Python requests 模块，models() 实例源码

def forward_request(self, method, path, data, headers):
        """ This interceptor method is called by the proxy when receiving a new request
            (*before* forwarding the request to the backend service). It receives details
            of the incoming request, and returns either of the following results:

            * True if the request should be forwarded to the backend service as-is (default).
            * An integer (e.g., 200) status code to return directly to the client without
              calling the backend service.
            * An instance of requests.models.Response to return directly to the client without
              calling the backend service.
            * An instance of requests.models.Request which represents a new/modified request
              that will be forwarded to the backend service.
            * Any other value, in which case a 503 Bad Gateway is returned to the client
              without calling the backend service.
        """
        return True

def judge_response():
    import requests
    from requests.models import Response
    body = requests.get("http://www.126.com")
    if isinstance(body, Response):
        print "yes"
    else:
        print "no"

def return_response(self, method, path, data, headers, response):
        """ This interceptor method is called by the proxy when returning a response
            (*after* having forwarded the request and received a response from the backend
            service). It receives details of the incoming request as well as the response
            from the backend service, and returns either of the following results:

            * An instance of requests.models.Response to return to the client instead of the
              actual response returned from the backend service.
            * Any other value, in which case the response from the backend service is
              returned to the client.
        """
        return None