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#!/usr/local/bin/perl -w |
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use strict; |
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|
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use LWP::UserAgent; |
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use HTTP::Status; |
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use HTML::LinkExtor; |
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|
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if (scalar(@ARGV) != 2) { |
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print STDERR "Usage: SwishSpider localpath url\n"; |
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exit(1); |
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} |
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|
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my $ua = new LWP::UserAgent; |
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$ua->agent( "SwishSpider http://swish-e.org" ); |
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|
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my $localpath = shift; |
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my $url = shift; |
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|
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my $no_parent_url; |
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if ($url =~ m/\s/) { |
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($no_parent_url,$url) = split(/\s/,$url,2); |
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# old scheme had URL, no parent and new is reverse |
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($url,$no_parent_url) = ($no_parent_url,$url) if ($no_parent_url =~ m/\Q$url\E/); |
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} |
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|
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my $request = new HTTP::Request( "GET", $url ); |
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my $response = $ua->simple_request( $request ); |
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|
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# |
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# Write out important meta-data. This includes the HTTP code. Depending on the |
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# code, we write out other data. Redirects have the location printed, everything |
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# else gets the content-type. |
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# |
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open( RESP, ">$localpath.response" ) || die( "Could not open response file $localpath.response" ); |
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|
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print RESP $response->code() . "\n"; |
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if( $response->code() == RC_OK ) { |
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print RESP $response->header( "content-type" ) . "\n"; |
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} elsif( $response->is_redirect() ) { |
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my $link = $response->header( "location" ); |
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if ($no_parent_url) { |
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if ($link =~ m/$no_parent_url/) { |
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# if this URL is below parent URL o.k.... |
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print RESP "$no_parent_url $link\n"; |
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} else { |
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# if not, crawl just this page! |
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print RESP "$link $link\n"; |
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} |
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} else { |
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print RESP "$link\n"; |
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} |
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} |
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close( RESP ); |
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|
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# |
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# Write out the actual data assuming the retrieval was succesful. Also, if |
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# we have actual data and it's of type text/html, write out all the links it |
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# refers to |
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# |
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if( $response->code() == RC_OK ) { |
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my $contents = $response->content(); |
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|
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open( CONTENTS, ">$localpath.contents" ) || die( "Could not open contents file $localpath.contents\n" ); |
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# fixup just HTML files |
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if ($response->header("content-type") =~ "text/html") { |
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# if you don't want content to be indexed, include it in |
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# <noindex> foobar </noindex> tags or surround it with comments |
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# <!-- noindex --> foobar <!-- /noindex --> |
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# <!-- noindex --> foobar <!-- index --> (also supported by swish) |
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$contents =~ s,<noindex>.+?</noindex>,,isg; |
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$contents =~ s,<!--\s*noindex\s*-->.+?<!--\s*/noindex\s*-->,,isg; |
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$contents =~ s,<!--\s*noindex\s*-->.+?<!--\s*index\s*-->,,isg; |
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# this will remove all script from indexing content |
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$contents =~ s,<script>.+?</script>,,isg; |
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# remap Windows charset to ISO-8859-2 |
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$contents =~ tr/ðèæÐÈÆ/¹ð¾èæ©Ð®ÈÆ/; # 1250 -> iso8859-2 |
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# this will fix badly formatted html in form: |
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# <head><title>some text</title |
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# ></head> |
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# which will confuse indexer (or libxml2?) |
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$contents =~ s/[\n\r]^(>)/$1\n/msg; |
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# remove comments between <html> and <head> texi2html inserts them |
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# there and swish can't find document title then (libxml or swish bug?) |
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while ($contents =~ s/(<html>.*)<!--.*?-->(.*<head>)/$1$2/msi) { }; |
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} |
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print CONTENTS $contents; |
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close( CONTENTS ); |
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|
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if( $response->header("content-type") =~ "text/html" ) { |
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open( LINKS, ">$localpath.links" ) || die( "Could not open links file $localpath.links\n" ); |
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my $p = HTML::LinkExtor->new( \&linkcb, $url ); |
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$p->parse( $contents ); |
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|
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close( LINKS ); |
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} |
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} |
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|
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|
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sub linkcb { |
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my($tag, %links) = @_; |
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if (($tag eq "a" || $tag eq "area") && ($links{"href"}) || ($tag eq "frame" && $links{"src"})) { |
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my $link = $links{"href"} || $links{"src"}; |
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|
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# |
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# Remove fragments |
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# |
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$link =~ s/(.*)#.*/$1/; |
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|
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# |
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# Remove ../ This is important because the abs() function |
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# can leave these in and cause never ending loops. |
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# |
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$link =~ s/\.\.\///g; |
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|
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# hack for apostrophe -- changes URL, but should work for most clients. |
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$link =~ s/'/%27/g; |
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|
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# hack for Apache directory listings |
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$link =~ s,/\?[NMSD]=[AD]$,/,g; |
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|
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# speedup, skip pictures |
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return if ($link =~ m/\.(gif|jpg|png)/); |
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|
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if ($no_parent_url) { |
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if ($link =~ m/$no_parent_url/) { |
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print LINKS "$no_parent_url $link\n"; |
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# print STDERR "using $link\n"; |
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# } else { |
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# print STDERR "skipping $link\n"; |
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} |
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} else { |
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print LINKS "$link\n"; |
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} |
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} |
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} |
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