Function checkIsHttpToken

lib/_http_common.js:243–257

* Verifies that the given val is a valid HTTP token * per the rules defined in RFC 7230 * See https://tools.ietf.org/html/rfc7230#section-3.2.6 * @param {string} val * @returns {boolean}

(val)

 * @returns {boolean}
 */
function checkIsHttpToken(val) {
  if (val.length >= 10) {
    return tokenRegExp.test(val);
  }

  if (val.length === 0) return false;

  // Use lookup table for short strings, regex for longer ones
  for (let i = 0; i < val.length; i++) {
    if (!validTokenChars[val.charCodeAt(i)]) {
      return false;
    }
  }
  return true;
}

// Strict header value regex per RFC 7230 (original/default behavior):
// field-value = *( field-content / obs-fold )