In my setup, I have 2 layers of transparent proxies. When a client makes an SSL request, I wish to have the first proxy it meets simply forward the traffic to another one without attempting to do the handshake with the client.
The setup seems funny, but it is justified in my case – the 2nd proxy registers itself to the first one (through some other service) only occassionally. It tells the first: “I’m interested in some traffic that looks like___”. In most cases, the 1st proxy simply does the work.
Can an httpProxy (in node-proxy) proxy SSL requests? Must I use an httpsProxy (which will then do the handshake with the client)?
You could do all of this with the existing httpsProxy if you wanted to. Unless you are wanting to use a non-Node proxy or proxy to a different server, I can’t see what you would gain by having two.
Simply add the required the logging/signing logic to the existing httpsProxy.
Typically, I use https on the proxy to both restrict the number of open ports and to remove the need to do https on all of the Node servers running. You can also add Basic Auth using http-basic library too.
See my example code: https://github.com/TotallyInformation/node-proxy-https-example/blob/master/proxy.js
EDIT 2012-05-15: Hmm, after some thought, I wonder if you shouldn’t be looking at something like stunnel to do what you want rather than Node?