URL encode in bash

[Peng Yu]

Hi,

https://gist.github.com/cdown/1163649

I see a bash program is shown above for URL encode. But I am not sure
if it works correctly.

For example, α should be %CE%B1. But the following command shows differently.

$ printf '%%%02X\n' "'α"
%3B1

What is the correct way to do URL encode in bash?

-- 
Regards,
Peng