For the extension I work on it might happen that I need to recognize a HTTP request to a domain that does not exist. However if such a session ends with "HTTP/1.1 502 Fiddler - DNS Lookup Failed" in the Response Header, my extension is not triggered.
Such responses neither trigger the
method, nor the
method. My question is, what can I do here to notice such cases with my extension?
And another question, which other cases should I be aware of that don't cause a proper response?