How to get XML response from CommonsHttpSolrServer through QueryResponse?

["M.S. Buiter" <M....@amc.uva.nl>]

Dear All, 

Until now we have used Solr from a servlet in which we built the
solr URL, and used response.sendRedirect(url) to send the query to
solr, and have it translate its XML results, through XSLT, to HTML.

We now want to do the XML/XSL translation process ourselves, 
and to accomplish that I no longer redirect my servlet to the solr
url, but use a CommonsHttpSolrServlet to which I pass the parameters
using ModifiableSolrParams:

CommonsHttpSolrServer server = new CommonsHttpSolrServer("http://localhost:8080/kannada/db");
server.setParser(new XMLResponseParser());

ModifiableSolrParams params = new ModifiableSolrParams();
params.set("q", searchTerms);
params.set("q.op", combination);

QueryResponse solrResponse = null;
try{
    solrResponse = server.query(params);
} catch(Exception e) {
    System.out.println("Exception occured in SOLR");
}

When I so a System.out(solrResponse), I get:

{responseHeader={status=0,QTime=141,params={q=library,q.op=AND,wt=xml,version=2.2}},response={numFound=180,start=0,docs=[SolrDocument[{timestamp=Wed Jan 07 16:36:51 CET 2009, sum (...)

Because I used server.setParser(new XMLResponseParser()), I get the wt=xml parameter
in the responseHeader, but the format of the responseHeader is clearly no XML at all. I expect
Solr does output XML, but that the QueryResponse, when I print its contents, formats this as the
string above.

Is there any way to directly obtain Solr's XML output? 

Kind regards, and many thanks in advance, 

Maarten Buiter

Re: How to get XML response from CommonsHttpSolrServer through QueryResponse?

[Chris Hostetter <ho...@fucit.org>]

: Because I used server.setParser(new XMLResponseParser()), I get the 
: wt=xml parameter in the responseHeader, but the format of the 
: responseHeader is clearly no XML at all. I expect Solr does output XML, 
: but that the QueryResponse, when I print its contents, formats this as 
: the string above.

what you are seeing is the results of the toString message on the 
QueryResponse object generated by the parser -- the XML is gone at this 
point, the XMLResponseParser processed it to generate that object.

that's really the main value add of using the SolrServer/ResponseParser 
APIs ... if you want the raw XML response there's almost no value in using 
those classes at all -- just use the HttpClient directly.




-Hoss