| /* |
| * 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.airavata.mft.transport.scp; |
| |
| import com.jcraft.jsch.Channel; |
| import com.jcraft.jsch.ChannelExec; |
| import com.jcraft.jsch.Session; |
| import org.apache.airavata.mft.core.api.ConnectorConfig; |
| import org.apache.airavata.mft.core.api.IncomingStreamingConnector; |
| import org.apache.airavata.mft.credential.stubs.scp.SCPSecret; |
| import org.apache.airavata.mft.resource.stubs.scp.storage.SCPStorage; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| public final class SCPIncomingConnector implements IncomingStreamingConnector { |
| |
| private static final Logger logger = LoggerFactory.getLogger(SCPIncomingConnector.class); |
| |
| private Session session; |
| private Channel channel; |
| private OutputStream out; |
| private InputStream in; |
| private final byte[] buf = new byte[1024]; |
| private String resourcePath; |
| |
| @Override |
| public void init(ConnectorConfig cc) throws Exception { |
| |
| SCPStorage scpStorage = cc.getStorage().getScp(); |
| |
| this.resourcePath = cc.getResourcePath(); |
| |
| SCPSecret scpSecret = cc.getSecret().getScp(); |
| |
| logger.info("Creating a ssh session for {}@{}:{}", scpSecret.getUser(), scpStorage.getHost(), scpStorage.getPort()); |
| |
| this.session = SCPTransportUtil.createSession( |
| scpSecret.getUser(), |
| scpStorage.getHost(), |
| scpStorage.getPort(), |
| scpSecret.getPrivateKey().getBytes(), |
| scpSecret.getPublicKey().equals("")? null : scpSecret.getPublicKey().getBytes(), |
| scpSecret.getPassphrase().equals("")? null : scpSecret.getPassphrase().getBytes()); |
| |
| if (session == null) { |
| logger.error("Session can not be null. Make sure that SCP Receiver is properly initialized"); |
| throw new Exception("Session can not be null. Make sure that SCP Receiver is properly initialized"); |
| } |
| } |
| |
| private String escapeSpecialChars(String path) { |
| return path.replace(" ", "\\ "); |
| } |
| |
| @Override |
| public InputStream fetchInputStream() throws Exception { |
| return fetchInputStreamJCraft(escapeSpecialChars(resourcePath)); |
| } |
| |
| private InputStream fetchInputStreamJCraft(String resourcePath) throws Exception{ |
| String command = "scp -f " + resourcePath; |
| channel = session.openChannel("exec"); |
| ((ChannelExec) channel).setCommand(command); |
| |
| // get I/O streams for remote scp |
| out = channel.getOutputStream(); |
| in = channel.getInputStream(); |
| |
| channel.connect(); |
| |
| // send '\0' |
| buf[0] = 0; |
| out.write(buf, 0, 1); |
| out.flush(); |
| |
| while (true) { |
| int c = checkAck(in); |
| if (c != 'C' && c != 'c' ) { |
| break; |
| } |
| |
| // read '0644 ' |
| in.read(buf, 0, 5); |
| |
| long filesize = 0L; |
| while (true) { |
| if (in.read(buf, 0, 1) < 0) { |
| // error |
| break; |
| } |
| if (buf[0] == ' ') break; |
| filesize = filesize * 10L + (long) (buf[0] - '0'); |
| } |
| |
| String file = null; |
| for (int i = 0; ; i++) { |
| in.read(buf, i, 1); |
| if (buf[i] == (byte) 0x0a) { |
| file = new String(buf, 0, i); |
| break; |
| } |
| } |
| |
| logger.info("file-size=" + filesize + ", file=" + file); |
| // send '\0' |
| buf[0] = 0; |
| out.write(buf, 0, 1); |
| out.flush(); |
| |
| // read a content of lfile |
| return new LimitInputStream(in, filesize); |
| } |
| return null; |
| } |
| |
| @Override |
| public void complete() throws Exception { |
| if (checkAck(in) != 0) { |
| throw new IOException("Error code found in ack " + (checkAck(in))); |
| } |
| |
| // send '\0' |
| buf[0] = 0; |
| out.write(buf, 0, 1); |
| out.flush(); |
| |
| channel.disconnect(); |
| session.disconnect(); |
| } |
| |
| @Override |
| public void failed() throws Exception { |
| |
| } |
| |
| private int checkAck(InputStream in) throws IOException { |
| int b = in.read(); |
| // b may be 0 for success, |
| // 1 for error, |
| // 2 for fatal error, |
| // -1 |
| if (b == 0) return b; |
| if (b == -1) return b; |
| |
| if (b == 1 || b == 2) { |
| StringBuffer sb = new StringBuffer(); |
| int c; |
| do { |
| c = in.read(); |
| sb.append((char) c); |
| } |
| while (c != '\n'); |
| if (b == 1) { // error |
| logger.error("Check Ack Failure b = 1 " + sb.toString()); |
| } |
| if (b == 2) { // fatal error |
| logger.error("Check Ack Failure b = 2 " + sb.toString()); |
| } |
| } |
| return b; |
| } |
| } |