NIFI-1416: If FetchSFTP's Remote File has a directory name in it, do not include that as part of the 'filename' attribute but instead add a 'path' attribute

Signed-off-by: Aldrin Piri <aldrin@apache.org>

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/FetchFileTransfer.java

@@ -274,7 +274,15 @@ public abstract class FetchFileTransfer extends AbstractProcessor {
         attributes.put(protocolName + ".remote.host", host);
         attributes.put(protocolName + ".remote.port", String.valueOf(port));
         attributes.put(protocolName + ".remote.filename", filename);
+
+        if (filename.contains("/")) {
+            final String path = StringUtils.substringBeforeLast(filename, "/");
+            final String filenameOnly = StringUtils.substringAfterLast(filename, "/");
+            attributes.put(CoreAttributes.PATH.key(), path);
+            attributes.put(CoreAttributes.FILENAME.key(), filenameOnly);
+        } else {
             attributes.put(CoreAttributes.FILENAME.key(), filename);
+        }
         flowFile = session.putAllAttributes(flowFile, attributes);
 
         // emit provenance event and transfer FlowFile

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/FetchSFTP.java

@@ -46,6 +46,7 @@ import org.apache.nifi.processors.standard.util.SFTPTransfer;
     @WritesAttribute(attribute = "sftp.remote.port", description = "The port that was used to communicate with the remote SFTP server"),
     @WritesAttribute(attribute = "sftp.remote.filename", description = "The name of the remote file that was pulled"),
     @WritesAttribute(attribute = "filename", description = "The filename is updated to point to the filename fo the remote file"),
+    @WritesAttribute(attribute = "path", description = "If the Remote File contains a directory name, that directory name will be added to the FlowFile using the 'path' attribute")
 })
 public class FetchSFTP extends FetchFileTransfer {
 

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestFetchFileTransfer.java

@@ -31,10 +31,12 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
 import org.apache.nifi.processor.ProcessContext;
 import org.apache.nifi.processors.standard.util.FileInfo;
 import org.apache.nifi.processors.standard.util.FileTransfer;
 import org.apache.nifi.processors.standard.util.PermissionDeniedException;
+import org.apache.nifi.util.MockFlowFile;
 import org.apache.nifi.util.TestRunner;
 import org.apache.nifi.util.TestRunners;
 import org.junit.Test;
@@ -60,6 +62,30 @@ public class TestFetchFileTransfer {
         runner.getFlowFilesForRelationship(FetchFileTransfer.REL_SUCCESS).get(0).assertContentEquals("world");
     }
 
+    @Test
+    public void testFilenameContainsPath() {
+        final String filenameWithPath = "./here/is/my/path/hello.txt";
+
+        final TestableFetchFileTransfer proc = new TestableFetchFileTransfer();
+        final TestRunner runner = TestRunners.newTestRunner(proc);
+        runner.setProperty(FetchFileTransfer.HOSTNAME, "localhost");
+        runner.setProperty(FetchFileTransfer.UNDEFAULTED_PORT, "11");
+        runner.setProperty(FetchFileTransfer.REMOTE_FILENAME, "${filename}");
+
+        proc.addContent(filenameWithPath, "world".getBytes());
+        final Map<String, String> attrs = new HashMap<>();
+        attrs.put("filename", filenameWithPath);
+        runner.enqueue(new byte[0], attrs);
+
+        runner.run(1, false, false);
+        runner.assertAllFlowFilesTransferred(FetchFileTransfer.REL_SUCCESS, 1);
+        assertFalse(proc.closed);
+        MockFlowFile transferredFlowFile = runner.getFlowFilesForRelationship(FetchFileTransfer.REL_SUCCESS).get(0);
+        transferredFlowFile.assertContentEquals("world");
+        transferredFlowFile.assertAttributeExists(CoreAttributes.PATH.key());
+        transferredFlowFile.assertAttributeEquals(CoreAttributes.PATH.key(), "./here/is/my/path");
+    }
+
     @Test
     public void testContentNotFound() {
         final TestableFetchFileTransfer proc = new TestableFetchFileTransfer();