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WebDav Client in Java

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<dependency>
    <groupId>org.apache.jackrabbit</groupId>
    <artifactId>jackrabbit-webdav</artifactId>
    <version>1.6.0</version>
</dependency>

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URL;
import org.apache.commons.httpclient.Credentials;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.RequestEntity;
import org.apache.jackrabbit.webdav.client.methods.PutMethod;

...

// WebDAV URL:
final String baseUrl = ...;
// Source file to upload:
File f = ...;
try{
    HttpClient client = new HttpClient();
    Credentials creds = new UsernamePasswordCredentials("username", "password");
    client.getState().setCredentials(AuthScope.ANY, creds);

    PutMethod method = new PutMethod(baseUrl + "/" + f.getName());
    RequestEntity requestEntity = new InputStreamRequestEntity(
	    new FileInputStream(f));
    method.setRequestEntity(requestEntity);
    client.executeMethod(method);
    System.out.println(method.getStatusCode() + " " + method.getStatusText());
}
catch(HttpException ex){
    // Handle Exception
}
catch(IOException ex){
    // Handle Exception
}

4 Responses to 'WebDav Client in Java'

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1. Good example to upload a file. Could you please share an example to import a file also. I followed Jacakrabbit webdav wiki site and could able to get only the file list. How to get each file downloaded?

   Dilip

   12 Jun 09 at 9:00 am
2. I’ve created a new webdav client for Java that is quite a bit easier to use than jackrabbit. Basically, I’ve abstracted all the HttpClient stuff away and just expose a few easy to use methods for common use cases.

   It is called sardine and lives up on google code:

   http://code.google.com/p/sardine/

   Jon Stevens

   7 Jan 10 at 6:14 am
3. How to add progress bar to it for download. Can you put the entire buffer based approach using progress bar.
   I used other way, but can’t prevent double calling of uploadFile method..

   import java.io.File;
   import java.io.FileInputStream;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   import java.lang.reflect.InvocationTargetException;
   import java.net.URLConnection;
   import org.apache.commons.httpclient.methods.RequestEntity;
   import org.apache.jackrabbit.webdav.client.methods.PutMethod;
   import org.cord.client.shared.fileship.constants.FileshipConstants;
   import org.eclipse.core.runtime.IProgressMonitor;
   import org.eclipse.jface.dialogs.ProgressMonitorDialog;
   import org.eclipse.jface.operation.IRunnableWithProgress;
   import org.eclipse.swt.widgets.Display;

   public class FileUploadRequestEntity implements RequestEntity {
   public String remotePath;
   public String relativePath;
   private File file = null;
   PutMethod putMethod;
   public FileUploadRequestEntity(String s_relativePath,String s_RemotePath, String localFileName){
   super();
   this.file = new File(localFileName);
   this.relativePath =s_relativePath;
   this.remotePath =s_RemotePath;
   }

   public String getContentType() {
   String mimeType = URLConnection.guessContentTypeFromName(file.getName());

   if (mimeType == null) {
   mimeType = “application/octet-stream”;
   }
   return mimeType;
   //return “text/plain; charset=UTF-8″;
   }
   /**
   * writeRequest gets executed for every upload..
   * means when the HTTP client executes put method, below method actually passes
   * the data to server
   */
   public void writeRequest( OutputStream out) throws IOException {
   try {
   uploadFile(out);

   } catch (InvocationTargetException e) {
   e.printStackTrace();
   } catch (InterruptedException e) {
   e.printStackTrace();
   }
   }

   void uploadFile( final OutputStream out) throws IOException, InvocationTargetException, InterruptedException {
   final Display display = new Display();// this statement may throw error, since we do not know the activeshell and we need it below
   ProgressMonitorDialog dialog = new ProgressMonitorDialog(display.getActiveShell());
   final int fileSize = getFileSize();
   final MD5 md5 = new MD5(); // for hash
   dialog.run(true, true, new IRunnableWithProgress() {
   @Override
   public void run(IProgressMonitor monitor) {
   monitor.beginTask(“Upload status …”, fileSize);// note very large size may return more length .. need to see that
   InputStream fsInput;
   try {
   fsInput = new FileInputStream(file);
   int data;
   byte[] buffer = new byte[1024];
   long kbTransfered = 0;// number of kb transferred in 1 go

   while ((data = fsInput.read(buffer)) != -1) {
   if(monitor.isCanceled()) {
   monitor.done();
   return;
   }
   ++kbTransfered;
   monitor.subTask(getStatusMessage(kbTransfered));
   out.write(buffer, 0, data);
   monitor.worked(1);
   md5.update(buffer, data);
   }

   // adding hash value to uploaded file on jackrabbit server
   fsInput.close();
   out.flush(); /// very important

   monitor.subTask(“File uploaded successfully. Generating Hash”);
   WebDavEngine engine = WebDavEngine.getInstance();
   String s_FileHash = md5.getHashString();
   monitor.subTask(“File uploaded successfully. Now updating hash on server”);
   //engine.addProperties(relativePath, FileshipConstants.FILE_HASH_Key, s_FileHash);
   System.out.println(“File transferred successfully”);
   } catch (Exception e) {
   e.printStackTrace();
   }finally{
   monitor.done();
   }
   }
   });
   if (display!=null)display.dispose();
   }

   public long getContentLength() {
   return file.length();
   }

   // Handy methods that have no relation(or not required) for the methods to be implemented while subclassing RequestEntity
   /*************************
   */
   int getFileSize() {
   return (int) (file.length()/1024);// in KB
   }

   private void sleep(Integer waitTime) {
   try {
   Thread.sleep(waitTime);
   } catch (Throwable t) {
   System.out.println(“Wait time interrupted”);
   }
   }
   String getStatusMessage(long kbTransfered){
   long bytesTransfered = kbTransfered* 1024;
   long totalBytes = getContentLength();
   int percentUploaded = 0;
   if(totalBytes>0){
   percentUploaded = (int) (bytesTransfered * 100/ totalBytes);
   }

   return “Bytes uploaded: “+ bytesTransfered +” (” +percentUploaded + “%). Total Bytes : ” + totalBytes +
   ” Remaining: ” +(totalBytes – bytesTransfered) + ” Bytes” ;
   }

   @Override
   public boolean isRepeatable() {
   // TODO Auto-generated method stub
   return true;
   }

   // add more …

   /*************************
   */
   }

   Parvez Ahmad Hakim
   Srinagar Kashmir India

   Parvez Ahmad Hakim

   16 Jun 10 at 9:06 pm
4. Hello, how can we create a filedownload with jackrabbit??

   German

   22 Jul 10 at 9:49 pm

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