Question

Can you recommend a good HTTP Debug Recorder and Autoresponder?
I usually use fiddler‘s autoresponder, but it does not enable rules to be set by POST information, only by querystring.

Answer 1

Fiddler can absolutely return automatically generated responses based on the content of a POST body, you simply cannot do it with the UI. Click Rules > Customize Rules, and enter your script inside the OnBeforeRequest handler.

if (oSession.uriContains("postpage.aspx") && 
  oSession.utilFindInRequest("mypostname=value"))
{
  oSession["x-replywithfile"] = "C:\\fakeresponse.htm"; 
}