This phase is probably the most familiar to us as developers, as it’s simply a login form. The consumer will send the user to us at the URL we provided in the request token, and the user will have the request token key as a parameter. The access control on this page will look the same as on the rest of the website; if the user has a session already then the page is displayed, otherwise they must be logged in to see it.
The consumer requests a request token (see my earlier post about consuming OAuth), and as a provider, we need to handle that request. In my example, I chose to pass the variables as GET parameters, but you could adapt this to handle POST variables or information contained in HTTP headers.
We have the same block of code called on every request where we’re negotiating OAuth, and it looks like this:
$this->provider = new OAuthProvider(); // set names of functions to be called by the extension $this->provider->consumerHandler(array($this,'lookupConsumer')); $this->provider->timestampNonceHandler( array($this,'timestampNonceChecker')); $this->provider->tokenHandler(array($this,'tokenHandler')); // no access token needed for this URL only $this->provider->setRequestTokenPath('/v2/oauth/request_token'); // now check the request validity $this->provider->checkOAuthRequest();
OAuth has a little more baggage with it than just passing a username and password to an API. As well as your standard service endpoint you will need: