「Django」rest_framework学习系列-API访问跨域问题

#以中间件方式解决API数据访问跨域问题
1.API下新建文件夹下写PY文件
a.引入内置类继承：

from django.middleware.common import MiddlewareMixin

class CORSMiddleware(MiddlewareMixin):
    def process_response(self,request,response):
        #添加响应头
        #允许你的域名来获取我的数据，'*'也可以单独设置
        response['Access-Control-Allow-Origin'] = '*'

        #允许携带Content-Type请求头
        response['Access-Control-Allow-Headers'] = 'Content-Type'

        #如果PUT或者别的请求形式报错
        response['Access-Control-Allow-Methods'] = 'put,'

        return response

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b.重写继承类：

可以引入，也可以如下重写方法
class MiddlewareMixin:
    def __init__(self, get_response=None):
        self.get_response = get_response
        super().__init__()

    def __call__(self, request):
        response = None
        if hasattr(self, 'process_request'):
            response = self.process_request(request)
            response = response or self.get_response(request)
        if hasattr(self, 'process_response'):
            response = self.process_response(request, response)
        return response

class CORSMiddleware(MiddlewareMixin):
    def process_response(self,request,response):
    #添加响应头
    #允许你的域名来获取我的数据，'*'也可以单独设置
    response['Access-Control-Allow-Origin'] = '*'
    #允许携带Content-Type请求头,如果允许别的请求头加入，写在后面，如k1
    response['Access-Control-Allow-Headers'] = 'Content-Type,k1'

    return response

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2.settings中间件添加

MIDDLEWARE = [
'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',
'middleware.CorsMiddleware.CORSMiddleware'#引入处理跨域的类
]

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