Django 中的 channels django channels

Others 2019-11-29 19:28:09 views: null

django channels

 

django django channels is a module of support websocket.

1. Install

1
pip3 install channels

2. Quick Start 

2.1 Adding configuration settings in

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

2.2 Creating and routing applications websocket

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#!/usr/bin/env python
# -*- coding:utf-8 -*-
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),
    ])
})
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2.3 write processing business logic websocket

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#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer

class ChatConsumer(WebsocketConsumer):

    def websocket_connect(self, message):
        self.accept()

    def websocket_receive(self, message):
        print ( 'message received', message)
        self.send (text_data = 'received')

    def websocket_disconnect(self, message):
        print ( 'the client disconnects')
        Consumer raise Stop ()
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer


class SimpleChatConsumer(WebsocketConsumer):
    def connect(self):
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        self.send(text_data)

        # Disconnect initiative
        # self.close()

    def disconnect(self, code):
        print ( 'To disconnect the client')
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer


CLIENTS = []

class ChatConsumer(WebsocketConsumer):

    def connect(self):
        self.accept()
        CLIENTS.append(self)

    def receive(self, text_data=None, bytes_data=None):
        for item in CLIENTS:
            item.send(text_data)

        # Disconnect initiative
        # self.close()

    def disconnect(self, code):
        CLIENTS.remove(self)
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3. channel layer

 Memory-based channel layer

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels.layers.InMemoryChannelLayer",
    }
}
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from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync


class ChatConsumer(WebsocketConsumer):

    def connect(self):
        async_to_sync(self.channel_layer.group_add)('x1', self.channel_name)
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        async_to_sync(self.channel_layer.group_send)('x1', {
            'type': 'xxx.ooo',
            'message': text_data
        })

    def xxx_ooo(self, event):
        message = event['message']
        self.send(message)

    def disconnect(self, code):
        async_to_sync(self.channel_layer.group_discard)('x1', self.channel_name)
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Based on the channel layer redis

1
pip3 install channels - redis
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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://:[email protected]:6379/0"],
            "symmetric_encryption_keys": [SECRET_KEY],
        },
    },
}
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from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync


class ChatConsumer(WebsocketConsumer):

    def connect(self):
        async_to_sync(self.channel_layer.group_add)('x1', self.channel_name)
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        async_to_sync(self.channel_layer.group_send)('x1', {
            'type': 'xxx.ooo',
            'message': text_data
        })

    def xxx_ooo(self, event):
        message = event['message']
        self.send(message)

    def disconnect(self, code):
        async_to_sync(self.channel_layer.group_discard)('x1', self.channel_name)

 

django django channels is a module of support websocket.

1. Install

1
pip3 install channels

2. Quick Start 

2.1 Adding configuration settings in

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

2.2 Creating and routing applications websocket

Copy the code 
#!/usr/bin/env python
# -*- coding:utf-8 -*-
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),
    ])
})
Copy the code

2.3 write processing business logic websocket

Copy the code 
#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer

class ChatConsumer(WebsocketConsumer):

    def websocket_connect(self, message):
        self.accept()

    def websocket_receive(self, message):
        print ( 'message received', message)
        self.send (text_data = 'received')

    def websocket_disconnect(self, message):
        print ( 'the client disconnects')
        Consumer raise Stop ()
Copy the code
Copy the code 
#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer


class SimpleChatConsumer(WebsocketConsumer):
    def connect(self):
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        self.send(text_data)

        # Disconnect initiative
        # self.close()

    def disconnect(self, code):
        print ( 'To disconnect the client')
Copy the code
Copy the code 
#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumer


CLIENTS = []

class ChatConsumer(WebsocketConsumer):

    def connect(self):
        self.accept()
        CLIENTS.append(self)

    def receive(self, text_data=None, bytes_data=None):
        for item in CLIENTS:
            item.send(text_data)

        # Disconnect initiative
        # self.close()

    def disconnect(self, code):
        CLIENTS.remove(self)
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3. channel layer

 Memory-based channel layer

CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels.layers.InMemoryChannelLayer",
    }
}
Copy the code 
from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync


class ChatConsumer(WebsocketConsumer):

    def connect(self):
        async_to_sync(self.channel_layer.group_add)('x1', self.channel_name)
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        async_to_sync(self.channel_layer.group_send)('x1', {
            'type': 'xxx.ooo',
            'message': text_data
        })

    def xxx_ooo(self, event):
        message = event['message']
        self.send(message)

    def disconnect(self, code):
        async_to_sync(self.channel_layer.group_discard)('x1', self.channel_name)
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基于 redis的channel layer

1
pip3 install channels - redis
Copy the code 
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://:[email protected]:6379/0"],
            "symmetric_encryption_keys": [SECRET_KEY],
        },
    },
}
Copy the code
Copy the code 
from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_sync


class ChatConsumer(WebsocketConsumer):

    def connect(self):
        async_to_sync(self.channel_layer.group_add)('x1', self.channel_name)
        self.accept()

    def receive(self, text_data=None, bytes_data=None):
        async_to_sync(self.channel_layer.group_send)('x1', {
            'type': 'xxx.ooo',
            'message': text_data
        })

    def xxx_ooo(self, event):
        message = event['message']
        self.send(message)

    def disconnect(self, code):
        async_to_sync(self.channel_layer.group_discard)('x1', self.channel_name)

 

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