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// Copyright 2020 Google LLC 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 transport
import (
"fmt"
"net/http"
"net/http/httputil"
"time"
"github.com/google/go-containerregistry/internal/redact"
"github.com/google/go-containerregistry/pkg/logs"
)
type logTransport struct {
inner http.RoundTripper
}
// NewLogger returns a transport that logs requests and responses to
// github.com/google/go-containerregistry/pkg/logs.Debug.
func NewLogger(inner http.RoundTripper) http.RoundTripper {
return &logTransport{inner}
}
func (t *logTransport) RoundTrip(in *http.Request) (out *http.Response, err error) {
// Inspired by: github.com/motemen/go-loghttp
// We redact token responses and binary blobs in response/request.
omitBody, reason := redact.FromContext(in.Context())
if omitBody {
logs.Debug.Printf("--> %s %s [body redacted: %s]", in.Method, in.URL, reason)
} else {
logs.Debug.Printf("--> %s %s", in.Method, in.URL)
}
// Save these headers so we can redact Authorization.
savedHeaders := in.Header.Clone()
if in.Header != nil && in.Header.Get("authorization") != "" {
in.Header.Set("authorization", "<redacted>")
}
b, err := httputil.DumpRequestOut(in, !omitBody)
if err == nil {
logs.Debug.Println(string(b))
} else {
logs.Debug.Printf("Failed to dump request %s %s: %v", in.Method, in.URL, err)
}
// Restore the non-redacted headers.
in.Header = savedHeaders
start := time.Now()
out, err = t.inner.RoundTrip(in)
duration := time.Since(start)
if err != nil {
logs.Debug.Printf("<-- %v %s %s (%s)", err, in.Method, in.URL, duration)
}
if out != nil {
msg := fmt.Sprintf("<-- %d", out.StatusCode)
if out.Request != nil {
msg = fmt.Sprintf("%s %s", msg, out.Request.URL)
}
msg = fmt.Sprintf("%s (%s)", msg, duration)
if omitBody {
msg = fmt.Sprintf("%s [body redacted: %s]", msg, reason)
}
logs.Debug.Print(msg)
b, err := httputil.DumpResponse(out, !omitBody)
if err == nil {
logs.Debug.Println(string(b))
} else {
logs.Debug.Printf("Failed to dump response %s %s: %v", in.Method, in.URL, err)
}
}
return
}
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