create a udp server in ruby

To create a UDP server in Ruby, you will need to create a socket object and bind it to a specific port. Here is an example code snippet:

main.rb
require 'socket'

# Create a UDP socket object
udp_server = UDPSocket.new

# Bind the socket to port 1234
udp_server.bind('0.0.0.0', 1234)

# Receive data from the socket
loop do
  data, addr = udp_server.recvfrom(1024)
  puts "Received #{data} from #{addr}"
end

# Close the socket
udp_server.close
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In this code, we first require the socket library. Then, we create a new UDPSocket object and bind it to port 1234. We then enter an infinite loop that receives data from the socket using the recvfrom method. This method blocks until data is received, and returns the data as well as the address it was sent from. Finally, we print out the received data along with its source address.

You can run this code in a terminal window to start the server, and then send data to it using a UDP client.