On 13.08.2010, at 05:50, Andreas Raab wrote:

> Hi -
> 
> I was playing with OAuth authentication and in the process decided to test it against Twitter and since it's kind of fun, I thought I'd share it with the rest of the world. You can run the (very simple) demo here:
> 
> 	http://ardemo.seasidehosting.st/seaside/twitter
> 
> All it does is after you log in via Twitter it shows you the account info that Twitter shares with the app and allows you to tweet a little.
> 
> The OAuth part itself is now integrated in WebClient's suite of auth methods and the little Twitter demo is available in http://www.squeaksource.com/ar.html and can be installed via
> 
> 	(Installer ss project: 'ar')
> 		install: 'Twitter-Squeak'.
> 
> Since I found OAuth to be a pretty major PITA I hope that this example will prove helpful for people who have to deal with this stuff.
> 
That sounds really good, Andreas. Can the implementation be used to offer an OAuth authenticated seaside service?

thanks,

Norbert

> Lastly, a Seaside question that came up in the above: Part of the OAuth process requires passing a specific callback url to the remote site (which is the url the user gets redirected to after authentication was successful). Since I couldn't figure out how to obtain the url otherwise, I've been stashing it away in a rendering method (since there's access to the rendering context's callback store) like here:
> 
> renderLoginPageOn: html
> 
> 	"Set up the callback url for Twitter to return to"
> 	callback := WAActionCallback on: [self twitterCallback].
> 	url := html actionUrl copy addField: (html callbacks store: callback).
> 
> 	"We need the host and the scheme here; the scheme is guesswork"
> 	urlString := 'http://', host, '/', url asString.
> 	oauthParams at: 'oauth_callback' put: urlString encodeForHTTP.
> 
> and then later the callback is passed to Twitter and the user sent back to the app. This works, but I'm wondering if that's the right thing to do, and if not, how one would set up and register such a callback url outside of rendering.
> 
> Cheers,
>  - Andreas
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