mirror of
https://github.com/minio/minio.git
synced 2025-11-10 05:59:43 -05:00
log: Store http request/responses in a log file (#4804)
When MINIO_TRACE_DIR is provided, create a new log file and store all HTTP requests + responses data, body are excluded to reduce memory consumption. MINIO_HTTP_TRACE=1 enables logging. Use non mem consuming http req/resp recorders, the maximum is about 32k per request. This logs to STDOUT, body logging is disabled for PutObject PutObjectPart GetObject.
This commit is contained in:
A. Elleuch
deekoder
201
pkg/handlers/http-tracer.go
Normal file
201
pkg/handlers/http-tracer.go
Normal file
@@ -0,0 +1,201 @@
|
||||
/*
|
||||
* 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())
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user