Base64Url

Standalone URL safe base64-compatible codec.

Usage

URL-Safe base64 encoding:

base64url:encode(<<255,127,254,252>>).
<<"_3_-_A">>
base64url:decode(<<"_3_-_A">>).
<<255,127,254,252>>

Vanilla base64 encoding:

base64:encode(<<255,127,254,252>>).
<<"/3/+/A==">>

Some systems in the wild use base64 URL encoding, but keep the padding for MIME compatibility (base64 Content-Transfer-Encoding). To interact with such systems, use:

base64url:encode_mime(<<255,127,254,252>>).
<<"_3_-_A==">>
base64url:decode(<<"_3_-_A==">>).
<<255,127,254,252>>

Thanks

To authors of this and this.

License

Copyright (c) 2013 Vladimir Dronnikov dronnikov@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.