urlencode

#!/bin/bash

# if you don't have xtr, get it: http://pastebin.com/67H6Us9V
# its fast, its small, its portable, its easy, its free
# but most of all its indispensable.

# urlencode (HTML5 Compliant) standard input

xtr -p % +e "[0-9a-zA-Z]*-_." "s/ /+";