scopeplusonedeciderule.html

用JAVA编写的,在做实验的时候留下来的,本来想删的,但是传上来,大家分享吧

<a name="97" href="#97">97</a>                  <em class="comment">// If there is no via and the URL doesn't match scope,reject it</em>
<a name="98" href="#98">98</a>                  <strong>return</strong> false;
<a name="99" href="#99">99</a>              }
<a name="100" href="#100">100</a>             <em class="comment">// If the via is within scope, accept it</em>
<a name="101" href="#101">101</a>             result = isInScope (via, set);
<a name="102" href="#102">102</a>             <strong>if</strong> (logger.isLoggable(Level.FINE)) {
<a name="103" href="#103">103</a>                 logger.fine(<span class="string">"Tested via UURI '"</span> + via +
<a name="104" href="#104">104</a>                         <span class="string">" and result was "</span> + result);
<a name="105" href="#105">105</a>             }            
<a name="106" href="#106">106</a>         }
<a name="107" href="#107">107</a>         <strong>return</strong> result;
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a>     
<a name="110" href="#110">110</a>     <em>/**<em>*</em></em>
<a name="111" href="#111">111</a> <em>     * Synchronized get of prefix set to use</em>
<a name="112" href="#112">112</a> <em>     * </em>
<a name="113" href="#113">113</a> <em>     * @return SurtPrefixSet to use for check</em>
<a name="114" href="#114">114</a> <em>     *@see org.archive.crawler.deciderules.SurtPrefixedDecideRule#getPrefixes()</em>
<a name="115" href="#115">115</a> <em>     */</em>
<a name="116" href="#116">116</a>     <strong>protected</strong> <strong>synchronized</strong> <a href="../../../../org/archive/util/SurtPrefixSet.html">SurtPrefixSet</a> getPrefixes() {
<a name="117" href="#117">117</a>         <strong>return</strong> getPrefixes(<strong>null</strong>);
<a name="118" href="#118">118</a>     } 
<a name="119" href="#119">119</a>     
<a name="120" href="#120">120</a>     <em>/**<em>*</em></em>
<a name="121" href="#121">121</a> <em>     * Synchronized get of prefix set to use.</em>
<a name="122" href="#122">122</a> <em>     * @param o Context object.</em>
<a name="123" href="#123">123</a> <em>     * </em>
<a name="124" href="#124">124</a> <em>     * @return SurtPrefixSet to use for check</em>
<a name="125" href="#125">125</a> <em>     * @see org.archive.crawler.deciderules.SurtPrefixedDecideRule#getPrefixes()</em>
<a name="126" href="#126">126</a> <em>     */</em>
<a name="127" href="#127">127</a>     <strong>protected</strong> <strong>synchronized</strong> <a href="../../../../org/archive/util/SurtPrefixSet.html">SurtPrefixSet</a> getPrefixes(Object o) {
<a name="128" href="#128">128</a>         <strong>if</strong> (surtPrefixes == <strong>null</strong>) {
<a name="129" href="#129">129</a>             readPrefixes(o);
<a name="130" href="#130">130</a>         }
<a name="131" href="#131">131</a>         <strong>return</strong> surtPrefixes;
<a name="132" href="#132">132</a>     }    
<a name="133" href="#133">133</a>     
<a name="134" href="#134">134</a>     <em>/**<em>*</em></em>
<a name="135" href="#135">135</a> <em>     * Patch the SURT prefix set so that it only includes the appropriate</em>
<a name="136" href="#136">136</a> <em>     * prefixes.</em>
<a name="137" href="#137">137</a> <em>     * @param o Context object.</em>
<a name="138" href="#138">138</a> <em>     * @see org.archive.crawler.deciderules.SurtPrefixedDecideRule#readPrefixes()</em>
<a name="139" href="#139">139</a> <em>     */</em>
<a name="140" href="#140">140</a>     <strong>protected</strong> <strong>void</strong> readPrefixes(Object o) {
<a name="141" href="#141">141</a>         buildSurtPrefixSet();
<a name="142" href="#142">142</a>         <em class="comment">// See whether Host or Domain was chosen</em>
<a name="143" href="#143">143</a>         String scope = <strong>this</strong>.getScope(o);
<a name="144" href="#144">144</a>         <strong>if</strong> (scope.equals(HOST)){
<a name="145" href="#145">145</a>             surtPrefixes.convertAllPrefixesToHosts();            
<a name="146" href="#146">146</a>         } <strong>else</strong> <strong>if</strong> (scope.equals(DOMAIN)) {
<a name="147" href="#147">147</a>             surtPrefixes.convertAllPrefixesToDomains();            
<a name="148" href="#148">148</a>         }
<a name="149" href="#149">149</a>         dumpSurtPrefixSet();
<a name="150" href="#150">150</a>     }        
<a name="151" href="#151">151</a>     
<a name="152" href="#152">152</a>     <strong>private</strong> <a href="../../../../org/archive/net/UURI.html">UURI</a> getVia(Object o){
<a name="153" href="#153">153</a>         <strong>return</strong> (o instanceof CandidateURI)? ((CandidateURI)o).getVia(): <strong>null</strong>;
<a name="154" href="#154">154</a>     }    
<a name="155" href="#155">155</a> 
<a name="156" href="#156">156</a>     <em>/**<em>*</em></em>
<a name="157" href="#157">157</a> <em>     * Decide whether using host or domain scope</em>
<a name="158" href="#158">158</a> <em>     * @param o Context</em>
<a name="159" href="#159">159</a> <em>     * @return String Host or domain</em>
<a name="160" href="#160">160</a> <em>     * </em>
<a name="161" href="#161">161</a> <em>     */</em>
<a name="162" href="#162">162</a>     <strong>protected</strong> String getScope(Object o) {
<a name="163" href="#163">163</a>         <strong>try</strong> {
<a name="164" href="#164">164</a>             String scope = (String)getAttribute(o, ATTR_SCOPE);
<a name="165" href="#165">165</a>             <strong>if</strong> (scope.equals(HOST)) {
<a name="166" href="#166">166</a>                 <strong>return</strong> HOST;
<a name="167" href="#167">167</a>             } <strong>else</strong> <strong>if</strong> (scope.equals(DOMAIN)) {
<a name="168" href="#168">168</a>                 <strong>return</strong> DOMAIN;
<a name="169" href="#169">169</a>             } <strong>else</strong> {
<a name="170" href="#170">170</a>                 assert false : <span class="string">"Unrecognized scope "</span> + scope
<a name="171" href="#171">171</a>                         + <span class="string">". Should never happen!"</span>;
<a name="172" href="#172">172</a>             }
<a name="173" href="#173">173</a>         } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="174" href="#174">174</a>             logger.severe(e.getMessage());
<a name="175" href="#175">175</a>         }
<a name="176" href="#176">176</a>         <strong>return</strong> <strong>null</strong>; <em class="comment">// Basically the rule is inactive if this occurs.</em>
<a name="177" href="#177">177</a>     }
<a name="178" href="#178">178</a>     
<a name="179" href="#179">179</a>     <em class="comment">//check that the URI is in scope</em>
<a name="180" href="#180">180</a>     <strong>private</strong> <strong>boolean</strong> isInScope (Object o, SurtPrefixSet set) {
<a name="181" href="#181">181</a>         <strong>boolean</strong> iResult = false;
<a name="182" href="#182">182</a>         <a href="../../../../org/archive/net/UURI.html">UURI</a> u = (UURI)o;
<a name="183" href="#183">183</a>         <strong>if</strong> (u == <strong>null</strong>) {
<a name="184" href="#184">184</a>             <strong>return</strong> false;
<a name="185" href="#185">185</a>         }
<a name="186" href="#186">186</a>         String candidateSurt = u.getSurtForm();
<a name="187" href="#187">187</a>         <em class="comment">// also want to treat https as http</em>
<a name="188" href="#188">188</a>         <strong>if</strong> (candidateSurt.startsWith(<span class="string">"https:"</span>)) {
<a name="189" href="#189">189</a>             candidateSurt = <span class="string">"http:"</span> + candidateSurt.substring(6);
<a name="190" href="#190">190</a>         }
<a name="191" href="#191">191</a>         <strong>if</strong> (set.containsPrefixOf(candidateSurt)){
<a name="192" href="#192">192</a>             iResult = <strong>true</strong>;          
<a name="193" href="#193">193</a>         }
<a name="194" href="#194">194</a>         <strong>return</strong> iResult;
<a name="195" href="#195">195</a>     }
<a name="196" href="#196">196</a> }
</pre>
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