1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.mail2.javax.util;
18
19 import java.io.File;
20 import java.io.FileInputStream;
21 import java.io.FileOutputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.OutputStream;
25 import java.nio.charset.StandardCharsets;
26 import java.nio.file.Files;
27 import java.nio.file.OpenOption;
28 import java.nio.file.Path;
29
30 import javax.mail.MessagingException;
31 import javax.mail.Session;
32 import javax.mail.internet.MimeMessage;
33 import javax.mail.util.SharedByteArrayInputStream;
34
35 /**
36 * Creates {@link MimeMessage} instances and other helper methods.
37 *
38 * @since 1.3
39 */
40 public final class MimeMessageUtils {
41
42 /**
43 * Creates a MimeMessage.
44 *
45 * @param session the mail session.
46 * @param source the input data.
47 * @return the MimeMessage.
48 * @throws MessagingException creating the MimeMessage failed.
49 * @throws IOException creating the MimeMessage failed.
50 */
51 public static MimeMessage createMimeMessage(final Session session, final byte[] source) throws MessagingException, IOException {
52 try (InputStream inputStream = new SharedByteArrayInputStream(source)) {
53 return new MimeMessage(session, inputStream);
54 }
55 }
56
57 /**
58 * Creates a MimeMessage.
59 *
60 * @param session the mail session.
61 * @param source the input data.
62 * @return the MimeMessage.
63 * @throws MessagingException creating the MimeMessage failed.
64 * @throws IOException creating the MimeMessage failed.
65 */
66 public static MimeMessage createMimeMessage(final Session session, final File source) throws MessagingException, IOException {
67 try (InputStream inputStream = new FileInputStream(source)) {
68 return createMimeMessage(session, inputStream);
69 }
70 }
71
72 /**
73 * Creates a MimeMessage.
74 *
75 * @param session the mail session.
76 * @param source the input data.
77 * @return the MimeMessage.
78 * @throws MessagingException creating the MimeMessage failed.
79 */
80 public static MimeMessage createMimeMessage(final Session session, final InputStream source) throws MessagingException {
81 return new MimeMessage(session, source);
82 }
83
84 /**
85 * Creates a MimeMessage.
86 *
87 * @param session the mail session.
88 * @param source the input data.
89 * @param options options specifying how the file is opened.
90 * @return the MimeMessage.
91 * @throws MessagingException creating the MimeMessage failed.
92 * @throws IOException creating the MimeMessage failed.
93 */
94 public static MimeMessage createMimeMessage(final Session session, final Path source, final OpenOption... options) throws MessagingException, IOException {
95 try (InputStream inputStream = Files.newInputStream(source, options)) {
96 return createMimeMessage(session, inputStream);
97 }
98 }
99
100 /**
101 * Creates a MimeMessage using the platform's default character encoding.
102 *
103 * @param session the mail session.
104 * @param source the input data.
105 * @return the MimeMessage.
106 * @throws MessagingException creating the MimeMessage failed.
107 * @throws IOException creating the MimeMessage failed.
108 */
109 public static MimeMessage createMimeMessage(final Session session, final String source) throws MessagingException, IOException {
110 // RFC1341: https://www.w3.org/Protocols/rfc1341/7_1_Text.html
111 return createMimeMessage(session, source.getBytes(StandardCharsets.US_ASCII));
112 }
113
114 /**
115 * Writes a MimeMessage into a file.
116 *
117 * @param mimeMessage the MimeMessage to write.
118 * @param resultFile the file containing the MimeMessage.
119 * @throws MessagingException accessing MimeMessage failed.
120 * @throws IOException writing the MimeMessage failed.
121 */
122 public static void writeMimeMessage(final MimeMessage mimeMessage, final File resultFile) throws MessagingException, IOException {
123 if (!resultFile.getParentFile().exists() && !resultFile.getParentFile().mkdirs()) {
124 throw new IOException("Failed to create the following parent directories: " + resultFile.getParentFile());
125 }
126 try (OutputStream outputStream = new FileOutputStream(resultFile)) {
127 mimeMessage.writeTo(outputStream);
128 outputStream.flush();
129 }
130 }
131
132 /**
133 * Instances should NOT be constructed in standard programming.
134 */
135 private MimeMessageUtils() {
136 }
137 }