/*
* 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 cmd
import (
"bytes"
"io"
"io/ioutil"
"net"
"net/http"
"reflect"
"runtime"
"strconv"
"strings"
"time"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/handlers"
trace "github.com/minio/minio/pkg/trace"
)
// 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
// request headers
headers http.Header
// total bytes read including header size
bytesRead int
}
func (r *recordRequest) Read(p []byte) (n int, err error) {
n, err = r.Reader.Read(p)
r.bytesRead += n
if r.logBody {
r.buf.Write(p[:n])
}
if err != nil {
return n, err
}
return n, err
}
func (r *recordRequest) Size() int {
sz := r.bytesRead
for k, v := range r.headers {
sz += len(k) + len(v)
}
return sz
}
// Return the bytes that were recorded.
func (r *recordRequest) Data() []byte {
// If body logging is enabled then we return the actual body
if r.logBody {
return r.buf.Bytes()
}
// ... otherwise we return <BODY> placeholder
return logger.BodyPlaceHolder
}
// getOpName sanitizes the operation name for mc
func getOpName(name string) (op string) {
op = strings.TrimPrefix(name, "github.com/minio/minio/cmd.")
op = strings.TrimSuffix(op, "Handler-fm")
op = strings.Replace(op, "objectAPIHandlers", "s3", 1)
op = strings.Replace(op, "webAPIHandlers", "webui", 1)
op = strings.Replace(op, "adminAPIHandlers", "admin", 1)
op = strings.Replace(op, "(*storageRESTServer)", "internal", 1)
op = strings.Replace(op, "(*peerRESTServer)", "internal", 1)
op = strings.Replace(op, "(*lockRESTServer)", "internal", 1)
op = strings.Replace(op, "(*stsAPIHandlers)", "sts", 1)
op = strings.Replace(op, "LivenessCheckHandler", "healthcheck", 1)
op = strings.Replace(op, "ReadinessCheckHandler", "healthcheck", 1)
op = strings.Replace(op, "-fm", "", 1)
return op
}
// Trace gets trace of http request
func Trace(f http.HandlerFunc, logBody bool, w http.ResponseWriter, r *http.Request) trace.Info {
name := getOpName(runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name())
// Setup a http request body recorder
reqHeaders := r.Header.Clone()
reqHeaders.Set("Host", r.Host)
if len(r.TransferEncoding) == 0 {
reqHeaders.Set("Content-Length", strconv.Itoa(int(r.ContentLength)))
} else {
reqHeaders.Set("Transfer-Encoding", strings.Join(r.TransferEncoding, ","))
}
var reqBodyRecorder *recordRequest
t := trace.Info{FuncName: name}
reqBodyRecorder = &recordRequest{Reader: r.Body, logBody: logBody, headers: reqHeaders}
r.Body = ioutil.NopCloser(reqBodyRecorder)
t.NodeName = r.Host
if globalIsDistErasure {
t.NodeName = GetLocalPeer(globalEndpoints)
}
// strip port from the host address
if host, _, err := net.SplitHostPort(t.NodeName); err == nil {
t.NodeName = host
}
rq := trace.RequestInfo{
Time: time.Now().UTC(),
Proto: r.Proto,
Method: r.Method,
Path: r.URL.Path,
RawQuery: r.URL.RawQuery,
Client: handlers.GetSourceIP(r),
Headers: reqHeaders,
}
rw := logger.NewResponseWriter(w)
rw.LogErrBody = true
rw.LogAllBody = logBody
// Execute call.
f(rw, r)
rs := trace.ResponseInfo{
Time: time.Now().UTC(),
Headers: rw.Header().Clone(),
StatusCode: rw.StatusCode,
Body: rw.Body(),
}
// Transfer request body
rq.Body = reqBodyRecorder.Data()
if rs.StatusCode == 0 {
rs.StatusCode = http.StatusOK
}
t.ReqInfo = rq
t.RespInfo = rs
t.CallStats = trace.CallStats{
Latency: rs.Time.Sub(rw.StartTime),
InputBytes: reqBodyRecorder.Size(),
OutputBytes: rw.Size(),
TimeToFirstByte: rw.TimeToFirstByte,
}
return t
}