if errCode != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(errCode), r.URL)
		return
	}

	if maxUploads < 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidMaxUploads), r.URL)
		return
	}

	if keyMarker != "" {
		// Marker not common with prefix is not implemented.
		if !HasPrefix(keyMarker, prefix) {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)

	if s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	target, err := globalLambdaTargetList.Lookup(r.Form.Get("lambdaArn"))
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	eventData, err := getLambdaEventData(bucket, object, cred, r)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
		return
	}

	zipPath, object, err := splitZipExtensionPath(object)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	opts, err := getOpts(ctx, r, bucket, zipPath)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

			writeHeaders()
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPreconditionFailed), r.URL)
			return true
		}
	}

	etagMatch := opts.PreserveETag != "" && isETagEqual(objInfo.ETag, opts.PreserveETag)
	vidMatch := opts.VersionID != "" && opts.VersionID == objInfo.VersionID
	if etagMatch && vidMatch {
		writeHeaders()
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPreconditionFailed), r.URL)

			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidStorageClass), r.URL)
			return
		}
	}

	encMetadata := map[string]string{}

	if crypto.Requested(r.Header) {
		if crypto.SSECopy.IsRequested(r.Header) {
			writeErrorResponse(ctx, w, toAPIError(ctx, errInvalidEncryptionParameters), r.URL)
			return
		}

		if crypto.SSEC.IsRequested(r.Header) && crypto.S3.IsRequested(r.Header) {

					s3Error = ErrNoSuchKey
				}
			}
		}
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}

	// Get request range.
	rangeHeader := r.Header.Get(xhttp.Range)
	if rangeHeader != "" {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrUnsupportedRangeHeader), r.URL)
		return
	}

	if r.ContentLength <= 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEmptyRequestBody), r.URL)

	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))

			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
			}

				tc.ResponseRecorder.LogErrBody = true
			}

			writeErrorResponse(r.Context(), w, getAPIError(ErrNotImplemented), r.URL)
			return
		}

		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "s3.ValidRequest"
			tc.ResponseRecorder.LogErrBody = true
		}

		writeErrorResponse(r.Context(), w, APIError{
			Code: "BadRequest",