/* Copyright (c) 2016 VMware, Inc. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package registry import ( "net/http" "github.com/vmware/harbor/utils/log" ) // RequestModifier modifies request type RequestModifier interface { ModifyRequest(*http.Request) error } // HeaderModifier adds headers to request type HeaderModifier struct { headers map[string]string } // NewHeaderModifier ... func NewHeaderModifier(headers map[string]string) *HeaderModifier { return &HeaderModifier{ headers: headers, } } // ModifyRequest adds headers to the request func (h *HeaderModifier) ModifyRequest(req *http.Request) error { for key, value := range h.headers { req.Header.Add(key, value) } return nil } // Transport holds information about base transport and modifiers type Transport struct { transport http.RoundTripper modifiers []RequestModifier } // NewTransport ... func NewTransport(transport http.RoundTripper, modifiers []RequestModifier) *Transport { return &Transport{ transport: transport, modifiers: modifiers, } } // RoundTrip ... func (t *Transport) RoundTrip(req *http.Request) (*http.Response, error) { for _, modifier := range t.modifiers { if err := modifier.ModifyRequest(req); err != nil { return nil, err } } resp, err := t.transport.RoundTrip(req) if err != nil { return nil, err } log.Debugf("%d | %s %s", resp.StatusCode, req.Method, req.URL.String()) return resp, err }