django使用channels实现通信的示例

1.安装依赖包

pip install channels channels-redis

2.settings.py 修改加上支持

INSTALLED_APPS = [

'django.contrib.admin',

'django.contrib.auth',

'django.contrib.contenttypes',

'django.contrib.sessions',

'django.contrib.messages',

'django.contrib.staticfiles',

'MyWeb.apps.MywebConfig',

"channels",

]

首先需要建立一个django项目。其中在你自己的app下面 生成consumers.py和routing.py配置文件。

consumers.py:相当于django的视图,也就是说所有的websocket路由过来的执行的函数都在consumers.py类似于django的视图views.py

routing.py:是websocket中的url和执行函数的对应关系。相当于django的urls.py,根据映射关系,当websocket的请求进来的时候,根据用户的请求来触发我们的consumers.py里的方法。

3.安装redis

redis 安装配置默认密码

yum install -y redis

[root@localhost ~]# vim /etc/redis.conf 开启远程

bind 0.0.0.0

protected-mode no

redis-cli -h 192.168.1.20 -p 6379

4.接着配置settings.py 最底部加上这条。

CHANNEL_LAYERS = {

'default': {

'BACKEND': 'channels_redis.core.RedisChannelLayer',

'CONFIG': {

"hosts": [('192.168.1.20', 6379)],

},

},

}

ASGI_APPLICATION = "MyWeb.routing.application"

接着简单的写一下,routing.py 里面

from channels.routing import ProtocolTypeRouter

application = ProtocolTypeRouter({

# Empty for now (http->django views is added by default)

})

进入django shell 测试是否能连接到数据库

(venv) C:\Users\LyShark\PycharmProjects\MyProject>manage.py shell

Python 3.7.4 (tags/v3.7.4:e09359112e, Jul 8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license" for more information.

(InteractiveConsole)

>>> import channels.layers

>>> channel_layer = channels.layers.get_channel_layer()

>>> from asgiref.sync import async_to_sync

>>> async_to_sync(channel_layer.send)('test_channel', {'type': 'hello'})

>>> async_to_sync(channel_layer.receive)('test_channel')

{'type': 'hello'}

>>>

以上是 django使用channels实现通信的示例 的全部内容, 来源链接: utcz.com/z/327827.html

回到顶部