How to copy file from smb share to local drive using jcifs in Java?

Question

Could anybody help me to copy file from shared folder to local drive? My code is:

import jcifs.smb.NtlmPasswordAuthentication;
import jcifs.smb.SmbFile;
import jcifs.smb.SmbFileInputStream;
import jcifs.smb.SmbFileOutputStream;;


public class smb {

      /**
      * @param args
      * @throws IOException
       */
      public static void main(String[] args) throws IOException {
            // TODO Auto-generated method stub


          String urlToBackUpFile = "smb://ip/backup$/test.txt"; 
          System.out.println("smb folder of source file" + urlToBackUpFile);
          NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(null, "login", "pass");


            SmbFile dir = new SmbFile(urlToBackUpFile, auth);
            System.out.println(dir.getDate());
            SmbFile dest = new SmbFile ("C:/SQLRESTORESTAGE/v2.bak");
            dir.copyTo(dest);
      }
}

File file is not copied. I received a message "Failed to connect to server", but the programm shows dir.getDate() (and file name, and lenght) of source file. So I think the problem with destination folder (C:/SQLRESTORESTAGE/). Also I have proviledges only for reading source file. Could you help me to cirrect the code or advise something? Thank you.

Answer 1

maybe adding auth to the second file:

SmbFile dest = new SmbFile ("C:/SQLRESTORESTAGE/v2.bak",**auth**);

using SmbFile dest = new SmbFile ("C:/SQLRESTORESTAGE",auth).canWrite you know if you have write permissions on the parent directory

Answer 2

After many trials and failures the only method that worked for me reliably was to go old school and use FileInputStream and FileOutputStream like so:

   `SmbFile[] files = getSMBListOfFiles(sb, logger, domain, userName, password, sourcePath, sourcePattern);

    if (files == null)
        return false;
    output(sb, logger, "      Source file count: " + files.length);
    String destFilename;
    FileOutputStream fileOutputStream;
    InputStream fileInputStream;
    byte[] buf;
    int len;
    for (SmbFile smbFile: files) {
        destFilename = destinationPath + smbFile.getName();
        output(sb, logger, "         copying " + smbFile.getName());
        try {
            fileOutputStream = new FileOutputStream(destFilename);
            fileInputStream = smbFile.getInputStream();
            buf = new byte[16 * 1024 * 1024];
            while ((len = fileInputStream.read(buf)) > 0) {
                fileOutputStream.write(buf, 0, len);
            }
            fileInputStream.close();
            fileOutputStream.close();
        } catch (SmbException e) {
            OutputHandler.output(sb, logger, "Exception during copyNetworkFilesToLocal stream to output, SMP issue: " + e.getMessage(), e);
            e.printStackTrace();
            return false;
        } catch (FileNotFoundException e) {
            OutputHandler.output(sb, logger, "Exception during copyNetworkFilesToLocal stream to output, file not found: " + e.getMessage(), e);
            e.printStackTrace();
            return false;
        } catch (IOException e) {
            OutputHandler.output(sb, logger, "Exception during copyNetworkFilesToLocal stream to output, IO problem: " + e.getMessage(), e);
            e.printStackTrace();
            return false;
        }
    }`

Answer 3

I got it to work. I had to 'create' the destination file before doing the copy. try adding the middle line below into your original code-snippet and see if that works.

SmbFile dest = new SmbFile ("C:/SQLRESTORESTAGE/v2.bak");
dest.createNewFile();
dir.copyTo(dest);

Answer 4

This is for clarification. "Logon failure: unknown user name or bad password." can show for example when you use 1.3.18 but not in 1.2.25. it is probably because different compatibility settings:

1. jcifs.smb.lmCompatibility = 0 or 1: Send LM and NTLM 2)
2. jcifs.smb.lmCompatibility = 2: Send NTLM in both fields 3)
3. jcifs.smb.lmCompatibility = 3, 4, or 5: Send just LMv2

First way is to use it before NtlmPasswordAuthentication

jcifs.Config.setProperty( "jcifs.smb.lmCompatibility", "3");

It can resolve this issue.

Answer 5

you must use the file: protocol

SmbFile dest = new SmbFile ("file:" + "C:/SQLRESTORESTAGE/v2.bak");