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use base qw(Class::Accessor); |
use base qw(Class::Accessor); |
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Grep::Source->mk_accessors( qw(feed uri q new_items collection) ); |
Grep::Source->mk_accessors( qw(feed uri q new_items collection) ); |
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use HTML::TreeBuilder; |
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use WWW::Mechanize; |
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use XML::Feed; |
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use URI; |
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use HTML::ResolveLink; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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=head1 NAME |
=head1 NAME |
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my $class = $self->feed->source || 'Grep::Source::Feed'; |
my $class = $self->feed->source || 'Grep::Source::Feed'; |
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Jifty->log->debug("using $class"); |
Jifty->log->debug("using $class"); |
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$class->fetch( $self ); |
my $parent = $self; |
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$class->fetch( $parent ); |
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undef $parent; |
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Grep::Search->finish if $self->new_items; |
Grep::Search->finish if $self->new_items; |
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my $i = Grep::Model::Item->new(); |
my $i = Grep::Model::Item->new(); |
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my ($ok,$msg) = $i->load_or_create( @_ ); |
my $rec = {@_}; |
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warn "resolving links"; |
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my $resolver = HTML::ResolveLink->new( base => $rec->{link} ); |
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$rec->{content} = $resolver->resolve( $rec->{content} ); |
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my ($ok,$msg) = $i->load_or_create( %$rec ); |
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$msg ||= ''; |
$msg ||= ''; |
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foreach my $s ( $self->sources ) { |
foreach my $s ( $self->sources ) { |
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Jifty->log->debug("testing source class $s"); |
Jifty->log->debug("testing source class $s"); |
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if ($s->can('content_have') && $s->content_have( $content ) ) { |
if ( $s->can('content_have') ) { |
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Jifty->log->debug("${s}->content_have succesful"); |
my $regex = $s->content_have( $content ) or |
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return "$s"; |
die "${s}->content_have didn't return anything"; |
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die "${s}->content_have didn't return regex but ", dump( $regex ), " ref ", ref( $regex ) |
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unless ( ref($regex) eq 'Regexp' ); |
180 |
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if ( $content =~ $regex ) { |
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Jifty->log->debug("${s}->content_have succesful"); |
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return $s; |
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} |
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} |
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} |
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} |
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=head2 scrape |
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Create semi-complex L<WWW::Mechanize> rules to scrape page |
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=cut |
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195 |
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sub scrape { |
196 |
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my $self = shift; |
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198 |
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my $args = {@_}; |
199 |
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200 |
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warn "scrape got args ",dump($args); |
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202 |
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my ($feed,$uri,$q) = ($self->feed, $self->uri,$self->q); |
203 |
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die "no uri" unless ($uri); |
204 |
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die "feed is not a Grep::Model::Feed but ", ref $feed unless $feed->isa('Grep::Model::Feed'); |
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206 |
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sub mech_warn { |
207 |
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my $m = shift || return; |
208 |
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warn $m; |
209 |
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} |
210 |
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211 |
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my $mech = WWW::Mechanize->new( |
212 |
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cookie_jar => {}, |
213 |
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onwarn => \&mech_warn, |
214 |
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onerror => \&mech_warn, |
215 |
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); |
216 |
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217 |
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$mech->get( $uri ); |
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219 |
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$self->save( 'get.html', $mech->content ); |
220 |
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221 |
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if ( my $form = $args->{submit_form} ) { |
222 |
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warn "submit form on $uri with ", dump( $form ),"\n"; |
223 |
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$mech->submit_form( %$form ) or die "can't submit form ", dump( $form ); |
224 |
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$self->save( 'submit.html', $mech->content ); |
225 |
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} |
226 |
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227 |
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warn "parse result page\n"; |
228 |
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229 |
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my $tree = HTML::TreeBuilder->new or die "can't create html tree"; |
230 |
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$tree->parse( $mech->content ) or die "can't parse fetched content"; |
231 |
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232 |
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die "wrapper doesn't have 3 elements but ", $#{ $args->{wrapper} } unless ( $#{ $args->{wrapper} } == 2 ); |
233 |
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my ( $el,$attr,$value ) = @{ $args->{wrapper} }; |
234 |
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235 |
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warn "looking for <$el $attr=\"$value\">"; |
236 |
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237 |
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my $div = $tree->look_down( '_tag', $el, sub { |
238 |
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warn dump( $_[0]->attr( $attr ) ),$/; |
239 |
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( $_[0]->attr( $attr ) || '' ) eq $value; |
240 |
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}); |
241 |
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242 |
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if ( ! $div ) { |
243 |
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warn "can't find results wrapper <$el $attr=\"$value\">"; |
244 |
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return; |
245 |
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} |
246 |
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247 |
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my $max = 5; |
248 |
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my $nr = 1; |
249 |
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250 |
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my $base_uri = $uri; |
251 |
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$base_uri =~ s!\?.*$!!; |
252 |
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253 |
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foreach my $dt ( $div->look_down( '_tag', $args->{results} ) ) { |
254 |
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my $a = $dt->look_down( '_tag', 'a', sub { $_[0]->attr('href') } ); |
255 |
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if ( $a ) { |
256 |
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257 |
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my $href = $a->attr('href') or die "can't find href inside <", $args->{results}, ">"; |
258 |
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my $page_uri = URI->new_abs( $a->attr('href'), $base_uri ); |
259 |
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$page_uri->query( undef ); |
260 |
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$page_uri = $page_uri->canonical; |
261 |
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262 |
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warn "fetching page: ",$a->as_text," from $page_uri\n"; |
263 |
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if ( $mech->follow_link( url => $a->attr('href') ) ) { |
264 |
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265 |
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$self->save( "page-${nr}.html", $mech->content ); |
266 |
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267 |
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my $page_tree = HTML::TreeBuilder->new or die "can't create page tree"; |
268 |
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$page_tree->parse( $mech->content ) or die "can't parse page at $page_uri"; |
269 |
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270 |
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( $el,$attr,$value ) = @{ $args->{scrape} }; |
271 |
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$div = $page_tree->look_down( '_tag', $el, sub { ( $_[0]->attr( $attr ) || '' ) eq $value } ); |
272 |
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273 |
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die "can't find <$el $attr=\"$value\">" unless ($div); |
274 |
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275 |
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$self->add_record( |
276 |
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in_feed => $feed, |
277 |
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title => $mech->title, |
278 |
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link => $page_uri, |
279 |
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content => $div->as_HTML, |
280 |
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# summary => |
281 |
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# category => |
282 |
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# author => |
283 |
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# issued => |
284 |
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# modified => |
285 |
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); |
286 |
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287 |
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$mech->back; |
288 |
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$page_tree->delete; |
289 |
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290 |
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} else { |
291 |
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warn "can't follow uri $page_uri: $!\n"; |
292 |
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} |
293 |
} |
} |
294 |
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295 |
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last if ($nr == $max); |
296 |
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$nr++; |
297 |
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} |
298 |
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299 |
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$tree->delete; # clear memory! |
300 |
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301 |
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} |
302 |
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303 |
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=head2 save |
304 |
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305 |
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save( 'name', $content ); |
306 |
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307 |
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Save dumps into C</tmp/grep> if writable |
308 |
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309 |
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=cut |
310 |
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311 |
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sub save { |
312 |
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my $self = shift; |
313 |
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my ( $file, $content ) = @_; |
314 |
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if ( -w '/tmp/grep' ) { |
315 |
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open(my $f, '>', "/tmp/grep/$file") or die "can't open $file: $!"; |
316 |
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print $f $content or die "can't write to $file: $!"; |
317 |
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close $f or die "can't close $file: $!"; |
318 |
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Jifty->log->debug("saved $file ",length($content)," bytes"); |
319 |
} |
} |
320 |
} |
} |
321 |
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