/**************************************************************** * 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.james.mime4j.samples.dom; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import java.io.IOException; import java.util.Date; import javax.imageio.ImageIO; import org.apache.james.mime4j.dom.BinaryBody; import org.apache.james.mime4j.dom.Multipart; import org.apache.james.mime4j.dom.TextBody; import org.apache.james.mime4j.field.address.AddressBuilder; import org.apache.james.mime4j.message.BodyPart; import org.apache.james.mime4j.message.MessageImpl; import org.apache.james.mime4j.message.MimeWriter; import org.apache.james.mime4j.message.MultipartImpl; import org.apache.james.mime4j.storage.Storage; import org.apache.james.mime4j.storage.StorageBodyFactory; import org.apache.james.mime4j.storage.StorageOutputStream; import org.apache.james.mime4j.storage.StorageProvider; /** * Creates a multipart/mixed message that consists of a text/plain and an * image/png part. The image is created on the fly; a similar technique can be * used to create PDF or XML attachments, for example. */ public class MultipartMessage { public static void main(String[] args) throws Exception { // 1) start with an empty message MessageImpl message = new MessageImpl(); // 2) set header fields // Date and From are required fields message.setDate(new Date()); message.setFrom(AddressBuilder.DEFAULT.parseMailbox("John Doe ")); // Message-ID should be present message.createMessageId("machine.example"); // set some optional fields message.setTo(AddressBuilder.DEFAULT.parseMailbox("Mary Smith ")); message.setSubject("An image for you"); // 3) set a multipart body Multipart multipart = new MultipartImpl("mixed"); // a multipart may have a preamble multipart.setPreamble("This is a multi-part message in MIME format."); // first part is text/plain StorageBodyFactory bodyFactory = new StorageBodyFactory(); BodyPart textPart = createTextPart(bodyFactory, "Why so serious?"); multipart.addBodyPart(textPart); // second part is image/png (image is created on the fly) BufferedImage image = renderSampleImage(); BodyPart imagePart = createImagePart(bodyFactory, image); multipart.addBodyPart(imagePart); // setMultipart also sets the Content-Type header field message.setMultipart(multipart); // 4) print message to standard output MimeWriter.DEFAULT.writeMessage(message, System.out); // 5) message is no longer needed and should be disposed of message.dispose(); } /** * Creates a text part from the specified string. */ private static BodyPart createTextPart(StorageBodyFactory bodyFactory, String text) { // Use UTF-8 to encode the specified text TextBody body = bodyFactory.textBody(text, "UTF-8"); // Create a text/plain body part BodyPart bodyPart = new BodyPart(); bodyPart.setText(body); bodyPart.setContentTransferEncoding("quoted-printable"); return bodyPart; } /** * Creates a binary part from the specified image. */ private static BodyPart createImagePart(StorageBodyFactory bodyFactory, BufferedImage image) throws IOException { // Create a binary message body from the image StorageProvider storageProvider = bodyFactory.getStorageProvider(); Storage storage = storeImage(storageProvider, image, "png"); BinaryBody body = bodyFactory.binaryBody(storage); // Create a body part with the correct MIME-type and transfer encoding BodyPart bodyPart = new BodyPart(); bodyPart.setBody(body, "image/png"); bodyPart.setContentTransferEncoding("base64"); // Specify a filename in the Content-Disposition header (implicitly sets // the disposition type to "attachment") bodyPart.setFilename("smiley.png"); return bodyPart; } /** * Stores the specified image in a Storage object. */ private static Storage storeImage(StorageProvider storageProvider, BufferedImage image, String formatName) throws IOException { // An output stream that is capable of building a Storage object. StorageOutputStream out = storageProvider.createStorageOutputStream(); // Write the image to our output stream. A StorageOutputStream can be // used to create attachments using any API that supports writing a // document to an output stream, e.g. iText's PdfWriter. ImageIO.write(image, formatName, out); // Implicitly closes the output stream and returns the data that has // been written to it. return out.toStorage(); } /** * Draws an image; unrelated to Mime4j. */ private static BufferedImage renderSampleImage() { System.setProperty("java.awt.headless", "true"); final int size = 100; BufferedImage img = new BufferedImage(size, size, BufferedImage.TYPE_BYTE_GRAY); Graphics2D gfx = img.createGraphics(); gfx.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); gfx.setStroke(new BasicStroke(size / 40f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); gfx.setColor(Color.BLACK); gfx.setBackground(Color.WHITE); gfx.clearRect(0, 0, size, size); int b = size / 30; gfx.drawOval(b, b, size - 1 - 2 * b, size - 1 - 2 * b); int esz = size / 7; int ex = (int) (0.27f * size); gfx.drawOval(ex, ex, esz, esz); gfx.drawOval(size - 1 - esz - ex, ex, esz, esz); b = size / 5; gfx.drawArc(b, b, size - 1 - 2 * b, size - 1 - 2 * b, 200, 140); return img; } }