grpc/examples/ruby/greeter_client.rb

#!/usr/bin/env ruby

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# Sample app that connects to a Greeter service.
#
# Usage: $ path/to/greeter_client.rb

this_dir = File.expand_path(File.dirname(__FILE__))
lib_dir = File.join(this_dir, 'lib')
$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)

require 'grpc'
require 'helloworld_services'

def main
  stub = Helloworld::Greeter::Stub.new('localhost:50051', :this_channel_is_insecure)
  user = ARGV.size > 0 ?  ARGV[0] : 'world'
  message = stub.say_hello(Helloworld::HelloRequest.new(name: user)).message
  p "Greeting: #{message}"
end

main