send a binary json message to a udp server in ruby

To send a binary JSON message to a UDP server in Ruby, you can use the socket library and the msgpack gem to encode the JSON message in binary format. Here's an example code snippet:

main.rb
require 'socket'
require 'msgpack'

udp_server_host = '127.0.0.1'
udp_server_port = 3333

# create a UDP socket object
udp_socket = UDPSocket.new

# create a hash object to be encoded into binary JSON
message = { "name" => "John", "age" => 30 }

# encode the hash into binary format using MessagePack
packed_message = MessagePack.pack(message)

# send the binary message to the UDP server
udp_socket.send(packed_message, 0, udp_server_host, udp_server_port)

# close the UDP socket
udp_socket.close
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In this example, we first create a UDPSocket object using UDPSocket.new. We then create a hash object called message with some example data. We use the MessagePack.pack method to encode the message hash into binary format.

Finally, we call the send method on the udp_socket object to send the binary message to the UDP server, specifying the server's IP address and port number as arguments.

Note that you'll need to have the msgpack gem installed in order to use the MessagePack class. You can install it via gem install msgpack.