specify response for fiddler core - fiddler

Question

I use fiddler core to intercept the request and provide a response to it. I know its possible to use saz files to save the response. But the problem is that I need to be able to customize the response. While its a saz file I cant customize the response manually.
Is there a way to save response caught by fiddler to a text file in json like format, so that I could edit it and could serve it as response to any request using fiddler core? For now i see I can save response as a plain text. But how do I load this request to fiddler or parse it with fiddler core to populate all the response properties? Is there some format I could use, that will allow me to manually edit the response?
UPDATE
I see I can just open saz archive, make my edits to reponse and use it to specify the response. Thats exactly what I was looking for. Also there is a way to save response session as har file. Is it possible to save one single response as har/saz file? Currently I can only save session and it contain all requests and responses. Is there a way to limit saved data to 1 request and 1 response?

Answer 1

You have a SAZ file, which contains the full content of a response. Your code may load the SAZ File into FiddlerCore using the Utilities.ReadSessionArchive method. You will then have an array of Session objects.
As FiddlerCore receives requests, you can evaluate whether or not you wish to reply to each request using a previously-loaded response or whether you want to instead let the request flow through to the server. To let the request flow through to the server, do nothing.
To return a previously-generated response, in FiddlerCore 2.4.6.4+ (not yet released), simply call utilAssignResponse on the new Session. For earlier versions of FiddlerCore without this new method, your OnBeforeRequest method should call a method that looks something like this:
public void utilAssignResponse(Session oS, HTTPResponseHeaders oRH, byte[] arrBody)
oS.utilCreateResponseAndBypassServer();
oS.oResponse.headers = (HTTPResponseHeaders)oRH.Clone();
oS.responseBodyBytes = arrBody ?? Utilities.emptyByteArray;
oS.oFlags["x-Fiddler-Generated"] = "Generated by myCode";
}