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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.component.file.remote;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.Socket;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.KeyPair;
import java.time.Duration;
import java.util.Base64;
import java.util.Hashtable;
import java.util.List;
import java.util.Vector;
import java.util.regex.Pattern;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Proxy;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.SocketFactory;
import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;
import org.apache.camel.Exchange;
import org.apache.camel.InvalidPayloadException;
import org.apache.camel.LoggingLevel;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.component.file.FileComponent;
import org.apache.camel.component.file.GenericFile;
import org.apache.camel.component.file.GenericFileEndpoint;
import org.apache.camel.component.file.GenericFileExist;
import org.apache.camel.component.file.GenericFileOperationFailedException;
import org.apache.camel.spi.CamelLogger;
import org.apache.camel.support.ResourceHelper;
import org.apache.camel.support.task.BlockingTask;
import org.apache.camel.support.task.Tasks;
import org.apache.camel.support.task.budget.Budgets;
import org.apache.camel.util.FileUtil;
import org.apache.camel.util.IOHelper;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.StopWatch;
import org.apache.camel.util.TimeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.camel.util.ObjectHelper.isNotEmpty;
/**
* SFTP remote file operations
*
* The JSCH session and channel are not thread-safe so we need to synchronize access to using this operation.
*/
public class SftpOperations implements RemoteFileOperations {
private static final Logger LOG = LoggerFactory.getLogger(SftpOperations.class);
private static final Pattern UP_DIR_PATTERN = Pattern.compile("/[^/]+");
private static final int OK_STATUS = 0;
private static final String OK_MESSAGE = "OK";
private Proxy proxy;
private SftpEndpoint endpoint;
private ChannelSftp channel;
private Session session;
private static class TaskPayload {
final RemoteFileConfiguration configuration;
private Exception exception;
public TaskPayload(RemoteFileConfiguration configuration) {
this.configuration = configuration;
}
}
public SftpOperations() {
}
public SftpOperations(Proxy proxy) {
this.proxy = proxy;
}
/**
* Extended user info which supports interactive keyboard mode, by entering the password.
*/
public interface ExtendedUserInfo extends UserInfo, UIKeyboardInteractive {
}
@Override
public void setEndpoint(GenericFileEndpoint endpoint) {
this.endpoint = (SftpEndpoint) endpoint;
}
@Override
public GenericFile newGenericFile() {
return new RemoteFile<>();
}
@Override
public synchronized boolean connect(RemoteFileConfiguration configuration, Exchange exchange)
throws GenericFileOperationFailedException {
if (isConnected()) {
// already connected
return true;
}
BlockingTask task = Tasks
.foregroundTask()
.withBudget(Budgets.iterationBudget()
.withMaxIterations(Budgets.atLeastOnce(endpoint.getMaximumReconnectAttempts()))
.withInterval(Duration.ofMillis(endpoint.getReconnectDelay()))
.build())
.build();
TaskPayload payload = new TaskPayload(configuration);
if (!task.run(this::tryConnect, payload)) {
throw new GenericFileOperationFailedException(
"Cannot connect to " + configuration.remoteServerInformation(),
payload.exception);
}
configureBulkRequests();
return true;
}
private boolean tryConnect(TaskPayload payload) {
if (LOG.isTraceEnabled()) {
LOG.trace("Reconnect attempt to {}", payload.configuration.remoteServerInformation());
}
try {
if (channel == null || !channel.isConnected()) {
if (session == null || !session.isConnected()) {
LOG.trace("Session isn't connected, trying to recreate and connect.");
session = createSession(payload.configuration);
if (endpoint.getConfiguration().getConnectTimeout() > 0) {
LOG.trace("Connecting use connectTimeout: {} ...", endpoint.getConfiguration().getConnectTimeout());
session.connect(endpoint.getConfiguration().getConnectTimeout());
} else {
LOG.trace("Connecting ...");
session.connect();
}
}
LOG.trace("Channel isn't connected, trying to recreate and connect.");
channel = (ChannelSftp) session.openChannel("sftp");
if (endpoint.getConfiguration().getFilenameEncoding() != null) {
Charset ch = Charset.forName(endpoint.getConfiguration().getFilenameEncoding());
LOG.trace("Using filename encoding: {}", ch);
channel.setFilenameEncoding(ch);
}
if (endpoint.getConfiguration().getConnectTimeout() > 0) {
LOG.trace("Connecting use connectTimeout: {} ...", endpoint.getConfiguration().getConnectTimeout());
channel.connect(endpoint.getConfiguration().getConnectTimeout());
} else {
LOG.trace("Connecting ...");
channel.connect();
}
if (LOG.isDebugEnabled()) {
LOG.debug("Connected to {}", payload.configuration.remoteServerInformation());
}
}
} catch (JSchException e) {
payload.exception = e;
return false;
}
return true;
}
private void configureBulkRequests() {
try {
tryConfigureBulkRequests();
} catch (JSchException e) {
throw new GenericFileOperationFailedException("Failed to configure number of bulk requests", e);
}
}
private void tryConfigureBulkRequests() throws JSchException {
Integer bulkRequests = endpoint.getConfiguration().getBulkRequests();
if (bulkRequests != null) {
LOG.trace("configuring channel to use up to {} bulk request(s)", bulkRequests);
channel.setBulkRequests(bulkRequests);
}
}
protected Session createSession(final RemoteFileConfiguration configuration) throws JSchException {
final JSch jsch = new JSch();
JSch.setLogger(new JSchLogger(endpoint.getConfiguration().getJschLoggingLevel()));
SftpConfiguration sftpConfig = (SftpConfiguration) configuration;
if (isNotEmpty(sftpConfig.getCiphers())) {
LOG.debug("Using ciphers: {}", sftpConfig.getCiphers());
Hashtable ciphers = new Hashtable<>();
ciphers.put("cipher.s2c", sftpConfig.getCiphers());
ciphers.put("cipher.c2s", sftpConfig.getCiphers());
JSch.setConfig(ciphers);
}
if (isNotEmpty(sftpConfig.getKeyExchangeProtocols())) {
LOG.debug("Using KEX: {}", sftpConfig.getKeyExchangeProtocols());
JSch.setConfig("kex", sftpConfig.getKeyExchangeProtocols());
}
if (isNotEmpty(sftpConfig.getPrivateKeyFile())) {
LOG.debug("Using private keyfile: {}", sftpConfig.getPrivateKeyFile());
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
jsch.addIdentity(sftpConfig.getPrivateKeyFile(), sftpConfig.getPrivateKeyPassphrase());
} else {
jsch.addIdentity(sftpConfig.getPrivateKeyFile());
}
}
if (sftpConfig.getPrivateKey() != null) {
LOG.debug("Using private key information from byte array");
byte[] passphrase = null;
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
passphrase = sftpConfig.getPrivateKeyPassphrase().getBytes(StandardCharsets.UTF_8);
}
jsch.addIdentity("ID", sftpConfig.getPrivateKey(), null, passphrase);
}
if (sftpConfig.getPrivateKeyUri() != null) {
LOG.debug("Using private key uri : {}", sftpConfig.getPrivateKeyUri());
byte[] passphrase = null;
if (isNotEmpty(sftpConfig.getPrivateKeyPassphrase())) {
passphrase = sftpConfig.getPrivateKeyPassphrase().getBytes(StandardCharsets.UTF_8);
}
try {
InputStream is = ResourceHelper.resolveMandatoryResourceAsInputStream(endpoint.getCamelContext(),
sftpConfig.getPrivateKeyUri());
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOHelper.copyAndCloseInput(is, bos);
jsch.addIdentity("ID", bos.toByteArray(), null, passphrase);
} catch (IOException e) {
throw new JSchException("Cannot read resource: " + sftpConfig.getPrivateKeyUri(), e);
}
}
if (sftpConfig.getKeyPair() != null) {
LOG.debug("Using private key information from key pair");
KeyPair keyPair = sftpConfig.getKeyPair();
if (keyPair.getPrivate() != null) {
// Encode the private key in PEM format for JSCH
StringBuilder sb = new StringBuilder(256);
sb.append("-----BEGIN PRIVATE KEY-----").append("\n");
sb.append(Base64.getEncoder().encodeToString(keyPair.getPrivate().getEncoded())).append("\n");
sb.append("-----END PRIVATE KEY-----").append("\n");
jsch.addIdentity("ID", sb.toString().getBytes(StandardCharsets.UTF_8), null, null);
} else {
LOG.warn("PrivateKey in the KeyPair must be filled");
}
}
if (isNotEmpty(sftpConfig.getKnownHostsFile())) {
LOG.debug("Using knownhosts file: {}", sftpConfig.getKnownHostsFile());
jsch.setKnownHosts(sftpConfig.getKnownHostsFile());
}
if (isNotEmpty(sftpConfig.getKnownHostsUri())) {
LOG.debug("Using known hosts uri: {}", sftpConfig.getKnownHostsUri());
try {
InputStream is = ResourceHelper.resolveMandatoryResourceAsInputStream(endpoint.getCamelContext(),
sftpConfig.getKnownHostsUri());
jsch.setKnownHosts(is);
} catch (IOException e) {
throw new JSchException("Cannot read resource: " + sftpConfig.getKnownHostsUri(), e);
}
}
if (sftpConfig.getKnownHosts() != null) {
LOG.debug("Using known hosts information from byte array");
jsch.setKnownHosts(new ByteArrayInputStream(sftpConfig.getKnownHosts()));
}
String knownHostsFile = sftpConfig.getKnownHostsFile();
if (knownHostsFile == null && sftpConfig.isUseUserKnownHostsFile()) {
knownHostsFile = System.getProperty("user.home") + "/.ssh/known_hosts";
LOG.info("Known host file not configured, using user known host file: {}", knownHostsFile);
}
if (ObjectHelper.isNotEmpty(knownHostsFile)) {
LOG.debug("Using known hosts information from file: {}", knownHostsFile);
jsch.setKnownHosts(knownHostsFile);
}
final Session session = jsch.getSession(configuration.getUsername(), configuration.getHost(), configuration.getPort());
if (isNotEmpty(sftpConfig.getStrictHostKeyChecking())) {
LOG.debug("Using StrictHostKeyChecking: {}", sftpConfig.getStrictHostKeyChecking());
session.setConfig("StrictHostKeyChecking", sftpConfig.getStrictHostKeyChecking());
}
session.setServerAliveInterval(sftpConfig.getServerAliveInterval());
session.setServerAliveCountMax(sftpConfig.getServerAliveCountMax());
// compression
if (sftpConfig.getCompression() > 0) {
LOG.debug("Using compression: {}", sftpConfig.getCompression());
session.setConfig("compression.s2c", "[email protected],zlib,none");
session.setConfig("compression.c2s", "[email protected],zlib,none");
session.setConfig("compression_level", Integer.toString(sftpConfig.getCompression()));
}
// set the PreferredAuthentications
if (sftpConfig.getPreferredAuthentications() != null) {
LOG.debug("Using PreferredAuthentications: {}", sftpConfig.getPreferredAuthentications());
session.setConfig("PreferredAuthentications", sftpConfig.getPreferredAuthentications());
}
// set the ServerHostKeys
if (sftpConfig.getServerHostKeys() != null) {
LOG.debug("Using ServerHostKeys: {}", sftpConfig.getServerHostKeys());
session.setConfig("server_host_key", sftpConfig.getServerHostKeys());
}
// set the PublicKeyAcceptedAlgorithms
if (sftpConfig.getPublicKeyAcceptedAlgorithms() != null) {
LOG.debug("Using PublicKeyAcceptedAlgorithms: {}", sftpConfig.getPublicKeyAcceptedAlgorithms());
session.setConfig("PubkeyAcceptedAlgorithms", sftpConfig.getPublicKeyAcceptedAlgorithms());
}
// set user information
session.setUserInfo(new ExtendedUserInfo() {
private final CamelLogger messageLogger
= new CamelLogger(LOG, ((SftpConfiguration) configuration).getServerMessageLoggingLevel());
public String getPassphrase() {
return null;
}
public String getPassword() {
return configuration.getPassword();
}
public boolean promptPassword(String s) {
return true;
}
public boolean promptPassphrase(String s) {
return true;
}
public boolean promptYesNo(String s) {
// are we prompted because the known host files does not exist, and asked whether to auto-create the file
boolean knownHostFile = s != null && s.endsWith("Are you sure you want to create it?");
if (knownHostFile && ((SftpConfiguration) configuration).isAutoCreateKnownHostsFile()) {
LOG.warn("Server asks for confirmation (yes|no): {}. Camel will answer yes.", s);
return true;
} else {
LOG.warn("Server asks for confirmation (yes|no): {}. Camel will answer no.", s);
// Return 'false' indicating modification of the hosts file is
// disabled.
return false;
}
}
public void showMessage(String s) {
messageLogger.log("FTP Server: " + s);
}
public String[] promptKeyboardInteractive(
String destination, String name, String instruction, String[] prompt, boolean[] echo) {
// must return an empty array if password is null
if (configuration.getPassword() == null) {
return new String[0];
} else {
return new String[] { configuration.getPassword() };
}
}
});
// set the SO_TIMEOUT for the time after the connect phase
if (sftpConfig.getServerAliveInterval() == 0) {
if (configuration.getSoTimeout() > 0) {
session.setTimeout(configuration.getSoTimeout());
}
} else {
LOG.debug(
"The Server Alive Internal is already set, the socket timeout won't be considered to avoid overidding the provided Server alive interval value");
}
// set proxy if configured
if (proxy != null) {
session.setProxy(proxy);
}
if (isNotEmpty(sftpConfig.getBindAddress())) {
session.setSocketFactory(new SocketFactory() {
@Override
public OutputStream getOutputStream(Socket socket) throws IOException {
return socket.getOutputStream();
}
@Override
public InputStream getInputStream(Socket socket) throws IOException {
return socket.getInputStream();
}
@Override
public Socket createSocket(String host, int port) throws IOException {
return createSocketUtil(host, port, sftpConfig.getBindAddress(), session.getTimeout());
}
});
}
return session;
}
private static final class JSchLogger implements com.jcraft.jsch.Logger {
private final LoggingLevel loggingLevel;
private JSchLogger(LoggingLevel loggingLevel) {
this.loggingLevel = loggingLevel;
}
@Override
public boolean isEnabled(int level) {
switch (level) {
case FATAL:
// use ERROR as FATAL
return loggingLevel.isEnabled(LoggingLevel.ERROR) && LOG.isErrorEnabled();
case ERROR:
return loggingLevel.isEnabled(LoggingLevel.ERROR) && LOG.isErrorEnabled();
case WARN:
return loggingLevel.isEnabled(LoggingLevel.WARN) && LOG.isWarnEnabled();
case INFO:
return loggingLevel.isEnabled(LoggingLevel.INFO) && LOG.isInfoEnabled();
default:
return loggingLevel.isEnabled(LoggingLevel.DEBUG) && LOG.isDebugEnabled();
}
}
@Override
public void log(int level, String message) {
switch (level) {
case FATAL:
// use ERROR as FATAL
LOG.error("JSCH -> {}", message);
break;
case ERROR:
LOG.error("JSCH -> {}", message);
break;
case WARN:
LOG.warn("JSCH -> {}", message);
break;
case INFO:
LOG.info("JSCH -> {}", message);
break;
default:
LOG.debug("JSCH -> {}", message);
break;
}
}
}
@Override
public synchronized boolean isConnected() throws GenericFileOperationFailedException {
return session != null && session.isConnected() && channel != null && channel.isConnected();
}
@Override
public synchronized void disconnect() throws GenericFileOperationFailedException {
if (session != null && session.isConnected()) {
session.disconnect();
}
if (channel != null && channel.isConnected()) {
channel.disconnect();
}
}
@Override
public synchronized void forceDisconnect() throws GenericFileOperationFailedException {
try {
if (session != null) {
session.disconnect();
}
if (channel != null) {
channel.disconnect();
}
} finally {
// ensure these
session = null;
channel = null;
}
}
private void reconnectIfNecessary(Exchange exchange) {
if (!isConnected()) {
connect(endpoint.getConfiguration(), exchange);
}
}
@Override
public synchronized boolean deleteFile(String name) throws GenericFileOperationFailedException {
LOG.debug("Deleting file: {}", name);
try {
reconnectIfNecessary(null);
channel.rm(name);
return true;
} catch (SftpException e) {
LOG.debug("Cannot delete file {}: {}", name, e.getMessage(), e);
throw new GenericFileOperationFailedException("Cannot delete file: " + name, e);
}
}
@Override
public synchronized boolean renameFile(String from, String to) throws GenericFileOperationFailedException {
LOG.debug("Renaming file: {} to: {}", from, to);
try {
reconnectIfNecessary(null);
// make use of the '/' separator because JSch expects this
// as the file separator even on Windows
to = FileUtil.compactPath(to, '/');
channel.rename(from, to);
return true;
} catch (SftpException e) {
LOG.debug("Cannot rename file from: {} to: {}", from, to, e);
throw new GenericFileOperationFailedException("Cannot rename file from: " + from + " to: " + to, e);
}
}
@Override
public synchronized boolean buildDirectory(String directory, boolean absolute) throws GenericFileOperationFailedException {
// must normalize directory first
directory = endpoint.getConfiguration().normalizePath(directory);
LOG.trace("buildDirectory({},{})", directory, absolute);
// ignore absolute as all dirs are relative with FTP
boolean success = false;
// whether to check for existing dir using CD or LS
boolean cdCheck = !this.endpoint.getConfiguration().isExistDirCheckUsingLs();
String originalDirectory = cdCheck ? getCurrentDirectory() : null;
try {
// maybe the full directory already exists
try {
if (cdCheck) {
channel.cd(directory);
} else {
// just do a fast listing
channel.ls(directory, entry -> ChannelSftp.LsEntrySelector.BREAK);
}
success = true;
} catch (SftpException e) {
// ignore, we could not change directory so try to create it
// instead
}
if (!success) {
LOG.debug("Trying to build remote directory: {}", directory);
try {
channel.mkdir(directory);
success = true;
} catch (SftpException e) {
// we are here if the server side doesn't create
// intermediate folders
// so create the folder one by one
success = buildDirectoryChunks(directory);
}
// only after successfully creating directory, we may set chmod on the file
if (success) {
chmodOfDirectory(directory);
}
}
} catch (SftpException e) {
throw new GenericFileOperationFailedException("Cannot build directory: " + directory, e);
} finally {
// change back to original directory
if (originalDirectory != null) {
changeCurrentDirectory(originalDirectory);
}
}
return success;
}
private boolean buildDirectoryChunks(String dirName) throws SftpException {
final StringBuilder sb = new StringBuilder(dirName.length());
final String[] dirs = dirName.split("/|\\\\");
boolean success = false;
boolean first = true;
for (String dir : dirs) {
if (first) {
first = false;
} else {
sb.append('/');
}
sb.append(dir);
// must normalize the directory name
String directory = endpoint.getConfiguration().normalizePath(sb.toString());
// do not try to build root folder (/ or \)
if (!(directory.equals("/") || directory.equals("\\"))) {
try {
LOG.trace("Trying to build remote directory by chunk: {}", directory);
channel.mkdir(directory);
success = true;
} catch (SftpException e) {
// ignore keep trying to create the rest of the path
}
// only after successfully creating directory, we may set chmod on the file
if (success) {
chmodOfDirectory(directory);
}
}
}
return success;
}
@Override
public synchronized String getCurrentDirectory() throws GenericFileOperationFailedException {
LOG.trace("getCurrentDirectory()");
try {
String answer = channel.pwd();
LOG.trace("Current dir: {}", answer);
return answer;
} catch (SftpException e) {
throw new GenericFileOperationFailedException("Cannot get current directory", e);
}
}
@Override
public synchronized void changeCurrentDirectory(String path) throws GenericFileOperationFailedException {
LOG.trace("changeCurrentDirectory({})", path);
if (ObjectHelper.isEmpty(path)) {
return;
}
// must compact path so SFTP server can traverse correctly, make use of
// the '/'
// separator because JSch expects this as the file separator even on
// Windows
String before = path;
char separatorChar = '/';
path = FileUtil.compactPath(path, separatorChar);
if (LOG.isTraceEnabled()) {
LOG.trace("Compacted path: {} -> {} using separator: {}", before, path, separatorChar);
}
// not stepwise should change directory in one operation
if (!endpoint.getConfiguration().isStepwise()) {
doChangeDirectory(path);
return;
}
if (getCurrentDirectory().startsWith(path)) {
// extract the path segment relative to the target path and make
// sure it keeps the preceding '/' for the regex op
String p = getCurrentDirectory().substring(path.length() - (path.endsWith("/") ? 1 : 0));
if (p.isEmpty()) {
return;
}
// the first character must be '/' and hence removed
path = UP_DIR_PATTERN.matcher(p).replaceAll("/..").substring(1);
}
// if it starts with the root path then a little special handling for
// that
if (FileUtil.hasLeadingSeparator(path)) {
// change to root path
if (!path.matches("^[a-zA-Z]:(//|\\\\).*$")) {
doChangeDirectory(path.substring(0, 1));
path = path.substring(1);
} else {
if (path.matches("^[a-zA-Z]:(//).*$")) {
doChangeDirectory(path.substring(0, 3));
path = path.substring(3);
} else if (path.matches("^[a-zA-Z]:(\\\\).*$")) {
doChangeDirectory(path.substring(0, 4));
path = path.substring(4);
}
}
}
// split into multiple dirs
final String[] dirs = path.split("/|\\\\");
if (dirs == null || dirs.length == 0) {
// path was just a relative single path
doChangeDirectory(path);
return;
}
// there are multiple dirs so do this in chunks
for (String dir : dirs) {
doChangeDirectory(dir);
}
}
private void doChangeDirectory(String path) {
if (path == null || ".".equals(path) || ObjectHelper.isEmpty(path)) {
return;
}
LOG.trace("Changing directory: {}", path);
try {
channel.cd(path);
} catch (SftpException e) {
throw new GenericFileOperationFailedException("Cannot change directory to: " + path, e);
}
}
@Override
public synchronized void changeToParentDirectory() throws GenericFileOperationFailedException {
LOG.trace("changeToParentDirectory()");
String current = getCurrentDirectory();
String parent = FileUtil.compactPath(current + "/..");
// must start with absolute
if (!parent.startsWith("/")) {
parent = "/" + parent;
}
changeCurrentDirectory(parent);
}
@Override
public synchronized SftpRemoteFile[] listFiles() throws GenericFileOperationFailedException {
return listFiles(".");
}
@Override
public synchronized SftpRemoteFile[] listFiles(String path) throws GenericFileOperationFailedException {
LOG.trace("Listing remote files from path {}", path);
if (ObjectHelper.isEmpty(path)) {
// list current directory if file path is not given
path = ".";
}
try {
Vector files = channel.ls(path);
return files.stream()
.map(f -> new SftpRemoteFileJCraft((ChannelSftp.LsEntry) f))
.toArray(SftpRemoteFileJCraft[]::new);
} catch (SftpException e) {
throw new GenericFileOperationFailedException("Cannot list directory: " + path, e);
}
}
@Override
public synchronized boolean retrieveFile(String name, Exchange exchange, long size)
throws GenericFileOperationFailedException {
LOG.trace("retrieveFile({})", name);
if (ObjectHelper.isNotEmpty(endpoint.getLocalWorkDirectory())) {
// local work directory is configured so we should store file
// content as files in this local directory
return retrieveFileToFileInLocalWorkDirectory(name, exchange);
} else {
// store file content directory as stream on the body
return retrieveFileToStreamInBody(name, exchange);
}
}
@Override
public synchronized void releaseRetrievedFileResources(Exchange exchange) throws GenericFileOperationFailedException {
InputStream is = exchange.getIn().getHeader(FtpConstants.REMOTE_FILE_INPUT_STREAM, InputStream.class);
if (is != null) {
try {
is.close();
} catch (IOException e) {
throw new GenericFileOperationFailedException(e.getMessage(), e);
}
}
}
@SuppressWarnings("unchecked")
private boolean retrieveFileToStreamInBody(String name, Exchange exchange) throws GenericFileOperationFailedException {
String currentDir = null;
try {
GenericFile target
= (GenericFile) exchange.getProperty(FileComponent.FILE_EXCHANGE_FILE);
ObjectHelper.notNull(target, "Exchange should have the " + FileComponent.FILE_EXCHANGE_FILE + " set");
String remoteName = name;
if (endpoint.getConfiguration().isStepwise()) {
// remember current directory
currentDir = getCurrentDirectory();
// change directory to path where the file is to be retrieved
// (must do this as some FTP servers cannot retrieve using
// absolute path)
String path = FileUtil.onlyPath(name);
if (path != null) {
changeCurrentDirectory(path);
}
// remote name is now only the file name as we just changed
// directory
remoteName = FileUtil.stripPath(name);
}
// use input stream which works with Apache SSHD used for testing
InputStream is = channel.get(remoteName);
if (endpoint.getConfiguration().isStreamDownload()) {
target.setBody(is);
exchange.getIn().setHeader(FtpConstants.REMOTE_FILE_INPUT_STREAM, is);
} else {
// read the entire file into memory in the byte array
ByteArrayOutputStream bos = new ByteArrayOutputStream();
IOHelper.copyAndCloseInput(is, bos);
// close the stream after done
IOHelper.close(bos);
target.setBody(bos.toByteArray());
}
createResultHeadersFromExchange(null, exchange);
return true;
} catch (SftpException e) {
createResultHeadersFromExchange(e, exchange);
throw new GenericFileOperationFailedException("Cannot retrieve file: " + name, e);
} catch (IOException e) {
throw new GenericFileOperationFailedException("Cannot retrieve file: " + name, e);
} finally {
// change back to current directory if we changed directory
if (currentDir != null) {
changeCurrentDirectory(currentDir);
}
}
}
@SuppressWarnings("unchecked")
private boolean retrieveFileToFileInLocalWorkDirectory(String name, Exchange exchange)
throws GenericFileOperationFailedException {
File temp;
File local = new File(endpoint.getLocalWorkDirectory());
OutputStream os;
GenericFile file
= (GenericFile) exchange.getProperty(FileComponent.FILE_EXCHANGE_FILE);
ObjectHelper.notNull(file, "Exchange should have the " + FileComponent.FILE_EXCHANGE_FILE + " set");
try {
// use relative filename in local work directory
String relativeName = file.getRelativeFilePath();
temp = new File(local, relativeName + ".inprogress");
local = new File(local, relativeName);
// create directory to local work file
local.mkdirs();
// delete any existing files
if (temp.exists()) {
if (!FileUtil.deleteFile(temp)) {
throw new GenericFileOperationFailedException("Cannot delete existing local work file: " + temp);
}
}
if (local.exists()) {
if (!FileUtil.deleteFile(local)) {
throw new GenericFileOperationFailedException("Cannot delete existing local work file: " + local);
}
}
// create new temp local work file
if (!temp.createNewFile()) {
throw new GenericFileOperationFailedException("Cannot create new local work file: " + temp);
}
// store content as a file in the local work directory in the temp
// handle
os = new FileOutputStream(temp);
// set header with the path to the local work file
exchange.getIn().setHeader(FtpConstants.FILE_LOCAL_WORK_PATH, local.getPath());
} catch (Exception e) {
throw new GenericFileOperationFailedException("Cannot create new local work file: " + local, e);
}
String currentDir = null;
try {
// store the java.io.File handle as the body
file.setBody(local);
String remoteName = name;
if (endpoint.getConfiguration().isStepwise()) {
// remember current directory
currentDir = getCurrentDirectory();
// change directory to path where the file is to be retrieved
// (must do this as some FTP servers cannot retrieve using
// absolute path)
String path = FileUtil.onlyPath(name);
if (path != null) {
changeCurrentDirectory(path);
}
// remote name is now only the file name as we just changed
// directory
remoteName = FileUtil.stripPath(name);
}
channel.get(remoteName, os);
} catch (SftpException e) {
createResultHeadersFromExchange(e, exchange);
LOG.trace("Error occurred during retrieving file: {} to local directory. Deleting local work file: {}", name, temp);
// failed to retrieve the file so we need to close streams and
// delete in progress file
// must close stream before deleting file
IOHelper.close(os, "retrieve: " + name, LOG);
boolean deleted = FileUtil.deleteFile(temp);
if (!deleted) {
LOG.warn("Error occurred during retrieving file: {} to local directory. Cannot delete local work file: {}",
name, temp);
}
throw new GenericFileOperationFailedException("Cannot retrieve file: " + name, e);
} finally {
IOHelper.close(os, "retrieve: " + name, LOG);
// change back to current directory if we changed directory
if (currentDir != null) {
changeCurrentDirectory(currentDir);
}
}
createResultHeadersFromExchange(null, exchange);
LOG.debug("Retrieve file to local work file result: true");
// operation went okay so rename temp to local after we have retrieved
// the data
LOG.trace("Renaming local in progress file from: {} to: {}", temp, local);
try {
if (!FileUtil.renameFile(temp, local, false)) {
throw new GenericFileOperationFailedException("Cannot rename local work file from: " + temp + " to: " + local);
}
} catch (IOException e) {
throw new GenericFileOperationFailedException("Cannot rename local work file from: " + temp + " to: " + local, e);
}
return true;
}
@Override
public synchronized boolean storeFile(String name, Exchange exchange, long size)
throws GenericFileOperationFailedException {
// must normalize name first
name = endpoint.getConfiguration().normalizePath(name);
LOG.trace("storeFile({})", name);
boolean answer;
String currentDir = null;
String path = FileUtil.onlyPath(name);
String targetName = name;
try {
if (path != null && endpoint.getConfiguration().isStepwise()) {
// must remember current dir so we stay in that directory after
// the write
currentDir = getCurrentDirectory();
// change to path of name
changeCurrentDirectory(path);
// the target name should be without path, as we have changed
// directory
targetName = FileUtil.stripPath(name);
}
// store the file
answer = doStoreFile(name, targetName, exchange);
} finally {
// change back to current directory if we changed directory
if (currentDir != null) {
changeCurrentDirectory(currentDir);
}
}
return answer;
}
private boolean doStoreFile(String name, String targetName, Exchange exchange) throws GenericFileOperationFailedException {
LOG.trace("doStoreFile({})", targetName);
// if an existing file already exists what should we do?
if (endpoint.getFileExist() == GenericFileExist.Ignore || endpoint.getFileExist() == GenericFileExist.Fail
|| endpoint.getFileExist() == GenericFileExist.Move) {
boolean existFile = existsFile(targetName);
if (existFile && endpoint.getFileExist() == GenericFileExist.Ignore) {
// ignore but indicate that the file was written
LOG.trace("An existing file already exists: {}. Ignore and do not override it.", name);
return true;
} else if (existFile && endpoint.getFileExist() == GenericFileExist.Fail) {
throw new GenericFileOperationFailedException("File already exist: " + name + ". Cannot write new file.");
} else if (existFile && endpoint.getFileExist() == GenericFileExist.Move) {
// move any existing file first
this.endpoint.getMoveExistingFileStrategy().moveExistingFile(endpoint, this, targetName);
}
}
InputStream is = null;
if (exchange.getIn().getBody() == null) {
// Do an explicit test for a null body and decide what to do
if (endpoint.isAllowNullBody()) {
LOG.trace("Writing empty file.");
is = new ByteArrayInputStream(new byte[] {});
} else {
throw new GenericFileOperationFailedException("Cannot write null body to file: " + name);
}
}
try {
if (is == null) {
String charset = endpoint.getCharset();
if (charset != null) {
// charset configured so we must convert to the desired
// charset so we can write with encoding
is = new ByteArrayInputStream(exchange.getIn().getMandatoryBody(String.class).getBytes(charset));
LOG.trace("Using InputStream {} with charset {}.", is, charset);
} else {
is = exchange.getIn().getMandatoryBody(InputStream.class);
}
}
final StopWatch watch = new StopWatch();
LOG.debug("About to store file: {} using stream: {}", targetName, is);
if (endpoint.getFileExist() == GenericFileExist.Append) {
LOG.trace("Client appendFile: {}", targetName);
channel.put(is, targetName, ChannelSftp.APPEND);
} else {
LOG.trace("Client storeFile: {}", targetName);
// override is default
channel.put(is, targetName);
}
if (LOG.isDebugEnabled()) {
long time = watch.taken();
LOG.debug("Took {} ({} millis) to store file: {} and FTP client returned: true",
TimeUtils.printDuration(time, true), time, targetName);
}
// after storing file, we may set chmod on the file
String mode = endpoint.getConfiguration().getChmod();
if (ObjectHelper.isNotEmpty(mode)) {
// parse to int using 8bit mode
int permissions = Integer.parseInt(mode, 8);
LOG.trace("Setting chmod: {} on file: {}", mode, targetName);
channel.chmod(permissions, targetName);
}
createResultHeadersFromExchange(null, exchange);
return true;
} catch (SftpException e) {
createResultHeadersFromExchange(e, exchange);
throw new GenericFileOperationFailedException("Cannot store file: " + name, e);
} catch (UnsupportedEncodingException | InvalidPayloadException e) {
throw new GenericFileOperationFailedException("Cannot store file: " + name, e);
} finally {
IOHelper.close(is, "store: " + name, LOG);
}
}
@Override
public synchronized boolean existsFile(String name) throws GenericFileOperationFailedException {
LOG.trace("existsFile({})", name);
if (endpoint.isFastExistsCheck()) {
return fastExistsFile(name);
}
// check whether a file already exists
String directory = FileUtil.onlyPath(name);
if (directory == null) {
// assume current dir if no path could be extracted
directory = ".";
}
String onlyName = FileUtil.stripPath(name);
try {
@SuppressWarnings("rawtypes")
List files = channel.ls(directory);
// can return either null or an empty list depending on FTP servers
if (files == null) {
return false;
}
for (Object file : files) {
ChannelSftp.LsEntry entry = (ChannelSftp.LsEntry) file;
String existing = entry.getFilename();
LOG.trace("Existing file: {}, target file: {}", existing, name);
existing = FileUtil.stripPath(existing);
if (existing != null && existing.equals(onlyName)) {
return true;
}
}
return false;
} catch (SftpException e) {
// or an exception can be thrown with id 2 which means file does not
// exists
if (ChannelSftp.SSH_FX_NO_SUCH_FILE == e.id) {
return false;
}
// otherwise its a more serious error so rethrow
throw new GenericFileOperationFailedException(e.getMessage(), e);
}
}
protected boolean fastExistsFile(String name) throws GenericFileOperationFailedException {
LOG.trace("fastExistsFile({})", name);
try {
@SuppressWarnings("rawtypes")
List files = channel.ls(name);
if (files == null) {
return false;
}
return !files.isEmpty();
} catch (SftpException e) {
// or an exception can be thrown with id 2 which means file does not
// exists
if (ChannelSftp.SSH_FX_NO_SUCH_FILE == e.id) {
return false;
}
// otherwise its a more serious error so rethrow
throw new GenericFileOperationFailedException(e.getMessage(), e);
}
}
@Override
public synchronized boolean sendNoop() throws GenericFileOperationFailedException {
if (isConnected()) {
try {
session.sendKeepAliveMsg();
return true;
} catch (Exception e) {
LOG.debug("SFTP session was closed. Ignoring this exception.", e);
return false;
}
}
return false;
}
@Override
public synchronized boolean sendSiteCommand(String command) throws GenericFileOperationFailedException {
// is not implemented
return true;
}
/*
* adapted from com.jcraft.jsch.Util.createSocket(String, int, int) added
* possibility to specify the address of the local network interface,
* against the connection should bind
*/
static Socket createSocketUtil(final String host, final int port, final String bindAddress, final int timeout) {
Socket socket = null;
if (timeout == 0) {
try {
socket = new Socket(InetAddress.getByName(host), port, InetAddress.getByName(bindAddress), 0);
return socket;
} catch (Exception e) {
String message = e.toString();
throw new RuntimeCamelException(message, e);
}
}
final Socket[] sockp = new Socket[1];
final Exception[] ee = new Exception[1];
String message = "";
Thread tmp = new Thread(() -> {
sockp[0] = null;
try {
sockp[0] = new Socket(InetAddress.getByName(host), port, InetAddress.getByName(bindAddress), 0);
} catch (Exception e) {
ee[0] = e;
if (sockp[0] != null && sockp[0].isConnected()) {
IOHelper.close(sockp[0]);
}
sockp[0] = null;
}
});
tmp.setName("Opening Socket " + host);
tmp.start();
try {
tmp.join(timeout);
message = "timeout: ";
} catch (java.lang.InterruptedException eee) {
Thread.currentThread().interrupt();
}
if (sockp[0] != null && sockp[0].isConnected()) {
socket = sockp[0];
} else {
message += "socket is not established";
if (ee[0] != null) {
message = ee[0].toString();
}
tmp.interrupt();
throw new RuntimeCamelException(message, ee[0]);
}
return socket;
}
/**
* Helper method which gets result code and message from sftpException and puts it into header. In case that
* exception is null, it sets successfull response.
*/
private void createResultHeadersFromExchange(SftpException sftpException, Exchange exchange) {
// if exception is null, it means that result was ok
if (sftpException == null) {
exchange.getIn().setHeader(FtpConstants.FTP_REPLY_CODE, OK_STATUS);
exchange.getIn().setHeader(FtpConstants.FTP_REPLY_STRING, OK_MESSAGE);
} else {
// store client reply information after the operation
exchange.getIn().setHeader(FtpConstants.FTP_REPLY_CODE, sftpException.id);
exchange.getIn().setHeader(FtpConstants.FTP_REPLY_STRING, sftpException.getMessage());
}
}
/**
* Helper method which sets the path permissions
*/
private void chmodOfDirectory(String directory) {
String chmodDirectory = endpoint.getConfiguration().getChmodDirectory();
if (ObjectHelper.isNotEmpty(chmodDirectory)) {
LOG.trace("Setting permission: {} on directory: {}", chmodDirectory, directory);
// parse to int using 8bit mode
int permissions = Integer.parseInt(chmodDirectory, 8);
try {
channel.chmod(permissions, directory);
} catch (SftpException e) {
throw new GenericFileOperationFailedException("Cannot set permission on directory: " + directory, e);
}
}
}
}
