Passing base64 encoded strings in URL

gistfile1.txt

function base64_url_encode($input) {
 //return strtr(base64_encode($input), '+/=', '-_,');
 return strtr(base64_encode($input), '+/=', '-_~');
}

function base64_url_decode($input) {
 //return base64_decode(strtr($input, '-_,', '+/='));
 return base64_decode(strtr($input, '-_~', '+/='));
}

import base64
def urlsafe_b64encode(s):
  return base64.b64encode(s.encode('utf-8')).decode('utf-8').replace("+", "-").replace("/", "_").replace("=", "~")
  
def urlsafe_b64decode(s):
  return base64.b64decode(s.replace("-", "+").replace("_", "/").replace("~", "=").encode('utf-8')).decode('utf-8')

# @RandalSchwartz tilde is URL-safe. From RFC3986: unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" – kralyk Sep 30 '15 at 10:53
#
# http://stackoverflow.com/questions/1374753/passing-base64-encoded-strings-in-url