Webdav

[Rish Gupta]

If anyone is familiar with the apache.webdav API please look into this.

package com.rxBatch;

import java.io.File;

import org.apache.commons.httpclient.HttpURL;
import org.apache.commons.httpclient.URIException;
import org.apache.webdav.ant.CollectionScanner;
import org.apache.webdav.ant.Scanner;
import org.apache.webdav.ant.WebdavFileSet;
import org.apache.webdav.ant.taskdefs.Copy;
import org.apache.webdav.ant.taskdefs.WebdavTask;


public class updateDirectory extends WebdavTask{

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		try {

		updateDirectory ud = new updateDirectory();
		CollectionScanner ds = new CollectionScanner();
		ud.setUserid("----");
		ud.setUrl("abcd");
		ud.setPassword("----");
		ud.setProxyAddress("x.x.x.x");
		//HttpURL url1 = new HttpURL("abcd");
		//ud.setProxyPort("80");
		//assureCollectionUrl(url1);
		
		
		String[] includes = {"**"};
		String[] excludes = {""};
		ds.setIncludes(includes);
		ds.setExcludes(excludes);
		ds.setBaseURL(ud.getUrl());
		ds.scan();

		System.out.println("FILES:");
		String[] files = ds.getIncludedFiles();
		for (int i = 0; i < files.length;i++) {
			System.out.println(files[i]);
			}
		
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		//File file = new File("https://files-cert.rxhub.net/webdav/");
		//WebdavFileSet wfs = new WebdavFileSet();
		//wfs.createInclude();
	}
		
}

this is the console:
FILES:
java.lang.NullPointerException
at org.apache.webdav.ant.CollectionScanner.readCollection(CollectionScanner.java:114)
at org.apache.webdav.ant.CollectionScanner.scan(CollectionScanner.java:86)
at com.rxBatch.updateDirectory.main(updateDirectory.java:40)

what am i doing wrong?

[Greg Charles]

Hmm, curious. It seems your error is coming from line 39 (not 40) of your listing, but that means it should never reach line 41, which is what prints out the "FILES" line. Did you change the code after you got the exception?

I found some source code here: http://www.jdocs.com/slideclient/2.1/org/apache/webdav/ant/CollectionScanner.html

It might be a different version from the one you're using, because it doesn't seem possible to NPE at line 114, but it would at line 111 because you haven't setHttpClient() to anything.

[Rish Gupta]

oh yeah! my bad, I did take out some extra commented stuff. I also added an http client.

package com.rxBatch;

import java.io.File;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpURL;
import org.apache.commons.httpclient.URIException;
import org.apache.webdav.ant.CollectionScanner;
import org.apache.webdav.ant.Scanner;
import org.apache.webdav.ant.WebdavFileSet;
import org.apache.webdav.ant.taskdefs.Copy;
import org.apache.webdav.ant.taskdefs.WebdavTask;


public class UpdateDirectory extends WebdavTask{

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		try {

		//Copy copy = new Copy();
			UpdateDirectory ud = new UpdateDirectory();
			
		HttpClient httpClient = new HttpClient();
		CollectionScanner ds = new CollectionScanner();
		ud.setUserid("user");
		ud.setUrl("https://xxxx/webdav/");
		ud.setPassword("pass");
		ud.setProxyAddress("x.x.x.x");
		
		//ud.setProxyPort("80");
		//assureCollectionUrl(url1);
		
		System.out.println("coneection thru");
		String[] includes = {"**"};
		String[] excludes = {""};
		ds.setIncludes(includes);
		ds.setExcludes(excludes);
		System.out.println("client set");
		ds.setHttpClient(httpClient);
		ds.setBaseURL(ud.getUrl());
		System.out.println("scanning");
		ds.scan();

		System.out.println("FILES:");
		String[] files = ds.getIncludedFiles();
		for (int i = 0; i < files.length;i++) {
			System.out.println(files[i]);
			}
		
		} catch (Exception e) {
			e.printStackTrace();
		}
		
//		File file = new File("https://files-cert.rxhub.net/webdav/");
//		WebdavFileSet wfs = new WebdavFileSet();
//		wfs.createInclude();
////		File[] file;
////		file = File[];
		
	
	}
		
}

Console says:
coneection thru
client set
scanning
Oct 5, 2011 4:57:03 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect
Oct 5, 2011 4:57:03 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: Retrying request
Oct 5, 2011 4:57:24 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect
Oct 5, 2011 4:57:24 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: Retrying request
Oct 5, 2011 4:57:45 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect
Oct 5, 2011 4:57:45 PM org.apache.commons.httpclient.HttpMethodDirector executeWithRetry
INFO: Retrying request
Can't read collection content! (java.net.ConnectException: Connection timed out: connect)
at org.apache.webdav.ant.Utils.makeBuildException(Utils.java:443)
at org.apache.webdav.ant.CollectionScanner.readCollection(CollectionScanner.java:117)
at org.apache.webdav.ant.CollectionScanner.scan(CollectionScanner.java:86)
at com.rxBatch.UpdateDirectory.main(UpdateDirectory.java:46)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:559)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:401)
at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:123)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:82)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:127)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at org.apache.webdav.ant.CollectionScanner.readCollection(CollectionScanner.java:114)
... 2 more
--- Nested Exception ---
java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:559)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:401)
at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:123)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:82)
at org.apache.commons.httpclient.protocol.SSLProtocolSocketFactory.createSocket(SSLProtocolSocketFactory.java:127)
at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707)
at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at org.apache.webdav.ant.CollectionScanner.readCollection(CollectionScanner.java:114)
at org.apache.webdav.ant.CollectionScanner.scan(CollectionScanner.java:86)
at com.rxBatch.UpdateDirectory.main(UpdateDirectory.java:46)
FILES:

[Rish Gupta]

I know all this info is kind of vague but i have never used this api before so please bear with me.

[Winston Gutkowski]

Greg Charles wrote:It might be a different version from the one you're using, because it doesn't seem possible to NPE at line 114, but it would at line 111 because you haven't setHttpClient() to anything.

Very bad piece of programming for a library class then; I'm surprised that Apache let something like that out the door.
To my mind, professional software should never produce undocumented NPEs...or at least not without a darn good message to go with it.

Winston

[Rish Gupta]

Tell me about it. I couldn't find any examples and not even any description of the methods. Thanks for looking into it though.
If you can, do suggest me a topic to look at because i don't even know where to begin with the error.