django

pip3 install channels==2.1.7

在seetings里注册 channels

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'channels',
]
ASGI_APPLICATION = "luffyapi.routing.application"

routing.py 文件
from channels.routing import ProtocolTypeRouter, URLRouter
from django.conf.urls import url
# from chat import consumers


application = ProtocolTypeRouter({
    'websocket': URLRouter([
        # url(r'^chat/$', consumers.ChatConsumer),
    ])
})
====================================================================
consumers.py 文件
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer
class ChatConsumer(WebsocketConsumer):
    def websocket_connect(self, message):
        self.accept()
        self.send(text_data='收到了')
        print(self.scope.get('query_string').decode('UTF-8','strict'))

    def websocket_receive(self, message):
        print('接收到消息')
        print('接收到消息', message)
        # self.send(text_data='收到了')

    def websocket_disconnect(self, message):
        print('客户端断开连接了')
        raise StopConsumer()


前端
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <textarea class="form-control" id="chat-log" disabled rows="20"></textarea><br/>
  <input class="form-control" id="chat-message-input" type="text"/><br/>
  <input class="btn btn-success btn-block" id="chat-message-submit" type="button"  onclick="send()" />

</body>

<script>
  var chatSocket = new WebSocket('ws://127.0.0.1:8000/chat/?123')

  function send(){
      chatSocket.send('asdc')
  }

</script>
</html>


=======================================================

基于 redis的channel layer

pip3 install channels-redis

channels_redis 不同情况参考配置

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": {
            "hosts": [('10.211.55.25', 6379)]
        },
    },
}


CHANNEL_LAYERS = {
    'default': {
    'BACKEND': 'channels_redis.core.RedisChannelLayer',
    'CONFIG': {"hosts": ["redis://10.211.55.25:6379/1"],},
    },
}
 

CHANNEL_LAYERS = {
    'default': {
    'BACKEND': 'channels_redis.core.RedisChannelLayer',
    'CONFIG': {"hosts": [('10.211.55.25', 6379)],},},
}
 

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels_redis.core.RedisChannelLayer",
        "CONFIG": {
            "hosts": ["redis://:password@10.211.55.25:6379/0"],
            "symmetric_encryption_keys": [SECRET_KEY],
        },
    },
}
============================================================================
from channels.generic.websocket import WebsocketConsumer, AsyncWebsocketConsumer
from asgiref.sync import async_to_sync
import json
class AsyncConsumer(AsyncWebsocketConsumer):
    async def connect(self):  # 连接时触发
        self.room_name = self.scope['url_route']['kwargs']['room_name']    # 获取地址栏的参数
        self.room_group_name = 'notice_%s' % self.room_name  # 直接从用户指定的房间名称构造Channels组名称，不进行任何引用或转义。

        # 将新的连接加入到群组
        await self.channel_layer.group_add(
            self.room_group_name,
            self.channel_name
        )

        await self.accept()



    async def disconnect(self, close_code):  # 断开时触发
        # 将关闭的连接从群组中移除
        await self.channel_layer.group_discard(
            self.room_group_name,
            self.channel_name
        )



 async def receive(self, text_data=None, bytes_data=None):  # 接收消息时触发
        text_data_json = json.loads(text_data)
        message = text_data_json['message']

        # 信息群发
        await self.channel_layer.group_send(
            self.room_group_name,
            {
                'type': 'system_message',
                'message': message
            }
        )

    # Receive message from room group
    async def system_message(self, event):
        print(event)
        message = event['message']

        # Send message to WebSocket单发消息
        await self.send(text_data=json.dumps({
            'message': message
        }))


应用下创建 routing.py （类似Django路由）

apps/assets/routing.py

from django.conf.urls import url
from assets import consumers

websocket_urlpatterns = [
    # url(r'^ws/msg/(?P<room_name>[^/]+)/$', consumers.SyncConsumer),
    url(r'^ws/msg/(?P<room_name>[^/]+)/$', consumers.AsyncConsumer),
]

 

修改项目下 routing.py （主WS路由）

StarMeow/routing.py

 

from channels.routing import ProtocolTypeRouter, URLRouter
from channels.auth import AuthMiddlewareStack
from channels.sessions import SessionMiddlewareStack
import assets.routing

application = ProtocolTypeRouter({
    # (http->django views is added by default)
    # 【channels】（第6步）添加路由配置指向应用的路由模块
    'websocket': SessionMiddlewareStack(  # 使用Session中间件，可以请求中session的值
        URLRouter(
            assets.routing.websocket_urlpatterns
        )
    ),
})
 
 









posted on 2021-02-17 18:09  Plyc  阅读(82)  评论(0)  编辑  收藏  举报

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