This afternoon Scott Hanselman posted a fairly innocuous question on twitter. However, the question involved versioning of a RESTful API, which is a subject that is sure to bring out lots of opinions. This post is less about the versioning question and more about the commonly held belief that caches do things differently with URLs that have […]
Uber recently announced the availability of a public API. I decided to take it for a spin and provide some commentary. The quick version is that it is a fairly standard HTTP API and that is both a good thing and a bad thing. You can find the official documentation for the Uber API on their […]
ASP.NET Web API 2.1 introduced some significant improvements to the mechanisms that support global error handling. Before this release there were a number of different types of errors that would be handled directly by the runtime and there was no easy way to intercept these errors and add your own custom behavior. The standard guidance suggests […]
I think most us ASP.Net Web API developers have, at some point, experienced the problem where their API is returning a 500 Internal Server Error, but tracing through with Visual Studio doesn’t reveal any exceptions in our code. This problem is often caused when a MediaTypeFormatter is unable to serialize an object. This simple message […]
If you use HTTP then the chances are good that you have to deal with HTTP headers. The syntax of HTTP headers has a long and tortured history, originating from the syntax of email headers. All too often I see headers that don’t conform to the specifications. This makes everyone’s job a little bit harder. […]
We are currently seeing a significant amount of discussion about building hypermedia APIs. However, the server side only plays part of the role in a hypermedia driven system. To take full advantage of the benefits of hypermedia, the client must allow the server to take the lead and drive the state of the client. As […]
In my first deep dive into a HTTP header on the user-agent header I said that I would try and produce a series of posts going under the covers on certain HTTP headers. This post is about the Vary header. The Vary header both wonderful and sad at the same time. I’ll discuss how to make it work […]
Several years ago when I was beginning to work on a large hyper media driven client, I recognized frequently recurring patterns and decided that I could raise the level of abstraction from an HTTP client to a hypermedia client. It took about a year to realize that it was not as good an idea as […]
In Web API 2.1 a new mechanism was introduced for returning HTTP messages that appeared to be a cross between HttpResponseMessage and the ActionResult mechanism from ASP.NET MVC. At first I wasn’t a fan of it at all. It appeared to add little new value and just provide yet another alternative that would a be a source of confusion. […]
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