Browsing posts in: asp.net web api

Return types, action parameters and data annotations now available in Web API 2.1 Help Page

On Friday Microsoft released a 2.1 version of Web API (along with MVC 5.1 and Web Pages 3.1). The release announcement was made yesterday and can be read here – but pretty much all of the new features have already been discussed on this blog, when we dissected the 2.1 RC released last month.

One thing I wanted to highlight today though, are the changes to the Help Page, and its new capabilities to document return types, action parameters and data annotations on your models/DTOs.

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OWIN/Katana in-memory integration testing

A while ago we looked at testing the ASP.NET Web API pipeline using its in-memory hosting capabilities.

The advantages of such approach to end-to-end testing are unquestionable.

Now, with the emergence of OWIN as the primary hosting option for a wide array of web frameworks, it makes sense to explore how you could to the same, except in the OWIN (or rather Katana, since all the things shown here are Katana specific) context – so not just against Web API, but against any framework of your choice (running on top of OWIN & Katana).

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ASP.NET Web API 2.1 RC is out – what’s new?

It seems that only yesterday we were blogging about new features in Web API 2 and discussing what’s coming up next for Web API at the MVP Summit.

Meanwhile, the ASP.NET team kept it’s frantic work pace and already before Christmas dropped on Nuget a 2.1 RC of Web API (as well as new MVC and Web Pages).

While in the open source mode of operation (public commits, nightly builds) this is that big of a news, it is still a very nice piece of news. Let’s look at what’s new.

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Asynchronous action filters in ASP.NET Web API

It is rather to common to use filters in Web API to perform common tasks around your actions in an AOP (aspect oriented programming) way.

To create a filter you simply inherit from an abstract ActionFilterAttribute class and override the relevant method:

This is all nice and simple, but what if the operation you need to perform, should by asynchronous? Surely async void is a terrible idea.

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Output Caching in ASP.NET Web API 2

A while ago I released a little library for Web API caching – called CacheOutput.

With the release of Web API 2, some things change (obviously the Web API core gets a bump to 5.0) so the library required a new release. I have decided to take a page out of the book of my friends over at Autofac, and do not release over the old Nuget package, but instead release a new one specifically for Web API 2.

If you are in need of caching for Web API 2, you should use the package called Strathweb.CacheOutput.WebApi2

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ASP.NET Web API 2 is out! Overview of features

Today the ASP.NET team released ASP.NET Web API 2 (and, for that matter, MVC 5 too)! The announcement, just as like year, followed many other big Microsoft releases (Windows 8.1, Visual Studio 2013 etc) in a synchronized product shipping event.

New Web API is now available on Nuget – where it directly replaces the old version of Web API. Let’s look at the major features of ASP.NET Web API 2.

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Dynamic per-controller HttpConfiguration in ASP.NET Web API

Recently I faced an interesting problem, where we needed to provide controllers with controller-specific configuration – but based on settings only known at runtime.

In Web API, per-controller configuration is a very useful, yet little known feature (aside from a great blog post by Mike Stall), as it allows you to create configuration profiles and assign them to specific controllers.

However it is only supported statically – through attributes, so it cannot be altered at runtime. Let’s have a look at how you might be able to hack away at it.

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Adding high performance Windows Azure Cache Service to your ASP.NET Web API

Microsoft has recently announced the preview release of Windows Azure Cache Service – intended to allow you to easily deploy high performance, dedicated, distributed cache for your applications.

You can read more about the feature (and it does seem really awesome at first glance), in the thorough announcement post by Scott Guthrie.

Let’s look at how you can leverage this powerful service from ASP.NET Web API.

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ASP.NET Web API 2 and HttpRequestContext

Last week (23 August) ASP.NET Web API 2 RC (release candidate) was released on Nuget. One of the interesting changes in this version is the emergence of HttpRequestContext – which provides a shortcut, strongly typed access to the information which up to this point hidden inside of Request.Properties dictionary, as well as some additional useful bits and pieces.

Let’s explore what’s under the hood.

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