![]() ![]() You can also use Fiddler with other browsers by configuring the proxy settings manually or by running Fiddlers configuration script.įiddler by default uses the proxy address of 127.0.0.1 and port 8888. When Fiddler and IE are both open requests made in IE are automatically monitored in Fiddler (unless you explicitly turn monitoring off). as the domain/address -localhost or the local machine name don’t work.įiddler works automatically with Internet Explorer. after the 127.0.0.1 and before the port number. What about the ASP.NET local Web Server (Cassini)? There’s a nasty hack for accessing Cassini requests through Fiddler: Luckily there’s an easy workaround for this: Instead of using a local address use the NetBios Machine name or the local IP address:Īnd voila you have access to local addresses. The reason for this is that local addresses typically bypass any proxies (and the network adapter in general) and so localhost or 127.0.0.1 doesn’t show up. If you’re using Fiddler with a localhost or 127.0.0.1 address you’ll find that Fiddler will not monitor requests. NET HTTP clients like WCF or Web Service proxies or WebClient/HttpWebRequest objects, here are a few basic tips when using Fiddler for debugging in general: Running Fiddler against local Addresses In addition there are a few handy viewers that simplify viewing common types of content.īefore I get into the discussion of using Fiddler with. It also includes a nice request builder which is great for building up requests for testing without having to run code to generate a request against a service for example. One of the reasons that Fiddler works so well is because it has a nice, simple and very usable UI that makes it easy to monitor HTTP requests. NET application fires HTTP requests against a server. But even more importantly, FireBug – cool and useful as it is as the Swiss Army knife for Web development debugging - is limited to life inside of FireFox, so it does nada when you need to look at content outside of the browser such as when a. When things go wrong it is often highly useful to take a look under the hood and dig into the raw HTTP request data to see what HTTP headers were sent from the client to server and what headers and responses come back.įor plain Web development most of the time I actually use FireBug inside of FireFox, but when more detailed HTTP wire debugging is required I quickly revert to Fiddler, because it tends to provide more information and options on dealing with request data. ![]()
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