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msgpack-cli

msgpack-cli is command line tool that converts data from JSON to Msgpack and vice versa. Also allows calling RPC methods via msgpack-rpc.

Installation

% go get github.com/jakm/msgpack-cli

Debian packages and Windows binaries are available on project's Releases page.

Usage

msgpack-cli

Usage:
    msgpack-cli encode <input-file> [--out=<output-file>] [--disable-int64-conv]
    msgpack-cli decode <input-file> [--out=<output-file>] [--pp]
    msgpack-cli rpc <host> <port> <method> [<params>|--file=<input-file>] [--pp]
        [--timeout=<timeout>][--disable-int64-conv]
    msgpack-cli -h | --help
    msgpack-cli --version

Commands:
    encode                Encode data from input file to STDOUT
    decode                Decode data from input file to STDOUT
    rpc                   Call RPC method and write result to STDOUT

Options:
    -h --help             Show this help message and exit
    --version             Show version
    --out=<output-file>   Write output data to file instead of STDOUT
    --file=<input-file>   File where parameters or RPC method are read from
    --pp                  Pretty-print - indent output JSON data
    --timeout=<timeout>   Timeout of RPC call [default: 30]
    --disable-int64-conv  Disable the default behaviour such that JSON numbers
                          are converted to float64 or int64 numbers by their
                          meaning, all result numbers will have float64 type


Arguments:
    <input-file>          File where data are read from
    <host>                Server hostname
    <port>                Server port
    <method>              Name of RPC method
    <params>              Parameters of RPC method in JSON format

Examples

Encoding/decoding:

$ cat test.json
{
  "firstName": "John",
  "lastName": "Smith",
  "isAlive": true,
  "age": 25,
  "height_cm": 167.6,
  "address": {
    "streetAddress": "21 2nd Street",
    "city": "New York",
    "state": "NY",
    "postalCode": "10021-3100"
  },
  "phoneNumbers": [
    {
      "type": "home",
      "number": "212 555-1234"
    },
    {
      "type": "office",
      "number": "646 555-4567"
    }
  ],
  "children": [],
  "spouse": null
}
$
$ msgpack-cli encode test.json --out test.bin
$
$ ls -l test.* | awk '{print $9, $5}'
test.bin 242
test.json 429
$
$ msgpack-cli decode test.bin --pp  # pretty-print
{
  "address": {
    "city": "New York",
    "postalCode": "10021-3100",
    "state": "NY",
    "streetAddress": "21 2nd Street"
  },
  "age": 25,
  "children": [],
  "firstName": "John",
  "height_cm": 167.6,
  "isAlive": true,
  "lastName": "Smith",
  "phoneNumbers": [
    {
      "number": "212 555-1234",
      "type": "home"
    },
    {
      "number": "646 555-4567",
      "type": "office"
    }
  ],
  "spouse": null
}

RPC calling:

$ # zero params
$ msgpack-cli rpc localhost 8000 echo
[]
$
$ # single param
$ msgpack-cli rpc localhost 8000 echo 3.14159
[3.14159]
$
$ # multiple params (as json array)
$ msgpack-cli rpc localhost 8000 echo '["abc", "def", "ghi", {"A": 65, "B": 66, "C": 67}]'
["abc","def","ghi",{"A":65,"B":66,"C":67}]