django channels

django channels 是django支持websocket的一个模块。

1. 安装

1	`pip3 install channels`

2. 快速上手

2.1 在settings中添加配置

INSTALLED_APPS = ['django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','channels',
]

ASGI_APPLICATION = "django_channels_demo.routing.application"

2.2 创建websocket应用和路由

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.routing import ProtocolTypeRouter, URLRouter
from django.conf.urls import url
from chat import consumersapplication = ProtocolTypeRouter({'websocket': URLRouter([url(r'^chat/$', consumers.ChatConsumer),])
})

2.3 编写处理websocket逻辑业务

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumerclass ChatConsumer(WebsocketConsumer):def websocket_connect(self, message):self.accept()def websocket_receive(self, message):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()

示例二

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumerclass SimpleChatConsumer(WebsocketConsumer):def connect(self):self.accept()def receive(self, text_data=None, bytes_data=None):self.send(text_data)# 主动断开连接# self.close()def disconnect(self, code):print('客户端要断开了')

示例三

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from channels.generic.websocket import WebsocketConsumer
from channels.exceptions import StopConsumerCLIENTS = []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)# 主动断开连接# self.close()def disconnect(self, code):CLIENTS.remove(self)

3. channel layer

基于内存的channel layer

配置

CHANNEL_LAYERS = {"default": {"BACKEND": "channels.layers.InMemoryChannelLayer",}
}

配置

from channels.generic.websocket import WebsocketConsumer
from asgiref.sync import async_to_syncclass 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)

业务处理

基于 redis的channel layer

1	`pip3 install channels-redis`

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
from asgiref.sync import async_to_syncclass 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 channels相关推荐

Django Channels 入门指南
http://www.oschina.NET/translate/in_deep_with_django_channels_the_future_of_real_time_apps_in_django ...
django channels
一直都是用HTTP请求糊里糊涂的实现了一次请求,一次响应.最近尝试用Django这种框架实现websocket,用的是Django channels,结合官网给的例子,实现了日志动态展示到页面.源码地 ...
Django channels摄像头实时视频传输
Django channels摄像头实时视频传输(视屏能传别的当然也能传拉) 前言不想看我瞎扯可以直接跳到这服务端步骤解释发送端接收端运行前言 (网上绝大多数博客都是发送端或者接收端同 ...
Python+Django+channels实现websocket
Python+Django+channels实现websocket 前言公司需要实现一个长连接,用的Python的Django框架.研究了很长时间,发现Django+channels可以实现webs ...
Django Channels配置
channels 4.0之后默认不带Daphne服务器了.解决方案可以有两种: 1.指定channels的版本为3.x: 2.安装时使用pip3 install -U channels["d ...
Django Channels 原理
Django Channels 是一个为 Django 提供异步扩展的库,通常主要用来提供 WebSocket 支持和后台任务. 原理它的原理是将 Django 分为 2 种进程类型: 一个用于处理 ...
基于Django channels 与 YOLO v8 搭建＜实时跟踪与统计系统＞
文章大纲 0. 简介系统Demo 前序文章 1. 系统架构:基于分层结构.组件解耦的<实时跟踪与统计系统> 2. YOLOv8 3. 目标跟踪与计数:SORT ( Simple Onli ...
Python+Django+Channels之Consumers（用户）
Consumers 因为建立Channels最底层的解释接口是ASGI,被用来连接复杂应用的操作接口当然你也可以忽略consumers而使用其他Channels部分,像routing,session ...
django channels socket通信实现
我们知道python有socket包可以直接实现socket通信. 但在使用django时,不太适用于socket的方式与前端交互,对此django有channels来很好的支持socket通信.参考 ...

django channels

1. 安装

2. 快速上手

3. channel layer

django channels相关推荐

最新文章

热门文章