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<HTML>
<HEAD>
<TITLE>WWW::Search::NorthernLight - class for searching NorthernLight</TITLE>
<LINK REL="stylesheet" HREF="../../../../Active.css" TYPE="text/css">
<LINK REV="made" HREF="mailto:">
</HEAD>
<BODY>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> WWW::Search::NorthernLight - class for searching NorthernLight</P></STRONG>
</TD></TR>
</TABLE>
<A NAME="__index__"></A>
<!-- INDEX BEGIN -->
<UL>
<LI><A HREF="#name">NAME</A></LI><LI><A HREF="#supportedplatforms">SUPPORTED PLATFORMS</A></LI>
<LI><A HREF="#synopsis">SYNOPSIS</A></LI>
<LI><A HREF="#description">DESCRIPTION</A></LI>
<LI><A HREF="#see also">SEE ALSO</A></LI>
<LI><A HREF="#how does it work">HOW DOES IT WORK?</A></LI>
<LI><A HREF="#testing">TESTING</A></LI>
<LI><A HREF="#author">AUTHOR</A></LI>
<LI><A HREF="#legalese">LEGALESE</A></LI>
<LI><A HREF="#version history">VERSION HISTORY</A></LI>
</UL>
<!-- INDEX END -->
<HR>
<P>
<H1><A NAME="name">NAME</A></H1>
<P>WWW::Search::NorthernLight - class for searching NorthernLight</P>
<P>
<HR>
<H1><A NAME="supportedplatforms">SUPPORTED PLATFORMS</A></H1>
<UL>
<LI>Linux</LI>
<LI>Solaris</LI>
<LI>Windows</LI>
</UL>
<HR>
<H1><A NAME="synopsis">SYNOPSIS</A></H1>
<PRE>
use WWW::Search;
my $oSearch = new WWW::Search('NorthernLight');
my $sQuery = WWW::Search::escape_query("+sushi restaurant +Columbus Ohio");
$oSearch->native_query($sQuery);
while (my $oResult = $oSearch->next_result()) {
print $oResult->url, "\n";
}</PRE>
<P>
<HR>
<H1><A NAME="description">DESCRIPTION</A></H1>
<P>This class is a NorthernLight specialization of WWW::Search.
It handles making and interpreting NorthernLight searches
<EM><A HREF="http://www.northernlight.com">http://www.northernlight.com</A></EM>.</P>
<P>Northern Light supports full Boolean capability (AND,
OR, NOT), including parenthetical ``expressions'', in
all searches. There is no limit to the level of nesting
which you can use in a query.</P>
<P>This class exports no public interface; all interaction should
be done through <A HREF="../../../../site/lib/WWW/Search.html">the WWW::Search manpage</A> objects.</P>
<P>
<HR>
<H1><A NAME="see also">SEE ALSO</A></H1>
<P>To make new back-ends, see <A HREF="../../../../site/lib/WWW/Search.html">the WWW::Search manpage</A>.</P>
<P>
<HR>
<H1><A NAME="how does it work">HOW DOES IT WORK?</A></H1>
<P><CODE>native_setup_search</CODE> is called (from <CODE>WWW::Search::setup_search</CODE>)
before we do anything. It initializes our private variables (which
all begin with underscore) and sets up a URL to the first results
page in <CODE>{_next_url}</CODE>.</P>
<P><CODE>native_retrieve_some</CODE> is called (from <CODE>WWW::Search::retrieve_some</CODE>)
whenever more hits are needed. It calls <CODE>WWW::Search::http_request</CODE>
to fetch the page specified by <CODE>{_next_url}</CODE>.
It then parses this page, appending any search hits it finds to
<CODE>{cache}</CODE>. If it finds a ``next'' button in the text,
it sets <CODE>{_next_url}</CODE> to point to the page for the next
set of results, otherwise it sets it to undef to indicate we''re done.</P>
<P>
<HR>
<H1><A NAME="testing">TESTING</A></H1>
<P>This module adheres to the <CODE>WWW::Search</CODE> test suite mechanism.
See $TEST_CASES below.</P>
<P>
<HR>
<H1><A NAME="author">AUTHOR</A></H1>
<P>This Backend is will now be maintained and supported by Jim Smyser.
Flames to: <<A HREF="mailto:jsmyser@bigfoot.com">jsmyser@bigfoot.com</A>></P>
<P><CODE>WWW::Search::NorthernLight</CODE> was originally written by Andreas Borchert
based on <CODE>WWW::Search::Excite</CODE>.</P>
<P>
<HR>
<H1><A NAME="legalese">LEGALESE</A></H1>
<P>THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.</P>
<P>
<HR>
<H1><A NAME="version history">VERSION HISTORY</A></H1>
<P>2.04
Mainly Tag stripping that was getting bad and causing undesirable
formatting in the title and description return.</P>
<P>2.03
Next Page url change and weeding out a new edit search url.</P>
<P>2.02
Minor parsing change to get the new description line that had changed.</P>
<P>2.01
typo and new test mechanism</P>
<P>1.06
Slight reformat change.</P>
<P>1.05
Fixed 'next' page tag recognition, this changed slightly.
Whitespace removal in description that was really BAD with
some hits. Ignoring internal NorthernLight URL's.</P>
<P>1.04
Slight adjustments to formatting. Returning score and date
with description.</P>
<P>1.03
Slight format change by NL that was making next page hits flakey
corrected. Misc. code clean up.</P>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> WWW::Search::NorthernLight - class for searching NorthernLight</P></STRONG>
</TD></TR>
</TABLE>
</BODY>
</HTML>