Django解决跨域俩方案

方案一：一套干掉全部Primary

首先你的pip下载一个第三方库贼厉害的：

pip install corsheaders

然后在项目的setting.py里面引入第三方库,如下：

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'coffee.apps.CoffeeConfig',
    'rest_framework',
    'corsheaders' # 引入第三方库
]

接着配置setting.py：

# 开始：加入了中间件来实现跨域请求

CORS_ALLOW_CREDENTIALS = True
CORS_ORIGIN_ALLOW_ALL = True
CORS_ORIGIN_WHITELIST = (
    '*'
)

CORS_ALLOW_METHODS = (
    'DELETE',
    'GET',
    'OPTIONS',
    'PATCH',
    'POST',
    'PUT',
    'VIEW',
)

CORS_ALLOW_HEADERS = (
    'XMLHttpRequest',
    'X_FILENAME',
    'accept-encoding',
    'authorization',
    'content-type',
    'dnt',
    'origin',
    'user-agent',
    'x-csrftoken',
    'x-requested-with',
    'Pragma',
)

# 结束：加入了中间件来实现跨域请求

再次访问的时候用AJAX带上请求头就可以了，注意哦，是请求头，不是数据哦！

方案二：自力更生，艰苦创业！

首先在APP下面创建一个cors.py，里面写入如下内容

# cors.py
class MiddlewareMixin(object):
    def __init__(self, get_response=None):
        self.get_response = get_response
        super(MiddlewareMixin, self).__init__()

    def __call__(self, request):
        response = None
        if hasattr(self, 'process_request'):
            response = self.process_request(request)
        if not response:
            response = 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
        response['Access-Control-Allow-Origin'] = "*"

        if request.method == "OPTIONS":
            # 允许你携带Content-Type请求头
            response['Access-Control-Allow-Headers'] = "Content-Type"

        # 允许你发送DELETE,PUT
        # response['Access-Control-Allow-Methods'] = "DELETE,PUT"

        return response

然后在setting.py里面配置一下

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    # 'django.middleware.csrf.CsrfResponseMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'coffee.cors.CORSMiddleware', # 引入跨域
]

然后前后端分离的时候带上请求头就可以了！

完美收官！