Java Code Examples for com.jcraft.jsch.ChannelSftp#stat()

private void createRemotePath(@NotNull final ChannelSftp channel,
                              @NotNull final String destination) throws SftpException {
  final int endIndex = destination.lastIndexOf('/');
  if (endIndex > 0) {
    createRemotePath(channel, destination.substring(0, endIndex));
  }
  try {
    channel.stat(destination);
  } catch (SftpException e) {
    // dir does not exist.
    if (e.id == ChannelSftp.SSH_FX_NO_SUCH_FILE) {
      channel.mkdir(destination);
    }
  }

}
 

@Override protected void getFileInfo(Session session)
    throws JSchException, UnsupportedEncodingException, SftpException {
  SFtpTaskOption option = (SFtpTaskOption) getWrapper().getTaskOption();
  ChannelSftp channel = (ChannelSftp) session.openChannel("sftp");
  channel.connect(1000);

  String remotePath = option.getUrlEntity().remotePath;
  String temp = CommonUtil.convertSFtpChar(getOption().getCharSet(), remotePath)
      + "/"
      + getWrapper().getEntity().getFileName();

  SftpATTRS attr = null;
  try {
    attr = channel.stat(temp);
  } catch (Exception e) {
    ALog.d(TAG, String.format("文件不存在，remotePath：%s", remotePath));
  }

  boolean isComplete = false;
  UploadEntity entity = getWrapper().getEntity();
  if (attr != null && attr.getSize() == entity.getFileSize()) {
    isComplete = true;
  }

  CompleteInfo info = new CompleteInfo();
  info.code = isComplete ? ISCOMPLETE : 200;
  info.obj = attr;
  channel.disconnect();
  callback.onSucceed(getWrapper().getKey(), info);
}
 

@Override protected void getFileInfo(Session session) throws JSchException,
    UnsupportedEncodingException, SftpException {
  SFtpTaskOption option = (SFtpTaskOption) getWrapper().getTaskOption();
  ChannelSftp channel = (ChannelSftp) session.openChannel("sftp");
  channel.connect(1000);

  //channel.setFilenameEncoding(option.getCharSet());
  //channel.setFilenameEncoding("gbk");

  String remotePath = option.getUrlEntity().remotePath;
  String temp = CommonUtil.convertSFtpChar(option.getCharSet(), remotePath);
  SftpATTRS attr = null;
  try {
    attr = channel.stat(temp);
  } catch (Exception e) {
    ALog.e(TAG, String.format("文件不存在，remotePath：%s", remotePath));
  }

  if (attr != null) {
    getWrapper().getEntity().setFileSize(attr.getSize());
    CompleteInfo info = new CompleteInfo();
    info.code = 200;
    callback.onSucceed(getWrapper().getKey(), info);
  } else {
    callback.onFail(getWrapper().getEntity(),
        new AriaSFTPException(String.format("文件不存在，remotePath：%s", remotePath)), false);
  }
  channel.disconnect();
}
 

private void mkdirs(String directory, ChannelSftp c) throws SftpException {
    try {
        SftpATTRS att = c.stat(directory);
        if (att != null && att.isDir()) {
            return;
        }
    } catch (SftpException ex) {
        if (directory.indexOf('/') != -1) {
            mkdirs(directory.substring(0, directory.lastIndexOf('/')), c);
        }
        c.mkdir(directory);
    }
}
 

@Override
public FileStatus getFileStatus(Path path) throws IOException {
  ChannelSftp channelSftp = null;
  ChannelExec channelExec1 = null;
  ChannelExec channelExec2 = null;
  try {
    channelSftp = this.fsHelper.getSftpChannel();
    SftpATTRS sftpAttrs = channelSftp.stat(HadoopUtils.toUriPath(path));
    FsPermission permission = new FsPermission((short) sftpAttrs.getPermissions());

    channelExec1 = this.fsHelper.getExecChannel("id " + sftpAttrs.getUId());
    String userName = IOUtils.toString(channelExec1.getInputStream());

    channelExec2 = this.fsHelper.getExecChannel("id " + sftpAttrs.getGId());
    String groupName = IOUtils.toString(channelExec2.getInputStream());

    FileStatus fs =
        new FileStatus(sftpAttrs.getSize(), sftpAttrs.isDir(), 1, 0l, sftpAttrs.getMTime(), sftpAttrs.getATime(),
            permission, StringUtils.trimToEmpty(userName), StringUtils.trimToEmpty(groupName), path);

    return fs;
  } catch (SftpException e) {
    throw new IOException(e);
  } finally {
    safeDisconnect(channelSftp);
    safeDisconnect(channelExec1);
    safeDisconnect(channelExec2);
  }

}
 

@Override
public StatInfo call() throws IOException, CancellationException, JSchException, ExecutionException, InterruptedException, SftpException {
    if (!path.startsWith("/")) { //NOI18N
        throw new FileNotFoundException("Path is not absolute: " + path); //NOI18N
    }
    StatInfo result = null;
    SftpException exception = null;
    if (LOG.isLoggable(Level.FINE)) {
        LOG.log(Level.FINE, "{0} started", getTraceName());
    }
    String threadName = Thread.currentThread().getName();
    Thread.currentThread().setName(PREFIX + ": " + getTraceName()); // NOI18N
    int attempt = 1;
    try {
        for (; attempt <= LS_RETRY_COUNT; attempt++) {
            ChannelSftp cftp = getChannel();
            RemoteStatistics.ActivityID activityID = RemoteStatistics.startChannelActivity("statload", path); // NOI18N
            try {
                SftpATTRS attrs = lstat ? cftp.lstat(path) : cftp.stat(path);
                String dirName, baseName;
                int slashPos = path.lastIndexOf('/');
                if (slashPos == 0) {
                    dirName = "";
                    baseName = path.substring(1);
                } else {
                    dirName = path.substring(0, slashPos);
                    baseName = path.substring(slashPos + 1);
                }
                result = createStatInfo(dirName, baseName, attrs, cftp);
                exception = null;
                break;
            } catch (SftpException e) {
                exception = e;
                if (e.id == SftpIOException.SSH_FX_FAILURE) {
                    if (LOG.isLoggable(Level.FINE)) {
                        LOG.log(Level.FINE, "{0} - exception while attempt {1}", new Object[]{getTraceName(), attempt});
                    }
                    if (MiscUtils.mightBrokeSftpChannel(e)) {
                        cftp.quit();
                    }
                } else {
                    // re-try in case of failure only
                    // otherwise consider this exception as unrecoverable
                    break;
                }
            } finally {
                RemoteStatistics.stopChannelActivity(activityID);
                releaseChannel(cftp);
            }
        }
    } finally {
        Thread.currentThread().setName(threadName);
    }

    if (exception != null) {
        if (LOG.isLoggable(Level.FINE)) {
            LOG.log(Level.FINE, "{0} failed", getTraceName());
        }
        throw decorateSftpException(exception, path);
    }

    if (LOG.isLoggable(Level.FINE)) {
        LOG.log(Level.FINE, "{0} finished in {1} attempt(s)", new Object[]{getTraceName(), attempt});
    }
    return result;
}
 

/**
 * Checks the existence for a remote file
 *
 * @param file
 *            to check
 * @param channel
 *            to use
 * @return true if file exists, false otherwise
 */
private boolean checkExistence(String file, ChannelSftp channel) {
    try {
        return channel.stat(file) != null;
    } catch (SftpException ex) {
        return false;
    }
}