Audio World September 4 2004

<< SEP 2004 >>

M a s t e r M e r r y - G o - R o u n d

$_[0]

QQ } # sub GetTop sub LockFile { my $tm = time; my $f = "${DataDirectory}/$DBname\.lock"; while((time - $tm) < 12) { last unless -e $f; sleep 2; } open LOCKFILE,">$f"; close LOCKFILE; } # sub LockFile sub UnLockFile { unlink "${DataDirectory}/$DBname\.lock"; return 0; } # sub UnLockFile sub Display { my ($line,$next,$howmany) = (); if(open R,"<${DataDirectory}/$TrackFile$DBextension") { my $line = ; close R; ($next,$howmany) = split /\t/,$line; } LockFile; open R,"<${DataDirectory}/$DBname$DBextension"; my @originalslurp = ; close R; chomp @originalslurp; UnLockFile; unless($howmany > 0) { $howmany = $#originalslurp; $next = 0; } return unless $howmany > 0; $next++; $next = 1 unless $next > 1 and $next <= $howmany; open W,">${DataDirectory}/$TrackFile$DBextension"; print W "$next\t$howmany"; close W; my $filename; ($filename,undef) = split /\t/,$originalslurp[$next],2; print "Content-Type: text/html\n\n"; print '' if $In{page} =~ /^complete$/i; open R,"<${DataDirectory}/$filename"; print ; close R; print '' if $In{page} =~ /^complete$/i; exit; } # sub Display sub Parse { my $buffer; if ($ENV{REQUEST_METHOD} eq 'GET') { $buffer = $ENV{QUERY_STRING}; } else { read(STDIN,$buffer,$ENV{CONTENT_LENGTH}); } my @pairs = split(/&/,$buffer); for(@pairs) { my ($n,$v) = split(/=/,$_); $v =~ tr/+/ /; $v =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; $v =~ tr/\t/ /; $In{$n} = $v; } } # sub Parse sub ErrorHTML { my $s = join("\n

",@_); print "Content-Type: text/html\n\n"; print GetTop; print qq~

Message

~; print GetBottom; exit; } # sub ErrorHTML sub Overview { print "Content-Type: text/html\n\n"; print GetTop('Overview'); print <

You can rotate text ads or any other content, including images, sound, flash -- singly or in combination. You can display any amount of information -- even entire web pages. (It can be used to rotate web pages if you're testing for marketing or other purposes.)

Every time the script is called, it displays the next content. When it reaches the end, it starts at the beginning again.

Your content can be displayed on the page with SSI or inside a popup window. To view example code, click the applicable button:

OVERVIEW print GetBottom; exit; } # sub Overview sub ExampleSSI { print "Content-Type: text/html\n\n"; print GetTop('Example SSI'); print <

Code for implementing Master Merry-Go-Round to display contant as a Server Side Include for seamless integration into a web page.

On most servers, this requires a .shtml page file name extenstion. Ask your server admin if you're unsure about their requirements.

The code is presented in two different ways. Use whichever works best for you.

EXAMPLESSI print GetBottom; exit; } # sub ExampleSSI sub ExamplePopup { print "Content-Type: text/html\n\n"; print GetTop('Example Popup'); print <Code for implementing a Master Merry-Go-Round popup box.

The code is presented in two different ways. Use whichever works best for you.

<HTML> <HEAD> <script type="text/javascript" language="JavaScript"> </script> </HEAD> <BODY> <a href="javascript:MMGR()">Click for popup</a> </BODY> </HTML>

EXAMPLEPOPUP print GetBottom; exit; } # sub ExamplePopup sub DisplayControlPanel { unless($In{admin} eq $Password) { print "Location: $ENV{HTTP_REFERER}\n\n"; exit; } my @originalslurp = (); LockFile; if(open R,"<${DataDirectory}/$DBname$DBextension") { @originalslurp = ; close R; chomp @originalslurp; } UnLockFile; my($next,$howmany) = split /\t/,$originalslurp[0],2; print "Content-Type: text/html\n\n"; print GetTop('Main Menu'); print <

Tech Support at http://willmaster.com/master/techsupport/

TOPTHECONTROLPANELPAGE if($originalslurp[1]) { $next++; $next = 1 if $next > $howmany; print <

Currently, you have $howmany different content display blocks.

Content block number $next is next in line for display.

INSIDE1 for(1..$#originalslurp) { my($filename,$sequence,$filenum,$title) = split /\t/,$originalslurp[$_]; $title = ForDisplay($title); print < INSIDEMID } print <
INSIDE2 } print GetBottom; exit; } # sub DisplayControlPanel sub UpdateAddContent { ErrorHTML('A title must be specified.') unless $In{title} =~ /\w/; ErrorHTML('Please provide some kind of content.') unless $In{content} =~ /\w/; if($In{content} =~ /\n/) { $In{content} =~ s/\r//gs; } else { $In{content} =~ s/\r/\n/gs; } my @originalslurp = ("0\t0\t0\t0"); LockFile; if(open R,"<${DataDirectory}/$DBname$DBextension") { @originalslurp = ; close R; chomp @originalslurp; } UnLockFile; my($filename,$sequence,$filenum,$title) = split /\t/,$originalslurp[$#originalslurp]; my($next,$howmany) = split /\t/,$originalslurp[0],2; $howmany++; $originalslurp[0] = "$next\t$howmany"; $title = $In{title}; $filenum++; $sequence = @originalslurp; $filename = "$DBname$filenum$DBextension"; push @originalslurp,"$filename\t$sequence\t$filenum\t$title"; LockFile; open W,">${DataDirectory}/$DBname$DBextension"; for(@originalslurp) { print W "$_\n"; } close W; UnLockFile; open W,">${DataDirectory}/$filename"; print W $In{content}; close W; unlink "${DataDirectory}/$TrackFile$DBextension"; } # UpdateAddContent sub AddContent { print "Content-Type: text/html\n\n"; print GetTop('Add Content'); print <
$_ $title

Give this content a name you will recognize:

Put your content here (HTML okay):

THECONTROLPANELPAGE print GetBottom; exit; } # sub AddContent sub UpdateEditContent { ErrorHTML('A title must be specified.') unless $In{title} =~ /\w/; ErrorHTML('Please provide some kind of content.') unless $In{content} =~ /\w/; if($In{content} =~ /\n/) { $In{content} =~ s/\r//gs; } else { $In{content} =~ s/\r/\n/gs; } LockFile; open R,"<${DataDirectory}/$DBname$DBextension"; my @originalslurp = ; close R; UnLockFile; chomp @originalslurp; my $t; for $t (@originalslurp) { if(index($t,"$In{filename}\t") == 0) { my ($filename,$sequence,$filenum,$title) = split /\t/,$t; $title = $In{title}; $t = join "\t",$filename,$sequence,$filenum,$title; last; } } LockFile; open W,">${DataDirectory}/$DBname$DBextension"; for(@originalslurp) { print W "$_\n"; } close W; UnLockFile; open W,">${DataDirectory}/$In{filename}"; print W $In{content}; close W; unlink "${DataDirectory}/$TrackFile$DBextension"; } # UpdateEditContent sub EditContent { LockFile; open R,"<${DataDirectory}/$DBname$DBextension"; my @originalslurp = ; close R; UnLockFile; chomp @originalslurp; my $filename = "$DBname$In{editcontent}$DBextension"; my($title,$content); for(@originalslurp) { if(index($_,"$filename\t") == 0) { (undef,undef,undef,$title) = split /\t/; last; } } open R,"<${DataDirectory}/$filename"; { my @p = ; close R; $content = join '',@p; } $title = ForDisplay($title); $content = ForDisplay($content); print "Content-Type: text/html\n\n"; print GetTop('Edit Content'); print <

The content's name for recognition:

The content (HTML okay):
$content

THECONTROLPANELPAGE print GetBottom; exit; } # sub EditContent sub UpdateDeleteContent { unlink "${DataDirectory}/$In{filename}"; LockFile; open R,"<${DataDirectory}/$DBname$DBextension"; my @originalslurp = ; close R; UnLockFile; chomp @originalslurp; my($next,$howmany) = split /\t/,$originalslurp[0],2; $howmany--; $originalslurp[0] = "$next\t$howmany"; my $t; for $t (@originalslurp) { if(index($t,"$In{filename}\t") == 0) { $t = ''; last; } } LockFile; open W,">${DataDirectory}/$DBname$DBextension"; for(@originalslurp) { print W "$_\n" if $_; } close W; UnLockFile; unlink "${DataDirectory}/$TrackFile$DBextension"; } # UpdateDeleteContent sub DeleteContent { LockFile; open R,"<${DataDirectory}/$DBname$DBextension"; my @originalslurp = ; close R; UnLockFile; chomp @originalslurp; my $filename = "$DBname$In{deletecontent}$DBextension"; my($title,$content); for(@originalslurp) { if(index($_,"$filename\t") == 0) { (undef,undef,undef,$title) = split /\t/; last; } } open R,"<${DataDirectory}/$filename"; { my @p = ; close R; $content = join '',@p; } print "Content-Type: text/html\n\n"; print GetTop('Delete Content'); print <

Name:
$title

Content:
$content

THECONTROLPANELPAGE print GetBottom; exit; } # sub DeleteContent sub ControlPanel { for(keys %In) { if(/\Aedit\_/ and $In{$_}) { (undef,$In{editcontent}) = split /\_/; last; } if(/\Adelete\_/ and $In{$_}) { (undef,$In{deletecontent}) = split /\_/; last; } } CONTROLPANELSWITCHER: { if($In{addcontent}) { AddContent; last CONTROLPANELSWITCHER; } if($In{updateaddcontent}) { UpdateAddContent; last CONTROLPANELSWITCHER; } if($In{editcontent}) { EditContent; last CONTROLPANELSWITCHER; } if($In{updateeditcontent}) { UpdateEditContent; last CONTROLPANELSWITCHER; } if($In{deletecontent}) { DeleteContent; last CONTROLPANELSWITCHER; } if($In{updatedeletecontent}) { UpdateDeleteContent; last CONTROLPANELSWITCHER; } } # CONTROLPANELSWITCHER &DisplayControlPanel; } # sub ControlPanel Parse; Overview if $In{overview}; ExampleSSI if $In{examplessi}; ExamplePopup if $In{examplepopup}; ControlPanel if $In{admin}; Display;

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