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 <span id="projectnumber">1.1</span>
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<div id="projectbrief">iipsrv is an advanced high-performance feature-rich image server for web-based streamed viewing and zooming of ultra high-resolution images</div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> Simple URL decoder Class</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"></span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (C) 2014-2015 Ruven Pillay.</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> This program is free software; you can redistribute it and/or modify</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> it under the terms of the GNU General Public License as published by</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> the Free Software Foundation; either version 3 of the License, or</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> (at your option) any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> This program is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> You should have received a copy of the GNU General Public License</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> along with this program; if not, write to the Free Software Foundation,</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">*/</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifndef _URL_H</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#define _URL_H</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <iterator></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <cctype></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classURL.html"> 32</a></span> <span class="keyword">class </span><a class="code" href="classURL.html">URL</a>{</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  std::string url;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  std::string warning_message;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// Internal utility function to decode hex values</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">char</span> hexToChar( <span class="keywordtype">char</span> first, <span class="keywordtype">char</span> second );</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classURL.html#a5cec25066f4836f15496ab7a20dce034"> 49</a></span>  <a class="code" href="classURL.html#a5cec25066f4836f15496ab7a20dce034">URL</a>( std::string s ){ url = s; };</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  std::string <a class="code" href="classURL.html#acafc39f0f69842c07ddd9cdda20d6e68">decode</a>();</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  std::string <a class="code" href="classURL.html#ab0e6419b81c075c1ab2feceaba3e2045">escape</a>();</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="classURL.html#aaf80f7a73527cb1f3c1c77ca74909066"> 58</a></span>  std::string <a class="code" href="classURL.html#aaf80f7a73527cb1f3c1c77ca74909066">warning</a>(){ <span class="keywordflow">return</span> warning_message; };</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> };</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword">inline</span> <span class="keywordtype">char</span> URL::hexToChar( <span class="keywordtype">char</span> first, <span class="keywordtype">char</span> second ){</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">int</span> digit;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  digit = (first >= <span class="charliteral">'A'</span> ? ((first & 0xDF) - <span class="charliteral">'A'</span>) + 10 : (first - <span class="charliteral">'0'</span>));</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  digit *= 16;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  digit += (second >= <span class="charliteral">'A'</span> ? ((second & 0xDF) - <span class="charliteral">'A'</span>) + 10 : (second - <span class="charliteral">'0'</span>));</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(digit);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// The argument is a URL path, which may contain spaces or other hex encoded characters.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// So, first decode and filter this path (implementation taken from GNU cgicc: http://www.cgicc.org)</span></div><div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="classURL.html#acafc39f0f69842c07ddd9cdda20d6e68"> 74</a></span> <span class="keyword">inline</span> std::string <a class="code" href="classURL.html#acafc39f0f69842c07ddd9cdda20d6e68">URL::decode</a>()</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  std::string argument;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  std::string::iterator iter;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordtype">char</span> c;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">for</span>(iter = url.begin(); iter != url.end(); ++iter) {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">switch</span>(*iter) {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">case</span> <span class="charliteral">'+'</span>:</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  argument.append(1,<span class="charliteral">' '</span>);</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">case</span> <span class="charliteral">'%'</span>:</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// Don't assume well-formed input</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span>( std::distance(iter, url.end()) >= 2 &&</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  std::isxdigit(*(iter + 1)) && std::isxdigit(*(iter + 2)) ){</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// Filter out embedded NULL bytes of the form %00 from the URL</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span>( (*(iter+1)==<span class="charliteral">'0'</span> && *(iter+2)==<span class="charliteral">'0'</span>) ){</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  warning_message = <span class="stringliteral">"Warning! Detected embedded NULL byte in URL: "</span> + url;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Wind forward our iterator</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  iter+=2;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// Otherwise decode the character</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">else</span>{</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  c = *++iter;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  argument.append(1,hexToChar(c,*++iter));</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  }</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// Just pass the % through untouched</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  argument.append(1,<span class="charliteral">'%'</span>);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  argument.append(1,*iter);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> argument;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">// Escape strings for JSON etc.</span></div><div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="classURL.html#ab0e6419b81c075c1ab2feceaba3e2045"> 119</a></span> <span class="keyword">inline</span> std::string <a class="code" href="classURL.html#ab0e6419b81c075c1ab2feceaba3e2045">URL::escape</a>()</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> {</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  std::string json;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  std::string input = this-><a class="code" href="classURL.html#acafc39f0f69842c07ddd9cdda20d6e68">decode</a>();</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">for</span>( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<input.length(); i++ ){</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordtype">char</span> c = input[i];</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">switch</span>(c){</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">case</span> <span class="charliteral">'\\'</span>:</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  json += <span class="stringliteral">"\\\\"</span>;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">case</span> <span class="charliteral">'"'</span>:</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  json += <span class="stringliteral">"\\\""</span>;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  json += c;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">return</span> json;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="classURL_html_ab0e6419b81c075c1ab2feceaba3e2045"><div class="ttname"><a href="classURL.html#ab0e6419b81c075c1ab2feceaba3e2045">URL::escape</a></div><div class="ttdeci">std::string escape()</div><div class="ttdoc">String escaping for JSON etc. </div><div class="ttdef"><b>Definition:</b> URL.h:119</div></div>
<div class="ttc" id="classURL_html_acafc39f0f69842c07ddd9cdda20d6e68"><div class="ttname"><a href="classURL.html#acafc39f0f69842c07ddd9cdda20d6e68">URL::decode</a></div><div class="ttdeci">std::string decode()</div><div class="ttdoc">Decode and filter URL. </div><div class="ttdef"><b>Definition:</b> URL.h:74</div></div>
<div class="ttc" id="classURL_html"><div class="ttname"><a href="classURL.html">URL</a></div><div class="ttdoc">Simple utility class to decode and filter URLs. </div><div class="ttdef"><b>Definition:</b> URL.h:32</div></div>
<div class="ttc" id="classURL_html_a5cec25066f4836f15496ab7a20dce034"><div class="ttname"><a href="classURL.html#a5cec25066f4836f15496ab7a20dce034">URL::URL</a></div><div class="ttdeci">URL(std::string s)</div><div class="ttdoc">Constructor. </div><div class="ttdef"><b>Definition:</b> URL.h:49</div></div>
<div class="ttc" id="classURL_html_aaf80f7a73527cb1f3c1c77ca74909066"><div class="ttname"><a href="classURL.html#aaf80f7a73527cb1f3c1c77ca74909066">URL::warning</a></div><div class="ttdeci">std::string warning()</div><div class="ttdoc">Return any warning message. </div><div class="ttdef"><b>Definition:</b> URL.h:58</div></div>
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