stateless

I've got a simple WCF service that lets clients/consumer applications log in by providing a username and password. If both the username and password are correct, the WCF service provides the client with a GUID. The GUID and the username are then stored as a key/value pair within the WCF service. From here onwards, the client sends their GUID with every request as a means of identification. Since I'm storing the key/value pair in a Dictionary/Hashmap, this approach would only work if the WCF service is stateful. Question is, are they stateful by default or is there something I have to do to

Imagine a more complex CRUD application which has a three-tier-architecture and communicates over webservices. The client starts a conversation to the server and doing some wizard like stuff. To process the wizard the client needs feedback given by the server. We started a discussion about stateful or stateless webservices for this approach. I made some research combined with my own experience, which points me to the question mentioned later. Stateless webservices having the following properties (in our case): + high scalability + high availability + high speed + rapid testing - bloated

I read What does “state transfer” in Representational State Transfer (REST) refer to? and several post or videos about REST, and I know one of the constraint of REST is stateless. According to many posts like http://www.restapitutorial.com/lessons/whatisrest.html ,to make the architecture stateless, the client must hold the enough information for the server to do the right thing, which means the server does not have any client state. So does it mean we are only about to build a REST application only through putting some user state in the client like cookie? But according to many posts like

The other minute I read an article on OAuth. It described especially the tokens being exchanged between client and service provider during a series of requests. The article also mentioned that OAuth gains significant popularity in RESTful APIs as authorization layer. As I understood, REST should be kept completely stateless. The question: Doesn't this repeated token exchange torpedo REST's "being stateless" principle? IMHO the tokens can be seen as a kind of session ID, can't they? OAuth tokens are explicitly a session identifier, interaction is not stateless between requests in the OAuth

I've seen this advice... ideally the web should follow the REST principle and be completely stateless. Therefore a single URL should identify a single resource, without having to keep the navigation history of each user. ...and I read the Wikipedia page http://en.wikipedia.org/wiki/REST and it really sounds good, but I don't get how to actually implement it. I'm working in ASP .NET Webforms NOT MVC. For example, in the application I am about to build - I need my user to Login before I allow them to do anything. There are a couple of hoops they have to jump through before they are allowed to do

I know you can pass all a react components props to it's child component like this: const ParentComponent = () => ( <div> <h1>Parent Component</h1> <ChildComponent {...this.props} /> </div> ) But how do you then retrieve those props if the child component is stateless? I know if it is a class component you can just access them as this.prop.whatever , but what do you pass as the argument into the stateless component? const ChildComponent = ({ *what goes here?* }) => ( <div> <h1>Child Component</h1> </div> ) When you write const ChildComponent = ({ someProp }) => ( <div> <h1>Child Component