Function validate_scheme

src/proxy/hdrs/URL.cc:134–154

Checks if the (un-well-known) scheme is valid RFC 3986 Section 3.1 These are the valid characters in a scheme: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) return an error if there is another character in the scheme */

   return an error if there is another character in the scheme
*/
bool
validate_scheme(std::string_view scheme)
{
  if (scheme.empty()) {
    return false;
  }

  if (!ParseRules::is_alpha(scheme[0])) {
    return false;
  }

  for (size_t i = 0; i < scheme.size(); ++i) {
    const char &c = scheme[i];

    if (!(ParseRules::is_alnum(c) != 0 || c == '+' || c == '-' || c == '.')) {
      return false;
    }
  }

  return true;
}

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