📄 stripwwwnrule.html
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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>StripWWWNRule xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/org/archive/crawler/url/canonicalize/StripWWWNRule.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> StripWWWRule</em></em><a name="2" href="#2">2</a> <em class="comment"> * </em><a name="3" href="#3">3</a> <em class="comment"> * Created on Oct 5, 2004</em><a name="4" href="#4">4</a> <em class="comment"> *</em><a name="5" href="#5">5</a> <em class="comment"> * Copyright (C) 2004 Internet Archive.</em><a name="6" href="#6">6</a> <em class="comment"> * </em><a name="7" href="#7">7</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="8" href="#8">8</a> <em class="comment"> * </em><a name="9" href="#9">9</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="10" href="#10">10</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="11" href="#11">11</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="12" href="#12">12</a> <em class="comment"> * any later version.</em><a name="13" href="#13">13</a> <em class="comment"> * </em><a name="14" href="#14">14</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful, </em><a name="15" href="#15">15</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="16" href="#16">16</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="17" href="#17">17</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="18" href="#18">18</a> <em class="comment"> * </em><a name="19" href="#19">19</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="20" href="#20">20</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="21" href="#21">21</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="22" href="#22">22</a> <em class="comment"> */</em><a name="23" href="#23">23</a> <strong>package</strong> <a href="../../../../../org/archive/crawler/url/canonicalize/package-summary.html">org.archive.crawler.url.canonicalize</a>;<a name="24" href="#24">24</a> <a name="25" href="#25">25</a> <strong>import</strong> java.util.regex.Pattern;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <a name="28" href="#28">28</a> <a name="29" href="#29">29</a> <em>/**<em>*</em></em><a name="30" href="#30">30</a> <em> * Strip any 'www[0-9]*' found on http/https URLs IF they have some</em><a name="31" href="#31">31</a> <em> * path/query component (content after third slash). Top 'slash page' </em><a name="32" href="#32">32</a> <em> * URIs are left unstripped: we prefer crawling redundant</em><a name="33" href="#33">33</a> <em> * top pages to missing an entire site only available from either</em><a name="34" href="#34">34</a> <em> * the www-full or www-less hostname, but not both. </em><a name="35" href="#35">35</a> <em> * @author stack</em><a name="36" href="#36">36</a> <em> * @version $Date: 2006/09/18 20:42:56 $, $Revision: 1.2.6.1 $</em><a name="37" href="#37">37</a> <em> */</em><a name="38" href="#38">38</a> <strong>public</strong> <strong>class</strong> <a href="../../../../../org/archive/crawler/url/canonicalize/StripWWWNRule.html">StripWWWNRule</a> <strong>extends</strong> <a href="../../../../../org/archive/crawler/url/canonicalize/BaseRule.html">BaseRule</a> {<a name="39" href="#39">39</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> <strong>long</strong> serialVersionUID = 3619916990307308590L;<a name="40" href="#40">40</a> <a name="41" href="#41">41</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> String DESCRIPTION = <span class="string">"Strip any 'www[0-9]*' found. "</span> +<a name="42" href="#42">42</a> <span class="string">"Use this rule to equate 'http://www.archive.org/index.html' and "</span> +<a name="43" href="#43">43</a> <span class="string">"'http://www0001.archive.org/index.html' with "</span> +<a name="44" href="#44">44</a> <span class="string">"'http://archive.org/index.html'. The resulting canonicalization "</span> +<a name="45" href="#45">45</a> <span class="string">"returns 'http://archive.org/index.html'. It removes any www's "</span> +<a name="46" href="#46">46</a> <span class="string">"or wwwNNN's found, where 'N' is one or more numerics, EXCEPT "</span> +<a name="47" href="#47">47</a> <span class="string">"on URIs that have no path/query component "</span> +<a name="48" href="#48">48</a> <span class="string">". Top-level 'slash page' URIs are left unstripped: we prefer "</span> +<a name="49" href="#49">49</a> <span class="string">"crawling redundant top pages to missing an entire site only "</span> +<a name="50" href="#50">50</a> <span class="string">"available from either the www-full or www-less hostname, but not "</span> +<a name="51" href="#51">51</a> <span class="string">"both. Operates on http and https schemes only. "</span> +<a name="52" href="#52">52</a> <span class="string">"Use StripWWWRule to strip a lone 'www' only (This rule is a "</span> +<a name="53" href="#53">53</a> <span class="string">"more general version of StripWWWRule)."</span>;<a name="54" href="#54">54</a> <a name="55" href="#55">55</a> <strong>private</strong> <strong>static</strong> <strong>final</strong> Pattern REGEX =<a name="56" href="#56">56</a> Pattern.compile(<span class="string">"(?i)^(https?://)(?:www[0-9]*//.)([^/]*/.+)$"</span>);<a name="57" href="#57">57</a> <a name="58" href="#58">58</a> <strong>public</strong> <a href="../../../../../org/archive/crawler/url/canonicalize/StripWWWNRule.html">StripWWWNRule</a>(String name) {<a name="59" href="#59">59</a> <strong>super</strong>(name, DESCRIPTION);<a name="60" href="#60">60</a> }<a name="61" href="#61">61</a> <a name="62" href="#62">62</a> <strong>public</strong> String canonicalize(String url, Object context) {<a name="63" href="#63">63</a> <strong>return</strong> doStripRegexMatch(url, REGEX.matcher(url));<a name="64" href="#64">64</a> }<a name="65" href="#65">65</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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