229 lines
8.1 KiB
Python
229 lines
8.1 KiB
Python
import attr
|
|
import random
|
|
import paho.mqtt.client
|
|
from ._core import log
|
|
from . import _util, _graphql
|
|
|
|
|
|
def generate_session_id():
|
|
"""Generate a random session ID between 1 and 9007199254740991."""
|
|
return random.randint(1, 2 ** 53)
|
|
|
|
|
|
@attr.s(slots=True)
|
|
class Mqtt:
|
|
_state = attr.ib()
|
|
_mqtt = attr.ib()
|
|
_on_message = attr.ib()
|
|
_chat_on = attr.ib()
|
|
_foreground = attr.ib()
|
|
_session_id = attr.ib(factory=generate_session_id)
|
|
_sync_token = attr.ib(None)
|
|
|
|
_HOST = "edge-chat.facebook.com"
|
|
|
|
@classmethod
|
|
def connect(cls, state, on_message, chat_on, foreground):
|
|
mqtt = paho.mqtt.client.Client(
|
|
client_id="mqttwsclient",
|
|
clean_session=True,
|
|
protocol=paho.mqtt.client.MQTTv31,
|
|
transport="websockets",
|
|
)
|
|
|
|
self = cls(
|
|
state=state,
|
|
mqtt=mqtt,
|
|
on_message=on_message,
|
|
chat_on=chat_on,
|
|
foreground=foreground,
|
|
)
|
|
|
|
mqtt.enable_logger()
|
|
# mqtt.max_inflight_messages_set(20)
|
|
# mqtt.max_queued_messages_set(0) # unlimited
|
|
# mqtt.message_retry_set(5)
|
|
# mqtt.reconnect_delay_set(min_delay=1, max_delay=120)
|
|
# TODO: Is region (lla | atn | odn | others?) important?
|
|
mqtt.tls_set()
|
|
mqtt.ws_set_options(
|
|
path="/chat?sid={}".format(session_id), headers=self._create_headers
|
|
)
|
|
mqtt.on_message = self._on_message_handler
|
|
|
|
sequence_id = self._fetch_sequence_id(self._state)
|
|
# Set connect/reconnect data with an empty sync token and an newly fetched
|
|
# sequence id initially
|
|
self._set_reconnect_data(self._sync_token, sequence_id)
|
|
|
|
# TODO: Handle response code
|
|
response_code = mqtt.connect(self._HOST, 443, keepalive=10)
|
|
|
|
def _create_headers(self, headers):
|
|
log.debug("Fetching MQTT headers")
|
|
# TODO: Make this access thread safe
|
|
headers["Cookie"] = _util.get_cookie_header(self._state._session, self._HOST)
|
|
headers["User-Agent"] = self._state._session.headers["User-Agent"]
|
|
headers["Origin"] = "https://www.facebook.com"
|
|
headers["Host"] = self._HOST
|
|
return headers
|
|
|
|
def _on_message_handler(self, client, userdata, message):
|
|
j = _util.parse_json(message.payload)
|
|
if message.topic == "/t_ms":
|
|
sequence_id = None
|
|
|
|
# Update sync_token when received
|
|
# This is received in the first message after we've created a messenger
|
|
# sync queue.
|
|
if "syncToken" in j and "firstDeltaSeqId" in j:
|
|
self._sync_token = j["syncToken"]
|
|
sequence_id = j["firstDeltaSeqId"]
|
|
|
|
# Update last sequence id when received
|
|
if "lastIssuedSeqId" in j:
|
|
sequence_id = j["lastIssuedSeqId"]
|
|
|
|
if sequence_id is not None:
|
|
self._set_reconnect_data(self._sync_token, sequence_id)
|
|
|
|
# Call the external callback
|
|
self._on_message(message.topic, j)
|
|
|
|
@staticmethod
|
|
def _fetch_sequence_id(state):
|
|
"""Fetch sequence ID."""
|
|
params = {
|
|
"limit": 1,
|
|
"tags": ["INBOX"],
|
|
"before": None,
|
|
"includeDeliveryReceipts": False,
|
|
"includeSeqID": True,
|
|
}
|
|
log.debug("Fetching MQTT sequence ID")
|
|
# Same request as in `Client.fetchThreadList`
|
|
(j,) = state._graphql_requests(_graphql.from_doc_id("1349387578499440", params))
|
|
try:
|
|
return int(j["viewer"]["message_threads"]["sync_sequence_id"])
|
|
except (KeyError, ValueError):
|
|
# TODO: Proper exceptions
|
|
raise
|
|
|
|
@staticmethod
|
|
def _get_messenger_sync(state, sync_token, sequence_id):
|
|
"""Get the data to configure receiving messages."""
|
|
payload = {
|
|
"sync_api_version": 10,
|
|
"max_deltas_able_to_process": 1000,
|
|
"delta_batch_size": 500,
|
|
"encoding": "JSON",
|
|
"entity_fbid": state.user_id,
|
|
}
|
|
|
|
# If we don't have a sync_token, create a new messenger queue
|
|
# This is done so that across reconnects, if we've received a sync token, we
|
|
# SHOULD receive a piece of data in /t_ms exactly once!
|
|
if sync_token is None:
|
|
topic = "/messenger_sync_create_queue"
|
|
payload["initial_titan_sequence_id"] = str(sequence_id)
|
|
payload["device_params"] = None
|
|
else:
|
|
topic = "/messenger_sync_get_diffs"
|
|
payload["last_seq_id"] = str(sequence_id)
|
|
payload["sync_token"] = sync_token
|
|
|
|
return topic, payload
|
|
|
|
def _set_reconnect_data(self, sync_token, sequence_id):
|
|
log.debug("Setting MQTT reconnect data: %s/%s", sync_token, sequence_id)
|
|
topic, payload = self._get_messenger_sync(self._state, sync_token, sequence_id)
|
|
|
|
username = {
|
|
# The user ID
|
|
"u": self._state.user_id,
|
|
# Session ID
|
|
"s": self._session_id,
|
|
# Active status setting
|
|
"chat_on": self._chat_on,
|
|
# foreground_state - Whether the window is focused
|
|
"fg": self._foreground,
|
|
# Can be any random ID
|
|
"d": self._state._client_id,
|
|
# Application ID, taken from facebook.com
|
|
"aid": 219994525426954,
|
|
# MQTT extension by FB, allows making a SUBSCRIBE while CONNECTing
|
|
"st": [
|
|
# TODO: Investigate the result from these
|
|
# "/inbox",
|
|
# "/mercury",
|
|
# "/messaging_events",
|
|
# "/orca_message_notifications",
|
|
# "/pp",
|
|
# "/t_p",
|
|
# "/t_rtc",
|
|
# "/webrtc_response",
|
|
"/legacy_web",
|
|
"/webrtc",
|
|
"/onevc",
|
|
# Things that happen in chats (e.g. messages)
|
|
"/t_ms",
|
|
# Group typing notifications
|
|
"/thread_typing",
|
|
# Private chat typing notifications
|
|
"/orca_typing_notifications",
|
|
"/notify_disconnect",
|
|
# Active notifications
|
|
"/orca_presence",
|
|
"/br_sr",
|
|
"/sr_res",
|
|
],
|
|
# MQTT extension by FB, allows making a PUBLISH while CONNECTing
|
|
"pm": [
|
|
{
|
|
"topic": topic,
|
|
"payload": _util.json_minimal(payload),
|
|
"qos": 1,
|
|
"messageId": 65536,
|
|
}
|
|
# The above is more efficient, but the same effect could have been
|
|
# acheived with:
|
|
# def on_connect(*args):
|
|
# mqtt.publish(topic, payload=..., qos=1)
|
|
# mqtt.on_connect = on_connect
|
|
],
|
|
# Unknown parameters
|
|
"cp": 3,
|
|
"ecp": 10,
|
|
"ct": "websocket",
|
|
"mqtt_sid": "",
|
|
"dc": "",
|
|
"no_auto_fg": True,
|
|
"gas": None,
|
|
"pack": [],
|
|
}
|
|
|
|
# TODO: Make this thread safe
|
|
self._mqtt.username_pw_set(_util.json_minimal(username))
|
|
|
|
def listen(self):
|
|
self._mqtt.loop_forever() # TODO: retry_first_connection=True?
|
|
|
|
def disconnect(self):
|
|
self._mqtt.disconnect()
|
|
|
|
def set_foreground(self, value):
|
|
payload = _util.json_minimal({"foreground": value})
|
|
info = self._mqtt.publish("/foreground_state", payload=payload, qos=1)
|
|
self._foreground = value
|
|
# TODO: We can't wait for this, since the loop is running with .loop_forever()
|
|
# info.wait_for_publish()
|
|
|
|
# def set_client_settings(self, available_when_in_foreground: bool):
|
|
# data = {"make_user_available_when_in_foreground": available_when_in_foreground}
|
|
# payload = _util.json_minimal(data)
|
|
# info = self._mqtt.publish("/set_client_settings", payload=payload, qos=1)
|
|
#
|
|
# def send_additional_contacts(self, additional_contacts):
|
|
# payload = _util.json_minimal({"additional_contacts": additional_contacts})
|
|
# info = self._mqtt.publish("/send_additional_contacts", payload=payload, qos=1)
|