Github user trixpan commented on a diff in the pull request:
https://github.com/apache/nifi/pull/483#discussion_r70283561
--- Diff:
nifi-nar-bundles/nifi-email-bundle/nifi-email-processors/src/main/java/org/apache/nifi/processors/email/ExtractEmailAttachments.java
---
@@ -0,0 +1,209 @@
+/*
+ * 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.nifi.processors.email;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+import java.util.Date;
+
+import javax.activation.DataSource;
+import javax.mail.Address;
+import javax.mail.MessagingException;
+import javax.mail.Session;
+import javax.mail.internet.MimeMessage;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.mail.util.MimeMessageParser;
+
+
+import org.apache.nifi.annotation.behavior.EventDriven;
+import org.apache.nifi.annotation.behavior.InputRequirement;
+import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
+import org.apache.nifi.annotation.behavior.SideEffectFree;
+import org.apache.nifi.annotation.behavior.SupportsBatching;
+import org.apache.nifi.annotation.behavior.WritesAttribute;
+import org.apache.nifi.annotation.behavior.WritesAttributes;
+import org.apache.nifi.annotation.documentation.CapabilityDescription;
+import org.apache.nifi.annotation.documentation.Tags;
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.flowfile.FlowFile;
+import org.apache.nifi.flowfile.attributes.CoreAttributes;
+import org.apache.nifi.logging.ComponentLog;
+import org.apache.nifi.processor.AbstractProcessor;
+import org.apache.nifi.processor.ProcessContext;
+import org.apache.nifi.processor.ProcessSession;
+import org.apache.nifi.processor.ProcessorInitializationContext;
+import org.apache.nifi.processor.Relationship;
+import org.apache.nifi.processor.exception.FlowFileHandlingException;
+import org.apache.nifi.processor.io.InputStreamCallback;
+import org.apache.nifi.processor.io.OutputStreamCallback;
+import org.apache.nifi.stream.io.BufferedInputStream;
+
+
+
+@SupportsBatching
+@EventDriven
+@SideEffectFree
+@Tags({"split", "email"})
+@InputRequirement(Requirement.INPUT_REQUIRED)
+@CapabilityDescription("Extract attachments from a mime formatted email
file, splitting them into individual flowfiles.")
+@WritesAttributes({
+ @WritesAttribute(attribute = "filename ", description = "The
filename of the attachment"),
+ @WritesAttribute(attribute = "email.attachment.parent.filename ",
description = "The filename of the parent FlowFile"),
+ @WritesAttribute(attribute = "email.attachment.parent.uuid",
description = "The UUID of the original FlowFile."),
+ @WritesAttribute(attribute = "mime.type", description = "The mime
type of the attachment.")})
+
+public class ExtractEmailAttachments extends AbstractProcessor {
+ public static final String ATTACHMENT_ORIGINAL_FILENAME =
"email.attachment.parent.filename";
+ public static final String ATTACHMENT_ORIGINAL_UUID =
"email.attachment.parent.uuid";
+
+ public static final Relationship REL_ATTACHMENTS = new
Relationship.Builder()
+ .name("attachments")
+ .description("Each individual attachment will be routed to the
attachments relationship")
+ .build();
+ public static final Relationship REL_ORIGINAL = new
Relationship.Builder()
+ .name("original")
+ .description("The original file")
+ .build();
+ public static final Relationship REL_FAILURE = new
Relationship.Builder()
+ .name("failure")
+ .description("Flowfiles that could not be parsed")
+ .build();
+ private Set<Relationship> relationships;
+ private List<PropertyDescriptor> descriptors;
+
+
+ @Override
+ protected void init(final ProcessorInitializationContext context) {
+ final Set<Relationship> relationships = new HashSet<>();
+ relationships.add(REL_ATTACHMENTS);
+ relationships.add(REL_ORIGINAL);
+ relationships.add(REL_FAILURE);
+ this.relationships = Collections.unmodifiableSet(relationships);
+
+ final List<PropertyDescriptor> descriptors = new ArrayList<>();
+
+ this.descriptors = Collections.unmodifiableList(descriptors);
+ }
+
+ @Override
+ public void onTrigger(final ProcessContext context, final
ProcessSession session) {
+ final ComponentLog logger = getLogger();
+ final FlowFile originalFlowFile = session.get();
+ if (originalFlowFile == null) {
+ return;
+ }
+ final List<FlowFile> attachmentsList = new ArrayList<>();
+ final List<FlowFile> invalidFlowFilesList = new ArrayList<>();
+ final List<FlowFile> originalFlowFilesList = new ArrayList<>();
+
+ session.read(originalFlowFile, new InputStreamCallback() {
+ @Override
+ public void process(final InputStream rawIn) throws
IOException {
+ try (final InputStream in = new
BufferedInputStream(rawIn)) {
+ Properties props = new Properties();
+ Session mailSession =
Session.getDefaultInstance(props, null);
+ MimeMessage originalMessage = new
MimeMessage(mailSession, in);
+ MimeMessageParser parser = new
MimeMessageParser(originalMessage).parse();
+ // RFC-2822 determines that a message must have a
"From:" header
+ // if a message lacks the field, it is flagged as
invalid
+ Address[] from = originalMessage.getFrom();
+ Date sentDate = originalMessage.getSentDate();
+ if (from == null || sentDate == null ) {
+ // Throws MessageException due to lack of
minimum required headers
+ throw new MessagingException("Message failed
RFC2822 validation");
+ }
+ if (parser.hasAttachments()) {
+ final String originalFlowFileName =
originalFlowFile.getAttribute(CoreAttributes.FILENAME.key());
+ for (final DataSource data :
parser.getAttachmentList()) {
+ try {
+ FlowFile split =
session.create(originalFlowFile);
+ final Map<String, String> attributes = new
HashMap<>();
+ if
(StringUtils.isNotBlank(data.getName())) {
+
attributes.put(CoreAttributes.FILENAME.key(), data.getName());
+ }
+ if
(StringUtils.isNotBlank(data.getContentType())) {
+
attributes.put(CoreAttributes.MIME_TYPE.key(), data.getContentType());
+ }
+ String parentUuid =
originalFlowFile.getAttribute(CoreAttributes.UUID.key());
+ attributes.put(ATTACHMENT_ORIGINAL_UUID,
parentUuid);
+
attributes.put(ATTACHMENT_ORIGINAL_FILENAME, originalFlowFileName);
+ split = session.append(split, new
OutputStreamCallback() {
+ @Override
+ public void process(OutputStream out)
throws IOException {
+
IOUtils.copy(data.getInputStream(),out);
+ }
+ });
+ split = session.putAllAttributes(split,
attributes);
+
originalFlowFilesList.add(originalFlowFile);
--- End diff --
correct. noticed that when looking at the junit. addressed
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
