Re: opensearchservlet - HowTo ?

[Philip Brown]

Andrzej Bialecki wrote:
Michael Wechner wrote:
Sandy Polanski wrote:
I second that.  Is there anyone that can give us some tips on how to 
use the OpenSearchServlet?  I'd really like to see a standalone Java 
program that would allow me to see the results in RSS format that I 
can call from the "./bin/nutch" executable.
 


I guess the bin/nutch resp. some other program (maybe based on 
NutchBean) should return a RSS feed which then can be pulled/parsed 
by the OpenSearchServlet. The question is does something like this 
already exist within Nutch and if not is somebody writing something 
like this
(for instance myself ;-) but I would rather wait if somebody might 
answer the "exist" question ...


Folks,

As the name itself suggests, the servlet needs a servlet container to 
run. If you build a standard WAR you will get among others the 
OpenSearchServlet included in the WAR, under <contextPath>/opensearch. 
Deploy this WAR to your favorite servlet container, e.g. Tomcat, and 
you are ready to go.

This is a REST-type service, which means that you send it requests as 
standard HTTP GET-s with parameters in the URL, and as a response you 
get an XML document.

Example request:

   http://localhost:8081/nutch/opensearch?query=cnn

Example response:

<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:nutch="http://www.nutch.org/opensearchrss/1.0/"; 
xmlns:opensearch="http://a9.com/-/spec/opensearchrss/1.0/"; version="2.0">
<channel>
<title>Nutch: cnn</title>
<description>Nutch search results for query: cnn</description>
<link>http://localhost:8081/nutch/search.jsp?query=cnn&amp;start=0&amp;hitsPerDup=2&amp;hitsPerPage=10</link> 

<opensearch:totalResults>1</opensearch:totalResults>
<opensearch:startIndex>0</opensearch:startIndex>
<opensearch:itemsPerPage>10</opensearch:itemsPerPage>

<nutch:query>cnn</nutch:query>
<item>
<title>CNN.com - Breaking News, U.S., World, Weather, Entertainment 
&amp; Video News</title>
<description>&lt;span class="ellipsis"&gt; ... &lt;/span&gt;the world 
Instant Access &lt;span class="highlight"&gt;CNN&lt;/span&gt; 
International Live newscasts and&lt;span class="ellipsis"&gt; ... 
&lt;/span&gt;Pipeline Overnight Live feeds from &lt;span 
class="highlight"&gt;CNN&lt;/span&gt; and its global&lt;span 
class="ellipsis"&gt; ... &lt;/span&gt;</description>

<link>http://www.cnn.com/</link>
<nutch:site>www.cnn.com</nutch:site>
<nutch:cache>http://localhost:8081/nutch/cached.jsp?idx=0&amp;id=0</nutch:cache> 

<nutch:explain>http://localhost:8081/nutch/explain.jsp?idx=0&amp;id=0&amp;query=cnn&amp;lang=null</nutch:explain> 

<nutch:segment>20060817135307</nutch:segment>
<nutch:digest>6e5e1ede359a88f11fc564cf22f79305</nutch:digest>
<nutch:boost>2.5735338</nutch:boost>

</item>
</channel>
</rss>



Thanks for reply,

I did not want to drop whole .war into my already running web ap. Just 
looking at dropping this nutch.searcher package in with the two 
dependent imports needed ie. hadoop.conf.Configuration; and 
nutch.util.NutchConfiguraion;  it will access the index under 
tomcatServerRoot/nutch-0.8/crawl-result/index...

so I see as you run the query and servlet outputs xml ... does it 
include a xslt stylesheet with it to format the page.

Unfortunately I don't have time to start experimenting and seeing my own 
results for the next few days, so I am just trying to garner info, to 
point me in the right direction. I appreciate all the replys.

Thanks