Does anyone know the usage of “Proxy-agent” response header ?
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Proxy-Agent:is a non-standard header – it is not defined by any HTTP RFC. As a result, it should technically beX-Proxy-Agent:. If you want a definition of anything about the way that HTTP works, RFC 2616 is your bible.Because it is non-standard, there is no definite answer to this question. At a guess, from the name of the header, it would contain the name of the HTTP proxy software that is handling the request on behalf of the
User-Agent:. But, because it is non-standard, what it actually means could be something completely different.What I can tell you is that, because it is non-standard, it is not likely to be pertinent to the way you handle the request – although it likely informs you that there is at least one proxy somewhere along the route between the client and the server.