Rails - Feb 2006 - Trouble connecting to a Rails SOAP web service with a simple Ruby client

Hi,

The code for my Rails webservice is below. It working just fine
through the Rails web service scaffold invoke

http://localhost:3000/ProductBackend/invoke

I''m trying to write a plain ruby command line client to access the
webservice.

require ''soap/rpc/driver''
proxy = SOAP::RPC::Driver.new("http://localhost:3000/product_backend",
"urn:ActionWebService")
proxy.add_method(''find_product_by_id'', ''id'')
puts "Product: #{proxy.find_product_by_id(2).name}"

I also tried http://localhost:3000/ProductBackend

I see the following

$ ruby client.rb
/usr/local/lib/ruby/1.8/soap/streamHandler.rb:270:in `send_post'': 404:
Not Found  (SOAP::HTTPStreamError)
        from /usr/local/lib/ruby/1.8/soap/streamHandler.rb:103:in
`send''
        from /usr/local/lib/ruby/1.8/soap/rpc/proxy.rb:114:in `invoke''
        from /usr/local/lib/ruby/1.8/soap/rpc/proxy.rb:131:in `call''
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:275:in `call''
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:302:in
`find_product_by_id''
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:297:in
`find_product_by_id''
        from client.rb:4

What''s wrong?

Thanks,
Peter


############## app/controllers/product_backend_controller.rb ##############

class ProductBackendController < ApplicationController
  wsdl_service_name ''ProductBackend''
  web_service_api ProductBackendApi
  web_service_scaffold :invoke

  def find_product_by_id(id)
    Product.find(id)
  end
end


############## app/apis/product_backend_api.rb ##############

class ProductBackendApi < ActionWebService::API::Base
  api_method :find_product_by_id,
             :expects => [:int],
             :returns => [Product]
end

In case it helps here are the XML request and responses

Request XML:

<?xml version="1.0" encoding="utf-8" ?>
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <env:Body>
    <n1:FindProductById xmlns:n1="urn:ActionWebService"
       
env:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
      <param0 xsi:type="xsd:int">1</param0>
    </n1:FindProductById>
  </env:Body>
</env:Envelope>

Response XML:

<?xml version="1.0" encoding="UTF-8" ?>
<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <env:Body>
    <n1:FindProductByIdResponse xmlns:n1="urn:ActionWebService"
       
env:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
      <return xsi:type="n1:Product">
        <id xsi:type="xsd:int">1</id>
        <name xsi:type="xsd:string">gamma</name>
        <description xsi:type="xsd:string">An all time
classic.</description>
      </return>
    </n1:FindProductByIdResponse>
  </env:Body>
</env:Envelope>

I found out a little more but still am getting an error.

My client

require ''soap/rpc/driver''
proxy =
SOAP::RPC::Driver.new("http://localhost:3000/ProductBackend/api",
"urn:ActionWebService")
proxy.add_method(''find_product_by_id'')
puts "Product: #{proxy.find_product_by_id(2).name}"


Produces

$ ruby client.rb
/usr/local/lib/ruby/1.8/soap/rpc/driver.rb:300:in
`find_product_by_id'': wrong number of arguments (1 for 0)
(ArgumentError)
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:297:in
`find_product_by_id''
        from client.rb:6


and if I remove the 2 in the call to proxy.find_product_by_id so there
are no arguments (which is wrong, of course)

$ ruby client.rb
/usr/local/lib/ruby/1.8/soap/rpc/proxy.rb:132:in `call'': undefined
method `header'' for nil:NilClass (NoMethodError)
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:275:in `call''
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:302:in
`find_product_by_id''
        from /usr/local/lib/ruby/1.8/soap/rpc/driver.rb:297:in
`find_product_by_id''
        from client.rb:6

I''ve been fighting with this for hours. What''s going on?