| 1 | /**************************************************************** |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one * |
| 3 | * or more contributor license agreements. See the NOTICE file * |
| 4 | * distributed with this work for additional information * |
| 5 | * regarding copyright ownership. The ASF licenses this file * |
| 6 | * to you under the Apache License, Version 2.0 (the * |
| 7 | * "License"); you may not use this file except in compliance * |
| 8 | * with the License. You may obtain a copy of the License at * |
| 9 | * * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
| 11 | * * |
| 12 | * Unless required by applicable law or agreed to in writing, * |
| 13 | * software distributed under the License is distributed on an * |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
| 15 | * KIND, either express or implied. See the License for the * |
| 16 | * specific language governing permissions and limitations * |
| 17 | * under the License. * |
| 18 | ****************************************************************/ |
| 19 | |
| 20 | package org.apache.james.jdkim.impl; |
| 21 | |
| 22 | import java.io.IOException; |
| 23 | import java.io.InputStream; |
| 24 | import java.util.Collections; |
| 25 | import java.util.HashMap; |
| 26 | import java.util.Iterator; |
| 27 | import java.util.LinkedList; |
| 28 | import java.util.List; |
| 29 | import java.util.Map; |
| 30 | |
| 31 | import org.apache.james.jdkim.api.Headers; |
| 32 | import org.apache.james.mime4j.MimeException; |
| 33 | import org.apache.james.mime4j.io.EOLConvertingInputStream; |
| 34 | import org.apache.james.mime4j.parser.MimeEntityConfig; |
| 35 | import org.apache.james.mime4j.parser.MimeTokenStream; |
| 36 | |
| 37 | /** |
| 38 | * The header of an entity (see RFC 2045). |
| 39 | */ |
| 40 | public class Message implements Headers { |
| 41 | |
| 42 | private List fields = new LinkedList(); |
| 43 | private Map fieldMap = new HashMap(); |
| 44 | private InputStream bodyIs = null; |
| 45 | |
| 46 | /** |
| 47 | * Creates a new empty <code>Header</code>. |
| 48 | */ |
| 49 | public Message() { |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Creates a new <code>Header</code> from the specified stream. |
| 54 | * |
| 55 | * @param is |
| 56 | * the stream to read the header from. |
| 57 | * |
| 58 | * @throws IOException |
| 59 | * on I/O errors. |
| 60 | * @throws MimeIOException |
| 61 | * on MIME protocol violations. |
| 62 | */ |
| 63 | public Message(InputStream is) throws IOException, MimeException { |
| 64 | MimeEntityConfig mec = new MimeEntityConfig(); |
| 65 | mec.setMaxLineLen(10000); |
| 66 | MimeTokenStream stream = new ExtendedMimeTokenStream(mec); |
| 67 | stream.setRecursionMode(MimeTokenStream.M_FLAT); |
| 68 | // DKIM requires no isolated CR or LF, so we alter them at source. |
| 69 | stream.parse(new EOLConvertingInputStream(is)); |
| 70 | for (int state = stream.getState(); state != MimeTokenStream.T_END_OF_STREAM; state = stream |
| 71 | .next()) { |
| 72 | switch (state) { |
| 73 | // a field |
| 74 | case MimeTokenStream.T_FIELD: |
| 75 | addField(stream.getFieldName(), stream.getField()); |
| 76 | break; |
| 77 | |
| 78 | // expected ignored tokens |
| 79 | case MimeTokenStream.T_START_MESSAGE: |
| 80 | case MimeTokenStream.T_END_MESSAGE: |
| 81 | case MimeTokenStream.T_START_HEADER: |
| 82 | case MimeTokenStream.T_END_HEADER: |
| 83 | break; |
| 84 | |
| 85 | // the body stream |
| 86 | case MimeTokenStream.T_BODY: |
| 87 | this.bodyIs = stream.getInputStream(); |
| 88 | break; |
| 89 | |
| 90 | default: |
| 91 | throw new IllegalStateException("Unexpected stream message: " |
| 92 | + state); |
| 93 | } |
| 94 | // stop parsing after header |
| 95 | if (bodyIs != null) |
| 96 | break; |
| 97 | } |
| 98 | |
| 99 | } |
| 100 | |
| 101 | public InputStream getBodyInputStream() { |
| 102 | return bodyIs; |
| 103 | } |
| 104 | |
| 105 | public void setBodyInputStream(InputStream is) { |
| 106 | bodyIs = is; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Adds a field to the end of the list of fields. |
| 111 | * |
| 112 | * @param field |
| 113 | * the field to add. |
| 114 | */ |
| 115 | public void addField(String fieldName, String field) { |
| 116 | List values = (List) fieldMap.get(fieldName.toLowerCase()); |
| 117 | if (values == null) { |
| 118 | values = new LinkedList(); |
| 119 | fieldMap.put(fieldName.toLowerCase(), values); |
| 120 | } |
| 121 | values.add(field); |
| 122 | fields.add(field); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * @see org.apache.james.jdkim.api.Headers#getFields() |
| 127 | */ |
| 128 | public List getFields() { |
| 129 | return Collections.unmodifiableList(fields); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * @see org.apache.james.jdkim.api.Headers#getFields(java.lang.String) |
| 134 | */ |
| 135 | public List getFields(final String name) { |
| 136 | final String lowerCaseName = name.toLowerCase(); |
| 137 | final List l = (List) fieldMap.get(lowerCaseName); |
| 138 | final List results; |
| 139 | if (l == null || l.isEmpty()) { |
| 140 | results = null; |
| 141 | } else { |
| 142 | results = Collections.unmodifiableList(l); |
| 143 | } |
| 144 | return results; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Return Header Object as String representation. Each headerline is |
| 149 | * seperated by "\r\n" |
| 150 | * |
| 151 | * @return headers |
| 152 | */ |
| 153 | public String toString() { |
| 154 | StringBuffer str = new StringBuffer(128); |
| 155 | for (Iterator i = fields.iterator(); i.hasNext();) { |
| 156 | String field = (String) i.next(); |
| 157 | str.append(field); |
| 158 | } |
| 159 | InputStream is = getBodyInputStream(); |
| 160 | if (is != null) { |
| 161 | str.append("\r\n"); |
| 162 | byte[] buff = new byte[128]; |
| 163 | int read; |
| 164 | try { |
| 165 | while ((read = is.read(buff)) > 0) { |
| 166 | str.append(new String(buff, 0, read)); |
| 167 | } |
| 168 | } catch (IOException e) { |
| 169 | } |
| 170 | } |
| 171 | return str.toString(); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Extends this to publish the constructor |
| 176 | */ |
| 177 | private final class ExtendedMimeTokenStream extends MimeTokenStream { |
| 178 | |
| 179 | public ExtendedMimeTokenStream(MimeEntityConfig mec) { |
| 180 | super(mec); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | } |