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.stream; |
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21 | |
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22 | import java.util.BitSet; |
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23 | |
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24 | import org.apache.james.mime4j.MimeException; |
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25 | import org.apache.james.mime4j.util.ByteSequence; |
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26 | import org.apache.james.mime4j.util.ContentUtil; |
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27 | import org.apache.james.mime4j.util.MimeUtil; |
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28 | |
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29 | /** |
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30 | * The basic immutable MIME field. |
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31 | */ |
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32 | public class RawField { |
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33 | |
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34 | private static final BitSet fieldChars = new BitSet(); |
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35 | |
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36 | static { |
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37 | for (int i = 0x21; i <= 0x39; i++) { |
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38 | fieldChars.set(i); |
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39 | } |
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40 | for (int i = 0x3b; i <= 0x7e; i++) { |
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41 | fieldChars.set(i); |
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42 | } |
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43 | } |
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44 | |
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45 | |
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46 | private ByteSequence raw; |
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47 | private int colonIdx; |
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48 | private int headerNameEndIdx; |
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49 | |
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50 | private String name; |
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51 | private String body; |
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52 | private final boolean obsoleteSyntax; |
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53 | |
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54 | public RawField(String name, String body) { |
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55 | this.name = name; |
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56 | this.body = body; |
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57 | this.raw = null; |
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58 | this.obsoleteSyntax = false; |
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59 | } |
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60 | |
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61 | /** |
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62 | * @param raw bytes |
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63 | * @throws MimeException on malformed data |
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64 | */ |
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65 | public RawField(ByteSequence raw) throws MimeException { |
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66 | this.raw = raw; |
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67 | |
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68 | colonIdx = -1; |
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69 | boolean obsolete = false; |
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70 | for (int i = 0; i < raw.length(); i++) { |
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71 | if (!fieldChars.get(raw.byteAt(i) & 0xff)) { |
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72 | headerNameEndIdx = i; |
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73 | for (; i < raw.length(); i++) { |
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74 | int j = raw.byteAt(i) & 0xff; |
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75 | if (j == ':') { |
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76 | colonIdx = i; |
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77 | break; |
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78 | } else if (j != 0x20 && j != 0x09) { |
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79 | throw new MimeException("Invalid header. Unexpected char after colon: "+j); |
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80 | } else { |
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81 | obsolete = true; |
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82 | } |
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83 | } |
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84 | break; |
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85 | } |
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86 | } |
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87 | if (colonIdx == -1) throw new MimeException("Invalid header. No colon found."); |
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88 | obsoleteSyntax = obsolete; |
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89 | } |
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90 | |
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91 | public String getName() { |
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92 | if (name == null) { |
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93 | name = parseName(); |
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94 | } |
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95 | |
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96 | return name; |
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97 | } |
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98 | |
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99 | public String getBody() { |
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100 | if (body == null) { |
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101 | body = parseBody(); |
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102 | } |
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103 | |
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104 | return body; |
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105 | } |
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106 | |
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107 | public ByteSequence getRaw() { |
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108 | if (raw == null) { |
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109 | raw = ContentUtil.encode(MimeUtil.fold(name+": "+body, 0)); |
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110 | } |
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111 | return raw; |
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112 | } |
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113 | |
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114 | @Override |
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115 | public String toString() { |
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116 | return getName() + ": " + getBody(); |
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117 | } |
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118 | |
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119 | private String parseName() { |
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120 | // make sure we ignore ending WSP (obsolete rfc822 syntax) |
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121 | return ContentUtil.decode(raw, 0, headerNameEndIdx); |
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122 | } |
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123 | |
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124 | private String parseBody() { |
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125 | int offset = colonIdx + 1; |
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126 | // if the header body starts with a space we remove it. |
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127 | if (raw.length() > offset + 1 && (raw.byteAt(offset) & 0xff) == 0x20) offset++; |
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128 | int length = raw.length() - offset; |
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129 | return MimeUtil.unfold(ContentUtil.decode(raw, offset, length)); |
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130 | } |
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131 | |
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132 | public boolean isObsoleteSyntax() { |
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133 | return obsoleteSyntax; |
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134 | } |
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135 | |
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136 | } |
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