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我正在尝试使用 Django 中的 websockets 示例，https://github.com/jacobian/channels-example，因为我打算将它用于我的生产应用程序，它也托管在 Heroku 中，并在那里使用 Whitenoise。因此，在克隆了上述示例之后，我使用 Whitenoise 进行了一些调整，但现在通过任何浏览器（chrome 或 FF）首次访问应用程序时，静态文件不会加载，当我再次刷新时它会加载静态文件，并且在第三次加载时，它再次熄灭，依此类推。这是我的设置文件：

import os
import random
import string
import dj_database_url

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))

SECRET_KEY = os.environ.get("SECRET_KEY", "".join(random.choice(string.printable) for i in range(40)))
DEBUG = os.environ.get("DEBUG", False)

# Application definition
INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'channels',
    'chat',
)

MIDDLEWARE_CLASSES = (

    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',

)

ROOT_URLCONF = 'chat.urls'

TEMPLATES = (
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
            'debug': DEBUG,
        },
    },
)

# Database
# https://docs.djangoproject.com/en/1.9/ref/settings/#databases

DATABASES = {
    'default': dj_database_url.config(default="postgres:///channels-example", conn_max_age=500)
}

AUTH_PASSWORD_VALIDATORS = (
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
)

# Internationalization
# https://docs.djangoproject.com/en/1.9/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True

# Honor the 'X-Forwarded-Proto' header for request.is_secure()
SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

# Allow all host headers
ALLOWED_HOSTS = ['*']

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.9/howto/static-files/

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles')
STATIC_URL = '/static/'

# Extra places for collectstatic to find static files.
STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'static'),
]

# Channel settings
CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "asgi_redis.RedisChannelLayer",
        "CONFIG": {
            "hosts": [os.environ.get('REDIS_URL', 'redis://localhost:6379')],
        },
        "ROUTING": "chat.routing.channel_routing",
    },
}

# Logging
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'console': {
            'class': 'logging.StreamHandler',
        },
    },
    'loggers': {
        'django': {
            'handlers': ['console'],
            'propagate': True,
            'level': 'INFO'
        },
        'chat': {
            'handlers': ['console'],
            'propagate': False,
            'level': 'DEBUG',
        },
    },
}

STATICFILES_STORAGE = 'whitenoise.django.GzipManifestStaticFilesStorage'

这是我对 routing.py 进行更改的另一个文件：

from channels.staticfiles import StaticFilesConsumer
from . import consumers

channel_routing = {
    # This makes Django serve static files from settings.STATIC_URL, similar
    # to django.views.static.serve. This isn't ideal (not exactly production
    # quality) but it works for a minimal example.
    # 'http.request': StaticFilesConsumer(),

    # Wire up websocket channels to our consumers:
    'websocket.connect': consumers.ws_connect,
    'websocket.receive': consumers.ws_receive,
    'websocket.disconnect': consumers.ws_disconnect,
}

过程文件是：

web: daphne chat.asgi:channel_layer --port $PORT --bind 0.0.0.0 -v2
worker: python manage.py runworker -v2

我现在还没有在 Heroku 上尝试过，只是在 localhost 上我观察到了这种行为，所以甚至没有将解决方案与原始应用程序集成。我使用 heroku local 在本地运行应用程序。

我究竟做错了什么？Procfile 生产中提到的过程是否已在 Heroku 上准备好？

谢谢

4

1 回答 1

0

Try upgrading your Django channels to 1.0.3 and whitenoise 3.3.0 the example you mentioned Is using an outdated version and some bug fixes where added to allow Daphne to serve static content with whitenoise. Alternatively you can just leverage on s3 bucket to serve your static content which is the preferred approach to serve static content with Django.

https://github.com/django/channels/issues/87

于 2017-02-23T12:17:29.603 回答