From: Chris Gunnels <rfsllc@...>
Date: 2010-01-23T02:36:31+09:00
Subject: NoMethodError: undefined method `add_rpc_operation' for nil:

FYI: this is in a Sinatra app. Don't know if that matters though.

NoMethodError: undefined method `add_rpc_operation' for nil:NilClass
  from
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/soap/rpc/httpserver.rb:95:in
`add_rpc_method_as'
  from
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/soap/rpc/httpserver.rb:87:in
`add_method'
  from ./soap_server/server.rb:8:in `initialize'
  from (irb):5:in `new'
  from (irb):5

I am running this in irb:

require 'soap/rpc/standaloneServer'
require 'soap_server/server' # includes the SoapServer class
server = SoapServer.new('hws', 'urn:hws', '127.0.0.1', 6565)

SoapServer class looks like this:

require File.dirname(__FILE__) + '/../vendor/gems/environment'
require "soap/rpc/standaloneserver"

begin
  class SoapServer < SOAP::RPC::StandaloneServer
    # Expose our services
    def initialize(*args)
      add_method(self, 'add', 'a', 'b')
      add_method(self, 'div', 'a', 'b')
    end

    # Handler methods
    def add(a, b)
      return a + b
    end
    def div(a, b)
      return a / b
    end
  end
rescue Exception => e
  puts e.message
end
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