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# Part of get-flash-videos. See get_flash_videos for copyright. |
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package FlashVideo::URLFinder; |
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use strict; |
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use FlashVideo::Mechanize; |
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use FlashVideo::Generic; |
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use FlashVideo::Site; |
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use FlashVideo::Utils; |
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use URI; |
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# The main issue is getting a URL for the actual video, so we handle this |
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# here - a different package for each site, as well as a generic fallback. |
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# Each package has a find_video method, which should return a URL, and a |
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# suggested filename. |
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# In some cases there isn't an obvious URL to find, so the following will be loaded and their 'can_handle' |
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# method called. |
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my @extra_can_handle = qw(Brightcove Mtvnservices Gawker); |
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sub find_package { |
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my($class, $url, $browser) = @_; |
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my $package = _find_package_url($url, $browser); |
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if(!defined $package) { |
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# Fairly lame heuristic, look for the first URL outside the |
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# element (avoids grabbing things like codebase attribute). |
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# Also look at embedded scripts for sites which embed their content that way. |
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# TODO: extract all SWF URLs from the page and check to see if we've |
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# got a package for those. |
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for my $possible_url($browser->content =~ |
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m!(?: |
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$package = _find_package_url($possible_url, $browser); |
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return _found($package, $possible_url) if defined $package; |
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} |
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} |
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if(!defined $package) { |
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for(@extra_can_handle) { |
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my $possible_package = _load($_); |
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my $r = $possible_package->can_handle($browser, $url); |
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if($r) { |
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$package = $possible_package; |
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last; |
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} |
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} |
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} |
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if(!defined $package) { |
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$package = "FlashVideo::Generic"; |
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} |
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return _found($package, $url); |
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} |
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# Split the URLs into parts and see if we have a package with this name. |
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sub _find_package_url { |
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my($url, $browser) = @_; |
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my $package; |
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foreach my $host_part (split /\./, URI->new($url)->host) { |
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$host_part = lc $host_part; |
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$host_part =~ s/[^a-z0-9]//i; |
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my $possible_package = _load($host_part); |
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if($possible_package->can("find_video")) { |
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if($possible_package->can("can_handle")) { |
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next unless $possible_package->can_handle($browser, $url); |
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} |
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$package = $possible_package; |
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last; |
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} |
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} |
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return $package; |
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} |
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sub _found { |
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my($package, $url) = @_; |
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info "Using method '" . lc((split /::/, $package)[-1]) . "' for $url"; |
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return $package, $url; |
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} |
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sub _load { |
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my($site) = @_; |
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my $package = "FlashVideo::Site::" . ucfirst lc $site; |
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if(eval "require $package") { |
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no strict 'refs'; |
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push @{$package . "::ISA"}, "FlashVideo::Site"; |
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} |
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return $package; |
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} |
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1; |