Django配置websocket请求接口

1.settings.py

INSTALLED_APPS = [
    '...',
    'channels',
    '...',
]
ASGI_APPLICATION = 'server.routing.application'
CHANNEL_LAYERS = {
    'default': {
        'BACKEND': 'channels_redis.core.RedisChannelLayer',
        'CONFIG': {
            "hosts": [(os.getenv('REDIS_SERVER_HOST', '127.0.0.1'), int(os.getenv('REDIS_SERVER_PORT', '')))],
        },
    },
}

2.routing.py（settin.py同级）

# -*- coding: utf-8 -*-

from channels.routing import ProtocolTypeRouter, URLRouter

from device.consumers import QueryAuthMiddleware  # websocket中间件
import device.routing  # 路由

application = ProtocolTypeRouter({
    'websocket': QueryAuthMiddleware(
        URLRouter(
            device.routing.websocket_urlpatterns
        )
    )
})

class QueryAuthMiddleware:
    """
    WebSocket 认证中间件
    """
    def __init__(self, inner):
        # Store the ASGI application we were passed
        self.inner = inner

    def __call__(self, scope):
        query = parse.parse_qs(scope["query_string"].decode())
        token = query.get('token', [None])[0]
        device_name = None
        try:
            login_info = json.loads(base64.b64decode(token).decode())
            device_name = login_info['name']
            logger.info('Device {} connect from {} port {}'.format(device_name, scope['client'][0], scope['client'][1]))

            # 验证时间
            gen_time = datetime.strptime(login_info['time'], '%Y%m%d%H%M%S')
            now_time = datetime.now()
            if abs(gen_time - now_time).total_seconds() > 5 * 60:
                raise ValueError('Device {} time validate fail: token time: {}, server time: {}'.format(
                    device_name, gen_time.strftime('%Y-%m-%d %H:%M:%S'), now_time.strftime('%Y-%m-%d %H:%M:%S')))

            # 验证密码
            device = DeviceInfoModel.objects.get(name=device_name)  # 获取到设备
            correct = device.check_password(login_info['password'])  # 检查密码
            if not correct:
                raise ValueError('Device {} password validate fail'.format(device_name))

        except DeviceInfoModel.DoesNotExist:
            logger.info('Device {} can not find in DB'.format(device_name))
            device = None

        except Exception as e:
            logger.error('Connect error {}'.format(e))
            device = None

        finally:
            # Middleware 中必须手动关闭数据库连接
            # http://channels.readthedocs.io/en/latest/topics/authentication.html#custom-authentication
            close_old_connections()

        return self.inner(dict(scope, user=device))

此时，启动方式也应该稍作调整（项目根目录下新建asgi.py文件）

"""
ASGI entrypoint. Configures Django and then runs the application
defined in the ASGI_APPLICATION setting.
"""

import os
import django
from channels.routing import get_default_application

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "server.settings")
django.setup()
application = get_default_application()

客户端示例：

import threading
import time
import json
import tarfile
import base64
import hashlib
import os
import pickle
from io import BytesIO
from datetime import datetime

import websocket

def on_message(ws, message):
    print('on_message')
    msg = json.loads(message)
    print(msg)
    # print(msg['result'])
    # print(pickle.loads(base64.b64decode(msg['content']['2-5b4747af5f627dbcb5eaefeb'])))

def on_error(ws, error):
    print(error)

def on_close(ws):
    print("### closed ###")

def on_open(ws):
    def run(*args):
        # for i in range(1):
        #     tarobj = BytesIO()
        #     tar = tarfile.open(fileobj=tarobj, mode='w:gz')
        #     dir_list = filter(lambda name: os.path.isdir(name) and not name.startswith('.'), os.listdir(os.path.abspath(os.path.dirname('__file__'))))
        #     for dir in dir_list:
        #         tar.add(dir)
        #     tar.close()
        #     tarobj.seek(0)
        with open('D:\\software\\websocket\websocket\\face\\18032811042400\\0.jpg', 'rb') as f:
            base64_data = base64.b64encode(f.read())
            s = base64_data.decode()

        file_obj = {
            'timestamp': datetime.now().timestamp(),
            'image': s
        }

        info = {
            'command': 'TEST',
            'content':  file_obj,
            # 'content':  ['30-5b691d365f627dee73c4b58d-common', '71-5b695edf5f627d762d5d651b'],
        }
        ws.send(json.dumps(info))
        time.sleep(100)
        ws.close()
        print("thread terminating...")
    threading.Thread(target=run).start()

if __name__ == "__main__":

    websocket.enableTrace(True)
    login_info = {
        'name': '',
        'password': hashlib.md5(''.encode('utf8')).hexdigest(),
        'time': datetime.now().strftime('%Y%m%d%H%M%S')
    }

    b64_token = base64.b64encode(json.dumps(login_info).encode()).decode()
    url = "ws://xx.xx.xx.xx:8000/push/device/?token={}".format(b64_token)
    print(login_info)
    print('Connect {}'.format(url))
    ws = websocket.WebSocketApp(url,
                              on_message=on_message,
                              on_error=on_error,
                              on_close=on_close)
    ws.on_open = on_open
    ws.run_forever()

参考：https://channels.readthedocs.io/en/latest/deploying.html