I want to build a simple NNTP proxy. However, I only need to intercept the POST command and then grab the message. I've done this and I've found it easy to accomplish. Do you think this slight variation of socketspy is actually useable, or do I need a more robust proxy? I was unable to find a NNTP proxy in Delphi/Cbuilder anywhere. I do like the simplicity of socketspy. I could build on it if I should need more in the future.
I wrote a SMTP/POP3 proxy server with HTTP tunnelling. You could use similar code in your NNTP proxy. Initially I wanted to implement NNTP the same way but had no time to do it yet.
The goal of my application (OverbyteGateway and OverbyteGatewayServer as I named the beast) is to allow someone to use standard SMTP/POP3 client such as Windows Mail Client within an organization where only HTTP is allowed with the help of a second program running on another computer. Any computer or server is OK. I even use a dynamic IP by the way of DynDNS service.
Instead of starting from SocketSpy I started at a higher level. I mean, SocketSpy works at the TCP level, not knowing anything about what is transported while the code I wrote understand SMTP and POP3 commands. This makes things easier as soon as you must intercept some specific command.
When I said "understand SMTP and POP3 commands", I don't mean complete command implementation. Since my proxy is mainly a tunnel, one side of the tunnel (client side) listen for POP3/SMTP commands, roughly decode it, encapsulate it into a HTTP request, send the the server side which in turn send it to the actual external SMTP/POP3 server. The code was fairly easy to write. Actually I implemented only the commands used by Windows Mail Client which I use. Other client program could require other commands altough it is likely not.
I have not yet had time to publish this code. It probably need some cleaning and some commenting. Anyway, if you or someone else want it, I can build a zip file and email it. No waranty and no commitment to support it altough I will do my best to answer questions in twsocket mailing list. The license is almost the same as TWSocket: you can use it freely for whatever legal you want but you cannot claim you wrote the code. You must include a notice in your software (source code, about box and documentation) that you used my code, with clear reference to me and my website.
And by the way, you can buy consulting or custom developement from me if you want me to customize that code for you, or private email support if you don't want to talk in public about your project. Email me for prices.
-- francois.pie...@overbyte.be The author of the freeware multi-tier middleware MidWare The author of the freeware Internet Component Suite (ICS) http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
