You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
202 lines
5.2 KiB
202 lines
5.2 KiB
7 years ago
|
/*
|
||
|
|
* Minio Cloud Storage, (C) 2017 Minio, Inc.
|
||
|
|
*
|
||
|
|
* 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 handlers
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
"io/ioutil"
|
||
|
|
"net/http"
|
||
|
|
"reflect"
|
||
|
|
"runtime"
|
||
|
|
"strings"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// recordRequest - records the first recLen bytes
|
||
|
|
// of a given io.Reader
|
||
|
|
type recordRequest struct {
|
||
|
|
// Data source to record
|
||
|
|
io.Reader
|
||
|
|
// Response body should be logged
|
||
|
|
logBody bool
|
||
|
|
// Internal recording buffer
|
||
|
|
buf bytes.Buffer
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *recordRequest) Read(p []byte) (n int, err error) {
|
||
|
|
n, err = r.Reader.Read(p)
|
||
|
|
if r.logBody {
|
||
|
|
r.buf.Write(p[:n])
|
||
|
|
}
|
||
|
|
if err != nil {
|
||
|
|
return n, err
|
||
|
|
}
|
||
|
|
return n, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return the bytes that were recorded.
|
||
|
|
func (r *recordRequest) Data() []byte {
|
||
|
|
return r.buf.Bytes()
|
||
|
|
}
|
||
|
|
|
||
|
|
// recordResponseWriter - records the first recLen bytes
|
||
|
|
// of a given http.ResponseWriter
|
||
|
|
type recordResponseWriter struct {
|
||
|
|
// Data source to record
|
||
|
|
http.ResponseWriter
|
||
|
|
// Response body should be logged
|
||
|
|
logBody bool
|
||
|
|
// Internal recording buffer
|
||
|
|
headers bytes.Buffer
|
||
|
|
body bytes.Buffer
|
||
|
|
// The status code of the current HTTP request
|
||
|
|
statusCode int
|
||
|
|
// Indicate if headers are written in the log
|
||
|
|
headersLogged bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write the headers into the given buffer
|
||
|
|
func writeHeaders(w io.Writer, statusCode int, headers http.Header) {
|
||
|
|
fmt.Fprintf(w, "%d %s\n", statusCode, http.StatusText(statusCode))
|
||
|
|
for k, v := range headers {
|
||
|
|
fmt.Fprintf(w, "%s: %s\n", k, v[0])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Record the headers.
|
||
|
|
func (r *recordResponseWriter) WriteHeader(i int) {
|
||
|
|
r.statusCode = i
|
||
|
|
if !r.headersLogged {
|
||
|
|
writeHeaders(&r.headers, i, r.ResponseWriter.Header())
|
||
|
|
r.headersLogged = true
|
||
|
|
}
|
||
|
|
r.ResponseWriter.WriteHeader(i)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (r *recordResponseWriter) Write(p []byte) (n int, err error) {
|
||
|
|
n, err = r.ResponseWriter.Write(p)
|
||
|
|
// We log after calling ResponseWriter.Write() because this latter
|
||
|
|
// proactively prepares headers when WriteHeader is not called yet.
|
||
|
|
if !r.headersLogged {
|
||
|
|
writeHeaders(&r.headers, http.StatusOK, r.ResponseWriter.Header())
|
||
|
|
r.headersLogged = true
|
||
|
|
}
|
||
|
|
if r.statusCode != http.StatusOK && r.statusCode != http.StatusNoContent && r.statusCode != 0 {
|
||
|
|
// We always log error responses.
|
||
|
|
r.body.Write(p)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if r.logBody {
|
||
|
|
r.body.Write(p)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
return n, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calls the underlying Flush.
|
||
|
|
func (r *recordResponseWriter) Flush() {
|
||
|
|
r.ResponseWriter.(http.Flusher).Flush()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return response headers.
|
||
|
|
func (r *recordResponseWriter) Headers() []byte {
|
||
|
|
return r.headers.Bytes()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return response body.
|
||
|
|
func (r *recordResponseWriter) Body() []byte {
|
||
|
|
return r.body.Bytes()
|
||
|
|
}
|
||
|
|
|
||
|
|
// TraceReqHandlerFunc logs request/response headers and body.
|
||
|
|
func TraceReqHandlerFunc(f http.HandlerFunc, output io.Writer, logBody bool) http.HandlerFunc {
|
||
|
|
name := runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
|
||
|
|
name = strings.TrimPrefix(name, "github.com/minio/minio/cmd.")
|
||
|
|
bodyPlaceHolder := []byte("<BODY>")
|
||
|
|
|
||
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
||
|
|
const timeFormat = "2006-01-02 15:04:05 -0700"
|
||
|
|
var reqBodyRecorder *recordRequest
|
||
|
|
|
||
|
|
// Generate short random request ID
|
||
|
|
reqID := fmt.Sprintf("%f", float64(time.Now().UnixNano())/1e10)
|
||
|
|
|
||
|
|
reqBodyRecorder = &recordRequest{Reader: r.Body, logBody: logBody}
|
||
|
|
r.Body = ioutil.NopCloser(reqBodyRecorder)
|
||
|
|
|
||
|
|
// Setup a http response body recorder
|
||
|
|
respBodyRecorder := &recordResponseWriter{ResponseWriter: w, logBody: logBody}
|
||
|
|
|
||
|
|
b := bytes.NewBuffer(nil)
|
||
|
|
fmt.Fprintf(b, "[REQUEST %s] [%s] [%s]\n", name, reqID, time.Now().Format(timeFormat))
|
||
|
|
|
||
|
|
f(respBodyRecorder, r)
|
||
|
|
|
||
|
|
// Build request log and write it to log file
|
||
|
|
fmt.Fprintf(b, "%s %s", r.Method, r.URL.Path)
|
||
|
|
if r.URL.RawQuery != "" {
|
||
|
|
fmt.Fprintf(b, "?%s", r.URL.RawQuery)
|
||
|
|
}
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
|
||
|
|
fmt.Fprintf(b, "Host: %s\n", r.Host)
|
||
|
|
for k, v := range r.Header {
|
||
|
|
fmt.Fprintf(b, "%s: %s\n", k, v[0])
|
||
|
|
}
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
if logBody {
|
||
|
|
bodyContents := reqBodyRecorder.Data()
|
||
|
|
if bodyContents != nil {
|
||
|
|
// If body logging is disabled then we print <BODY> as a placeholder
|
||
|
|
// for the actual body.
|
||
|
|
b.Write(bodyContents)
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
b.Write(bodyPlaceHolder)
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
}
|
||
|
|
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
|
||
|
|
// Build response log and write it to log file
|
||
|
|
fmt.Fprintf(b, "[RESPONSE] [%s] [%s]\n", reqID, time.Now().Format(timeFormat))
|
||
|
|
|
||
|
|
b.Write(respBodyRecorder.Headers())
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
bodyContents := respBodyRecorder.Body()
|
||
|
|
if bodyContents != nil {
|
||
|
|
b.Write(bodyContents)
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
} else {
|
||
|
|
if !logBody {
|
||
|
|
// If there was no error response and body logging is disabled
|
||
|
|
// then we print <BODY> as a placeholder for the actual body.
|
||
|
|
b.Write(bodyPlaceHolder)
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fmt.Fprintf(b, "\n")
|
||
|
|
|
||
|
|
// Write the contents in one shot so that logs don't get interspersed.
|
||
|
|
output.Write(b.Bytes())
|
||
|
|
}
|
||
|
|
}
|