解决前后端跨域问题

1.代码

from django.utils.deprecation import MiddlewareMixin

class CoresMiddleware(MiddlewareMixin):
    def process_response(self, request, response):
        response['Access-Control-Allow-Origin'] = "*"
        response['Access-Control-Allow-Headers'] = "*"
        response['Access-Control-Allow-Methods'] = "*"
        return response

2.注册中间件

注意：
请求头不支持带下划线，要用驼峰；
跨域中间件要放首位（可以试一下）