extract_url.pl 1.4 (Default branch)


 
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Old 10-14-2008
extract_url.pl 1.4 (Default branch)

extract_url.pl is a Perl script that extracts URLs from either correctly-encoded MIME email messages or from plain text. It can be used either as a pre-parser for a URL selector (such as urlview), or as a standalone URL selector. It is very configurable, can handle URLs that have been broken over several lines in format=flowed delsp=yes email messages, and eliminates duplicate URLs. It was designed primarily for use with Mutt, but can be used by for any similar purpose. The idea is that if you want to access a URL in an email, you pipe the email to a URL extractor (like this one), which then lets you select a URL to view in some third program (such as Firefox). License: BSD License (original) Changes:
This release adds support for a configurable alternative selection key (via ALTSELECT), allowing a person to, in effect, temporarily negate the PERSISTENT setting. It adds conditional support for long options if Getopt::Long is available. Image

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HTML::LinkExtor(3pm)					User Contributed Perl Documentation				      HTML::LinkExtor(3pm)

NAME
HTML::LinkExtor - Extract links from an HTML document SYNOPSIS
require HTML::LinkExtor; $p = HTML::LinkExtor->new(&cb, "http://www.perl.org/"); sub cb { my($tag, %links) = @_; print "$tag @{[%links]} "; } $p->parse_file("index.html"); DESCRIPTION
HTML::LinkExtor is an HTML parser that extracts links from an HTML document. The HTML::LinkExtor is a subclass of HTML::Parser. This means that the document should be given to the parser by calling the $p->parse() or $p->parse_file() methods. $p = HTML::LinkExtor->new $p = HTML::LinkExtor->new( $callback ) $p = HTML::LinkExtor->new( $callback, $base ) The constructor takes two optional arguments. The first is a reference to a callback routine. It will be called as links are found. If a callback is not provided, then links are just accumulated internally and can be retrieved by calling the $p->links() method. The $base argument is an optional base URL used to absolutize all URLs found. You need to have the URI module installed if you provide $base. The callback is called with the lowercase tag name as first argument, and then all link attributes as separate key/value pairs. All non-link attributes are removed. $p->links Returns a list of all links found in the document. The returned values will be anonymous arrays with the following elements: [$tag, $attr => $url1, $attr2 => $url2,...] The $p->links method will also truncate the internal link list. This means that if the method is called twice without any parsing between them the second call will return an empty list. Also note that $p->links will always be empty if a callback routine was provided when the HTML::LinkExtor was created. EXAMPLE
This is an example showing how you can extract links from a document received using LWP: use LWP::UserAgent; use HTML::LinkExtor; use URI::URL; $url = "http://www.perl.org/"; # for instance $ua = LWP::UserAgent->new; # Set up a callback that collect image links my @imgs = (); sub callback { my($tag, %attr) = @_; return if $tag ne 'img'; # we only look closer at <img ...> push(@imgs, values %attr); } # Make the parser. Unfortunately, we don't know the base yet # (it might be different from $url) $p = HTML::LinkExtor->new(&callback); # Request document and parse it as it arrives $res = $ua->request(HTTP::Request->new(GET => $url), sub {$p->parse($_[0])}); # Expand all image URLs to absolute ones my $base = $res->base; @imgs = map { $_ = url($_, $base)->abs; } @imgs; # Print them out print join(" ", @imgs), " "; SEE ALSO
HTML::Parser, HTML::Tagset, LWP, URI::URL COPYRIGHT
Copyright 1996-2001 Gisle Aas. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2011-10-15 HTML::LinkExtor(3pm)