Github user JPercivall commented on a diff in the pull request: https://github.com/apache/nifi/pull/483#discussion_r70096131 --- Diff: nifi-nar-bundles/nifi-email-bundle/nifi-email-processors/src/main/java/org/apache/nifi/processors/email/ExtractEmailAttachments.java --- @@ -0,0 +1,201 @@ +/* + * 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.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.io.InputStreamCallback; +import org.apache.nifi.processor.io.OutputStreamCallback; +import org.apache.nifi.stream.io.BufferedInputStream; + + + + +@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 ) { + // See ya later my friend... --- End diff -- Recommend removing this
--- 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. ---