echo_server.rb

#!/usr/bin/env ruby

# Copyright 2015, Google Inc.
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# Sample gRPC server that implements the EchoWithoutProtobuf service.
#
# Usage: $ path/to/echo_server.rb

this_dir = File.expand_path(File.dirname(__FILE__))
$LOAD_PATH.unshift(this_dir) unless $LOAD_PATH.include?(this_dir)

require 'grpc'
require 'echo_services_noprotobuf'

# EchoServer is simple server that implements the EchoWithoutProtobuf server.
class EchoServer < EchoWithoutProtobuf::Service
  # echo implements the EchoWithoutProtobuf 'Echo' rpc method.
  def echo(echo_req, _unused_call)
    echo_req
  end
end

# main starts an RpcServer that receives requests to EchoWithoutProtobuf at the sample
# server port.
def main
  s = GRPC::RpcServer.new
  s.add_http2_port('0.0.0.0:50051', :this_port_is_insecure)
  s.handle(EchoServer)
  s.run_till_terminated
end

main