This little set of tools provides a number of command line utilities for converting to and from CBOR and its diagnostic notation as well as some libraries for this in the Ruby language.

gem install cbor-diag

Specifically, the tools...

• cbor2diag.rb
• cbor2json.rb
• cbor2pretty.rb
• cbor2u8.rb
• cbor2yaml.rb
• cborseq2diag.rb
• cborseq2json.rb
• cborseq2neatjson.rb
• cborseq2yaml.rb
• diag2cbor.rb
• diag2pretty.rb
• json2cbor.rb
• json2pretty.rb
• pretty2cbor.rb
• pretty2diag.rb
• yaml2cbor.rb

...do pretty much what you would expect them to do, given these definitions:

• "cbor" is a single binary CBOR data item.
• "cborseq" is a sequence of zero or more binary CBOR data items.
• "diag" is CBOR's diagnostic notation, with the extensions in RFC 8610 (extended diagnostic notation, EDN) and RFC 8742 (without the outer brackets).
• "json" is JSON.
• "neatjson" is a neater form of JSON.
• "pretty" is the pretty-printed representation of binary CBOR as used by cbor.me.
• "u8" is a sequence of bytes represented as comma-terminated hex numbers, eight per line, suitable for inclusion into a C-language array of u8 bytes.
• "yaml" is YAML.

Output is to stdout, input from stdin or files given as command line arguments. Options:

• json2cbor.rb:
  • -v: be verbose about sizes in bytes.
• cbor2diag.rb, cborseq2diag.rb:
  • -e: output byte strings as embedded CBOR if well-formed as such (e.g., printf 'CBOR' | cbor2diag.rb -et outputs << 'OR' >>).
  • -t: output byte strings that are valid UTF-8 text as such in single quotes (e.g., 'foo' instead of h'666F6F').
  • -u: don't escape beyond-ASCII characters in strings (e.g., "ü" instead of "\u00fc")

These commands have a .rb suffix in their names to avoid conflicts: versions of the same functionality are available under similar names in other CBOR packages, e.g. json2cbor in the CBOR NPM.

• "cbor-pure" is a pure-Ruby implementation of CBOR, with some diagnostic capabilities. It is aided by "half.rb" for 16-bit IEEE 754 floating point numbers (which Ruby strangely doesn't directly support).
• "cbor-diag-parser" is a parser for CBOR's diagnostic notation and the heart of diag2cbor.rb and diag2pretty.rb. (Source is in treetop; compiled .rb also included.)
• "cbor-diagnostic" is a dumper for CBOR's diagnostic notation.
• "cbor-pretty" is a pretty-printer for binary CBOR.

No documentation; use the source, for now (the above command line utilities should show the basic usage).