Class: Base64UrlCoder

• Inheritance
• Description
• Related information
• Class protocol
  • initialization
• Examples

Inheritance:

   Object
   |
   +--Visitor
      |
      +--AspectVisitor
         |
         +--ObjectCoder
            |
            +--BaseNCoder
               |
               +--Base64Coder
                  |
                  +--Base64UrlCoder

Package:

stx:libbasic2

Category:

System-Storage

Version:

rev: 1.1 date: 2018/09/30 13:55:46

user: cg

file: Base64UrlCoder.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Author:

Claus Gittinger

Description:

A variant of base64 encoding which generates url- and filename save encodings.
Same as Base64 except that instead of plus and slash, minus and underline are generated.

The main entry point API is
    Base64UrlCoder encode:aStringOrBytes
and
    Base64UrlCoder decode:aString

If the decoder should return a string, use
    Base64UrlCoder decodeAsString:aString.



[instance variables:]

[class variables:]
    Base64UrlMapping         String   Mapping from bytes (with 6 valid bits)
                                      to Base64Url characters
    Base64UrlReverseMapping  Array    Mapping from Base64Url characters to 6-bit-Bytes

Related information:

    RFC
    [ttps]

Class protocol:

 initializeMappings

initialize class variables

usage example(s):

Base64UrlMapping := nil. self initializeMappings

 mapping

 reverseMapping

Examples:

   (Base64Coder encode:#[0 0 16r3F]) = 'AAA/'

   (Base64Coder decode:'AAA/') = #[0 0 63]

   (Base64UrlCoder encode:#[0 0 16r3F]) = 'AAA_'

   (Base64UrlCoder decode:'AAA_') = #[0 0 63]