老师我的私信模块的websocket一直都是报错无法握手(包括notifications模块也是无法握手成功)：

WebSocket HANDSHAKING /ws/test1/ [192.168.60.1:63543]
WebSocket DISCONNECT /ws/test1/ [192.168.60.1:63543]

如果忽略这个错误，直接发信息给其他用户的话就会报如下错误：

Not Found: /messages/send-message/
HTTP POST /messages/send-message/ 404 [0.01, 192.168.60.1:63873]

检查了很多次实在无法解决，我的版本django2.2，channels2.4。

我的consumer.py

class MessagesConsumer(AsyncWebsocketConsumer):
    """处理私信应用中的Websocket请求"""
    async def connect(self):
        """加入聊天组"""
        if self.scope['user'].is_anonymous:
            await self.close()
        else:
            await self.channel_layer.group.add(self.scope['user'].username, self.channel_name)
            await self.accept()

    async def receive(self, text_data=None, bytes_data=None):
        """接收私信"""
        await self.send(text_data=json.dumps(text_data))

    async def disconnect(self, code):
        """离开聊天组"""
        await self.channel_layer.group.discard(self.scope['user'].username, self.channel_name)

我的routing.py

application = ProtocolTypeRouter({
    'websocket': AllowedHostsOriginValidator(
        AuthMiddlewareStack(
            URLRouter([
                path('ws/notifications/', NotificationsConsumer),
                path('ws/<str:username>/', MessagesConsumer),
            ])
        )
    )
})

我的views.py

@login_required
@ajax_required
@require_http_methods(["POST"])
def send_message(request):
    """发送私信"""
    sender = request.user
    recipient_username = request.POST["to"]
    recipient = get_user_model().objects.get(username=recipient_username)
    message = request.POST["message"]
    if len(message.strip()) != 0 and sender != recipient:
        msg = Message.objects.create(
            sender=sender,
            recipient=recipient,
            message=message
        )
        channel_layer = get_channel_layer()
        payload = {
            'type': 'receive',
            'message': render_to_string('messager/single_message.html', {'message': msg}),
            'sender': sender.username
        }
        async_to_sync(channel_layer.group.send)(recipient_username, payload)
        return render(request, 'messager/single_message.html', {"message": msg})
    return HttpResponse()

我的urls.py

app_name = 'messager'

urlpatterns = [
    path('', views.MessagesListView.as_view(), name="messages_list"),
    path('send-message/', views.send_message, name="send_message"),
    path('<username>/', views.ConversationListView.as_view(), name="conversation_detail"),
]

messager.js 与您的源代码一致

麻烦老师帮我看看~