graphqlview.py 文件源码

def process_preflight(self, request):
        """ Preflight request support for apollo-client
        https://www.w3.org/TR/cors/#resource-preflight-requests """
        origin = request.headers.get('Origin', '')
        method = request.headers.get('Access-Control-Request-Method', '').upper()

        if method and method in self.methods:
            return HTTPResponse(
                status=200,
                headers={
                    'Access-Control-Allow-Origin': origin,
                    'Access-Control-Allow-Methods': ', '.join(self.methods),
                    'Access-Control-Max-Age': str(self.max_age),
                }
            )
        else:
            return HTTPResponse(
                status=400,
            )