[jcifs] Verifying URL's in a domain.

Jessie Horton hortonjw at verizon.net
Tue Sep 4 20:59:00 GMT 2007


I need to verify if certain URL's exists.  I am currently using jcifs to help me handle the task.  As a test I have slightly modified the NtlmHttpClient sample file provided by the jcifs.samba.org site as seen below.  Anytime I run the code on a UNIX server I get the following error:

Exception in thread "main" java.lang.RuntimeException: java.lang.NullPointerException
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:904)
        at jcifs.http.NtlmHttpURLConnection.getInputStream(NtlmHttpURLConnection.java:242)
        at java.net.URL.openStream(URL.java:1007)
        at NtlmHttpClient.main(NtlmHttpClient.java:43)
Caused by: java.lang.NullPointerException
        at sun.net.www.protocol.http.NTLMAuthentication.init(NTLMAuthentication.java:138)
        at sun.net.www.protocol.http.NTLMAuthentication.<init>(NTLMAuthentication.java:133)
        at sun.net.www.protocol.http.HttpURLConnection.getServerAuthentication(HttpURLConnection.java:1582)
        at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1035)
        at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:1941)
        at jcifs.http.NtlmHttpURLConnection.parseResponseCode(NtlmHttpURLConnection.java:424)
        at jcifs.http.NtlmHttpURLConnection.doHandshake(NtlmHttpURLConnection.java:436)
        at jcifs.http.NtlmHttpURLConnection.handshake(NtlmHttpURLConnection.java:103)
        at jcifs.http.NtlmHttpURLConnection.getInputStream(NtlmHttpURLConnection.java:240)
        ... 2 more

I have been able to determine that the error is generated cause the user credentials were not passed correctly.  When I run the same code on a PC it works because my Windows credentials are passed transparently.  The credentials in the java code are completely over-looked.  I do know the credentials I am passing are correct because I use the same credentials to verify some smb:// links as well in a different java program using jcifs.  I also know the url is correct because if I paste it into firefox a user authentication window will popup and once I type in the following credentials :

username: some.domain.com\username
password: P at ssw0rd

The file will prompt to be saved or opened.

Could someone please take a look at the code and tell me if I am missing something or doing something wrong?

import java.io.*;
import java.net.*;
import jcifs.*;

public class NtlmHttpClient {

    public static void main(String[] args) throws Exception {

        Config.setProperty("jcifs.smb.client.domain", "some.domain.com");
        Config.setProperty("jcifs.smb.client.username", "username");
        Config.setProperty("jcifs.smb.client.password", "P at ssw0rd");

        try {
        } catch (Exception ex) { }
        URL url = new URL("http://portal/ISO/Department/test/Metrics/1234_METRIC_Mar07.xls");
        //URL url = new URL("http://some.domain.com%5Cusername:P%40ssw0rd@portal/ISO/Department/test/Metrics/1234_METRIC_Mar07.xls");
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(url.openStream()));
        String line;
        while ((line = reader.readLine()) != null) {


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