Listing 2: Second Version of Apache::TagNew

package Apache::TagNew;
use strict;
use Apache::Constants qw(OK DECLINED NOT_FOUND);
sub handler 
  {
    # Get the Apache request object
    my $r = shift;
    # Only handle text/html files
    return DECLINED unless ($r->content_type 
    eq "text/html");
    # Get the file we're trying to send
    if (open(FILE, $r->filename))
      {
	# Send an appropriate MIME header
	$r->send_http_header;
	# Slurp up files at once
	undef $/;
	# Grab the file's contents
	my ($contents) = (<FILE>);
	# Tag hyperlinks as new
	$contents =~ 
	s|<a\s+href=['"]?(\S+?)['"]?\s*>([\s\S]+?)</a>
	|label_url($r, $1, $2)|eigx;
	# Print the contents
	$r->print($contents);
	# Close the file handle
	close FILE;
	# Indicate that all went well
	return OK;
      }
    # produce an appropriate error message
    else
      {
	return NOT_FOUND;
      }
  }


# Subroutine for tagging URLs

sub label_url
  {
    # Get the URL and the text
    my $r = shift;
    my $url = shift;
    my $text = shift;
    my $label;
    # If the URL does not begin with "http://", 
    #then we can assume it
    # is on our system
    if ($url !~ m|^http://|)
      {
	# Check the modification date of the file
	my $filename = $r->document_root . $url;
	my $ctime = -M $filename;
	if ($ctime < 7)
	  {
	    $label = "<font color=\"red\">New!</font>";
	  }
      }
    # Return a value to the caller
    return "<a href=\"$url\">$text</a> $label";
  }
1;