Django 返回 "GET /static/css/style.css HTTP/1.1" 304 0

Question

好的，我的

Index.html 文件内容是

<!DOCTYPE html>
<html>
    <head>
        <title>Kodeworms</title>
        <link rel="stylesheet"  href="{{ STATIC_URL }}css/style.css" />
    </head>
    <body class="logged-out">
    </body>
</html>

style.css 文件内容是

.logged-out {
    background-image: href=("{{ STATIC_URL }}img/landing.jpg") no-repeat center 30px;
    background-size: 90%;
}

现在我的 index.html 文件放在 *项目名称/项目名称/templates* 这个文件夹里，而我的 style.css 文件放在 *项目名称/assets/css* 这个文件夹里，图片则放在 *项目名称/assets/img* 这个文件夹里。

我的 settings.py 文件内容是

# Django settings for BE.
import os

import dj_database_url

here = lambda * x: os.path.join(os.path.abspath(os.path.dirname(__file__)), *x)

PROJECT_ROOT = here("..")
root = lambda * x: os.path.join(os.path.abspath(PROJECT_ROOT), *x)

DEBUG = True
TEMPLATE_DEBUG = DEBUG

ADMINS = (
    # ('Your Name', 'your_email@example.com'),
)

MANAGERS = ADMINS

DATABASES = {
    'default': dj_database_url.config()
}

SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
# Hosts/domain names that are valid for this site; required if DEBUG is False
# See https://docs.djangoproject.com/en/1.5/ref/settings/#allowed-hosts
ALLOWED_HOSTS = ['http://serene-schubland-8864.herokuapp.com']

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
# although not all choices may be available on all operating systems.
# In a Windows environment this must be set to your system time zone.
TIME_ZONE = 'Asia/Calcutta'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html
LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True

# If you set this to False, Django will not use timezone-aware datetimes.
USE_TZ = True

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/var/www/example.com/media/"
MEDIA_ROOT = root("..","..", "uploads")

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://example.com/media/", "http://media.example.com/"
MEDIA_URL = ''

# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/var/www/example.com/static/"
STATIC_ROOT = root("..","..", "static" )

# URL prefix for static files.
# Example: "http://example.com/static/", "http://static.example.com/"
STATIC_URL = '/static/'

# Additional locations of static files
STATICFILES_DIRS = (
    root("..","assets"),
)

# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
#    'django.contrib.staticfiles.finders.DefaultStorageFinder',
)

# Make this unique, and don't share it with anybody.
SECRET_KEY = 'j%ox@teo++vyzqfjfr@4trs&cx&2q52)ss$+ds*u=(u+!k#b@i'

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
    'django.template.loaders.filesystem.Loader',
    'django.template.loaders.app_directories.Loader',
#     'django.template.loaders.eggs.Loader',
)

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    # Uncomment the next line for simple clickjacking protection:
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
)

ROOT_URLCONF = 'BE.urls'

# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'BE.wsgi.application'

TEMPLATE_DIRS = (
    root("templates"),
)

DJANGO_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.admin',
)

THIRD_PARTY_APPS = (
    'south',
)

LOCAL_APPS = (
    'course',
)

INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS

# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'filters': {
        'require_debug_false': {
            '()': 'django.utils.log.RequireDebugFalse'
        }
    },
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        }
    },
    'loggers': {
        'django.request': {
            'handlers': ['mail_admins'],
            'level': 'ERROR',
            'propagate': True,
        },
    }
}

我该怎么做才能让图片在 CSS 中作为背景加载呢？

django web development css settings.py static files templates assets background image

Django 返回 "GET /static/css/style.css HTTP/1.1" 304 0

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