It’s always been on my todo list to spend more time with Ruby with a big motivation being able to write some more powerful sipsorcery dialplans. Last week I got an incentive to finally do it when I came across a Ruby on Rails cloud platform called Heroku. Heroku operates on top of Amazon’s EC2 but rather than dealing with EC2 instances and images they abstract that all away and allow programmers to work at an application layer. The Heroku experience is close in some respects to Microsoft’s Windows Azure cloud platform, which I’ve also been spending a fair bit of time with. There’s pros and cons to each of course, Heroku’s is a lot more polished, a lot quicker to pickup and a lot quicker to deploy with while Windows Azure is more powerful given that the .Net framework is more comprehensive and has deeper hooks into the underlying Windows OS than the Ruby on Rails software does. In fact it would probably be a better comparison to compare an ASP.Net MVC web application hosted on Windows Azure to Heroku’s offering. The same pros and cons listed previously still apply and for a programmer unfamiliar with either Heroku and Ruby on Rails have a much smaller learning curve but in my opinion an ASP.Net MVC application is more powerful and manageable.

What’s all this got to do with sipsorcery?

As part of my exploration of Heroku & RoR I thought it would be worthwhile to get a basic web app deployed that would hook into the sipsorcery web services. It would give my exercise of attempting to learn RoR a goal and maybe it could be the starting point for another programmer out there to put together a non-Silverlight interface for sipsorcery, something which comes up regularly on the sipsorcery forums.

The sipsorcery web services have always been available via a SOAP API although as far as I know nothing except my Silverlight client has ever consumed it. SOAP APIs are out of fashion these days though and REST and JSON are now the flavour of the month, they are also easier to use so that’s good news. I have exposed a few sipsorcery methods over REST, specifically the login and get SIP account methods, and it was there that I wanted to hook up from a Heroku RoR app.

The result of my efforts is at https://sipsorcery.heroku.com/auth/login. It’s a completely bare bones application, absolutely no effort has gone into the user interface, that lists the ID’s, usernames and domains of the first 10 SIP accounts belonging to a sipsorcery user. I’ve only been using RoR for a week so I’m not fully confident about the application being fully secure but the two communications channels, browser to the Heroku app and the Heroku app to the sipsorcery REST API are both SSL, so I’m satisfied enough to use my own sipsorcery username and password with it.

If there are any RoR programmers out there that use sipsorcery and are interested in a non-Silverlight interface my very crude code for the above application is hosted on github.

The main concept of the RoR app is the connection to the sipsorcery REST API. The Ruby code to accomplish that is very succinct and I’ve posted it below for anyone interested. The user and pass values need to be replaced with valid sipsorcery account details and if the code works it will dump SIP account details as a block of JSON encoded data which looks very messy but is easy for a programmer to work with.

require 'httpclient'
require 'rexml/document'

puts "starting json test..."

baseURL = "https://www.sipsorcery.com/provisioning.svc/rest/"

client = HTTPClient.new
resp = client.get_content("#{baseURL}customer/login?username=user&password=pass")
authID = REXML::Document.new(resp).elements[1].text
puts "authID=#{authID}"

sipClient = HTTPClient.new
resp = sipClient.get_content("#{baseURL}sipaccounts?count=10", nil, "authID" => authID)
puts "SIP Accounts=#{resp}"
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