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Lorna Mitchell:
OAuth Middleware for Slim
October 09, 2013 @ 11:53:37

Lorna Mitchell has posted about some middleware for the popular Slim (micro)framework that helps with OAuth functionality.

OAuth can be anything you want it to be, the standards are lax and give you plenty of room for getting the right implementation for your system. However you proceed, though, you'll need to check an access token on every request - and in a Slim application, a middleware can help enormously since it hooks in to every request by design. I've recently implemented this and thought I would share.

She's created a basic middleware component that can be easily dropped into the framework to handle the checking of the tokens via an "AuthService" object. She also includes a brief snippet of how she generates the codes, combining the output of bin2hex and openssl_random_pseudo_bytes.

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oauth middleware slim access token validation generate


Gonzalo Ayuso:
Bundles in Silex using Stack
July 17, 2013 @ 11:10:34

Gonzalo Ayuso has a recent post to his site showing you how to use Stack to create bundles for your Silex-based applications. Stack is a structure that allows for the reuse of HttpKernelInterface middleware to create a custom "stack" of functionality.

Nowadays almost every modern framework/applications implements HttpKernelInterface (Symfony, Laravel, Drupal, Silex, Yolo and even the framework that I'm working in ;) ) and we can build complex applications mixing different components and decorate our applications with an elegant syntax. The first thing than come to my mind after studying Stack is to join different Silex applications in a similar way than Symfony (the full stack framework) uses bundles.

In his example, he shows an example of a simple GET endpoint for a blog and API. In the first version, he calls the "run" method to execute the handling of the request. The second example, however, includes the attachment of a simple "MyKernel" middleware to the stack and calls "handle" to apply and send the modified Response back to the user.

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silex stack tutorial introduction middleware httpkernelinterface


Igor Wiedler:
Introducing Stack
June 04, 2013 @ 12:46:42

Igor Wiedler has started up a new project that helps you combine "stacks" of middleware related to the HttpKernelInterface from Symfony as a sort of decorator to its base functionality - Stack.

In the post titled HttpKernel middlewares I brought up the idea of bringing rack middlewares to Symfony2. In order to solidify this effort I would like to announce a new project: Stack. Stack is a convention for composing HttpKernelInterface middlewares. The name and logo are based on the idea of building a stack of middleware layers, each of which handles a particular piece of logic. [...] The main goal of stack is to give the idea of "HttpKernel middlewares" a name, so that we can more easily talk about it.

There's a stackphp organization on Github that has the start of this set of middleware pieces including tools to help you build other features. The project is focused around the Symfony HttpKernelInterface because it was the simpler, more standardized option for now. He notes that there's no reason that, in the future, when things are more standardized it couldn't broaden out to PHP as a whole.

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symfony httpkernelinterface stack middleware project

Working with Slim Middleware
February 21, 2013 @ 09:23:24

On Timothy Boronczyk has written up a tutorial about using the Slim microframework as a sort of "middleware" in your application - a wrapper around other functionality with an easier to use interface.

Slim is a microframework that offers routing capabilities for easily creating small PHP applications. But an interesting, and powerful, feature is its concept of Middleware. [...] I've found middleware to be an eloquent solution for implementing various filter-like services in a Slim app, such as authentication and caching. In this article I'll explain how middleware works and share with you a simple cache example that highlights how you can implement your own custom middleware.

He talks about what "middleware" is (complete with illustration) and how Slim can be used as a layer in the middleware stack. His example is a caching layer, based on Slim, that takes a request, checks the cache for it and returns it if it exists. If not, it saves the content to a database. He also includes code examples of how to use the "add" method to introduce your middleware libraries into the Slim application.

If you'd like more examples, the Slim project has several middleware examples provided in their "extras" github repository.

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slim middleware tutorial cache layer microsframework

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