decode

Try to match input against URL, base64 and JWT encodings, and attempt decoding it.

To install: npm i -g mrotaru/decode

Output of --help below.

decode v.1.0.2

  Apply simple heuristics to a string, detecting various common encodings. The
  attempted decodings are, in order: URL, base64 and JWT. When a string seems
  to match an encoding, it is decoded and the result is passed ('piped') to the
  next encoding processor. The result of the last successfull decoding is printed
  as the output.
  
Functional Options

  All of these are boolean and can be negated by prefixing with "no-"; for
  example, to disable piping, use the '--no-pipe' option.
  
    --match        attempt to match input to an encoding before decoding (default: true)
    --decode       attempt to decode input; when false, only print detected encoding (default: true)
    --pipe         pass the result of each decoding as the input for the following match/decode (default: true)
    --color        use colors (ANSI codes) when printing decoded JWT token; negate to get valid JSON (default: true)
    --bail         exit on first decode failure; if --no-decode, exit on first match failure (default: false)
    --first        exit on first successful decode, or first successful match if --no-decode (default: false)

Other

    --verbose      verbose output - more details on how input is matched against encodings and decoded
    --version      show version number
    --help         show this message
    --dump-config  dump configuration state

Examples

  $ decode Zm9vIGJhcg==
  foo bar
  
  $ decode https%3A%2F%2Flocalhost%3A8080%2Ffoo%2Fbar
  https://localhost:8080/foo/bar
  
  $ decode --verbose Zm9vIGJhcg==
  [ url ] matching "Zm9vIGJhcg=="
  [ url ] did not match
  [ base64 ] matching "Zm9vIGJhcg=="
  [ base64 ] matched
  [ base64 ] decoding "Zm9vIGJhcg=="
  [ base64 ] decoded: "foo bar"
  [ base64 ] passing decoded value to next match/encode (use --no-pipe to avoid this)
  [ jwt ] matching "foo bar"
  [ jwt ] did not match
  foo bar
  
  $ decode --no-decode Zm9vIGJhcg==
  base64
  
  $ decode eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c
  {
    "header": {
      "alg": "HS256",
      "typ": "JWT"
    },
    "payload": {
      "sub": "1234567890",
      "name": "John Doe",
      "iat": 1516239022
    },
    "signature": "SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
  }