add glog for s3 handlers

weed/s3api/s3api_object_handlers_postpolicy.go

@@ -5,6 +5,7 @@ import (
 	"encoding/base64"
 	"errors"
 	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/s3api/policy"
 	"github.com/chrislusf/seaweedfs/weed/s3api/s3err"
 	"github.com/dustin/go-humanize"
@@ -24,6 +25,8 @@ func (s3a *S3ApiServer) PostPolicyBucketHandler(w http.ResponseWriter, r *http.R
 
 	bucket := mux.Vars(r)["bucket"]
 
+	glog.V(3).Infof("PostPolicyBucketHandler %s", bucket)
+
 	reader, err := r.MultipartReader()
 	if err != nil {
 		s3err.WriteErrorResponse(w, s3err.ErrMalformedPOSTRequest, r)