In my current work environment, our Web access is proxied via a MS ISA server, which uses NTML proxy authentication. I was recently looking at NTLM proxy authentication, as I had problems running Subversion inside the proxy (this should be fixed now with the newest release of Neon, Subversion’s WebDAV layer). I am currently looking at some NTLM providers in the Java space, and one of the obvious ones I came across is the Jakarta HttpClient. Here is an example that will authenticate to an NTLM-based proxy. The code is for HttpClient 3.0-RC2.
package uk.co.researchkitchen.ntlm;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.NTCredentials;
import org.apache.commons.httpclient.auth.AuthPolicy;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.GetMethod;
public class TestNTLM {
private void execute() throws HttpException, IOException {
HttpClient proxyclient = new HttpClient();
proxyclient.getHostConfiguration().setHost("www.yahoo.com");
proxyclient.getHostConfiguration().setProxy("lproxyhost.researchkitchen.co.uk", 8080);
List authPrefs = new ArrayList();
authPrefs.add(AuthPolicy.NTLM);
proxyclient.getState().setProxyCredentials(
new AuthScope(null, 8080, null),
new NTCredentials("username", "password", "", "MYDOMAIN"));
proxyclient.getParams().setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, authPrefs);
GetMethod get = new GetMethod("/");
int status = proxyclient.executeMethod(get);
System.out.println(status);
BufferedReader bis = new BufferedReader(new InputStreamReader(get.getResponseBodyAsStream()));
int count = 0;
int read = 0;
System.out.println("Content length: " + get.getResponseContentLength());
char[] body = new char[2048];
do {
count = bis.read(body);
read += count;
System.out.println(body);
} while (count != -1);
System.out.println("Read " + read + " bytes");
}
public static void main(String[] args) throws HttpException, IOException {
new TestNTLM().execute();
}
} |
