DRF跨域問題

1、安裝模塊

 pip install django-cors-headers

django-cors-headers 使用說明：https://github.com/ottoyiu/django-cors-headers

2、添加到INSTALL_APPS中

INSTALLED_APPS = (
    ...
    'coreschema',
 ... )

3、添加中間件

下面添加中間件的說明：

CorsMiddleware should be placed as high as possible, especially before any middleware that can generate responses such as Django's CommonMiddleware or Whitenoise's WhiteNoiseMiddleware. If it is not before, it will not be able to add the CORS headers to these responses.

Also if you are using CORS_REPLACE_HTTPS_REFERER it should be placed before Django's CsrfViewMiddleware (see more below).

意思就是 要放的儘量靠前，必須在CsrfViewMiddleware以前。咱們直接放在第一個位置就行了

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

4、設置爲True

CORS_ORIGIN_ALLOW_ALL = True