Help with Web proxy server needed......

[Jim Hubbard]

I want to write a custom web proxy server using VB.Net 2.0 to allow the end
user to filter out images or "adult content" or objectionable words and even
ads.

But, I have a couple of questions and would very much appreciate any help
that you might be able to give me concerning them.

1) Is VB.Net 2.0 sufficient for a high speed, heavy load web proxy server or
should I consider using something else?

2) Have you seen this type of thing done in VB.Net 2.0? If so, is the
source code available for me to learn from?

3) Are there any special pitfalls that I should look for when writing a web
proxy server specifically for the HTTP protocol?

Thanks so much for your help!

 

[Vadym Stetsyak]

1) Is VB.Net 2.0 sufficient for a high speed, heavy load web proxy server

or should I consider using something else?

IMO, it depends. There are implementations of servers in Java that have
nearly the same
performance as unmanaged ones. The same can be applied to .NET

( http://www.eecs.harvard.edu/~mdw/proj/seda/ )

2) Have you seen this type of thing done in VB.Net 2.0? If so, is the
source code available for me to learn from?

It is not in VB, but C#, there should be no problems comverting to VB

( http://www.mentalis.org/soft/projects/proxy/ )

3) Are there any special pitfalls that I should look for when writing a
web proxy server specifically for the HTTP protocol?

Generally, if you will follow HTTP RFC (
www.w3.org/Protocols/rfc2616/rfc2616.html )
then there should be no problems...

One of the issues is described here
(
http://vadmyst.blogspot.com/2006/01/proxy-server-behavior-with-different.html )