No 'Access-Control-Allow-Origin' Django

Access to XMLHttpRequest at 'http://127.0.0.1:8000/add' from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Django框架Restangular发送API请求，跨源资源共享的问题。

解决方法：

pip install django-cors-headers

INSTALLED_APPS = (

...

'corsheaders',   

...

)

MIDDLEWARE_CLASSES

= (

...   

'corsheaders.middleware.CorsMiddleware',

'django.middleware.common.CommonMiddleware',

...

)

CORS_ORIGIN_ALLOW_ALL = True  

注意 

'corsheaders.middleware.CorsMiddleware',  需要在'django.middleware.common.CommonMiddleware',前面。

参考：

https://github.com/ottoyiu/django-cors-headers

https://www.cnblogs.com/allan-king/p/7094954.html