Adding an HTTP RPC Service using webHttpBinding for an Existing SOAP Service implemented with WCF?

I've been told that adding an HTTP RPC web service given an existing SOAP web service implemented with WCF is as simple as adding a webHttpBinding and a couple of attributes.

I'd be grateful if someone could show how to implement such an HTTP RPC web service using webHttpBinding given an existing SOAP web service that is based on WCF. It would be s开发者_高级运维uper helpful if the answer could show all the code for both services and even more helpful if the example is self-contained so that someone could install for testing without having to know anything about either. FYI, while I have programmed on the .NET stack it's been ~5 years and today all my work is on LAMP so I'm just not familiar enough with the latest generation .NET stack or it's current runtime environments.

My specific use-case is a set of two (2) services where one responds with an AuthToken and then a second service where I pass the AuthToken and Username, Password and another bit of information and the response back is a user object with attributes like 'first_name', 'last_name', etc. Ideally I'd be able to access those same services via two different URLs and the responses I would get back would be in JSON format.

Note I'm looking for an example to be installed by someone else who programs on the .NET stack but isn't highly motivated to do won't much extra work. I'm trying to get an HTTP-based web service I can use without having to add a SOAP client to the existing PHP framework I am using and I think if I could get a concise example of how to add such an HTTP RPC web service the .NET programmer might be happily willing to add the HTTP RPC web service for my needs. FYI, the web service in question was developed specifically for this use case and is not part of a standard set of SOAP services documented for and in use by lots of other developers.