Fiddler script to automatically save response body - scripting

Question

I need help writing a script for fiddler. What I need is to automatically save a certain response body every time it comes up in the session window.
I have tried to follow the instructions in this post Fiddler Script - SaveResponseBody() but I just get an error when I try and save CustomRules.js. (I could be inserting in wrong or in the wrong place)
I am new to fiddler and scripts so any help here would be greatly appreciated.
I have tried adding this:
static function OnBeforeResponse(oSession: Session) {
if(oSession.url.EndsWith(".png")) {
oSession.SaveResponseBody(); //Actual content of OnBeforeResponse function.
}
}
and then adding this:
if ((oSession.responseCode == 200) &&
oSession.oResponse.headers.ExistsAndContains("Content-Type", "image/png")) {
SaveResponseBody("C:\\temp\\" + oSession.SuggestedFilename);
}
to the CustomRules.js script.

Answer 1

SaveResponseBody is a method on the oSession object.
oSession.SaveResponseBody("C:\\temp\\" + oSession.SuggestedFilename);

Answer 2

Be sure to add your code within OnBeforeResponse(oSession: Session) { ... } function
The following code will save the request and response body of any url that contains "procedimentoservice" and a response code that differs from OK (200).
if (oSession.PathAndQuery.ToLower().Contains("procedimentoservice"))
{
if(oSession.responseCode != 200)
{
var directory2 = "C:\\log\\NEXT\\";
var filename2 = oSession.oRequest.headers['SOAPAction'].ToString().Replace('"','') + "_" + Guid.NewGuid();
var path2: String = System.IO.Path.Combine(directory2, filename2);
oSession.SaveRequestBody(path2 + "_request.txt");
oSession.SaveResponseBody(path2 + "_response.txt");
}
}
File names will be in the following format:
c:\log\NEXT\CriarEvento_fa15709e-b2a8-402d-a623-e4f01e6e8ae1_request.txt
c:\log\NEXT\CriarEvento_fa15709e-b2a8-402d-a623-e4f01e6e8ae1_response.txt
c:\log\NEXT\CriarEvento_ff650cf8-8fe6-47a2-8552-a4d8bce246f3_request.txt
c:\log\NEXT\CriarEvento_ff650cf8-8fe6-47a2-8552-a4d8bce246f3_response.txt