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)

		return
	}

	file = filepath.ToSlash(file)
	// Reject attempts to traverse parent or absolute paths.
	if hasBadPathComponent(volume) || hasBadPathComponent(file) {
		writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(ErrInvalidResourceName), r.URL)
		return
	}

	var publicKey *rsa.PublicKey

	publicKeyB64 := r.Form.Get("public-key")
	if publicKeyB64 != "" {