[alephnil]

True statelessness? Even if you disregard POST as "not true REST", the PUT and DELETE methods involve changing state. REST is an acronym for "representational STATE transfer", and is all about dealing with state in an simple and transparent way, not about avoiding it.

[sopooneo]

The server can have state, but there should be no communication about the client state. This is most tricky regarding logged-in/out session state usually communicated with cookies. http://ruben.verborgh.org/blog/2012/08/24/rest-wheres-my-sta...

Also, I have never read anything implying POST requests are incompatible with REST.