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1 /*******************************************************************************
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2
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3 @file UDomainName.d
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4
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5 Copyright (c) 2004 Kris Bell
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6
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7 This software is provided 'as-is', without any express or implied
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8 warranty. In no event will the authors be held liable for damages
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9 of any kind arising from the use of this software.
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10
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11 Permission is hereby granted to anyone to use this software for any
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12 purpose, including commercial applications, and to alter it and/or
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13 redistribute it freely, subject to the following restrictions:
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14
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15 1. The origin of this software must not be misrepresented; you must
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16 not claim that you wrote the original software. If you use this
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17 software in a product, an acknowledgment within documentation of
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18 said product would be appreciated but is not required.
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19
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20 2. Altered source versions must be plainly marked as such, and must
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21 not be misrepresented as being the original software.
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22
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23 3. This notice may not be removed or altered from any distribution
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24 of the source.
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25
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26 4. Derivative works are permitted, but they must carry this notice
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27 in full and credit the original source.
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28
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29
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30 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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31
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32
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33 @version Initial version, November 2004
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34 @author Kris
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35
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36 Note that this package and documentation is built around the ICU
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37 project (http://oss.software.ibm.com/icu/). Below is the license
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38 statement as specified by that software:
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39
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40
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41 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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42
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43
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44 ICU License - ICU 1.8.1 and later
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45
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46 COPYRIGHT AND PERMISSION NOTICE
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47
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48 Copyright (c) 1995-2003 International Business Machines Corporation and
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49 others.
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50
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51 All rights reserved.
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52
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53 Permission is hereby granted, free of charge, to any person obtaining a
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54 copy of this software and associated documentation files (the
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55 "Software"), to deal in the Software without restriction, including
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56 without limitation the rights to use, copy, modify, merge, publish,
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57 distribute, and/or sell copies of the Software, and to permit persons
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58 to whom the Software is furnished to do so, provided that the above
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59 copyright notice(s) and this permission notice appear in all copies of
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60 the Software and that both the above copyright notice(s) and this
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61 permission notice appear in supporting documentation.
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62
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63 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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64 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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65 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
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66 OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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67 HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
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68 INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
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69 FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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70 NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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71 WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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72
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73 Except as contained in this notice, the name of a copyright holder
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74 shall not be used in advertising or otherwise to promote the sale, use
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75 or other dealings in this Software without prior written authorization
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76 of the copyright holder.
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77
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78 ----------------------------------------------------------------------
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79
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80 All trademarks and registered trademarks mentioned herein are the
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81 property of their respective owners.
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82
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83 *******************************************************************************/
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84
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85 module dwtx.dwtxhelper.mangoicu.UDomainName;
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86
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87 private import dwtx.dwtxhelper.mangoicu.ICU,
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88 dwtx.dwtxhelper.mangoicu.UString;
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89
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90 /*******************************************************************************
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91
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92 UIDNA API implements the IDNA protocol as defined in the
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93 IDNA RFC (http://www.ietf.org/rfc/rfc3490.txt).
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94
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95 The RFC defines 2 operations: toAscii and toUnicode. Domain
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96 labels containing non-ASCII code points are required to be
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97 processed by toAscii operation before passing it to resolver
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98 libraries. Domain names that are obtained from resolver
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99 libraries are required to be processed by toUnicode operation
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100 before displaying the domain name to the user. IDNA requires
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101 that implementations process input strings with Nameprep
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102 (http://www.ietf.org/rfc/rfc3491.txt), which is a profile of
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103 Stringprep (http://www.ietf.org/rfc/rfc3454.txt), and then with
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104 Punycode (http://www.ietf.org/rfc/rfc3492.txt). Implementations
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105 of IDNA MUST fully implement Nameprep and Punycode; neither
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106 Nameprep nor Punycode are optional.
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107
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108 The input and output of toAscii() and ToUnicode() operations are
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109 Unicode and are designed to be chainable, i.e., applying toAscii()
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110 or toUnicode() operations multiple times to an input string will
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111 yield the same result as applying the operation once.
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112
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113 See <A HREF="http://oss.software.ibm.com/icu/apiref/uidna_8h.html">
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114 this page</A> for full details.
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115
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116 *******************************************************************************/
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117
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118 class UDomainName : ICU
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119 {
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120 private UStringView text;
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121 private Handle handle;
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122
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123 enum Options
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124 {
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125 Strict,
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126 Lenient,
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127 Std3
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128 }
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129
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130
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131 /***********************************************************************
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132
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133
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134 ***********************************************************************/
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135
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136 this (UStringView text)
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137 {
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138 this.text = text;
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139 }
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140
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141 /***********************************************************************
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142
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143 This function implements the ToASCII operation as
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144 defined in the IDNA RFC.
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145
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146 This operation is done on single labels before sending
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147 it to something that expects ASCII names. A label is an
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148 individual part of a domain name. Labels are usually
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149 separated by dots; e.g." "www.example.com" is composed
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150 of 3 labels "www","example", and "com".
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151
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152 ***********************************************************************/
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153
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154 void toAscii (UString dst, Options o = Options.Strict)
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155 {
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156 uint fmt (wchar* p, uint len, inout UErrorCode e)
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157 {
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158 return uidna_toASCII (text.get.ptr, text.len, p, len, o, null, e);
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159 }
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160
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161 dst.format (&fmt, "failed to convert IDN to ASCII");
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162 }
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163
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164 /***********************************************************************
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165
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166 This function implements the ToUnicode operation as
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167 defined in the IDNA RFC.
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168
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169 This operation is done on single labels before sending
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170 it to something that expects Unicode names. A label is
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171 an individual part of a domain name. Labels are usually
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172 separated by dots; for e.g." "www.example.com" is composed
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173 of 3 labels "www","example", and "com".
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174
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175 ***********************************************************************/
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176
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177 void toUnicode (UString dst, Options o = Options.Strict)
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178 {
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179 uint fmt (wchar* p, uint len, inout UErrorCode e)
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180 {
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181 return uidna_toUnicode (text.get.ptr, text.len, p, len, o, null, e);
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182 }
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183
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184 dst.format (&fmt, "failed to convert IDN to Unicode");
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185 }
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186
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187 /***********************************************************************
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188
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189 Convenience function that implements the IDNToASCII
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190 operation as defined in the IDNA RFC.
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191
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192 This operation is done on complete domain names, e.g:
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193 "www.example.com". It is important to note that this
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194 operation can fail. If it fails, then the input domain
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195 name cannot be used as an Internationalized Domain Name
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196 and the application should have methods defined to deal
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197 with the failure.
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198
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199 Note: IDNA RFC specifies that a conformant application
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200 should divide a domain name into separate labels, decide
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201 whether to apply allowUnassigned and useSTD3ASCIIRules
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202 on each, and then convert. This function does not offer
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203 that level of granularity. The options once set will apply
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204 to all labels in the domain name
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205
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206 ***********************************************************************/
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207
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208 void IdnToAscii (UString dst, Options o = Options.Strict)
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209 {
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210 uint fmt (wchar* p, uint len, inout UErrorCode e)
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211 {
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212 return uidna_IDNToASCII (text.get.ptr, text.len, p, len, o, null, e);
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213 }
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214
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215 dst.format (&fmt, "failed to convert IDN to ASCII");
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216 }
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217
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218 /***********************************************************************
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219
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220 Convenience function that implements the IDNToUnicode
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221 operation as defined in the IDNA RFC.
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222
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223 This operation is done on complete domain names, e.g:
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224 "www.example.com".
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225
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226 Note: IDNA RFC specifies that a conformant application
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227 should divide a domain name into separate labels, decide
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228 whether to apply allowUnassigned and useSTD3ASCIIRules
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229 on each, and then convert. This function does not offer
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230 that level of granularity. The options once set will apply
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231 to all labels in the domain name
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232
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233 ***********************************************************************/
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234
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235 void IdnToUnicode (UString dst, Options o = Options.Strict)
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236 {
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237 uint fmt (wchar* p, uint len, inout UErrorCode e)
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238 {
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239 return uidna_IDNToUnicode (text.get.ptr, text.len, p, len, o, null, e);
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240 }
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241
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242 dst.format (&fmt, "failed to convert IDN to Unicode");
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243 }
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244
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245 /***********************************************************************
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246
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247 Compare two IDN strings for equivalence.
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248
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249 This function splits the domain names into labels and
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250 compares them. According to IDN RFC, whenever two labels
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251 are compared, they are considered equal if and only if
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252 their ASCII forms (obtained by applying toASCII) match
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253 using an case-insensitive ASCII comparison. Two domain
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254 names are considered a match if and only if all labels
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255 match regardless of whether label separators match
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256
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257 ***********************************************************************/
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258
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259 int compare (UString other, Options o = Options.Strict)
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260 {
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261 UErrorCode e;
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262 int i = uidna_compare (text.get.ptr, text.len, other.get.ptr, other.len, o, e);
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263 testError (e, "failed to compare IDN strings");
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264 return i;
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265 }
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266
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267
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268 /***********************************************************************
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269
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270 Bind the ICU functions from a shared library. This is
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271 complicated by the issues regarding D and DLLs on the
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272 Windows platform
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273
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274 ***********************************************************************/
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275
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276 private static void* library;
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277
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278 /***********************************************************************
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279
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280 ***********************************************************************/
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281
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282 private static extern (C)
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283 {
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284 uint function (wchar*, uint, wchar*, uint, uint, void*, inout UErrorCode) uidna_toASCII;
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285 uint function (wchar*, uint, wchar*, uint, uint, void*, inout UErrorCode) uidna_toUnicode;
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286 uint function (wchar*, uint, wchar*, uint, uint, void*, inout UErrorCode) uidna_IDNToASCII;
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287 uint function (wchar*, uint, wchar*, uint, uint, void*, inout UErrorCode) uidna_IDNToUnicode;
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288 int function (wchar*, uint, wchar*, uint, uint, inout UErrorCode) uidna_compare;
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289 }
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290
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291 /***********************************************************************
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292
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293 ***********************************************************************/
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294
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295 static FunctionLoader.Bind[] targets =
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296 [
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297 {cast(void**) &uidna_toASCII, "uidna_toASCII"},
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298 {cast(void**) &uidna_toUnicode, "uidna_toUnicode"},
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299 {cast(void**) &uidna_IDNToASCII, "uidna_IDNToASCII"},
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300 {cast(void**) &uidna_IDNToUnicode, "uidna_IDNToUnicode"},
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301 {cast(void**) &uidna_compare, "uidna_compare"},
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302 ];
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303
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304 /***********************************************************************
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305
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306 ***********************************************************************/
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307
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308 static this ()
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309 {
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310 library = FunctionLoader.bind (icuuc, targets);
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311 }
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312
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313 /***********************************************************************
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314
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315 ***********************************************************************/
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316
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317 static ~this ()
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318 {
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319 FunctionLoader.unbind (library);
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320 }
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321 }
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322
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