Django后端允许跨域

安装django-cors-headers
通过pip进行安装：

pip install django-cors-headers

Django项目settings设置
在安装完成后需要进行一些settings的设置：

INSTALLED_APPS = [
    ...
    'corsheaders',
    ...
 ] 
 
# 添加中间件
MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',# 默认
    'django.contrib.sessions.middleware.SessionMiddleware', # 默认
 
    'corsheaders.middleware.CorsMiddleware',# 默认
    # 注意顺序，即在上一个的下面
    'django.middleware.common.CommonMiddleware', # 新增 ✔
 
    'django.middleware.csrf.CsrfViewMiddleware',# 默认
    'django.contrib.auth.middleware.AuthenticationMiddleware',# 默认
    'django.contrib.messages.middleware.MessageMiddleware', # 默认
    'django.middleware.clickjacking.XFrameOptionsMiddleware',# 默认
    'django.middleware.common.CommonMiddleware',# 默认
]
 
# 跨域增加忽略
CORS_ALLOW_CREDENTIALS = True
CORS_ORIGIN_ALLOW_ALL = True
CORS_ORIGIN_WHITELIST = (
    '*'
)
CORS_ALLOW_METHODS = (
    'DELETE',
    'GET',
    'OPTIONS',
    'PATCH',
    'POST',
    'PUT',
    'VIEW',
)
CORS_ALLOW_HEADERS = (
    'XMLHttpRequest',
    'X_FILENAME',
    'accept-encoding',
    'authorization',
    'content-type',
    'dnt',
    'origin',
    'user-agent',
    'x-csrftoken',
    'x-requested-with',
)