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minio/cmd/logger/audit.go

104 lines
2.9 KiB

/*
* MinIO Cloud Storage, (C) 2018 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 logger
import (
"net/http"
"time"
"github.com/gorilla/mux"
"github.com/minio/minio/cmd/logger/message/audit"
)
// ResponseWriter - is a wrapper to trap the http response status code.
type ResponseWriter struct {
http.ResponseWriter
statusCode int
startTime time.Time
timeToFirstByte time.Duration
}
// NewResponseWriter - returns a wrapped response writer to trap
// http status codes for auditiing purposes.
func NewResponseWriter(w http.ResponseWriter) *ResponseWriter {
return &ResponseWriter{
ResponseWriter: w,
statusCode: http.StatusOK,
startTime: time.Now().UTC(),
}
}
func (lrw *ResponseWriter) Write(p []byte) (int, error) {
n, err := lrw.ResponseWriter.Write(p)
if err != nil {
return n, err
}
if lrw.timeToFirstByte == 0 {
lrw.timeToFirstByte = time.Now().UTC().Sub(lrw.startTime)
}
return n, err
}
// WriteHeader - writes http status code
func (lrw *ResponseWriter) WriteHeader(code int) {
lrw.statusCode = code
lrw.ResponseWriter.WriteHeader(code)
}
// Flush - Calls the underlying Flush.
func (lrw *ResponseWriter) Flush() {
lrw.ResponseWriter.(http.Flusher).Flush()
}
// AuditTargets is the list of enabled audit loggers
var AuditTargets = []Target{}
// AddAuditTarget adds a new audit logger target to the
// list of enabled loggers
func AddAuditTarget(t Target) {
AuditTargets = append(AuditTargets, t)
}
// AuditLog - logs audit logs to all audit targets.
func AuditLog(w http.ResponseWriter, r *http.Request, api string, reqClaims map[string]interface{}) {
var statusCode int
var timeToResponse time.Duration
var timeToFirstByte time.Duration
lrw, ok := w.(*ResponseWriter)
if ok {
statusCode = lrw.statusCode
timeToResponse = time.Now().UTC().Sub(lrw.startTime)
timeToFirstByte = lrw.timeToFirstByte
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
// Send audit logs only to http targets.
for _, t := range AuditTargets {
entry := audit.ToEntry(w, r, reqClaims, globalDeploymentID)
entry.API.Name = api
entry.API.Bucket = bucket
entry.API.Object = object
entry.API.Status = http.StatusText(statusCode)
entry.API.StatusCode = statusCode
entry.API.TimeToFirstByte = timeToFirstByte.String()
entry.API.TimeToResponse = timeToResponse.String()
_ = t.Send(entry)
}
}