crawlscope.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="163" href="#163">163</a>             DevUtils.warnHandle(e, <span class="string">"problem reading seeds"</span>);
<a name="164" href="#164">164</a>         } <strong>catch</strong> (MBeanException e) {
<a name="165" href="#165">165</a>             DevUtils.warnHandle(e, <span class="string">"problem reading seeds"</span>);
<a name="166" href="#166">166</a>             e.printStackTrace();
<a name="167" href="#167">167</a>         } <strong>catch</strong> (ReflectionException e) {
<a name="168" href="#168">168</a>             DevUtils.warnHandle(e, <span class="string">"problem reading seeds"</span>);
<a name="169" href="#169">169</a>             e.printStackTrace();
<a name="170" href="#170">170</a>         }
<a name="171" href="#171">171</a> 
<a name="172" href="#172">172</a>         <strong>return</strong> file;
<a name="173" href="#173">173</a>     }
<a name="174" href="#174">174</a> 
<a name="175" href="#175">175</a>     <em>/**<em>* Check if a URI is in the seeds.</em></em>
<a name="176" href="#176">176</a> <em>     *</em>
<a name="177" href="#177">177</a> <em>     * @param o the URI to check.</em>
<a name="178" href="#178">178</a> <em>     * @return true if URI is a seed.</em>
<a name="179" href="#179">179</a> <em>     */</em>
<a name="180" href="#180">180</a>     <strong>protected</strong> <strong>boolean</strong> isSeed(Object o) {
<a name="181" href="#181">181</a>         <strong>return</strong> o instanceof <a href="../../../../org/archive/crawler/datamodel/CandidateURI.html">CandidateURI</a> &amp;&amp; ((CandidateURI) o).isSeed();
<a name="182" href="#182">182</a>     }
<a name="183" href="#183">183</a> 
<a name="184" href="#184">184</a>     <em>/**<em>*</em></em>
<a name="185" href="#185">185</a> <em>     * @param a First UURI of compare.</em>
<a name="186" href="#186">186</a> <em>     * @param b Second UURI of compare.</em>
<a name="187" href="#187">187</a> <em>     * @return True if UURIs are of same host.</em>
<a name="188" href="#188">188</a> <em>     */</em>
<a name="189" href="#189">189</a>     <strong>protected</strong> <strong>boolean</strong> isSameHost(<a href="../../../../org/archive/net/UURI.html">UURI</a> a, <a href="../../../../org/archive/net/UURI.html">UURI</a> b) {
<a name="190" href="#190">190</a>         <strong>boolean</strong> isSameHost = false;
<a name="191" href="#191">191</a>         <strong>if</strong> (a != <strong>null</strong> &amp;&amp; b != <strong>null</strong>) {
<a name="192" href="#192">192</a>             <em class="comment">// getHost can come back null.  See</em>
<a name="193" href="#193">193</a>             <em class="comment">// "[ 910120 ] java.net.URI#getHost fails when leading digit"</em>
<a name="194" href="#194">194</a>             <strong>try</strong> {
<a name="195" href="#195">195</a>                 <strong>if</strong> (a.getReferencedHost() != <strong>null</strong> &amp;&amp; b.getReferencedHost() != <strong>null</strong>) {
<a name="196" href="#196">196</a>                     <strong>if</strong> (a.getReferencedHost().equals(b.getReferencedHost())) {
<a name="197" href="#197">197</a>                         isSameHost = <strong>true</strong>;
<a name="198" href="#198">198</a>                     }
<a name="199" href="#199">199</a>                 }
<a name="200" href="#200">200</a>             }
<a name="201" href="#201">201</a>             <strong>catch</strong> (URIException e) {
<a name="202" href="#202">202</a>                 logger.severe(<span class="string">"Failed compare of "</span> + a + <span class="string">" "</span> + b + <span class="string">": "</span> +
<a name="203" href="#203">203</a>                     e.getMessage());
<a name="204" href="#204">204</a>             }
<a name="205" href="#205">205</a>         }
<a name="206" href="#206">206</a>         <strong>return</strong> isSameHost;
<a name="207" href="#207">207</a>     }
<a name="208" href="#208">208</a> 
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a> 
<a name="211" href="#211">211</a>     <em class="comment">/*<em class="comment"> (non-Javadoc)</em></em>
<a name="212" href="#212">212</a> <em class="comment">     * @see org.archive.crawler.settings.ModuleType#listUsedFiles(java.util.List)</em>
<a name="213" href="#213">213</a> <em class="comment">     */</em>
<a name="214" href="#214">214</a>     <strong>public</strong> <strong>void</strong> listUsedFiles(List list){
<a name="215" href="#215">215</a>         <em class="comment">// Add seed file</em>
<a name="216" href="#216">216</a>         <strong>try</strong> {
<a name="217" href="#217">217</a>             File file = getSettingsHandler().getPathRelativeToWorkingDirectory(
<a name="218" href="#218">218</a>                     (String)getAttribute(ATTR_SEEDS));
<a name="219" href="#219">219</a>             list.add(file.getAbsolutePath());
<a name="220" href="#220">220</a>         } <strong>catch</strong> (AttributeNotFoundException e) {
<a name="221" href="#221">221</a>             <em class="comment">// TODO Auto-generated catch block</em>
<a name="222" href="#222">222</a>             e.printStackTrace();
<a name="223" href="#223">223</a>         } <strong>catch</strong> (MBeanException e) {
<a name="224" href="#224">224</a>             <em class="comment">// TODO Auto-generated catch block</em>
<a name="225" href="#225">225</a>             e.printStackTrace();
<a name="226" href="#226">226</a>         } <strong>catch</strong> (ReflectionException e) {
<a name="227" href="#227">227</a>             <em class="comment">// TODO Auto-generated catch block</em>
<a name="228" href="#228">228</a>             e.printStackTrace();
<a name="229" href="#229">229</a>         }
<a name="230" href="#230">230</a>     }
<a name="231" href="#231">231</a> 
<a name="232" href="#232">232</a>     <em>/**<em>*</em></em>
<a name="233" href="#233">233</a> <em>     * Take note of a situation (such as settings edit) where</em>
<a name="234" href="#234">234</a> <em>     * involved reconfiguration (such as reading from external</em>
<a name="235" href="#235">235</a> <em>     * files) may be necessary.</em>
<a name="236" href="#236">236</a> <em>     */</em>
<a name="237" href="#237">237</a>     <strong>public</strong> <strong>void</strong> kickUpdate() {
<a name="238" href="#238">238</a>         <em class="comment">// TODO: further improve this so that case with hundreds of</em>
<a name="239" href="#239">239</a>         <em class="comment">// thousands or millions of seeds works better without requiring</em>
<a name="240" href="#240">240</a>         <em class="comment">// this specific settings check </em>
<a name="241" href="#241">241</a>         <strong>if</strong> (((Boolean) getUncheckedAttribute(<strong>null</strong>, ATTR_REREAD_SEEDS_ON_CONFIG))
<a name="242" href="#242">242</a>                 .booleanValue()) {
<a name="243" href="#243">243</a>             refreshSeeds();
<a name="244" href="#244">244</a>             getSettingsHandler().getOrder().getController().getFrontier().loadSeeds();
<a name="245" href="#245">245</a>         }
<a name="246" href="#246">246</a>     }
<a name="247" href="#247">247</a> 
<a name="248" href="#248">248</a>     <em>/**<em>*</em></em>
<a name="249" href="#249">249</a> <em>     * Gets an iterator over all configured seeds. Subclasses</em>
<a name="250" href="#250">250</a> <em>     * which cache seeds in memory can override with more</em>
<a name="251" href="#251">251</a> <em>     * efficient implementation. </em>
<a name="252" href="#252">252</a> <em>     *</em>
<a name="253" href="#253">253</a> <em>     * @return Iterator, perhaps over a disk file, of seeds</em>
<a name="254" href="#254">254</a> <em>     */</em>
<a name="255" href="#255">255</a>     <strong>public</strong> Iterator seedsIterator() {
<a name="256" href="#256">256</a>         <strong>return</strong> seedsIterator(<strong>null</strong>);
<a name="257" href="#257">257</a>     }
<a name="258" href="#258">258</a>     
<a name="259" href="#259">259</a>     <em>/**<em>*</em></em>
<a name="260" href="#260">260</a> <em>     * Gets an iterator over all configured seeds. Subclasses</em>
<a name="261" href="#261">261</a> <em>     * which cache seeds in memory can override with more</em>
<a name="262" href="#262">262</a> <em>     * efficient implementation. </em>
<a name="263" href="#263">263</a> <em>     *</em>
<a name="264" href="#264">264</a> <em>     * @param ignoredItemWriter optional writer to get ignored seed items report</em>
<a name="265" href="#265">265</a> <em>     * @return Iterator, perhaps over a disk file, of seeds</em>
<a name="266" href="#266">266</a> <em>     */</em>
<a name="267" href="#267">267</a>     <strong>public</strong> Iterator seedsIterator(Writer ignoredItemWriter) {
<a name="268" href="#268">268</a>         BufferedReader br;
<a name="269" href="#269">269</a>         <strong>try</strong> {
<a name="270" href="#270">270</a>             br = <strong>new</strong> BufferedReader(<strong>new</strong> FileReader(getSeedfile()));
<a name="271" href="#271">271</a>         } <strong>catch</strong> (IOException e) {
<a name="272" href="#272">272</a>             <strong>throw</strong> <strong>new</strong> RuntimeException(e);
<a name="273" href="#273">273</a>         }
<a name="274" href="#274">274</a>         <strong>return</strong> <strong>new</strong> <a href="../../../../org/archive/crawler/scope/SeedFileIterator.html">SeedFileIterator</a>(br,ignoredItemWriter);
<a name="275" href="#275">275</a>     }
<a name="276" href="#276">276</a>     
<a name="277" href="#277">277</a>     <em>/**<em>*</em></em>
<a name="278" href="#278">278</a> <em>     * Convenience method to close SeedFileIterator, if appropriate.</em>
<a name="279" href="#279">279</a> <em>     * </em>
<a name="280" href="#280">280</a> <em>     * @param iter Iterator to check if SeedFileIterator needing closing</em>
<a name="281" href="#281">281</a> <em>     */</em>
<a name="282" href="#282">282</a>     <strong>protected</strong> <strong>void</strong> checkClose(Iterator iter) {
<a name="283" href="#283">283</a>         <strong>if</strong>(iter instanceof <a href="../../../../org/archive/crawler/scope/SeedFileIterator.html">SeedFileIterator</a>) {
<a name="284" href="#284">284</a>             ((<a href="../../../../org/archive/crawler/scope/SeedFileIterator.html">SeedFileIterator</a>)iter).close();
<a name="285" href="#285">285</a>         }
<a name="286" href="#286">286</a>     }
<a name="287" href="#287">287</a>     
<a name="288" href="#288">288</a>     <em>/**<em>*</em></em>
<a name="289" href="#289">289</a> <em>     * Add a new seed to scope. By default, simply appends</em>
<a name="290" href="#290">290</a> <em>     * to seeds file, though subclasses may handle differently.</em>
<a name="291" href="#291">291</a> <em>     *</em>
<a name="292" href="#292">292</a> <em>     * &lt;p>This method is *not* sufficient to get the new seed </em>
<a name="293" href="#293">293</a> <em>     * scheduled in the Frontier for crawling -- it only </em>
<a name="294" href="#294">294</a> <em>     * affects the Scope's seed record (and decisions which</em>
<a name="295" href="#295">295</a> <em>     * flow from seeds). </em>
<a name="296" href="#296">296</a> <em>     *</em>
<a name="297" href="#297">297</a> <em>     * @param curi CandidateUri to add</em>
<a name="298" href="#298">298</a> <em>     * @return true if successful, false if add failed for any reason</em>
<a name="299" href="#299">299</a> <em>     */</em>
<a name="300" href="#300">300</a>     <strong>public</strong> <strong>boolean</strong> addSeed(<strong>final</strong> <a href="../../../../org/archive/crawler/datamodel/CandidateURI.html">CandidateURI</a> curi) {
<a name="301" href="#301">301</a>         File f = getSeedfile();
<a name="302" href="#302">302</a>         <strong>if</strong> (f != <strong>null</strong>) {
<a name="303" href="#303">303</a>             <strong>try</strong> {
<a name="304" href="#304">304</a>                 FileWriter fw = <strong>new</strong> FileWriter(f, <strong>true</strong>);
<a name="305" href="#305">305</a>                 <em class="comment">// Write to new (last) line the URL.</em>
<a name="306" href="#306">306</a>                 fw.write(<span class="string">"\n"</span>);
<a name="307" href="#307">307</a>                 fw.write(<span class="string">"# Heritrix added seed "</span> +
<a name="308" href="#308">308</a>                     ((curi.getVia() != <strong>null</strong>) ? <span class="string">"redirect from "</span> + curi.getVia():
<a name="309" href="#309">309</a>                         <span class="string">"(JMX)"</span>) + <span class="string">".\n"</span>);
<a name="310" href="#310">310</a>                 fw.write(curi.toString());
<a name="311" href="#311">311</a>                 fw.flush();
<a name="312" href="#312">312</a>                 fw.close();
<a name="313" href="#313">313</a>                 Iterator iter = seedListeners.iterator();
<a name="314" href="#314">314</a>                 <strong>while</strong>(iter.hasNext()) {
<a name="315" href="#315">315</a>                     ((<a href="../../../../org/archive/crawler/scope/SeedListener.html">SeedListener</a>)iter.next()).addedSeed(curi);
<a name="316" href="#316">316</a>                 }
<a name="317" href="#317">317</a>                 <strong>return</strong> <strong>true</strong>;
<a name="318" href="#318">318</a>             } <strong>catch</strong> (IOException e) {
<a name="319" href="#319">319</a>                 DevUtils.warnHandle(e, <span class="string">"problem writing new seed"</span>);
<a name="320" href="#320">320</a>             }
<a name="321" href="#321">321</a>         }
<a name="322" href="#322">322</a>         <strong>return</strong> false; 
<a name="323" href="#323">323</a>     }
<a name="324" href="#324">324</a>     
<a name="325" href="#325">325</a>     <strong>public</strong> <strong>void</strong> addSeedListener(<a href="../../../../org/archive/crawler/scope/SeedListener.html">SeedListener</a> sl) {
<a name="326" href="#326">326</a>         seedListeners.add(sl);
<a name="327" href="#327">327</a>     }
<a name="328" href="#328">328</a> }
</pre>
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