Communicating with an HTTP Proxy via a .NET TcpClient

c# .net http-proxy
picture · Mar 27, 2009 · Viewed 12.4k times · Source

How can I communicate through an HTTP proxy with TcpClient in C#, kind of like WebProxy when using HttpWebResponse?

Answer

Jon Skeet picture Jon Skeet · Mar 27, 2009

Well, TCP doesn't have anything directly equivalent to HTTP proxying. In HTTP, the client (generally) knows about the proxying - it talks to the proxy, and asks the proxy to connect to the real web server on its behalf.

TCP doesn't define that sort of thing, so any proxying would have to either be transparent (i.e. something that a router or the operating system does without the client knowing, e.g. with iptables) or as part of the protocol on top of TCP (HTTP proxying is a good example of this, as is SOCKS mentioned in a different answer).

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