How do I use Fiddler to listen to the asp.net development server (i.e. cassini)?

Question

I am attempting to debug a (RESTful) WCF app using Fiddler. I run my project via VS IDE - which launches my app in the ASP.NET Development Server aka Cassini. I then launch Fiddler and in the Request Builder tab enter the following: "http://localhost:1066/GeneralService/sections/summary" with GET as the http method.

Fiddler responds with "[Fiddler] Connection to localhost failed.
Exception Text: No connection could be made because the target machine actively refused it ::1:1066 "

Is there some way for me to debug an app running on Cassini?

Thanks, Steve

Schematism

See #1578272 for the duplicate version of this question; that thread lists all possible approaches. – Dentiform

Answer 1

Change the url to http://ipv4.fiddler:1066/GeneralService/sections/summary to enable fiddler to listen on localhost

Timetable

Answer 2

One neat trick is just to add a period(.) after the word localhost. No other config neccesary.

Ternopol

woah. that works. Network magic.Someone got an explanation why? – Trail

Answer 3

You can use the integrated traffic monitor built into CassiniDev. It can be run stand-alone or as a direct drop-in replacement for VS 2008/2010 development servers.

alt text http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=cassinidev&DownloadId=123367 alt text http://i3.codeplex.com/Project/Download/FileDownload.aspx?ProjectName=cassinidev&DownloadId=123366

Pycnidium