This is a script to build a quick vocabulary of the most frequent words in a language, based on spidering and scraping a list of urls. It shows context and links to a google translate page.
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#!/usr/bin/perl | |
$|=1; | |
use strict; | |
use warnings; | |
use LWP::UserAgent; | |
use URI::URL; | |
use HTML::Strip; | |
use HTML::LinkExtor; | |
use Data::Dumper; | |
use List::Util qw( shuffle ); | |
use Text::Sentence qw(split_sentences); | |
# | |
# Some global vars | |
# | |
my $MAXURLS = 100; | |
my $PAGEITEMS = 250; | |
my @nexturls = qw( | |
http://nl.yahoo.com/?p=us | |
http://nl.wikipedia.org/wiki/Hoofdpagina | |
http://nl.wikipedia.org/wiki/Amsterdam | |
); | |
#-------------------------------------------------------------------------------- | |
# | |
# Main program | |
# | |
#-------------------------------------------------------------------------------- | |
# | |
# Main program fetching loop | |
# | |
# | |
my %frequencies; | |
my %seen_urls; | |
my %sentences; | |
my $urlcounter = 1; | |
while ( my $url = shift @nexturls ) { | |
warn "[DOC $urlcounter/$MAXURLS] $url\n"; | |
my $doc = LWP::UserAgent->new->get( $url ); | |
sentence_ref ( $doc, \%sentences ); | |
word_frequency( $doc, \%frequencies ); | |
get_urls ( $doc, \@nexturls ); | |
last unless $urlcounter++ < $MAXURLS; | |
} | |
# | |
# | |
# Spew out results! | |
# | |
# | |
my $lines = 1; | |
print <<EOH; | |
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" | |
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> | |
<html xmlns="http://www.w3.org/1999/xhtml"> | |
<head> | |
<link rel="stylesheet" href="dwords.css" type="text/css"/> | |
</head> | |
<body> | |
<P> | |
DIY vocabulary builder. This document contains the $MAXURLS highest frequent used words in dutch | |
from a selection of dutch websites. You probably came here from | |
<a href="http://www.einarsen.no/">my weblog</a> or my twitter: | |
<a href="http://www.twitter.com/matseinarsen/">@matseinarsen</a>. | |
</P> | |
<DL> | |
EOH | |
print "<DL>\n"; | |
for my $key ( sort { $frequencies{ $b } <=> $frequencies{ $a } } keys %frequencies ) { | |
my $uckey = uc $key; | |
my $ucfkey = ucfirst $key; | |
print <<EOH; | |
<div class="box" id="$lines"> | |
<DT><a class="title" target="translation" href="http://translate.google.com/#nl|en|$key\">$uckey - $ucfkey - $key </a> | |
<br/> | |
$frequencies{ $key } mentions in $MAXURLS documents - $lines most frequent word - <a href="javascript:document.getElementById('$lines').style.opacity = 0.1; ">hide</a> - <a href="javascript:document.getElementById('$lines').style.opacity = 1; ">show</a></DT> | |
EOH | |
my %seen; | |
print map { my $h = $_; | |
$h =~ s/\b($key)\b/<b>$1<\/b>/gi; | |
"<DD><a target=\"translation\" href=\"http://translate.google.com/#nl|en|$_\">$h</a></DD>" } | |
grep { defined $_ } | |
(sort {length $a <=> length $b } | |
grep {! $seen{ $_ }++ } | |
@{ $sentences{$key} } | |
)[0..5] | |
; | |
print "</div>\n"; | |
last if $lines++ > $PAGEITEMS; | |
} | |
print "</DL>\n"; | |
#-------------------------------------------------------------------------------- | |
# | |
# Subs | |
# | |
#-------------------------------------------------------------------------------- | |
# | |
# Get sentence context | |
# | |
sub sentence_ref { | |
my $text = HTML::Strip->new->parse( shift->decoded_content ); | |
my $sentences = shift; | |
$text =~ s/(\n|\[\d+\])//g; | |
my @sentences = grep {!( /[\.\!\?](.*)[\.\?\!]/ or /\s\s/ or /[a-z][A-Z]/) } split_sentences( $text ); | |
SENTENCE: | |
for my $sentence ( @sentences ) { | |
$sentence =~ s/\s+(\.\,\?\!)/$1/g; | |
(($sentence =~ tr/ //) > 20 or ($sentence =~ tr/ //) < 4) and next SENTENCE; | |
WORD: for my $word ( split / /, lc $sentence ) { | |
$word =~ s/[^\w]//g; | |
length $word or next WORD; | |
push @{ $sentences{$word} }, $sentence; | |
} | |
} | |
} | |
# | |
# Get the frequency of words in a LWP result object | |
# | |
sub word_frequency { | |
my $text = HTML::Strip->new->parse( shift->decoded_content ); | |
my $frequencies = shift; | |
$text =~ s/[\s\.\,\)\(\?]+/ /g; | |
$frequencies->{ $_ } ++ for grep { /^[\w]+$/ and !/[0-9]/ } | |
split / /, lc $text; | |
} | |
# | |
# Push the urls in a LWP object into a list | |
# | |
sub get_urls { | |
my $document = shift; | |
my $links = shift; | |
push @$links, shuffle | |
grep { /(nl\.|\.nl|Nederlands)/i and | |
!/(mediawiki|wikimedia|creativecom)/ and | |
!/\#/ and | |
!/(rss|css|js|gif|jpg|png)$/i and | |
!exists $seen_urls{ $_ } } | |
map { url($_->[2], $document->base)->abs } | |
HTML::LinkExtor->new->parse( $document->content )->links; | |
@$links = @$links; | |
@seen_urls{ @$links } = (); | |
} | |
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