htmanning has asked for the wisdom of the Perl Monks concerning the following question:

I'm trying to resize the youtube iframe code so that it works in a mobile browser. For example: 
<iframe width="560" height="349" src="http://www.youtube.com/embed/8lG
+m40pxw" frameborder="0" allowfullscreen></iframe>

[download]
I need to set the width to 300 and adjust the height accordingly. Sometimes the width is 560, other times it might be 480, or 600. I was using the following but it no longer applies because Google changed their code around: 
$video =~ s!
   (<iframe
   [ ]title="YouTube[ ]video[ ]player"
   [ ]width=")([0-9]+)("
   [ ]height=")([0-9]+)("
   )
!
   $1 . "300" . $3 . ((300/$2)*$4) . $5
!xeg;

[download]
The above no longer works. I'm guessing because there is no longer a Title tag in the YouTube URL. Any help would be appreciated. I also need a way to take the iframe code and grab only the URL contained within it. I'm not sure how to accomplish that. Thanks.

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Re: Resize video for mobile browser
by kcott (Archbishop) on Aug 15, 2011 at 06:44 UTC

    I note you are matching against attribute="value" throughout and matching a single space between attribute/value pairs. The source HTML could easily contain additional whitespace such as attribute = "value".

    If you're going to do the matching yourself (rather than using one of the tools like those shown above), you need to take this into consideration.

    -- Ken

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Re: Resize video for mobile browser
by Anonymous Monk on Aug 15, 2011 at 02:30 UTC

    Any help would be appreciated.

    The sooner you switch to pQuery, HTML::TreeBuilder::LibXML/HTML::TreeBuilder::XPath ... the better off you'll be 

    #!/usr/bin/perl --
use strict;
use warnings;

my $fafafa = <<'__FAFAFA__';
<iframe width="560" height="349" src="http://www.youtube.com/embed/8lG
+m40pxw" frameborder="0" allowfullscreen></iframe>
__FAFAFA__

print $fafafa;

$fafafa =~ s~<iframe([^>]+)>~'<iframe '.Fafafa("$1");~gie;

print $fafafa;
    
sub Fafafa {
    my %kava;
    my @bool;
    while( $_[0] =~ m{
        \G
        (?:
            ( [^'"\s=]+ )        # $1, key
            \s* = \s*
            " ( [^"]+)" # $2, val
        )
        |
        ( [^'"\s=]+ )           # single
        |
        \s
    }gxs
    ){
        no warnings 'uninitialized';
        print "1($1)2($2)3($3)\n";
        if( $3 ){
            push @bool, $3
        } elsif( $1 ) {
            $kava{$1}=$2;
        }
        
    }
    
    use DDS; Dump(\%kava);
    return join ' ', @bool, map { qq'$_="$kava{$_}"' } keys %kava;
}

__END__

    [download]
    <iframe width="560" height="349" src="http://www.youtube.com/embed/8lG
+m40pxw" frameborder="0" allowfullscreen></iframe>
1()2()3()
1(width)2(560)3()
1()2()3()
1(height)2(349)3()
1()2()3()
1(src)2(http://www.youtube.com/embed/8lGm40pxw)3()
1()2()3()
1(frameborder)2(0)3()
1()2()3()
1()2()3(allowfullscreen)
$HASH1 = {
           frameborder
                  => 0,
           height => 349,
           src    => 'http://www.youtube.com/embed/8lGm40pxw',
           width  => 560
         };
<iframe allowfullscreen width="560" frameborder="0" src="http://www.yo
+utube.com/embed/8lGm40pxw" height="349"</iframe>

    [download]
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Re: Resize video for mobile browser
by Mr. Muskrat (Canon) on Aug 15, 2011 at 17:29 UTC
[reply]

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