arc2wcdx.html
来自「网络爬虫开源代码」· HTML 代码 · 共 263 行 · 第 1/2 页
HTML
263 行
<!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>ARC2WCDX xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/archive/io/arc/ARC2WCDX.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*</em><a name="2" href="#2">2</a> <em class="comment"> * ARC2WCDX.java</em><a name="3" href="#3">3</a> <em class="comment"> *</em><a name="4" href="#4">4</a> <em class="comment"> * $Id: ARC2WCDX.java 4903 2007-02-16 01:45:10Z gojomo $</em><a name="5" href="#5">5</a> <em class="comment"> *</em><a name="6" href="#6">6</a> <em class="comment"> * Created on Nov 13, 2006</em><a name="7" href="#7">7</a> <em class="comment"> *</em><a name="8" href="#8">8</a> <em class="comment"> * Copyright (C) 2006 Internet Archive.</em><a name="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * This file is part of the Heritrix web crawler (crawler.archive.org).</em><a name="11" href="#11">11</a> <em class="comment"> *</em><a name="12" href="#12">12</a> <em class="comment"> * Heritrix is free software; you can redistribute it and/or modify</em><a name="13" href="#13">13</a> <em class="comment"> * it under the terms of the GNU Lesser Public License as published by</em><a name="14" href="#14">14</a> <em class="comment"> * the Free Software Foundation; either version 2.1 of the License, or</em><a name="15" href="#15">15</a> <em class="comment"> * any later version.</em><a name="16" href="#16">16</a> <em class="comment"> *</em><a name="17" href="#17">17</a> <em class="comment"> * Heritrix is distributed in the hope that it will be useful,</em><a name="18" href="#18">18</a> <em class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</em><a name="19" href="#19">19</a> <em class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</em><a name="20" href="#20">20</a> <em class="comment"> * GNU Lesser Public License for more details.</em><a name="21" href="#21">21</a> <em class="comment"> *</em><a name="22" href="#22">22</a> <em class="comment"> * You should have received a copy of the GNU Lesser Public License</em><a name="23" href="#23">23</a> <em class="comment"> * along with Heritrix; if not, write to the Free Software</em><a name="24" href="#24">24</a> <em class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</em><a name="25" href="#25">25</a> <em class="comment"> */</em><a name="26" href="#26">26</a> <strong>package</strong> <a href="../../../../org/archive/io/arc/package-summary.html">org.archive.io.arc</a>;<a name="27" href="#27">27</a> <a name="28" href="#28">28</a> <strong>import</strong> java.io.File;<a name="29" href="#29">29</a> <strong>import</strong> java.io.FileOutputStream;<a name="30" href="#30">30</a> <strong>import</strong> java.io.IOException;<a name="31" href="#31">31</a> <strong>import</strong> java.io.PrintStream;<a name="32" href="#32">32</a> <strong>import</strong> java.util.Date;<a name="33" href="#33">33</a> <strong>import</strong> java.util.Iterator;<a name="34" href="#34">34</a> <strong>import</strong> java.util.zip.GZIPOutputStream;<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <strong>import</strong> org.apache.commons.httpclient.Header;<a name="37" href="#37">37</a> <strong>import</strong> org.apache.commons.httpclient.HeaderGroup;<a name="38" href="#38">38</a> <strong>import</strong> org.apache.commons.httpclient.util.DateParseException;<a name="39" href="#39">39</a> <strong>import</strong> org.apache.commons.httpclient.util.DateUtil;<a name="40" href="#40">40</a> <strong>import</strong> org.archive.util.ArchiveUtils;<a name="41" href="#41">41</a> <strong>import</strong> org.archive.util.SURT;<a name="42" href="#42">42</a> <a name="43" href="#43">43</a> <em>/**<em>*</em></em><a name="44" href="#44">44</a> <em> * Create a 'Wide' CDX from an ARC. Takes one argument, the path to the ARC.</em><a name="45" href="#45">45</a> <em> * Writes .wcdx.gz in same directory.</em><a name="46" href="#46">46</a> <em> *</em><a name="47" href="#47">47</a> <em> * @author gojomo</em><a name="48" href="#48">48</a> <em> */</em><a name="49" href="#49">49</a> <strong>public</strong> <strong>class</strong> ARC2WCDX {<a name="50" href="#50">50</a> <strong>final</strong> <strong>public</strong> <strong>static</strong> String WCDX_VERSION=<span class="string">"0.1"</span>;<a name="51" href="#51">51</a> <a name="52" href="#52">52</a> <strong>public</strong> <strong>static</strong> <strong>void</strong> main(String[] args) throws IOException {<a name="53" href="#53">53</a> String arcFilename = args[0];<a name="54" href="#54">54</a> createWcdx(arcFilename);<a name="55" href="#55">55</a> }<a name="56" href="#56">56</a> <a name="57" href="#57">57</a> <strong>public</strong> <strong>static</strong> Object[] createWcdx(String arcFilename) throws IOException {<a name="58" href="#58">58</a> <a href="../../../../org/archive/io/arc/ARCReader.html">ARCReader</a> reader = ARCReaderFactory.get(arcFilename);<a name="59" href="#59">59</a> Object[] retVal = createWcdx(reader);<a name="60" href="#60">60</a> reader.close();<a name="61" href="#61">61</a> <strong>return</strong> retVal; <a name="62" href="#62">62</a> }<a name="63" href="#63">63</a> <a name="64" href="#64">64</a> <strong>public</strong> <strong>static</strong> Object[] createWcdx(<a href="../../../../org/archive/io/arc/ARCReader.html">ARCReader</a> reader) {<a name="65" href="#65">65</a> reader.setDigest(<strong>true</strong>);<a name="66" href="#66">66</a> <a name="67" href="#67">67</a> String wcdxPath = reader.getReaderIdentifier().replaceAll(<span class="string">"//.arc(//.gz)?$"</span>,<span class="string">".wcdx.gz"</span>);<a name="68" href="#68">68</a> File wcdxFile = <strong>new</strong> File(wcdxPath+<span class="string">".open"</span>);<a name="69" href="#69">69</a> PrintStream writer = <strong>null</strong>;<a name="70" href="#70">70</a> <strong>long</strong> count = 0;<a name="71" href="#71">71</a> <strong>try</strong> {<a name="72" href="#72">72</a> writer = <strong>new</strong> PrintStream(<strong>new</strong> GZIPOutputStream(<strong>new</strong> FileOutputStream(wcdxFile)));<a name="73" href="#73">73</a> <a name="74" href="#74">74</a> <em class="comment">// write header: legend + timestamp</em><a name="75" href="#75">75</a> StringBuilder legend = <strong>new</strong> StringBuilder();<a name="76" href="#76">76</a> appendField(legend,<span class="string">"CDX"</span>);<a name="77" href="#77">77</a> appendField(legend,<span class="string">"surt-uri"</span>);<a name="78" href="#78">78</a> appendField(legend,<span class="string">"b"</span>); <em class="comment">// ARC timestamp</em><a name="79" href="#79">79</a> appendField(legend,<span class="string">"http-date"</span>);<a name="80" href="#80">80</a> appendField(legend,<span class="string">"s"</span>); <em class="comment">// status code</em><a name="81" href="#81">81</a> appendField(legend,<span class="string">"m"</span>); <em class="comment">// media type</em><a name="82" href="#82">82</a> appendField(legend,<span class="string">"sha1"</span>); <em class="comment">// content sha1</em><a name="83" href="#83">83</a> appendField(legend,<span class="string">"g"</span>); <em class="comment">// ARC name</em><a name="84" href="#84">84</a> appendField(legend,<span class="string">"V"</span>); <em class="comment">// start offset</em><a name="85" href="#85">85</a> appendField(legend,<span class="string">"end-offset"</span>); <em class="comment">// TODO: implement</em><a name="86" href="#86">86</a> appendField(legend,<span class="string">"n"</span>); <em class="comment">// ARC record length TODO: verify</em><a name="87" href="#87">87</a> appendField(legend,<span class="string">"http-content-length"</span>);<a name="88" href="#88">88</a> appendField(legend,<span class="string">"http-last-modified"</span>);<a name="89" href="#89">89</a> appendField(legend,<span class="string">"http-expires"</span>);<a name="90" href="#90">90</a> appendField(legend,<span class="string">"http-etag"</span>);<a name="91" href="#91">91</a> appendField(legend,<span class="string">"http-location"</span>);<a name="92" href="#92">92</a> appendField(legend,<span class="string">"e"</span>); <em class="comment">// IP</em><a name="93" href="#93">93</a> appendField(legend,<span class="string">"a"</span>); <em class="comment">// original URL</em><a name="94" href="#94">94</a> <em class="comment">// WCDX version+creation time: crude version control</em><a name="95" href="#95">95</a> appendField(legend,WCDX_VERSION+<span class="string">"@"</span>+ArchiveUtils.get14DigitDate());<a name="96" href="#96">96</a> writer.println(legend.toString());<a name="97" href="#97">97</a> <a name="98" href="#98">98</a> Iterator iter = reader.iterator();<a name="99" href="#99">99</a> count = 0; <a name="100" href="#100">100</a> <strong>while</strong>(iter.hasNext()) {<a name="101" href="#101">101</a> <a href="../../../../org/archive/io/arc/ARCRecord.html">ARCRecord</a> record = (ARCRecord) iter.next();<a name="102" href="#102">102</a> record.close();<a name="103" href="#103">103</a> <a href="../../../../org/archive/io/arc/ARCRecordMetaData.html">ARCRecordMetaData</a> h = (ARCRecordMetaData) record.getHeader();<a name="104" href="#104">104</a> Header[] httpHeaders = record.getHttpHeaders();<a name="105" href="#105">105</a> <strong>if</strong>(httpHeaders==<strong>null</strong>) {<a name="106" href="#106">106</a> httpHeaders = <strong>new</strong> Header[0];<a name="107" href="#107">107</a> }<a name="108" href="#108">108</a> HeaderGroup hg = <strong>new</strong> HeaderGroup();<a name="109" href="#109">109</a> hg.setHeaders(httpHeaders);<a name="110" href="#110">110</a> StringBuilder builder = <strong>new</strong> StringBuilder();<a name="111" href="#111">111</a> <a name="112" href="#112">112</a> <em class="comment">// SURT-form URI</em><a name="113" href="#113">113</a> appendField(builder,SURT.fromURI(h.getUrl()));<a name="114" href="#114">114</a> <em class="comment">// record timestamp ('b')</em><a name="115" href="#115">115</a> appendField(builder,h.getDate());<a name="116" href="#116">116</a> <em class="comment">// http header date</em><a name="117" href="#117">117</a> appendTimeField(builder,hg.getFirstHeader(<span class="string">"Date"</span>));<a name="118" href="#118">118</a> <em class="comment">// response code ('s')</em><a name="119" href="#119">119</a> appendField(builder,h.getStatusCode());<a name="120" href="#120">120</a> <em class="comment">// media type ('m')</em><a name="121" href="#121">121</a> appendField(builder,h.getMimetype());<a name="122" href="#122">122</a> <em class="comment">// content checksum (like 'c', but here Base32 SHA1)</em><a name="123" href="#123">123</a> appendField(builder,record.getDigestStr());⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?