#!/usr/local/bin/perl
# Version 1.3, 7/29/2002
# googlebounce.cgi
# Bounce around from a user-specified query to a random set 
# of results.
# googlebounce.cgi is called as a CGI with form input

use vars qw/$google_key $google_wsdl $max_bounces $current_bounce/;

# Your Google API developer's key
$google_key='insert key here';

# Location of the GoogleSearch WSDL file
$google_wdsl = "./GoogleSearch.wsdl";

use SOAP::Lite;

use LWP::Simple qw/get/;
use CGI qw/:standard/;

print
  header(  ),
  start_html("GoogleBounce"),
  h1("GoogleBounce"),
  start_form(-method=>'GET'),
  'Query: ', textfield(-name=>'query'),
  '   ',
  submit(-name=>'submit', -value=>'Search'),
  end_form(  ), p(  );

print "
"x4;

if (param('query')) {
  $|++; # turn off buffering

  print h3("Progress Report...");

  # Choose a random number of bounces
  $max_bounces = int(rand(5))+2; 

  # Set the counter to bounce number 1
  $current_bounce = 1;
  bounce(param('query'));
}

sub bounce {
  my($query) = @_;
  my $new_query;

  # Filter query for stopwords
  my $stopwords_regex = join '|', qw/the and -- - 1 www com of is a/;

  #$query =~ s/$stopwords_regex//gi;

  # Choose a random number of results
  my $max_results = int(rand(9))+2;

  my $google_search  = SOAP::Lite->service("file:$google_wdsl");

  my $results = $google_search -> 
    doGoogleSearch(
      $google_key, $query, 0, $max_results, 
      "false", "",  "false", "", "latin1", "latin1"
    );

  # Progress Report
  print 
    join br(  )."
",
      "<p>Bounce $current_bounce of $max_bounces",
      "Searching for:$query",
      "Asking for $max_results results",
      "Got " . scalar @{$results->{resultElements}}  . " results</p>";
  
  my $new_query;
  for (my $ii = $#{$results->{resultElements}}; $ii >= 0; $ii--) {
    $new_query = $results->{resultElements}->[$ii]->{title};
    $new_query  =~ s!<.+?>!!g; # drop all HTML tags
    $new_query =~ /w/ and last;
  }

  # If there's a new query and  we're not overbounced, bounce again
  ++$current_bounce <= $max_bounces and 
    $new_query =~ /w/ and
      $new_result = bounce($new_query) and
        return $new_result;

  # Otherwise, print out the top 10 for the final query
  print h3("Final Results...");

  my $google_search = SOAP::Lite->service("file:$google_wdsl");

  my $results = $google_search -> 
    doGoogleSearch(
      $google_key, $query, 0, 10,
      "false", "",  "false", "", "latin1", "latin1"
    );
 
  @{$results->{'resultElements'}} or print "None";

  foreach (@{$results->{'resultElements'}}) {
    print p(
      b($_->{title}||'no title'), br(  ),
      a({href=>$_->{URL}}, $_->{URL}), br(  ),
      i($_->{snippet}||'no snippet')
    );
  }

  print end_html(  );
  exit;
}

Figure 7-4 shows the results.

Figure 7-4. Google Bounce results for perl