awx/awx/main/consumers.py
2017-11-27 19:41:30 +00:00

101 lines
3.7 KiB
Python

import json
import logging
import urllib
from channels import Group, channel_layers
from channels.sessions import channel_session
from channels.handler import AsgiRequest
from django.conf import settings
from django.core.serializers.json import DjangoJSONEncoder
from django.contrib.auth.models import User
from awx.main.models.organization import AuthToken
logger = logging.getLogger('awx.main.consumers')
def discard_groups(message):
if 'groups' in message.channel_session:
for group in message.channel_session['groups']:
Group(group).discard(message.reply_channel)
@channel_session
def ws_connect(message):
message.reply_channel.send({"accept": True})
message.content['method'] = 'FAKE'
request = AsgiRequest(message)
token = request.COOKIES.get('token', None)
if token is not None:
token = urllib.unquote(token).strip('"')
try:
auth_token = AuthToken.objects.get(key=token)
if auth_token.in_valid_tokens:
message.channel_session['user_id'] = auth_token.user_id
message.reply_channel.send({"text": json.dumps({"accept": True, "user": auth_token.user_id})})
return None
except AuthToken.DoesNotExist:
logger.error("auth_token provided was invalid.")
message.reply_channel.send({"close": True})
return None
@channel_session
def ws_disconnect(message):
discard_groups(message)
@channel_session
def ws_receive(message):
from awx.main.access import consumer_access
channel_layer_settings = channel_layers.configs[message.channel_layer.alias]
max_retries = channel_layer_settings.get('RECEIVE_MAX_RETRY', settings.CHANNEL_LAYER_RECEIVE_MAX_RETRY)
user_id = message.channel_session.get('user_id', None)
if user_id is None:
retries = message.content.get('connect_retries', 0) + 1
message.content['connect_retries'] = retries
message.reply_channel.send({"text": json.dumps({"error": "no valid user"})})
retries_left = max_retries - retries
if retries_left > 0:
message.channel_layer.send(message.channel.name, message.content)
else:
logger.error("No valid user found for websocket.")
return None
user = User.objects.get(pk=user_id)
raw_data = message.content['text']
data = json.loads(raw_data)
if 'groups' in data:
discard_groups(message)
groups = data['groups']
current_groups = set(message.channel_session.pop('groups') if 'groups' in message.channel_session else [])
for group_name,v in groups.items():
if type(v) is list:
for oid in v:
name = '{}-{}'.format(group_name, oid)
access_cls = consumer_access(group_name)
if access_cls is not None:
user_access = access_cls(user)
if not user_access.get_queryset().filter(pk=oid).exists():
message.reply_channel.send({"text": json.dumps(
{"error": "access denied to channel {0} for resource id {1}".format(group_name, oid)})})
continue
current_groups.add(name)
Group(name).add(message.reply_channel)
else:
current_groups.add(group_name)
Group(group_name).add(message.reply_channel)
message.channel_session['groups'] = list(current_groups)
def emit_channel_notification(group, payload):
try:
Group(group).send({"text": json.dumps(payload, cls=DjangoJSONEncoder)})
except ValueError:
logger.error("Invalid payload emitting channel {} on topic: {}".format(group, payload))