Category: | HTML Utility |
Author/Contact Info | Dan Kubb (dkubb) dkubb@cpan.org |
Description: | This utility will recurse through a specified directory, parse all the .htm and .html files, and replace any absolute URL's with relative URL's to a base you define. You can also specify what types of links to parse: img, src, action, or any others. Please see HTML::Tagset's %linkElements hash, in the module's source, for a precise breakdown of supported tag-types. This program was good practice for trying out Getopt::Declare, an excellent command-line parser. Please note the parameter specification below the __DATA__ tag. Disclaimer: Always use the -b switch to force backups, just in case you have non-standard HTML and the HTML::TreeBuilder parser mangles it. Comments and suggestions for improvement are always welcome and very much appreciated. |
#!/usr/bin/perl -w use strict; use Getopt::Declare; use Cwd; use File::Find; use HTML::TreeBuilder; use URI::URL qw(url); use File::Copy; use IO::File; use vars qw($VERSION $BASE_URL $BACKUP $DIRECTORY @WANTED_TYPES); $VERSION = (qw$Revision: 1.1 $)[1]; #Load the definition and grab the command-line parameters my $opts = Getopt::Declare->new( do{ local $/; <DATA> } ); #Cycle through this directory, and all those underneath it find(\&wanted, $DIRECTORY || getcwd); #Parse each HTML file and make a backup #of it using File::Copy::copy. sub wanted { return unless $File::Find::name =~ /html?$/; #Extract Links from the file my $h = HTML::TreeBuilder->new; $h->parse_file($File::Find::name); my $link_elements = $h->extract_links(@WANTED_TYPES); return unless @$link_elements; #Grab each img src and re-write them so they are relative URL's foreach my $link_element (@$link_elements) { my $link = shift @$link_element; #URL value my $element = shift @$link_element; #HTML::Element Object my $url = url($link)->canonical; next unless $url->can('host_port') and $BASE_URL->host_port eq $url->host_port; #Sigh.. The following is because extract_links() doesn't #tell you which attribute $link belongs to, except to say #it is the value of an attribute in $element.. somewhere. #Given the $link, find out which attribute it was for my ($attr) = grep { defined $element->attr($_) and $link eq $element->attr($_) } @{ $HTML::Tagset::linkElements{$element->tag} }; #Re-write the attribute in the HTML::Element Tree #Note: $BASE_URL needs to be quoted here. $element->attr($attr, $url->path("$BASE_URL")); } #Make a backup of the file before over-writing it copy $File::Find::name => $File::Find::name.'.bak' if defined $BACKUP; #Save the updated file my $fh = IO::File->new($File::Find::name, O_RDWR) or die "Could not open $File::Find::name: $!"; $fh->print($h->as_HTML); } __DATA__ #If there is an error here, you need to have one tab #between the <$var> and the option description. -u <base_url> Base URL (http://www.yoursite.com) [required] { $BASE_URL = url($base_url)->canonical } -b Backup changed files { $BACKUP = 1 } -d <directory> Starting Directory to recurse from { $DIRECTORY = $directory } -l <links>... Links to process: img, href, etc [required] { @WANTED_TYPES = @links } |
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