[6785] | 1 | /**************************************************************** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one * |
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| 3 | * or more contributor license agreements. See the NOTICE file * |
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| 4 | * distributed with this work for additional information * |
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| 5 | * regarding copyright ownership. The ASF licenses this file * |
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| 6 | * to you under the Apache License, Version 2.0 (the * |
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| 7 | * "License"); you may not use this file except in compliance * |
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| 8 | * with the License. You may obtain a copy of the License at * |
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| 9 | * * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
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| 11 | * * |
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| 12 | * Unless required by applicable law or agreed to in writing, * |
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| 13 | * software distributed under the License is distributed on an * |
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| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
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| 15 | * KIND, either express or implied. See the License for the * |
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| 16 | * specific language governing permissions and limitations * |
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| 17 | * under the License. * |
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| 18 | ****************************************************************/ |
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| 19 | |
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| 20 | package org.apache.james.mime4j.samples.dom; |
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| 21 | |
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| 22 | import java.awt.BasicStroke; |
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| 23 | import java.awt.Color; |
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| 24 | import java.awt.Graphics2D; |
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| 25 | import java.awt.RenderingHints; |
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| 26 | import java.awt.image.BufferedImage; |
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| 27 | import java.io.IOException; |
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| 28 | import java.util.Date; |
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| 29 | |
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| 30 | import javax.imageio.ImageIO; |
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| 31 | |
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| 32 | import org.apache.james.mime4j.dom.BinaryBody; |
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| 33 | import org.apache.james.mime4j.dom.Multipart; |
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| 34 | import org.apache.james.mime4j.dom.TextBody; |
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| 35 | import org.apache.james.mime4j.field.address.AddressBuilder; |
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| 36 | import org.apache.james.mime4j.message.BodyPart; |
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| 37 | import org.apache.james.mime4j.message.MessageImpl; |
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| 38 | import org.apache.james.mime4j.message.MimeWriter; |
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| 39 | import org.apache.james.mime4j.message.MultipartImpl; |
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| 40 | import org.apache.james.mime4j.storage.Storage; |
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| 41 | import org.apache.james.mime4j.storage.StorageBodyFactory; |
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| 42 | import org.apache.james.mime4j.storage.StorageOutputStream; |
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| 43 | import org.apache.james.mime4j.storage.StorageProvider; |
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| 44 | |
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| 45 | /** |
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| 46 | * Creates a multipart/mixed message that consists of a text/plain and an |
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| 47 | * image/png part. The image is created on the fly; a similar technique can be |
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| 48 | * used to create PDF or XML attachments, for example. |
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| 49 | */ |
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| 50 | public class MultipartMessage { |
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| 51 | |
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| 52 | public static void main(String[] args) throws Exception { |
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| 53 | // 1) start with an empty message |
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| 54 | |
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| 55 | MessageImpl message = new MessageImpl(); |
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| 56 | |
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| 57 | // 2) set header fields |
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| 58 | |
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| 59 | // Date and From are required fields |
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| 60 | message.setDate(new Date()); |
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| 61 | message.setFrom(AddressBuilder.DEFAULT.parseMailbox("John Doe <jdoe@machine.example>")); |
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| 62 | |
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| 63 | // Message-ID should be present |
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| 64 | message.createMessageId("machine.example"); |
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| 65 | |
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| 66 | // set some optional fields |
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| 67 | message.setTo(AddressBuilder.DEFAULT.parseMailbox("Mary Smith <mary@example.net>")); |
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| 68 | message.setSubject("An image for you"); |
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| 69 | |
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| 70 | // 3) set a multipart body |
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| 71 | |
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| 72 | Multipart multipart = new MultipartImpl("mixed"); |
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| 73 | |
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| 74 | // a multipart may have a preamble |
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| 75 | multipart.setPreamble("This is a multi-part message in MIME format."); |
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| 76 | |
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| 77 | // first part is text/plain |
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| 78 | StorageBodyFactory bodyFactory = new StorageBodyFactory(); |
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| 79 | BodyPart textPart = createTextPart(bodyFactory, "Why so serious?"); |
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| 80 | multipart.addBodyPart(textPart); |
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| 81 | |
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| 82 | // second part is image/png (image is created on the fly) |
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| 83 | BufferedImage image = renderSampleImage(); |
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| 84 | BodyPart imagePart = createImagePart(bodyFactory, image); |
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| 85 | multipart.addBodyPart(imagePart); |
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| 86 | |
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| 87 | // setMultipart also sets the Content-Type header field |
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| 88 | message.setMultipart(multipart); |
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| 89 | |
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| 90 | // 4) print message to standard output |
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| 91 | |
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| 92 | MimeWriter.DEFAULT.writeMessage(message, System.out); |
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| 93 | |
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| 94 | // 5) message is no longer needed and should be disposed of |
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| 95 | |
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| 96 | message.dispose(); |
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| 97 | } |
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| 98 | |
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| 99 | /** |
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| 100 | * Creates a text part from the specified string. |
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| 101 | */ |
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| 102 | private static BodyPart createTextPart(StorageBodyFactory bodyFactory, String text) { |
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| 103 | // Use UTF-8 to encode the specified text |
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| 104 | TextBody body = bodyFactory.textBody(text, "UTF-8"); |
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| 105 | |
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| 106 | // Create a text/plain body part |
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| 107 | BodyPart bodyPart = new BodyPart(); |
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| 108 | bodyPart.setText(body); |
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| 109 | bodyPart.setContentTransferEncoding("quoted-printable"); |
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| 110 | |
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| 111 | return bodyPart; |
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| 112 | } |
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| 113 | |
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| 114 | /** |
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| 115 | * Creates a binary part from the specified image. |
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| 116 | */ |
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| 117 | private static BodyPart createImagePart(StorageBodyFactory bodyFactory, |
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| 118 | BufferedImage image) throws IOException { |
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| 119 | // Create a binary message body from the image |
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| 120 | StorageProvider storageProvider = bodyFactory.getStorageProvider(); |
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| 121 | Storage storage = storeImage(storageProvider, image, "png"); |
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| 122 | BinaryBody body = bodyFactory.binaryBody(storage); |
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| 123 | |
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| 124 | // Create a body part with the correct MIME-type and transfer encoding |
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| 125 | BodyPart bodyPart = new BodyPart(); |
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| 126 | bodyPart.setBody(body, "image/png"); |
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| 127 | bodyPart.setContentTransferEncoding("base64"); |
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| 128 | |
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| 129 | // Specify a filename in the Content-Disposition header (implicitly sets |
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| 130 | // the disposition type to "attachment") |
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| 131 | bodyPart.setFilename("smiley.png"); |
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| 132 | |
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| 133 | return bodyPart; |
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| 134 | } |
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| 135 | |
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| 136 | /** |
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| 137 | * Stores the specified image in a Storage object. |
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| 138 | */ |
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| 139 | private static Storage storeImage(StorageProvider storageProvider, |
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| 140 | BufferedImage image, String formatName) throws IOException { |
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| 141 | // An output stream that is capable of building a Storage object. |
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| 142 | StorageOutputStream out = storageProvider.createStorageOutputStream(); |
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| 143 | |
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| 144 | // Write the image to our output stream. A StorageOutputStream can be |
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| 145 | // used to create attachments using any API that supports writing a |
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| 146 | // document to an output stream, e.g. iText's PdfWriter. |
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| 147 | ImageIO.write(image, formatName, out); |
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| 148 | |
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| 149 | // Implicitly closes the output stream and returns the data that has |
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| 150 | // been written to it. |
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| 151 | return out.toStorage(); |
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| 152 | } |
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| 153 | |
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| 154 | /** |
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| 155 | * Draws an image; unrelated to Mime4j. |
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| 156 | */ |
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| 157 | private static BufferedImage renderSampleImage() { |
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| 158 | System.setProperty("java.awt.headless", "true"); |
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| 159 | |
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| 160 | final int size = 100; |
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| 161 | |
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| 162 | BufferedImage img = new BufferedImage(size, size, |
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| 163 | BufferedImage.TYPE_BYTE_GRAY); |
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| 164 | |
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| 165 | Graphics2D gfx = img.createGraphics(); |
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| 166 | gfx.setRenderingHint(RenderingHints.KEY_ANTIALIASING, |
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| 167 | RenderingHints.VALUE_ANTIALIAS_ON); |
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| 168 | gfx.setStroke(new BasicStroke(size / 40f, BasicStroke.CAP_ROUND, |
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| 169 | BasicStroke.JOIN_ROUND)); |
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| 170 | |
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| 171 | gfx.setColor(Color.BLACK); |
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| 172 | gfx.setBackground(Color.WHITE); |
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| 173 | gfx.clearRect(0, 0, size, size); |
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| 174 | |
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| 175 | int b = size / 30; |
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| 176 | gfx.drawOval(b, b, size - 1 - 2 * b, size - 1 - 2 * b); |
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| 177 | |
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| 178 | int esz = size / 7; |
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| 179 | int ex = (int) (0.27f * size); |
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| 180 | gfx.drawOval(ex, ex, esz, esz); |
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| 181 | gfx.drawOval(size - 1 - esz - ex, ex, esz, esz); |
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| 182 | |
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| 183 | b = size / 5; |
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| 184 | gfx.drawArc(b, b, size - 1 - 2 * b, size - 1 - 2 * b, 200, 140); |
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| 185 | |
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| 186 | return img; |
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| 187 | } |
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| 188 | |
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| 189 | } |
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