experimentalwarcwriter.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="304" href="#304">304</a>     	<strong>return</strong> rid;
<a name="305" href="#305">305</a>     }
<a name="306" href="#306">306</a>     
<a name="307" href="#307">307</a>     <strong>public</strong> URI writeWarcinfoRecord(String filename)
<a name="308" href="#308">308</a> 	throws IOException {
<a name="309" href="#309">309</a>     	<strong>return</strong> writeWarcinfoRecord(filename, <strong>null</strong>);
<a name="310" href="#310">310</a>     }
<a name="311" href="#311">311</a>     
<a name="312" href="#312">312</a>     <strong>public</strong> URI writeWarcinfoRecord(String filename, <strong>final</strong> String description)
<a name="313" href="#313">313</a>         	throws IOException {
<a name="314" href="#314">314</a>         <em class="comment">// Strip .open suffix if present.</em>
<a name="315" href="#315">315</a>         <strong>if</strong> (filename.endsWith(WriterPoolMember.OCCUPIED_SUFFIX)) {
<a name="316" href="#316">316</a>         	filename = filename.substring(0,
<a name="317" href="#317">317</a>         		filename.length() - WriterPoolMember.OCCUPIED_SUFFIX.length());
<a name="318" href="#318">318</a>         }
<a name="319" href="#319">319</a>         <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> record = <strong>new</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a>(2);
<a name="320" href="#320">320</a>         record.addLabelValue(NAMED_FIELD_WARCFILENAME, filename);
<a name="321" href="#321">321</a>         <strong>if</strong> (description != <strong>null</strong> &amp;&amp; description.length() > 0) {
<a name="322" href="#322">322</a>         	record.addLabelValue(NAMED_FIELD_DESCRIPTION, description);
<a name="323" href="#323">323</a>         }
<a name="324" href="#324">324</a>         <em class="comment">// Add warcinfo body.</em>
<a name="325" href="#325">325</a>         byte [] warcinfoBody = <strong>null</strong>;
<a name="326" href="#326">326</a>         <strong>if</strong> (<strong>this</strong>.fileMetadata == <strong>null</strong>) {
<a name="327" href="#327">327</a>         	<em class="comment">// TODO: What to write into a warcinfo?  What to associate?</em>
<a name="328" href="#328">328</a>         	warcinfoBody = <span class="string">"TODO: Unimplemented"</span>.getBytes();
<a name="329" href="#329">329</a>         } <strong>else</strong> {
<a name="330" href="#330">330</a>         	ByteArrayOutputStream baos = <strong>new</strong> ByteArrayOutputStream();
<a name="331" href="#331">331</a>         	<strong>for</strong> (<strong>final</strong> Iterator i = <strong>this</strong>.fileMetadata.iterator();
<a name="332" href="#332">332</a>         			i.hasNext();) {
<a name="333" href="#333">333</a>         		baos.write(i.next().toString().getBytes(UTF8Bytes.UTF8));
<a name="334" href="#334">334</a>         	}
<a name="335" href="#335">335</a>         	warcinfoBody = baos.toByteArray();
<a name="336" href="#336">336</a>         }
<a name="337" href="#337">337</a>         URI uri = writeWarcinfoRecord(<span class="string">"text/plain"</span>, record,
<a name="338" href="#338">338</a>             <strong>new</strong> ByteArrayInputStream(warcinfoBody), warcinfoBody.length);
<a name="339" href="#339">339</a>         <em class="comment">// TODO: If at start of file, and we're writing compressed,</em>
<a name="340" href="#340">340</a>         <em class="comment">// write out our distinctive GZIP extensions.</em>
<a name="341" href="#341">341</a>         <strong>return</strong> uri;
<a name="342" href="#342">342</a>     }
<a name="343" href="#343">343</a>     
<a name="344" href="#344">344</a>     <em>/**<em>*</em></em>
<a name="345" href="#345">345</a> <em>     * Write a warcinfo to current file.</em>
<a name="346" href="#346">346</a> <em>     * TODO: Write crawl metadata or pointers to crawl description.</em>
<a name="347" href="#347">347</a> <em>     * @param mimetype Mimetype of the &lt;code>fileMetadata&lt;/code> block.</em>
<a name="348" href="#348">348</a> <em>     * @param namedFields Named fields. Pass &lt;code>null&lt;/code> if none.</em>
<a name="349" href="#349">349</a> <em>     * @param fileMetadata Metadata about this WARC as RDF, ANVL, etc.</em>
<a name="350" href="#350">350</a> <em>     * @param fileMetadataLength Length of &lt;code>fileMetadata&lt;/code>.</em>
<a name="351" href="#351">351</a> <em>     * @throws IOException</em>
<a name="352" href="#352">352</a> <em>     * @return Generated record-id made with</em>
<a name="353" href="#353">353</a> <em>     * &lt;a href="<a href="http://en.wikipedia.org/wiki/Data:_URL" target="alexandria_uri">http://en.wikipedia.org/wiki/Data:_URL</a>">data: scheme&lt;/a> and</em>
<a name="354" href="#354">354</a> <em>     * the current filename.</em>
<a name="355" href="#355">355</a> <em>     */</em>
<a name="356" href="#356">356</a>     <strong>public</strong> URI writeWarcinfoRecord(<strong>final</strong> String mimetype,
<a name="357" href="#357">357</a>     	<strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream fileMetadata,
<a name="358" href="#358">358</a>     	<strong>final</strong> <strong>long</strong> fileMetadataLength)
<a name="359" href="#359">359</a>     throws IOException {
<a name="360" href="#360">360</a>     	<strong>final</strong> URI recordid = generateRecordId(TYPE, WARCINFO);
<a name="361" href="#361">361</a>     	writeWarcinfoRecord(ArchiveUtils.get14DigitDate(), mimetype, recordid,
<a name="362" href="#362">362</a>             namedFields, fileMetadata, fileMetadataLength);
<a name="363" href="#363">363</a>     	<strong>return</strong> recordid;
<a name="364" href="#364">364</a>     }
<a name="365" href="#365">365</a>     
<a name="366" href="#366">366</a>     <em>/**<em>*</em></em>
<a name="367" href="#367">367</a> <em>     * Write a &lt;code>warcinfo&lt;/code> to current file.</em>
<a name="368" href="#368">368</a> <em>     * The &lt;code>warcinfo&lt;/code> type uses its &lt;code>recordId&lt;/code> as its URL.</em>
<a name="369" href="#369">369</a> <em>     * @param recordId URI to use for this warcinfo.</em>
<a name="370" href="#370">370</a> <em>     * @param create14DigitDate Record creation date as 14 digit date.</em>
<a name="371" href="#371">371</a> <em>     * @param mimetype Mimetype of the &lt;code>fileMetadata&lt;/code>.</em>
<a name="372" href="#372">372</a> <em>     * @param namedFields Named fields.</em>
<a name="373" href="#373">373</a> <em>     * @param fileMetadata Metadata about this WARC as RDF, ANVL, etc.</em>
<a name="374" href="#374">374</a> <em>     * @param fileMetadataLength Length of &lt;code>fileMetadata&lt;/code>.</em>
<a name="375" href="#375">375</a> <em>     * @throws IOException</em>
<a name="376" href="#376">376</a> <em>     */</em>
<a name="377" href="#377">377</a>     <strong>public</strong> <strong>void</strong> writeWarcinfoRecord(<strong>final</strong> String create14DigitDate,
<a name="378" href="#378">378</a>         <strong>final</strong> String mimetype, <strong>final</strong> URI recordId, <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields,
<a name="379" href="#379">379</a>     	<strong>final</strong> InputStream fileMetadata, <strong>final</strong> <strong>long</strong> fileMetadataLength)
<a name="380" href="#380">380</a>     throws IOException {
<a name="381" href="#381">381</a>     	writeRecord(WARCINFO, recordId.toString(), create14DigitDate, mimetype,
<a name="382" href="#382">382</a>         	recordId, namedFields, fileMetadata, fileMetadataLength);
<a name="383" href="#383">383</a>     }
<a name="384" href="#384">384</a>     
<a name="385" href="#385">385</a>     <strong>public</strong> <strong>void</strong> writeRequestRecord(<strong>final</strong> String url,
<a name="386" href="#386">386</a>         <strong>final</strong> String create14DigitDate, <strong>final</strong> String mimetype,
<a name="387" href="#387">387</a>         <strong>final</strong> URI recordId,
<a name="388" href="#388">388</a>         <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream request,
<a name="389" href="#389">389</a>         <strong>final</strong> <strong>long</strong> requestLength)
<a name="390" href="#390">390</a>     throws IOException {
<a name="391" href="#391">391</a>         writeRecord(REQUEST, url, create14DigitDate,
<a name="392" href="#392">392</a>             mimetype, recordId, namedFields, request,
<a name="393" href="#393">393</a>             requestLength);
<a name="394" href="#394">394</a>     }
<a name="395" href="#395">395</a>     
<a name="396" href="#396">396</a>     <strong>public</strong> <strong>void</strong> writeResourceRecord(<strong>final</strong> String url,
<a name="397" href="#397">397</a>             <strong>final</strong> String create14DigitDate, <strong>final</strong> String mimetype,
<a name="398" href="#398">398</a>             <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream response,
<a name="399" href="#399">399</a>             <strong>final</strong> <strong>long</strong> responseLength)
<a name="400" href="#400">400</a>     throws IOException {
<a name="401" href="#401">401</a>     	writeResourceRecord(url, create14DigitDate, mimetype, getRecordID(),
<a name="402" href="#402">402</a>     			namedFields, response, responseLength);
<a name="403" href="#403">403</a>     }
<a name="404" href="#404">404</a>     
<a name="405" href="#405">405</a>     <strong>public</strong> <strong>void</strong> writeResourceRecord(<strong>final</strong> String url,
<a name="406" href="#406">406</a>             <strong>final</strong> String create14DigitDate, <strong>final</strong> String mimetype,
<a name="407" href="#407">407</a>             <strong>final</strong> URI recordId,
<a name="408" href="#408">408</a>             <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream response,
<a name="409" href="#409">409</a>             <strong>final</strong> <strong>long</strong> responseLength)
<a name="410" href="#410">410</a>     throws IOException {
<a name="411" href="#411">411</a>         writeRecord(RESOURCE, url, create14DigitDate,
<a name="412" href="#412">412</a>             mimetype, recordId, namedFields, response,
<a name="413" href="#413">413</a>             responseLength);
<a name="414" href="#414">414</a>     }
<a name="415" href="#415">415</a> 
<a name="416" href="#416">416</a>     <strong>public</strong> <strong>void</strong> writeResponseRecord(<strong>final</strong> String url,
<a name="417" href="#417">417</a>             <strong>final</strong> String create14DigitDate, <strong>final</strong> String mimetype,
<a name="418" href="#418">418</a>             <strong>final</strong> URI recordId,
<a name="419" href="#419">419</a>             <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream response,
<a name="420" href="#420">420</a>             <strong>final</strong> <strong>long</strong> responseLength)
<a name="421" href="#421">421</a>     throws IOException {
<a name="422" href="#422">422</a>         writeRecord(RESPONSE, url, create14DigitDate,
<a name="423" href="#423">423</a>             mimetype, recordId, namedFields, response,
<a name="424" href="#424">424</a>             responseLength);
<a name="425" href="#425">425</a>     }
<a name="426" href="#426">426</a>     
<a name="427" href="#427">427</a>     <strong>public</strong> <strong>void</strong> writeMetadataRecord(<strong>final</strong> String url,
<a name="428" href="#428">428</a>             <strong>final</strong> String create14DigitDate, <strong>final</strong> String mimetype,
<a name="429" href="#429">429</a>             <strong>final</strong> URI recordId,
<a name="430" href="#430">430</a>             <strong>final</strong> <a href="../../../../org/archive/util/anvl/ANVLRecord.html">ANVLRecord</a> namedFields, <strong>final</strong> InputStream metadata,
<a name="431" href="#431">431</a>             <strong>final</strong> <strong>long</strong> metadataLength)
<a name="432" href="#432">432</a>     throws IOException {
<a name="433" href="#433">433</a>         writeRecord(METADATA, url, create14DigitDate,
<a name="434" href="#434">434</a>             mimetype, recordId, namedFields, metadata,
<a name="435" href="#435">435</a>             metadataLength);
<a name="436" href="#436">436</a>     }
<a name="437" href="#437">437</a>     
<a name="438" href="#438">438</a>     <em>/**<em>*</em></em>
<a name="439" href="#439">439</a> <em>     * Convenience method for getting Record-Ids.</em>
<a name="440" href="#440">440</a> <em>     * @return A record ID.</em>
<a name="441" href="#441">441</a> <em>     * @throws IOException</em>
<a name="442" href="#442">442</a> <em>     */</em>
<a name="443" href="#443">443</a>     <strong>public</strong> <strong>static</strong> URI getRecordID() throws IOException {
<a name="444" href="#444">444</a>         URI result;
<a name="445" href="#445">445</a>         <strong>try</strong> {
<a name="446" href="#446">446</a>             result = GeneratorFactory.getFactory().getRecordID();
<a name="447" href="#447">447</a>         } <strong>catch</strong> (URISyntaxException e) {
<a name="448" href="#448">448</a>             <strong>throw</strong> <strong>new</strong> IOException(e.toString());
<a name="449" href="#449">449</a>         }
<a name="450" href="#450">450</a>         <strong>return</strong> result;
<a name="451" href="#451">451</a>     }
<a name="452" href="#452">452</a> }
</pre>
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