Dimuthuc’s Weblog

Just using what others shared..

WSO2 WSF/Ruby Stepping towards 1.0

Yesterday We were doing an RC on WSO2 WSF/Ruby. It will enable growing ruby and rails developers to feel the taste of WS-* stack without having any trouble.

WSF/Ruby is based on the WSO2 WSF/C which itself based on set of apache web service projects like Axis2/C, Rampart/C, Sandesha/C, Savan/C. So the WSF/Ruby will be great platform to experience the power of these project.

Consuming a web services with WSF/Ruby is really simple. It need very few line of code to do a simple web service,


require "wsf"   req_payload_string = "<greet> Hello </greet>" 

client = WSO2::WSF::WSClient.new({"to" => "http://greeting_host/myservice"}) 

res_message = client.request(req_payload_string) 

p res_message.payload_to_s << "\n"

The service provider code would be simple as this, You may put this on some function in the controller class inside Rails. (Yea I mean Ruby on Rails)


def greet(message)      if message.payload_to_s == "Hello"   

      "<greetResponse>Welcome!</greetResponse>"   

   else 

      "<greetResponse>Still Welcome!</greetResponse>" 

   end 

end

service = WSService.new({"operations" => {"greet" => "greet"}}) #the greet service operation to greet function map 

res = service.reply(request, response) 

render :text => res

Ok, That may seems ordinary. How about improving the service by authenticating the user with username tokens,Consumers may give their identity by adding some options at the constructor of WSO2::WSF::WSClient,


   policy_content = {"use_username_token" => true}   

 policy = WSPolicy.new({"security" => policy_content})   

 security_options = {"user" => "dimuthu",   

     "password" => "not my real one",   

     "password_type" => "Digest"} 

security_token = WSSecurityToken.new(security_options) 

options = {"to" => "http://greeting_host/myservice", 

      "policy" => policy, 

      "security_token" => security_token} 

client = WSClient.new(options)

And the service provider will also change their code just to authenticate the user,


  def passwordCallBack(username)    # hopefully you will be taking the password out from database   

  if(username == "dimuthu")   

    return "not my real one" 

  else 

    return "I m a guest" 

  end 

end  

policy_content = {"use_username_token" => true} 

policy = WSO2::WSF::WSPolicy.new({"security" => policy_content}) 

sec_token = WSO2::WSF::WSSecurityToken.new({"password_callback" => "passwordCallBack", 

                                            "password_type" => "Digest"}) 

wss = WSO2::WSF::WSService.new({"operations" => operations, 

                                "policy" => policy, 

                                "securityToken" => sec_token})

Similarly not only the username token, but also complete specifications of WS-Security, WS-Addressing, WS-Policy and WS-Reliable messaging can be used from a simple script with WSF/Ruby. This API is proven to be simple and popular with its predecessor WSO2 WSF/PHP. Hope we can do the same in Ruby as well.:)

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December 8, 2007 - Posted by | axis2/c, Programming, Ruby, Web services, WSF/C, WSF/PHP, WSF/Ruby, WSO2 | , , , , , ,

1 Comment »

  1. FYI, We finally did the 1.0.0 release. You can just visit our release from http://wso2.org/projects/wsf/ruby

    Comment by dimuthuc | January 5, 2008 | Reply


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