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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>LaxURLCodec xref</title><link type="text/css" rel="stylesheet" href="../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../apidocs/org/archive/net/LaxURLCodec.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> IAURLCodec</em></em><a name="2" href="#2">2</a> <em class="comment">*</em><a name="3" href="#3">3</a> <em class="comment">* $Id: LaxURLCodec.java,v 1.5 2006/07/18 00:40:16 gojomo Exp $</em><a name="4" href="#4">4</a> <em class="comment">*</em><a name="5" href="#5">5</a> <em class="comment">* Created on Jul 21, 2005</em><a name="6" href="#6">6</a> <em class="comment">*</em><a name="7" href="#7">7</a> <em class="comment">* Copyright (C) 2005 Internet Archive.</em><a name="8" href="#8">8</a> <em class="comment">*</em><a name="9" href="#9">9</a> <em class="comment">* This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="10" href="#10">10</a> <em class="comment">*</em><a name="11" href="#11">11</a> <em class="comment">* Heritrix is free software; you can redistribute it and/or modify</em><a name="12" href="#12">12</a> <em class="comment">* it under the terms of the GNU Lesser Public License as published by</em><a name="13" href="#13">13</a> <em class="comment">* the Free Software Foundation; either version 2.1 of the License, or</em><a name="14" href="#14">14</a> <em class="comment">* any later version.</em><a name="15" href="#15">15</a> <em class="comment">*</em><a name="16" href="#16">16</a> <em class="comment">* Heritrix is distributed in the hope that it will be useful,</em><a name="17" href="#17">17</a> <em class="comment">* but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="18" href="#18">18</a> <em class="comment">* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="19" href="#19">19</a> <em class="comment">* GNU Lesser Public License for more details.</em><a name="20" href="#20">20</a> <em class="comment">*</em><a name="21" href="#21">21</a> <em class="comment">* You should have received a copy of the GNU Lesser Public License</em><a name="22" href="#22">22</a> <em class="comment">* along with Heritrix; if not, write to the Free Software</em><a name="23" href="#23">23</a> <em class="comment">* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="24" href="#24">24</a> <em class="comment">*/</em> <a name="25" href="#25">25</a> <strong>package</strong> <a href="../../../org/archive/net/package-summary.html">org.archive.net</a>;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <strong>import</strong> java.io.ByteArrayOutputStream;<a name="28" href="#28">28</a> <strong>import</strong> java.io.UnsupportedEncodingException;<a name="29" href="#29">29</a> <strong>import</strong> java.util.BitSet;<a name="30" href="#30">30</a> <a name="31" href="#31">31</a> <strong>import</strong> org.apache.commons.codec.net.URLCodec;<a name="32" href="#32">32</a> <a name="33" href="#33">33</a> <em>/**<em>*</em></em><a name="34" href="#34">34</a> <em> * @author gojomo</em><a name="35" href="#35">35</a> <em> */</em><a name="36" href="#36">36</a> <strong>public</strong> <strong>class</strong> <a href="../../../org/archive/net/LaxURLCodec.html">LaxURLCodec</a> <strong>extends</strong> URLCodec {<a name="37" href="#37">37</a> <strong>public</strong> <strong>static</strong> <a href="../../../org/archive/net/LaxURLCodec.html">LaxURLCodec</a> DEFAULT = <strong>new</strong> <a href="../../../org/archive/net/LaxURLCodec.html">LaxURLCodec</a>(<span class="string">"UTF-8"</span>);<a name="38" href="#38">38</a> <a name="39" href="#39">39</a> <em class="comment">// passthrough constructor</em><a name="40" href="#40">40</a> <strong>public</strong> <a href="../../../org/archive/net/LaxURLCodec.html">LaxURLCodec</a>(String encoding) {<a name="41" href="#41">41</a> <strong>super</strong>(encoding);<a name="42" href="#42">42</a> }<a name="43" href="#43">43</a> <a name="44" href="#44">44</a> <em>/**<em>*</em></em><a name="45" href="#45">45</a> <em> * Decodes an array of URL safe 7-bit characters into an array of </em><a name="46" href="#46">46</a> <em> * original bytes. Escaped characters are converted back to their </em><a name="47" href="#47">47</a> <em> * original representation.</em><a name="48" href="#48">48</a> <em> * </em><a name="49" href="#49">49</a> <em> * Differs from URLCodec.decodeUrl() in that it throws no </em><a name="50" href="#50">50</a> <em> * exceptions; bad or incomplete escape sequences are ignored</em><a name="51" href="#51">51</a> <em> * and passed into result undecoded. This matches the behavior</em><a name="52" href="#52">52</a> <em> * of browsers, which will use inconsistently-encoded URIs</em><a name="53" href="#53">53</a> <em> * in HTTP request-lines. </em><a name="54" href="#54">54</a> <em> *</em><a name="55" href="#55">55</a> <em> * @param bytes array of URL safe characters</em><a name="56" href="#56">56</a> <em> * @return array of original bytes </em><a name="57" href="#57">57</a> <em> */</em><a name="58" href="#58">58</a> <strong>public</strong> <strong>static</strong> <strong>final</strong> byte[] decodeUrlLoose(byte[] bytes) <a name="59" href="#59">59</a> {<a name="60" href="#60">60</a> <strong>if</strong> (bytes == <strong>null</strong>) {<a name="61" href="#61">61</a> <strong>return</strong> <strong>null</strong>;<a name="62" href="#62">62</a> }<a name="63" href="#63">63</a> ByteArrayOutputStream buffer = <strong>new</strong> ByteArrayOutputStream(); <a name="64" href="#64">64</a> <strong>for</strong> (<strong>int</strong> i = 0; i < bytes.length; i++) {<a name="65" href="#65">65</a> <strong>int</strong> b = bytes[i];<a name="66" href="#66">66</a> <strong>if</strong> (b == '+') {<a name="67" href="#67">67</a> buffer.write(' ');<a name="68" href="#68">68</a> <strong>continue</strong>;<a name="69" href="#69">69</a> }<a name="70" href="#70">70</a> <strong>if</strong> (b == '%') {<a name="71" href="#71">71</a> <strong>if</strong>(i+2<bytes.length) {<a name="72" href="#72">72</a> <strong>int</strong> u = Character.digit((<strong>char</strong>)bytes[i+1], 16);<a name="73" href="#73">73</a> <strong>int</strong> l = Character.digit((<strong>char</strong>)bytes[i+2], 16);<a name="74" href="#74">74</a> <strong>if</strong> (u > -1 && l > -1) {<a name="75" href="#75">75</a> <em class="comment">// good encoding</em><a name="76" href="#76">76</a> <strong>int</strong> c = ((u << 4) + l);<a name="77" href="#77">77</a> buffer.write((<strong>char</strong>)c);<a name="78" href="#78">78</a> i += 2;<a name="79" href="#79">79</a> <strong>continue</strong>;<a name="80" href="#80">80</a> } <em class="comment">// else: bad encoding digits, leave '%' in place</em><a name="81" href="#81">81</a> } <em class="comment">// else: insufficient encoding digits, leave '%' in place</em><a name="82" href="#82">82</a> }<a name="83" href="#83">83</a> buffer.write(b);<a name="84" href="#84">84</a> }<a name="85" href="#85">85</a> <strong>return</strong> buffer.toByteArray(); <a name="86" href="#86">86</a> }<a name="87" href="#87">87</a> <a name="88" href="#88">88</a> <em>/**<em>*</em></em><a name="89" href="#89">89</a> <em> * A more expansive set of ASCII URI characters to consider as 'safe' to</em><a name="90" href="#90">90</a> <em> * leave unencoded, based on actual browser behavior.</em><a name="91" href="#91">91</a> <em> */</em><a name="92" href="#92">92</a> <strong>public</strong> <strong>static</strong> BitSet EXPANDED_URI_SAFE = <strong>new</strong> BitSet(256);<a name="93" href="#93">93</a> <strong>static</strong> {<a name="94" href="#94">94</a> <em class="comment">// alpha characters</em><a name="95" href="#95">95</a> <strong>for</strong> (<strong>int</strong> i = 'a'; i <= 'z'; i++) {<a name="96" href="#96">96</a> EXPANDED_URI_SAFE.set(i);<a name="97" href="#97">97</a> }<a name="98" href="#98">98</a> <strong>for</strong> (<strong>int</strong> i = 'A'; i <= 'Z'; i++) {<a name="99" href="#99">99</a> EXPANDED_URI_SAFE.set(i);<a name="100" href="#100">100</a> }<a name="101" href="#101">101</a> <em class="comment">// numeric characters</em><a name="102" href="#102">102</a> <strong>for</strong> (<strong>int</strong> i = '0'; i <= '9'; i++) {<a name="103" href="#103">103</a> EXPANDED_URI_SAFE.set(i);<a name="104" href="#104">104</a> }<a name="105" href="#105">105</a> <em class="comment">// special chars</em><a name="106" href="#106">106</a> EXPANDED_URI_SAFE.set('-');<a name="107" href="#107">107</a> EXPANDED_URI_SAFE.set('~');<a name="108" href="#108">108</a> EXPANDED_URI_SAFE.set('_');<a name="109" href="#109">109</a> EXPANDED_URI_SAFE.set('.');<a name="110" href="#110">110</a> EXPANDED_URI_SAFE.set('*');<a name="111" href="#111">111</a> EXPANDED_URI_SAFE.set('/');<a name="112" href="#112">112</a> EXPANDED_URI_SAFE.set('=');<a name="113" href="#113">113</a> EXPANDED_URI_SAFE.set('&');<a name="114" href="#114">114</a> EXPANDED_URI_SAFE.set('+');<a name="115" href="#115">115</a> EXPANDED_URI_SAFE.set(',');<a name="116" href="#116">116</a> EXPANDED_URI_SAFE.set(':');<a name="117" href="#117">117</a> EXPANDED_URI_SAFE.set(';');<a name="118" href="#118">118</a> EXPANDED_URI_SAFE.set('@');<a name="119" href="#119">119</a> EXPANDED_URI_SAFE.set('$');<a name="120" href="#120">120</a> EXPANDED_URI_SAFE.set('!');<a name="121" href="#121">121</a> EXPANDED_URI_SAFE.set(')');<a name="122" href="#122">122</a> EXPANDED_URI_SAFE.set('(');<a name="123" href="#123">123</a> <em class="comment">// experiments indicate: Firefox (1.0.6) never escapes '%'</em><a name="124" href="#124">124</a> EXPANDED_URI_SAFE.set('%');<a name="125" href="#125">125</a> <em class="comment">// experiments indicate: Firefox (1.0.6) does not escape '|' or '''</em><a name="126" href="#126">126</a> EXPANDED_URI_SAFE.set('|'); <a name="127" href="#127">127</a> EXPANDED_URI_SAFE.set('\'');<a name="128" href="#128">128</a> }<a name="129" href="#129">129</a> <a name="130" href="#130">130</a> <strong>public</strong> <strong>static</strong> BitSet QUERY_SAFE = <strong>new</strong> BitSet(256);<a name="131" href="#131">131</a> <strong>static</strong> {<a name="132" href="#132">132</a> QUERY_SAFE.or(EXPANDED_URI_SAFE);<a name="133" href="#133">133</a> <em class="comment">// Tests indicate Firefox (1.0.7-1) doesn't escape curlies in query str.</em><a name="134" href="#134">134</a> QUERY_SAFE.set('{');<a name="135" href="#135">135</a> QUERY_SAFE.set('}');<a name="136" href="#136">136</a> <em class="comment">// nor any of these: [ ] ^ ? </em><a name="137" href="#137">137</a> QUERY_SAFE.set('[');<a name="138" href="#138">138</a> QUERY_SAFE.set(']');<a name="139" href="#139">139</a> QUERY_SAFE.set('^');<a name="140" href="#140">140</a> QUERY_SAFE.set('?');<a name="141" href="#141">141</a> }<a name="142" href="#142">142</a> <a name="143" href="#143">143</a> <em>/**<em>*</em></em><a name="144" href="#144">144</a> <em> * Encodes a string into its URL safe form using the specified</em><a name="145" href="#145">145</a> <em> * string charset. Unsafe characters are escaped.</em><a name="146" href="#146">146</a> <em> * </em><a name="147" href="#147">147</a> <em> * This method is analogous to superclass encode() methods,</em><a name="148" href="#148">148</a> <em> * additionally offering the ability to specify a different</em><a name="149" href="#149">149</a> <em> * 'safe' character set (such as EXPANDED_URI_SAFE). </em><a name="150" href="#150">150</a> <em> * </em><a name="151" href="#151">151</a> <em> * @param safe BitSet of characters that don't need to be encoded</em><a name="152" href="#152">152</a> <em> * @param pString String to encode</em><a name="153" href="#153">153</a> <em> * @param cs Name of character set to use</em><a name="154" href="#154">154</a> <em> * @return Encoded version of <code>pString</code>.</em><a name="155" href="#155">155</a> <em> * @throws UnsupportedEncodingException</em><a name="156" href="#156">156</a> <em> */</em><a name="157" href="#157">157</a> <strong>public</strong> String encode(BitSet safe, String pString, String cs)<a name="158" href="#158">158</a> throws UnsupportedEncodingException {<a name="159" href="#159">159</a> <strong>if</strong> (pString == <strong>null</strong>) {<a name="160" href="#160">160</a> <strong>return</strong> <strong>null</strong>;<a name="161" href="#161">161</a> }<a name="162" href="#162">162</a> <strong>return</strong> <strong>new</strong> String(encodeUrl(safe,pString.getBytes(cs)), <span class="string">"US-ASCII"</span>);<a name="163" href="#163">163</a> }<a name="164" href="#164">164</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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