content-range/dist/content-range.esm.js

Content-Range header formatter .

/**
 * Format Content-Range header.
 */
function format(input) {
  var size = input.size != null ? input.size : "*";
  var range = input.start == null && input.end == null ? "*" : input.start + "-" + input.end;
  if (size === "*" && range === "*") return null;
  if (range !== "*" && (input.start == null || input.end == null)) return null;
  return input.unit + " " + range + "/" + size;
}
/**
 * Parse Content-Range header.
 */

function parse(input) {
  var matches = input.match(/^(\w+) ((\d+)-(\d+)|\*)\/(\d+|\*)$/);
  if (!matches) return null;
  var unit = matches[1],
      start = matches[3],
      end = matches[4],
      size = matches[5];
  var range = {
    unit: unit,
    start: start != null ? Number(start) : null,
    end: end != null ? Number(end) : null,
    size: size === "*" ? null : Number(size)
  };
  if (range.start === null && range.end === null && range.size === null) return null;
  return range;
}

export { format, parse };
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