another crawler experiments with perl and db

[mirrors/Programs.git] / perl / crawler / crawl-b.pl

diff --git a/perl/crawler/crawl-b.pl b/perl/crawler/crawl-b.pl
new file mode 100755 (executable)
index 0000000..486bf6d
--- /dev/null
+++ b/perl/crawler/crawl-b.pl
@@ -0,0 +1,74 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+use threads;
+#use Thread::Queue;
+#use threads::shared;
+use LWP::Simple qw($ua get); $ua->timeout(3);
+use BerkeleyDB;
+
+print STDERR "This is libwww-perl-$LWP::VERSION\n";
+
+#my @queue :shared;
+#my %crawled :shared;
+tie my @queue, "BerkeleyDB::Recno", -Filename => 'queue.db', -Flags => DB_CREATE || die "Cannot open DB1!\n";
+tie my %crawled, "BerkeleyDB::Hash", -Filename => 'urls.db', -Flags => DB_CREATE || die "Cannot open DB2!\n";
+
+push(@queue, 'http://root.cz/');
+push(@queue, 'http://blog.harvie.cz/');
+
+untie @queue;
+untie %crawled;
+
+
+sub uniq(\@) {
+  my ($i) = @_;
+  my %h;
+  @$i = grep(!$h{$_}++, @$i);
+  return(@$i);
+}
+
+my $threads = 3;
+for(my $i=0; $i<$threads; $i++) {
+       my $thr = threads->create(sub {
+               print("[*] Worker #$i running!\n");
+
+           my $env = new BerkeleyDB::Env
+                         -Home   => "/tmp/" ,
+                         -Flags  => DB_CREATE| DB_INIT_CDB | DB_INIT_MPOOL
+               or die "cannot open environment: $BerkeleyDB::Error\n";
+
+
+               tie my @queue, "BerkeleyDB::Recno", -Filename => 'queue.db', -Flags => DB_CREATE, -Env => $env || die "Cannot open DB1!\n";
+               tie my %crawled, "BerkeleyDB::Hash", -Filename => 'urls.db', -Flags => DB_CREATE, -Env => $env || die "Cannot open DB2!\n";
+
+               while (1) {
+                       print "omg ".shift(@queue)."\n";
+                       if(length($_) < 3) { sleep(1); next; }
+
+                       print "#$i:\tGET $_\n";
+                       $_ = LWP::Simple::get($_);
+
+                       my @urls;
+                       if($_) {
+                               @urls = /(http:\/\/[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}\/{1}[-_~&=\ ?\.a-z0-9\/]*)/g; #urls
+                               #@urls = /(http:\/\/[^\/'" ]*)/g; #domains
+                               if($i && @queue < 1000) {
+                                       #print("#$i:\tENQ: @urls\n");
+                                       push(@queue, uniq(@urls));
+                                       #while(uniq(@urls)) { push(@queue, $_); }
+                               } 
+                       }
+               }
+
+               print("[*] Worker #$i stopped!\n");
+       }) -> detach();
+}
+
+while(1) {
+       print '###: '.@queue."\n";
+       uniq(@queue);
+       print '###: '.@queue."\n";
+
+       sleep(5);
+}