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- // Copyright 2018 Google LLC
- //
- // 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 proxy
-
- import (
- "log"
- "net/http"
- )
-
- // Useful things for when we need to figure out what's actually going on under the hood.
-
- type debugTransport struct {
- prefix string
- t *http.Transport
- }
-
- func (d debugTransport) RoundTrip(req *http.Request) (*http.Response, error) {
- log.Printf("proxy %s: %s %s", d.prefix, req.Method, req.URL)
- logHeaders(req.Header)
- res, err := d.t.RoundTrip(req)
- if err != nil {
- log.Printf("proxy %s: error %v", d.prefix, err)
- } else {
- log.Printf("proxy %s: %s", d.prefix, res.Status)
- log.Printf("Uncompressed = %v", res.Uncompressed)
- log.Printf("ContentLength = %d", res.ContentLength)
- logHeaders(res.Header)
- log.Printf("Trailers:")
- logHeaders(res.Trailer)
- }
- return res, err
- }
-
- func logHeaders(hs http.Header) {
- for k, v := range hs {
- log.Printf(" %s: %s", k, v)
- }
- }
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