Thanks for FiddlerCore and the quick responses to questions on this forum.
I'm trying to intercept a webpage response, change some html, and have it display my change in the browser:
private void FiddlerApplication_BeforeResponse(Session oSession)
{
oSession.bBufferResponse = true;
oSession.utilDecodeResponse();
oSession.utilReplaceInResponse("TEXT-TO-REPLACE", "NEW-TEXT");
}
I should note that I'm using Windows 10, which I'm not sure if it makes any difference. I know that the oSession's ResponseBody text is updated when I use this code, however it seems like it doesn't get passed on to the browser from this point. Am I missing something? I've even tried utilSetResponseBody(updatedBodyText), however this doesn't seem to update the returned page either. Any thoughts or help would be greatly appreciated.
2 Answers, 1 is accepted
Rank 1
Yup, changing it inside BeforeRequest works.
One helpful thing you can do is prototype your changes in Fiddler itself (using FiddlerScript) before moving to FiddlerCore.
If you open your FiddlerScript, you'll see the following note:
//
// If a given session has response streaming enabled, then the OnBeforeResponse function
// is actually called AFTER the response was returned to the client.
//
// In contrast, this OnPeekAtResponseHeaders function is called before the response headers are
// sent to the client (and before the body is read from the server). Hence this is an opportune time
// to disable streaming (oS.bBufferResponse = true) if there is something in the response headers
// which suggests that tampering with the response body is necessary.
//
// Note: oSession.responseBodyBytes is not available within this function!
//
In FiddlerCore, the last possible moment to change bBufferResponse is the ResponseHeadersAvailable event.
Regards,
Eric Lawrence
Telerik