Hi,
I've traced Client.java and try to write a simple program to connect to
my slide 'http://137.189.94.70:8080/slide'. The program has been attached.
However, it fails to connect with the following WARNING and
NullPointerException shown as follows:
uri is http://137.189.94.70:8080/slide
Apr 1, 2003 12:23:17 PM org.apache.commons.httpclient.HttpMethodBase
processAuthenticationResponse
WARNING: No credentials available for the Basic authentication realm
'Slide DAV Server'
Exception in thread "main" java.lang.NullPointerException
at org.apache.webdav.cmd.Spool$2.write(Spool.java:163)
at java.io.PrintStream.write(PrintStream.java:258)
at
sun.nio.cs.StreamEncoder$CharsetSE.writeBytes(StreamEncoder.java:334)
at
sun.nio.cs.StreamEncoder$CharsetSE.implWrite(StreamEncoder.java:393)
at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:134)
at java.io.OutputStreamWriter.write(OutputStreamWriter.java:191)
at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:111)
at java.io.PrintStream.write(PrintStream.java:304)
at java.io.PrintStream.print(PrintStream.java:448)
at java.io.PrintStream.println(PrintStream.java:585)
at Testing.handleException(Testing.java:232)
at Testing.connect(Testing.java:105)
at Testing.main(Testing.java:242)
What's the problem?
import java.io.FileInputStream;
import java.io.DataInputStream;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.File;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.FileNotFoundException;
import java.util.Date;
import java.util.Stack;
import java.util.Vector;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.StringTokenizer;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.net.URL;
import java.net.MalformedURLException;
import org.apache.webdav.lib.WebdavResource;
import org.apache.util.HttpURL;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.HttpException;
import org.apache.webdav.cmd.Spool;
public class Testing{
static private Spool spool;
static private HttpURL httpURL;
static private WebdavResource webdavResource = null;
static private File dir = new File(".");
static private int debugLevel = 0;
static InputStream in;
static PrintStream out;
static private String commandPrompt =null;
static private String path = "";
public Testing(){
}
private static void init(){
spool = new Spool(in,out);
in = in;
out = new PrintStream(spool.getOutputStream());
// updatePrompt(getPath());
}
private static void connect(String uri){
System.out.println("uri is " + uri);
try {
// Set up for processing WebDAV resources
httpURL = new HttpURL(uri);
if (webdavResource == null) {
webdavResource = new WebdavResource(httpURL);
webdavResource.setDebug(debugLevel);
} else {
webdavResource.close();
webdavResource.setHttpURL(httpURL);
}
setPath(webdavResource.getPath());
}
catch (HttpException we) {
if (we.getReasonCode() == HttpStatus.SC_UNAUTHORIZED) {
try {
out.print("UserName: ");
BufferedReader in =
new BufferedReader(new InputStreamReader(System.in));
String userName = in.readLine();
if ((userName==null) || (userName.length()==0)) {
disconnect();
return;
}
userName = userName.trim();
System.out.print("Password: ");
String password = in.readLine();
if (password != null)
password= password.trim();
try {
if (webdavResource != null)
webdavResource.close();
} catch (IOException e) {
} finally {
httpURL = null;
webdavResource = null;
}
httpURL = new HttpURL(uri);
// It should be used like this way.
httpURL.setUserInfo(userName, password);
webdavResource = new WebdavResource(httpURL);
webdavResource.setDebug(debugLevel);
setPath(webdavResource.getPath());
}
catch (Exception ex) {
handleException(ex);
httpURL = null;
webdavResource = null;
}
}
else {
handleException(we);
httpURL = null;
webdavResource = null;
}
}
catch (Exception ex) {
handleException(ex);
webdavResource = null;
httpURL = null;
}
updatePrompt(getPath());
}
private static String getPath()
{
return path;
}
static void disconnect()
{
out.println("disconnect");
try {
webdavResource.close();
} catch (IOException e) {
} finally {
// Make sure the connection closed.
httpURL = null;
webdavResource = null;
}
updatePrompt(getPath());
}
private static void updatePrompt(String path)
{
StringBuffer buff = new StringBuffer();
try {
buff.append("[" + httpURL.getHost().toUpperCase() + "] ");
buff.append(path);
} catch (Exception e) {
buff.append("[ Slide ]");
}
buff.append(" $ ");
commandPrompt = buff.toString();
}
private static void setPath(String path1)
{
if (!path1.endsWith("/")) {
path1 = path1 + "/";
}
path = normalize(path1);
}
private static String normalize(String path)
{
if (path == null)
return null;
String normalized = path;
// Normalize the slashes and add leading slash if necessary
if (normalized.indexOf('\\') >= 0)
normalized = normalized.replace('\\', '/');
if (!normalized.startsWith("/"))
normalized = "/" + normalized;
// Resolve occurrences of "/./" in the normalized path
while (true) {
int index = normalized.indexOf("/./");
if (index < 0)
break;
normalized = normalized.substring(0, index) +
normalized.substring(index + 2);
}
// Resolve occurrences of "/../" in the normalized path
while (true) {
int index = normalized.indexOf("/../");
if (index < 0)
break;
if (index == 0)
return ("/"); // The only left path is the root.
int index2 = normalized.lastIndexOf('/', index - 1);
normalized = normalized.substring(0, index2) +
normalized.substring(index + 3);
}
// Resolve occurrences of "//" in the normalized path
while (true) {
int index = normalized.indexOf("//");
if (index < 0)
break;
normalized = normalized.substring(0, index) +
normalized.substring(index + 1);
}
// Return the normalized path that we have completed
return (normalized);
}
private static void handleException(Exception ex)
{
if (ex instanceof HttpException) {
if (((HttpException) ex).getReasonCode() ==
HttpStatus.SC_METHOD_NOT_ALLOWED) {
out.println("Warning: Not WebDAV-enabled?");
}
else if (((HttpException) ex).getReasonCode() ==
HttpStatus.SC_UNAUTHORIZED) {
out.println("Warning: Unauthorized");
}
else {
out.println("Warning: " + ex.getMessage());
}
}
else if (ex instanceof IOException) {
out.println("Error: " + ex.getMessage());
}
else {
out.println("Fatal Error: " + ex.getMessage());
ex.printStackTrace(out);
out.println("Please, email to [EMAIL PROTECTED]");
System.exit(-1);
}
}
public static void main(String[] args){
init();
connect("http://137.189.94.70:8080/slide";);
disconnect();
}
}
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