我正在一个基本的django站点上放置django通道，配置方式如下。
consumers.py
from channels.generic.websocket import WebsocketConsumer
import json
class ChatConsumer(WebsocketConsumer):
def connect(self):
self.accept()
def disconnect(self, close_code):
pass
def receive(self, text_data):
text_data_json = json.loads(text_data)
message = text_data_json['message']
self.send(text_data=json.dumps({
'message': message
}))
routing.py
from django.conf.urls import url
from consumers import ChatConsumer
#supposed to be on the main routing
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
websocket_urlpatterns = [
url(r'^ws/chat/$', ChatConsumer),
]
#after linking to above as chat.routing
application = ProtocolTypeRouter({
# (http->django views is added by default)
'websocket': AuthMiddlewareStack(
URLRouter(
websocket_urlpatterns
)
),
})
settings.py
ASGI_APPLICATION = 'chatsys.routing.application'
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('35.185.80.98', 6379)],
},
},
}
INSTALLED_APPS = [
...
'channels',
]
安装必要的应用程序后，我转到教程中的下一步，该教程将在 shell 上对此进行测试。
In [1]: import channels.layers
In [2]: from asgiref.sync import async_to_sync
In [3]: async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
<ipython-input-3-80e65666e9e2> in <module>()
----> 1 async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})
NameError: name 'channel_layer' is not defined
In [4]: channel_layer = channels.layers.get_channel_layer()
In [5]: async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})
---------------------------------------------------------------------------
TimeoutError Traceback (most recent call last)
<ipython-input-5-80e65666e9e2> in <module>()
----> 1 async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})
~/webapp/chatenv/lib/python3.6/site-packages/asgiref/sync.py in __call__(self, *args, **kwargs)
62 )
63 # Wait for results from the future.
---> 64 return call_result.result()
65
66 def __get__(self, parent, objtype):
/usr/lib/python3.6/concurrent/futures/_base.py in result(self, timeout)
423 raise CancelledError()
424 elif self._state == FINISHED:
--> 425 return self.__get_result()
426
427 self._condition.wait(timeout)
...
451
452 def _sock_connect(self, fut, sock, address):
/usr/lib/python3.6/asyncio/selector_events.py in _sock_connect_cb(self, fut, sock, address)
478 if err != 0:
479 # Jump to any except clause below.
--> 480 raise OSError(err, 'Connect call failed %s' % (address,))
481 except (BlockingIOError, InterruptedError):
482 # socket is still registered, the callback will be retried later
TimeoutError: [Errno 110] Connect call failed ('35.185.80.98', 6379)
它无法连接并返回连接失败。 我认为问题可能是 redis 未处于活动状态，所以我退出 shell 并检查了结果。
(chatenv) muiruri_samuel@train:~/webapp/chatsys$ sudo docker run -p 6379:6379 -d redis:2.8
87ee2decc507984ffa153f7b9367a51786bc16ebf6ea330ebb0a030d99b60854
docker: Error response from daemon: driver failed programming external connectivity on endpoint infallible_payne (f40e48395d0e09e2741b1083b548ff2d0843f7ec150294
dbbb72acb3d5f61ea1): Bind for 0.0.0.0:6379 failed: port is already allocated.
因此，端口已分配并正在运行。
发现问题是在设置而不是本地主机上设置服务器的 IP
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('127.0.0.1', 6379)],
},
},
}
所以把它换成这个工作了。
请检查服务器端口。是否可以从服务器外部连接。我的意思是它从公共互联网连接。我认为这就是问题所在。
在 Linux 终端或 Windows cmd 中运行此命令，以检查端口是否可用于从物理机网络连接。
telnet 35.185.80.98 6379
使用以下代码：
from channels.layers import get_channel_layer
channel_layer = get_channel_layer()