wsgi.py 文件源码

def __call__(self, request):
        """WSGI method that controls (de)serialization and method dispatch."""

        LOG.info("%(method)s %(url)s" % {"method": request.method,
                                              "url": request.url})
        if self.support_api_request_version:
            # Set the version of the API requested based on the header
            try:
                request.set_api_version_request()
            except exception.InvalidAPIVersionString as e:
                return Fault(webob.exc.HTTPBadRequest(
                    explanation=six.text_type(e)))
            except exception.InvalidGlobalAPIVersion as e:
                return Fault(webob.exc.HTTPNotAcceptable(
                    explanation=six.text_type(e)))

        # Identify the action, its arguments, and the requested
        # content type
        action_args = self.get_action_args(request.environ)
        action = action_args.pop('action', None)
        content_type, body = self.get_body(request)
        accept = request.best_match_content_type()

        # NOTE(Vek): Splitting the function up this way allows for
        #            auditing by external tools that wrap the existing
        #            function.  If we try to audit __call__(), we can
        #            run into troubles due to the @webob.dec.wsgify()
        #            decorator.
        return self._process_stack(request, action, action_args,
                                   content_type, body, accept)