Retrieving the client’s IP address in ASP.NET Web API

net asp.net web api c-sharp

One of the common tasks, for logging or authorization purposes, is to obtain the IP address of the client accessing your Web API.

There are different ways to achieve this depending on whether you are web hosting (through HttpContext) or whether you are self hosting (through WCF’s RemoteEndpointMessageProperty).

To avoid the redundant code, we can unify those approaches under a single extension method, which you can use across all your projects.

scriptcs and using Azure Mobile Services from your scripts

net azure c-sharp scriptcs

Hopefully by now you have already heard about the sriptcs project, which allows you to write script based applications with C# and Nuget.

If not, have a look at the readme and the great introduction post by Scott Hanselman to get started.

Actually, just today, we have released v.0.4 of scriptcs! To celebrate that, let’s revisit one of our favorite topics - Azure Mobile Services - and how you can use it with scriptcs.

The future is now – OWIN and multi-hosting ASP.NET web applications

net asp.net web api katana owin signalr

As you probably know, the ASP.NET team is publishing the latest ASP.NET Web API on a nightly MyGet feed, and you can grab them from there and play with the latest stuff without having to deal with all the hassle related to building from the source.

The same applies to Katana, a Microsoft generic Owin host, which also has its own MyGet nightly feed.

Let’s glimpse into the near future and have a look at putting the latest Katana bits to play with ASP.NET Web API and other frameworks.

ASP.NET Web API and greedy query string parameter binding

net asp.net web api c-sharp

Following the last article on parameter binding from URI, I received an interesting question - “what if I wanted to prevent binding parameters from query string and only allow binding from route values”? In other words, prevent passing values to actions via query strings and only look for them in the route itself (to avoid duplicate ways of reaching the same endpoint).

This is possible in Web API - let’s explore how you’d go about implementing it.

More after the jump.

ASP.NET Web API parameter binding part 1 – Understanding binding from URI

net asp.net web api c-sharp

Today, let’s kick off a series intended to look at different aspects of HTTP parameter binding in ASP.NET Web API. Why? Aside from the awesome series by Mike Stall, there isn’t really that much material on the web on this particular subject. And developers coming from MVC background, often get surprised by differences in the model binding mechanism between MVC and Web API.

In this first post, let’s have a brief overview of parameter binding in Web API and then specifically look at binding model from URI.

More after the jump.

Collaborative route planner with SignalR, Knockout.js and Google Maps

net c-sharp knockout.js signalr
Today I have published a new article over at my friends from Tech.pro. This time, we continue on the topic of SignalR & Knockout.js, and look at implementing a real-time collaborative route planner with the use of Google Maps API. Hopefully you’ll enjoy the article as much as I enjoyed writing it. These libraries, really make a lot the development tasks feel like true magic! As you usually, the source code is on GitHub.

Hosting ASP.NET Web API in LinqPad

net asp.net web api c-sharp

Today I stumbled upon an interesting Stackoverflow question, where the user was asking how to go about self-hosting Web API in LinqPad.

The question has gone unanswered since December, and I’m guessing even the OP forgot about it. However, I’d like to elaborate a bit about the topic. You certainly can host Web API in LinqPad, provided you plug in a quick work around - and we actually did hit a similar issue with scriptcs.

Per request error detail policy in ASP.NET Web API

net asp.net web api c-sharp

ASP.NET Web API does a really good job at letting you control the amount of error details returned in the framework responses. And that is for both your own (“developer-generated”) exceptions, as well as the ones produced by the Web API itself.

However, this setting (IncludeErrorDetailPolicy) is global, and configured against the HttpConfiguration, making runtime manipulation of the error detail policy rather difficult.

However there is a trick you can use.

More after the jump.

Shopping cart with SignalR, ASP.NET Web API and Knockout.js

net asp.net web api c-sharp knockout.js signalr
I have published an article at Tech.pro today, about building a real-time shopping cart with some of our favorite technologies - ASP.NET Web API, SignalR and Knockout.js (or, as Brad would say, with the “Webstack of Love”). Click here to head over there and read the article!

Leveraging Roslyn to author ASP.NET Web API without recompiling

net asp.net web api c-sharp roslyn

Some time ago I posted a mini-series of posts about using Roslyn to script Web API, and that has gotten some great response. In that original post, I mentioned & used, without going into too much details, a very useful “compiler as a service” feature Roslyn offers.

Recently, Glenn Block started a very exciting project called scriptcs (which now Justin Rusbtach and I happen to be a part of too) to provide a seamless/node.js-esque scripting experience for C# and in that project we indeed leverage on Roslyn heavily - to do some behind the scenes tricks to hide the compilation aspect from the user, so that it really resembles pure script execution.

About

Hi! I'm Filip W., a software architect from Zürich 🇨🇭. I like Toronto Maple Leafs 🇨🇦, Rancid and quantum computing. Oh, and I love the Lowlands 🏴󠁧󠁢󠁳󠁣󠁴󠁿.

You can find me on Github, on Mastodon and on Bluesky.

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Microsoft MVP

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