[ The same-origin policy - Cross-domain problem ]
One 、django The default is the same origin policy , So the front and back stage are separated , visit django There will be CORS Error reporting for cross domain problems
Two 、 What is cross-domain
'''
i）ip Different ： Taiwan before and after （ Two servers ） Not running on a single host
ii）port Different ： Taiwan before and after （ Two servers ） It's independent of each other , Running on different ports
iii） Different agreements ：http And https It is also a cross domain problem
notes ： The three meet one , It's cross domain
'''
3、 ... and 、 To solve the cross domain
'''
i） camouflage ： Disguise the foreground request as a request from the background
ii） The background actively allows cross domain ： The background configuration allows cross domain （ Process... In the response header ）
'''
Four 、Django To solve the cross domain
i） Install the module ：
'''
pip install django-cors-headers
'''
ii） register app：
'''
INSTALLED_APPS = [
...
'corsheaders'
]
'''
iii） Add Middleware
'''
MIDDLEWARE = [
...
'corsheaders.middleware.CorsMiddleware'
]
'''
iv） Allow cross domain sources
'''
CORS_ORIGIN_ALLOW_ALL = True
'''
Be accomplished ！！！！
