CODEWITHSUNDEEP
fiddler
Avian
Avian

Reputation: 299

How to put a breakpoint in a request sent through Fiddler?

In fiddler, how to terminate the request in between before it reaches the host. For eg I send a request and I want to put a breakpoint in that request so that I'm not able to receive the response. Basically, I want to inspect the response before it is returned to the original caller and how my service is behaving if there's a connection lost or some other termination by which the request was unable to reach the server. Any answer is highly appreciated. Sorry for any flaw, I'm a newbie in using Fiddler. :)

Upvotes: 4

Views: 10757

Answers (1)

EricLaw
EricLaw

Reputation: 57095

Fiddler offers several mechanisms for interfering with requests. If your goal is to simply kill the request without returning a response, you can create a rule with an Action of *drop or *reset rules in Fiddler's AutoResponder.

*drop will close the client connection immediately without sending a response. The closure is graceful at the TCP/IP level, returning a FIN to the client.

*reset will close the client connection immediately without sending a response. The closure is abrupt at the TCP/IP level, returning a RST to the client.

Alternatively, you can have Fiddler return any HTTP/4xx or HTTP/5xx to the client.

Lastly, you could use a breakpoint to allow you to manually manipulate the request before it's sent to the server, and/or manipulate the server's response before it's sent to the client. Use the bpu command in the QuickExec box to break on a given URL (e.g. bpu sample.asp).

Upvotes: 6

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