offset, err := strconv.Atoi(r.Form.Get(storageRESTOffset))
	if err != nil {
		s.writeErrorResponse(w, err)
		return
	}
	length, err := strconv.Atoi(r.Form.Get(storageRESTLength))
	if err != nil {
		s.writeErrorResponse(w, err)
		return
	}
	if offset < 0 || length < 0 {
		s.writeErrorResponse(w, errInvalidArgument)
		return
	}
	var verifier *BitrotVerifier

			writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrUnsupportedMetadata), r.URL)
			return
		}

		if isHTTPHeaderSizeTooLarge(r.Header) {
			if ok {
				tc.FuncName = "handler.ValidRequest"
				tc.ResponseRecorder.LogErrBody = true
			}

			defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))

	switch err {
	case errInvalidRange:
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRange), url)
		return
	case errInvalidRangeSource:
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource), url)
		return
	default:
		apiErr := errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, url)
		return
	}
}

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"encoding/json"
	"errors"
	"fmt"
	"log"
	"net/http"
)

func writeErrorResponse(w http.ResponseWriter, err error) {
	w.WriteHeader(http.StatusBadRequest)
	json.NewEncoder(w).Encode(map[string]string{
		"reason": fmt.Sprintf("%v", err),
	})
}

type Resp struct {

		apiErr := getAPIError(ErrBusy)
		switch r.Method {
		case http.MethodHead:
			writeResponse(w, apiErr.HTTPStatusCode, nil, mimeNone)
		case http.MethodGet:
			writeErrorResponse(r.Context(), w, apiErr, r.URL)
		}
		return
	}

	// Verify if KMS is reachable if its configured
	if GlobalKMS != nil {
		ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
		defer cancel()

			allPolicies, err := globalIAMSys.ListPolicies(ctx, "")
			if err != nil {
				adminLogIf(ctx, err)
				writeErrorResponse(ctx, w, exportError(ctx, err, iamFile, ""), r.URL)
				return
			}

			policiesData, err := json.Marshal(allPolicies)
			if err != nil {
				writeErrorResponse(ctx, w, exportError(ctx, err, iamFile, ""), r.URL)
				return
			}

			defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))

			apiErr := errorCodes.ToAPIErr(ErrUnsupportedHostHeader)
			apiErr.Description = fmt.Sprintf("%s: %v", apiErr.Description, err)

			writeErrorResponse(r.Context(), w, apiErr, r.URL)
			return
		}

		bucket, _ := path2BucketObject(resource)

		meta, err := globalBucketMetadataSys.Get(bucket) // check if this bucket exists.

				// header, for all requests where Date header is not
				// present we will reject such clients.
				defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))
				writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(errCode), r.URL)
				atomic.AddUint64(&globalHTTPStats.rejectedRequestsTime, 1)
				return
			}

			w.WriteHeader(499)
		default:
			globalHTTPStats.addRequestsInQueue(-1)
			if contextCanceled(ctx) {
				w.WriteHeader(499)
				return
			}
			// Send a http timeout message
			writeErrorResponse(ctx, w,
				errorCodes.ToAPIErr(ErrTooManyRequests),
				r.URL)

		}
	}
}

func (t *apiConfig) getReplicationOpts() replicationPoolOpts {
	t.mu.RLock()
	defer t.mu.RUnlock()

	writeResponse(w, http.StatusSeeOther, nil, mimeNone)
}

func writeSuccessResponseHeadersOnly(w http.ResponseWriter) {
	writeResponse(w, http.StatusOK, nil, mimeNone)
}

// writeErrorResponse writes error headers
func writeErrorResponse(ctx context.Context, w http.ResponseWriter, err APIError, reqURL *url.URL) {
	switch err.HTTPStatusCode {
	case http.StatusServiceUnavailable, http.StatusTooManyRequests: