I am on a Windows machine at work and am using HttpClient to make a request via a web proxy. But the problem is that I keep 407 Authentication required message.
But if I do the same thing via the RestTemplate of Spring, which uses the vanilla java.net.URLConnection class, with supplying just the proxy address and port, it works fine. *It doesn't even need the user name and password for authentication. * Why does this work? Why does HttpClient fail? Doing some digging into the source I made out that HttpClient first opens a socket to the required address and then reads and writes from that socket. AFAIK, java.net.URLConnection does not do that. So my question is what does java.net.URLConnection do differently? What is the difference between opening a socket. Also how do I make HttpClient behave like java.net.URLConnection so that I can avoid the error. Clearly java.net.URLConnection is doing something right. Any help or suggestions ? -- Regards, Sreyan
