/*
* Copyright 2013 the original author or authors.
*
* Licensed 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.gradle.internal.resource.transport.sftp;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.SftpATTRS;
import org.gradle.internal.hash.HashValue;
import org.gradle.internal.resource.ExternalResource;
import org.gradle.internal.resource.PasswordCredentials;
import org.gradle.internal.resource.metadata.DefaultExternalResourceMetaData;
import org.gradle.internal.resource.metadata.ExternalResourceMetaData;
import org.gradle.internal.resource.transfer.ExternalResourceAccessor;
import java.io.IOException;
import java.net.URI;
public class SftpResourceAccessor implements ExternalResourceAccessor {
private final SftpClientFactory sftpClientFactory;
private final PasswordCredentials credentials;
public SftpResourceAccessor(SftpClientFactory sftpClientFactory, PasswordCredentials credentials) {
this.sftpClientFactory = sftpClientFactory;
this.credentials = credentials;
}
public ExternalResourceMetaData getMetaData(URI uri) throws IOException {
LockableSftpClient sftpClient = sftpClientFactory.createSftpClient(uri, credentials);
try {
SftpATTRS attributes = sftpClient.getSftpClient().lstat(uri.getPath());
return attributes != null ? toMetaData(uri, attributes) : null;
} catch (com.jcraft.jsch.SftpException e) {
if (e.id == ChannelSftp.SSH_FX_NO_SUCH_FILE) {
return null;
}
throw new SftpException(String.format("Could not get resource '%s'.", uri), e);
} finally {
sftpClientFactory.releaseSftpClient(sftpClient);
}
}
private ExternalResourceMetaData toMetaData(URI uri, SftpATTRS attributes) {
long lastModified = -1;
long contentLength = -1;
if ((attributes.getFlags() & SftpATTRS.SSH_FILEXFER_ATTR_ACMODTIME) != 0) {
lastModified = attributes.getMTime() * 1000;
}
if ((attributes.getFlags() & SftpATTRS.SSH_FILEXFER_ATTR_SIZE) != 0) {
contentLength = attributes.getSize();
}
return new DefaultExternalResourceMetaData(uri, lastModified, contentLength, null, null);
}
public ExternalResource getResource(URI location) throws IOException {
ExternalResourceMetaData metaData = getMetaData(location);
return metaData != null ? new SftpResource(sftpClientFactory, metaData, location, credentials) : null;
}
public HashValue getResourceSha1(URI location) {
return null;
}
}