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EmbeddedPerlMinifyJS

Example module to minify javascript files

Minimizing the javascript files make them compact hence faster to download.

I use the perl module from CPAN that can be obtained here; http://search.cpan.org/~pmichaux/JavaScript-Minifier/

You can read more about the origional jsmin here: http://www.crockford.com/javascript/jsmin.html


nginx.conf

http {
  perl_modules perl; 
 
  # Get this module from the CPAN and put the file in this directory.
  # or install it systemwide
  perl_require Javascript/Minifier.pm; 
  perl_require Minify.pm; 
 
  root /var/www;
  server {
    location / {
      index  index.html index.htm;
    }
 
    location ~ \.js$  {
      perl Minify::handler;
    }
  } 
}

perl/Minify.pm

package Minify;
use nginx;
use JavaScript::Minifier qw(minify);
 
sub handler {
  my $r=shift;
  my $cache_dir="/tmp";  # Cache directory where minified files will be kept
  my $cache_file=$r->uri;
  $cache_file=~s!/!_!g;
  $cache_file=join("/", $cache_dir, $cache_file);
  my $uri=$r->uri;
  my $filename=$r->filename;
 
  return DECLINED unless -f $filename;
 
  if (! -f $cache_file) {
    open(INFILE, $filename) or die "Error reading file: $!";
    open(OUTFILE, '>' . $cache_file ) or die "Error writting file: $!";
    minify(input => *INFILE, outfile => *OUTFILE);
    close(INFILE);
    close(OUTFILE);
  }
  $r->send_http_header("application/javascript");
  $r->sendfile($cache_file);
  return OK;
}
1;
__END__