base64StringToBase64UrlEncodedString function

String base64StringToBase64UrlEncodedString(String input)

Converts a base64-encoded string to a base64 URL-encoded string.

This function replaces + with -, / with _, and removes = characters from the input string, converting it to a base64 URL-safe format.

• input: The input base64 string to convert.

Returns a String representing the base64 URL-encoded version of the input.

Implementation

String base64StringToBase64UrlEncodedString(String input) {
  return input.replaceAll('+', '-').replaceAll('/', '_').replaceAll('=', '');
}