| /* |
| * 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.ChannelExec; |
| import com.jcraft.jsch.Session; |
| import org.apache.airavata.mft.core.ConnectorContext; |
| import org.apache.airavata.mft.core.DoubleStreamingBuffer; |
| import org.apache.airavata.mft.core.ResourceTypes; |
| import org.apache.airavata.mft.core.api.Connector; |
| import org.apache.airavata.mft.credential.stubs.scp.SCPSecret; |
| import org.apache.airavata.mft.credential.stubs.scp.SCPSecretGetRequest; |
| import org.apache.airavata.mft.resource.client.ResourceServiceClient; |
| import org.apache.airavata.mft.resource.client.ResourceServiceClientBuilder; |
| import org.apache.airavata.mft.resource.stubs.scp.resource.SCPResource; |
| import org.apache.airavata.mft.resource.stubs.scp.resource.SCPResourceGetRequest; |
| import org.apache.airavata.mft.secret.client.SecretServiceClient; |
| import org.apache.airavata.mft.secret.client.SecretServiceClientBuilder; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.*; |
| |
| public class SCPReceiver implements Connector { |
| |
| private static final Logger logger = LoggerFactory.getLogger(SCPReceiver.class); |
| |
| boolean initialized = false; |
| |
| private Session session; |
| private SCPResource scpResource; |
| |
| public void init(String resourceId, String credentialToken, String resourceServiceHost, int resourceServicePort, |
| String secretServiceHost, int secretServicePort) throws Exception { |
| |
| this.initialized = true; |
| |
| ResourceServiceClient resourceClient = ResourceServiceClientBuilder.buildClient(resourceServiceHost, resourceServicePort); |
| this.scpResource = resourceClient.scp().getSCPResource(SCPResourceGetRequest.newBuilder().setResourceId(resourceId).build()); |
| |
| SecretServiceClient secretClient = SecretServiceClientBuilder.buildClient(secretServiceHost, secretServicePort); |
| SCPSecret scpSecret = secretClient.scp().getSCPSecret(SCPSecretGetRequest.newBuilder().setSecretId(credentialToken).build()); |
| |
| this.session = SCPTransportUtil.createSession( |
| scpResource.getScpStorage().getUser(), |
| scpResource.getScpStorage().getHost(), |
| scpResource.getScpStorage().getPort(), |
| scpSecret.getPrivateKey().getBytes(), |
| scpSecret.getPublicKey().getBytes(), |
| scpSecret.getPassphrase().equals("")? null : scpSecret.getPassphrase().getBytes()); |
| } |
| |
| public void destroy() { |
| |
| } |
| |
| private void checkInitialized() { |
| if (!initialized) { |
| throw new IllegalStateException("SCP Receiver is not initialized"); |
| } |
| } |
| |
| public void startStream(ConnectorContext context) throws Exception { |
| checkInitialized(); |
| 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"); |
| } |
| |
| if (ResourceTypes.FILE.equals(this.scpResource.getResourceCase().name())) { |
| transferRemoteToStream(session, this.scpResource.getFile().getResourcePath(), context.getStreamBuffer()); |
| logger.info("SCP Receive completed. Transfer {}", context.getTransferId()); |
| |
| } else { |
| logger.error("Resource {} should be a FILE type. Found a {}", |
| this.scpResource.getResourceId(), this.scpResource.getResourceCase().name()); |
| throw new Exception("Resource " + this.scpResource.getResourceId() + " should be a FILE type. Found a " + |
| this.scpResource.getResourceCase().name()); |
| } |
| } |
| |
| private void transferRemoteToStream(Session session, String from, DoubleStreamingBuffer streamBuffer) throws Exception { |
| |
| try { |
| OutputStream outputStream = streamBuffer.getOutputStream(); |
| |
| logger.info("Starting scp receive"); |
| // exec 'scp -f rfile' remotely |
| String command = "scp -f " + from; |
| com.jcraft.jsch.Channel channel = session.openChannel("exec"); |
| ((ChannelExec) channel).setCommand(command); |
| |
| // get I/O streams for remote scp |
| OutputStream out = channel.getOutputStream(); |
| InputStream in = channel.getInputStream(); |
| |
| channel.connect(); |
| |
| byte[] buf = new byte[1024]; |
| |
| // send '\0' |
| buf[0] = 0; |
| out.write(buf, 0, 1); |
| out.flush(); |
| |
| while (true) { |
| int c = checkAck(in); |
| if (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 |
| int bufSize; |
| while (true) { |
| if (buf.length < filesize) bufSize = buf.length; |
| else bufSize = (int) filesize; |
| bufSize = in.read(buf, 0, bufSize); |
| if (bufSize < 0) { |
| // error |
| break; |
| } |
| //System.out.println("Read " + bufSize); |
| outputStream.write(buf, 0, bufSize); |
| outputStream.flush(); |
| |
| filesize -= bufSize; |
| if (filesize == 0L) break; |
| } |
| |
| 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(); |
| outputStream.close(); |
| } |
| |
| channel.disconnect(); |
| session.disconnect(); |
| |
| } finally { |
| try { |
| session.disconnect(); |
| } catch (Exception e) { |
| logger.warn("Session disconnection failed", e); |
| } |
| } |
| |
| } |
| |
| public 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 |
| System.out.print(sb.toString()); |
| } |
| if (b == 2) { // fatal error |
| System.out.print(sb.toString()); |
| } |
| } |
| return b; |
| } |
| } |