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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.util.ArrayList;
import java.util.List;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.file.GenericFile;
import org.apache.camel.component.file.GenericFileOperationFailedException;
import org.apache.camel.util.FileUtil;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.URISupport;
import org.apache.commons.net.ftp.FTPFile;
/**
* FTP consumer
*/
public class FtpConsumer extends RemoteFileConsumer {
protected String endpointPath;
private transient String ftpConsumerToString;
public FtpConsumer(RemoteFileEndpoint endpoint, Processor processor, RemoteFileOperations fileOperations) {
super(endpoint, processor, fileOperations);
this.endpointPath = endpoint.getConfiguration().getDirectory();
}
@Override
protected void doStart() throws Exception {
// turn off scheduler first, so autoCreate is handled before scheduler starts
boolean startScheduler = isStartScheduler();
setStartScheduler(false);
try {
super.doStart();
if (endpoint.isAutoCreate()) {
log.debug("Auto creating directory: {}", endpoint.getConfiguration().getDirectory());
try {
connectIfNecessary();
operations.buildDirectory(endpoint.getConfiguration().getDirectory(), true);
} catch (GenericFileOperationFailedException e) {
// log a WARN as we want to start the consumer.
log.warn("Error auto creating directory: " + endpoint.getConfiguration().getDirectory()
+ " due " + e.getMessage() + ". This exception is ignored.", e);
}
}
} finally {
if (startScheduler) {
setStartScheduler(true);
startScheduler();
}
}
}
@Override
protected boolean pollDirectory(String fileName, List> fileList, int depth) {
String currentDir = null;
if (isStepwise()) {
// must remember current dir so we stay in that directory after the poll
currentDir = operations.getCurrentDirectory();
}
// strip trailing slash
fileName = FileUtil.stripTrailingSeparator(fileName);
boolean answer = doPollDirectory(fileName, null, fileList, depth);
if (currentDir != null) {
operations.changeCurrentDirectory(currentDir);
}
return answer;
}
protected boolean pollSubDirectory(String absolutePath, String dirName, List> fileList, int depth) {
boolean answer = doSafePollSubDirectory(absolutePath, dirName, fileList, depth);
// change back to parent directory when finished polling sub directory
if (isStepwise()) {
operations.changeToParentDirectory();
}
return answer;
}
protected boolean doPollDirectory(String absolutePath, String dirName, List> fileList, int depth) {
log.trace("doPollDirectory from absolutePath: {}, dirName: {}", absolutePath, dirName);
depth++;
// remove trailing /
dirName = FileUtil.stripTrailingSeparator(dirName);
// compute dir depending on stepwise is enabled or not
String dir;
if (isStepwise()) {
dir = ObjectHelper.isNotEmpty(dirName) ? dirName : absolutePath;
operations.changeCurrentDirectory(dir);
} else {
dir = absolutePath;
}
log.trace("Polling directory: {}", dir);
List files = null;
if (isUseList()) {
if (isStepwise()) {
files = operations.listFiles();
} else {
files = operations.listFiles(dir);
}
} else {
// we cannot use the LIST command(s) so we can only poll a named file
// so created a pseudo file with that name
FTPFile file = new FTPFile();
file.setType(FTPFile.FILE_TYPE);
fileExpressionResult = evaluateFileExpression();
if (fileExpressionResult != null) {
file.setName(fileExpressionResult);
files = new ArrayList(1);
files.add(file);
}
}
if (files == null || files.isEmpty()) {
// no files in this directory to poll
log.trace("No files found in directory: {}", dir);
return true;
} else {
// we found some files
log.trace("Found {} in directory: {}", files.size(), dir);
}
for (FTPFile file : files) {
if (log.isTraceEnabled()) {
log.trace("FtpFile[name={}, dir={}, file={}]", new Object[]{file.getName(), file.isDirectory(), file.isFile()});
}
// check if we can continue polling in files
if (!canPollMoreFiles(fileList)) {
return false;
}
if (file.isDirectory()) {
RemoteFile remote = asRemoteFile(absolutePath, file, getEndpoint().getCharset());
if (endpoint.isRecursive() && depth < endpoint.getMaxDepth() && isValidFile(remote, true, files)) {
// recursive scan and add the sub files and folders
String subDirectory = file.getName();
String path = absolutePath + "/" + subDirectory;
boolean canPollMore = pollSubDirectory(path, subDirectory, fileList, depth);
if (!canPollMore) {
return false;
}
}
} else if (file.isFile()) {
RemoteFile remote = asRemoteFile(absolutePath, file, getEndpoint().getCharset());
if (depth >= endpoint.getMinDepth() && isValidFile(remote, false, files)) {
// matched file so add
fileList.add(remote);
}
} else {
log.debug("Ignoring unsupported remote file type: " + file);
}
}
return true;
}
@Override
protected boolean isMatched(GenericFile file, String doneFileName, List files) {
String onlyName = FileUtil.stripPath(doneFileName);
for (FTPFile f : files) {
if (f.getName().equals(onlyName)) {
return true;
}
}
log.trace("Done file: {} does not exist", doneFileName);
return false;
}
@Override
protected boolean ignoreCannotRetrieveFile(String name, Exchange exchange, Exception cause) {
if (getEndpoint().getConfiguration().isIgnoreFileNotFoundOrPermissionError()) {
if (exchange != null) {
// error code 550 is file not found
int code = exchange.getIn().getHeader(FtpConstants.FTP_REPLY_CODE, 0, int.class);
if (code == 550) {
return true;
}
}
if (cause != null && cause instanceof GenericFileOperationFailedException) {
GenericFileOperationFailedException generic = ObjectHelper.getException(GenericFileOperationFailedException.class, cause);
//exchange is null and cause has the reason for failure to read directories
if (generic.getCode() == 550) {
return true;
}
}
}
return super.ignoreCannotRetrieveFile(name, exchange, cause);
}
private RemoteFile asRemoteFile(String absolutePath, FTPFile file, String charset) {
RemoteFile answer = new RemoteFile();
answer.setCharset(charset);
answer.setEndpointPath(endpointPath);
answer.setFile(file);
answer.setFileNameOnly(file.getName());
answer.setFileLength(file.getSize());
answer.setDirectory(file.isDirectory());
if (file.getTimestamp() != null) {
answer.setLastModified(file.getTimestamp().getTimeInMillis());
}
answer.setHostname(((RemoteFileConfiguration) endpoint.getConfiguration()).getHost());
// absolute or relative path
boolean absolute = FileUtil.hasLeadingSeparator(absolutePath);
answer.setAbsolute(absolute);
// create a pseudo absolute name
String dir = FileUtil.stripTrailingSeparator(absolutePath);
String absoluteFileName = FileUtil.stripLeadingSeparator(dir + "/" + file.getName());
// if absolute start with a leading separator otherwise let it be relative
if (absolute) {
absoluteFileName = "/" + absoluteFileName;
}
answer.setAbsoluteFilePath(absoluteFileName);
// the relative filename, skip the leading endpoint configured path
String relativePath = ObjectHelper.after(absoluteFileName, endpointPath);
// skip leading /
relativePath = FileUtil.stripLeadingSeparator(relativePath);
answer.setRelativeFilePath(relativePath);
// the file name should be the relative path
answer.setFileName(answer.getRelativeFilePath());
return answer;
}
private boolean isStepwise() {
RemoteFileConfiguration config = (RemoteFileConfiguration) endpoint.getConfiguration();
return config.isStepwise();
}
private boolean isUseList() {
RemoteFileConfiguration config = (RemoteFileConfiguration) endpoint.getConfiguration();
return config.isUseList();
}
@Override
public String toString() {
if (ftpConsumerToString == null) {
ftpConsumerToString = "FtpConsumer[" + URISupport.sanitizeUri(getEndpoint().getEndpointUri()) + "]";
}
return ftpConsumerToString;
}
}
