Fiddler is a great http debugging tool, allowing you to see all traffic going in and out. It’s very useful when for example working with ADO.NET Data Services to see which request is being sent to the service.
It so happened that since I had been using Windows 7, I hadn’t used or installed it yet. I was just creating a Silverlight application that works with ADO.NET Data Services and there was a specific query I wanted to see. So I installed Fiddler 2 on this Windows 7 machine.
Normally, when using Fiddler for local debugging, you add a “.” after the localhost: http://localhost.:1234/whatever.aspx. This should show the requests in Fiddler. However, it didn’t seem to work on my machine.
Luckily, I knew there was another way to see the local requests: using the ipv4 notation: http://ipv4.fiddler:1234/whatever.aspx. This seems to work.
I’m not sure if this has something to do with Windows 7 though. In any case, this second approach seems to work, so it might come in handy if the first one doesn’t work on your PC either :).
Fiddler can be downloaded on www.fiddler2.com (thanks Dominiek)