Class Base64Variants


  • public final class Base64Variants
    extends Object
    This class is used as a container for commonly used Base64 variants.
    Since:
    3.0.0
    Author:
    Tatu Saloranta
    • Field Detail

      • MIME_NO_LINEFEEDS

        public static final Base64Variant MIME_NO_LINEFEEDS
        Slightly non-standard modification of MIME which does not use linefeeds (max line length set to infinite). Useful when linefeeds wouldn't work well (possibly in attributes), or for minor space savings (save 1 linefeed per 76 data chars, ie. ~1.4% savings).
      • PEM

        public static final Base64Variant PEM
        This variant is the one that predates MIME: it is otherwise identical, except that it mandates shorter line length.
      • MODIFIED_FOR_URL

        public static final Base64Variant MODIFIED_FOR_URL
        This non-standard variant is usually used when encoded data needs to be passed via URLs (such as part of GET request). It differs from the base MIME variant in multiple ways. First, no padding is used: this also means that it generally can not be written in multiple separate but adjacent chunks (which would not be the usual use case in any case). Also, no linefeeds are used (max line length set to infinite). And finally, two characters (plus and slash) that would need quoting in URLs are replaced with more optimal alternatives (hyphen and underscore, respectively).
    • Constructor Detail

      • Base64Variants

        public Base64Variants()
    • Method Detail

      • getDefaultVariant

        public static Base64Variant getDefaultVariant()
        Method used to get the default variant ("MIME") for cases where caller does not explicitly specify the variant