MessagePack

MessagePack implementation in Crystal. It supports Packing and Unpacking from a string or an IO, Mappings, to_msgpack-from_msgpack methods.

Installation

Add this to your application's shard.yml:

dependencies:
  msgpack:
    github: benoist/msgpack-crystal

Usage

require "msgpack"

class Location
  MessagePack.mapping({
    lat: Float64,
    lng: Float64,
  })
end

class House
  MessagePack.mapping({
    address:  String,
    location: {type: Location, nilable: true},
  })
end

house = House.from_msgpack({"address" => "Road12", "location" => {"lat" => 12.3, "lng" => 34.5}}.to_msgpack)
p house # <House:0x1b06de0 @address="Road12", @location=#<Location:0x1b06dc0 @lat=12.3, @lng=34.5>>

house.address = "Something"
house = House.from_msgpack(house.to_msgpack)
p house # #<House:0x13f0d80 @address="Something", @location=#<Location:0x13f0d60 @lat=12.3, @lng=34.5>>

house = House.from_msgpack({"address" => "Crystal Road 1234"}.to_msgpack)
p house # <House:0x1b06d80 @address="Crystal Road 1234", @location=nil>

More Examples

(examples)

Copyright

Copyright 2015 Benoist Claassen

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.