDiscoItems(self, requestor, target, nodeIdentifier=""): | |
856 return [] |