excluded host are not allowed

[mergoktas]

if an host name is in the excluded list like
ProxyServer.ExcludedHttpsHostNameRegex.Add(".youtube.com");
then proxy closing down the connection. Then it is not possible to access the website.
In our case youtube. Please test the proxy with above line.

I think, it should just by pass the request directly to server if it is in the excluded list.
Like a by pass proxy. If it is not in the excluded list then we should be able to modify the request and response, Am I right or mistaken?

[justcoding121]

As the name indicates the exclusion is only valid for https requests. Browser know that its talking to a proxy not to the server. So each time it initiates a secure connection, it expects the proxy to tunnel Https requests by sending something like CONNECT youtube.com. However we trick the browser by lying to it that we are tunneling the request, but in reality we fake it with self-signed server certificate so that we can decrypt the traffic.

So in short if you are accessing youtube.com on http://youtube.com, proxy won't exclude the request. (Notice that request body is always relayed unless you decide to read it). However if youtube.com is in the ExcludedHttpsHostNameRegex list then all Https connections to youtube will be tunneled. You won't see that in request/response event handlers.

That is the expectation, but as you reported its not working properly as we expect.

[justcoding121]

This has been addressed in release branch