$Ext = 'txt';
		} elsif($ContentType =~ /^text\/html$/i || $FileExt =~ /html?/i || $$DATA =~ /<\s*HTML(?:.|\n)*?>/i) {	# HTML File
			$Ext = 'html';
		} elsif($ContentType =~ /^image\/x-xbitmap$/i || $FileExt =~ /^xbm$/i) {								# XBM(x-BitMap) Image
			my $XbmName = $1;
			my ($XbmWidth, $XbmHeight);
			if($$DATA =~ /\#define\s*$XbmName\_width\s*(\d+)/i) {
				$XbmWidth = $1;
			}
			if($$DATA =~ /\#define\s*$XbmName\_height\s*(\d+)/i) {
				$XbmHeight = $1;
			}
			if($XbmWidth && $XbmHeight) {
				$Ext = 'xbm';
				$ImageWidth		= $XbmWidth;
				$ImageHeight	= $XbmHeight;
			}
		} else {		#
			$Ext = 'txt';
		}
	}

	# image
	if(!$Ext && ($UnknownType || $ContentType =~ /^image\//i)) {
		# PNG
		if($$DATA =~ /^\x89PNG\x0D\x0A\x1A\x0A/) {
			if(substr($$DATA, 12, 4) eq 'IHDR') {
				$Ext = 'png';
				($ImageWidth, $ImageHeight) = unpack("N2", substr($$DATA, 16, 8));
			}
		} elsif($$DATA =~ /^GIF8(?:9|7)a/) {															# GIF89a(modified), GIF89a, GIF87a
			$Ext = 'gif';
			($ImageWidth, $ImageHeight) = unpack("v2", substr($$DATA, 6, 4));
		} elsif($$DATA =~ /^II\x2a\x00\x08\x00\x00\x00/ || $$DATA =~ /^MM\x00\x2a\x00\x00\x00\x08/) {	# TIFF
			$Ext = 'tif';
		} elsif($$DATA =~ /^BM/) {																		# BMP
			$Ext = 'bmp';
		} elsif($$DATA =~ /^\xFF\xD8\xFF/ || $$DATA =~ /JFIF/) {										# JPEG
			my $HeaderPoint = index($$DATA, "\xFF\xD8\xFF", 0);
			my $Point = $HeaderPoint + 2;
			while($Point < $DataLength) {
				my($Maker, $MakerType, $MakerLength) = unpack("C2n",substr($$DATA,$Point,4));
				if($Maker != 0xFF || $MakerType == 0xd9 || $MakerType == 0xda) {
					last;
				} elsif($MakerType >= 0xC0 && $MakerType <= 0xC3) {
					$Ext = 'jpg';
					($ImageHeight, $ImageWidth) = unpack("n2", substr($$DATA, $Point + 5, 4));
					if($HeaderPoint > 0) {
						$$DATA = substr($$DATA, $HeaderPoint);
						$DataLength = length($$DATA);
					}
					last;
				} else {
					$Point += $MakerLength + 2;
				}
			}
		}
	}

	# audio
	if(!$Ext && ($UnknownType || $ContentType =~ /^audio\//i)) {
		# MIDI Audio
		if($$DATA =~ /^MThd/) {
			$Ext = 'mid';
		} elsif($$DATA =~ /^\x2esnd/) {		# ULAW Audio
			$Ext = 'au';
		} elsif($$DATA =~ /^RIFF/ || $$DATA =~ /^ID3/ && $$DATA =~ /RIFF/) {
			my $HeaderPoint = index($$DATA, "RIFF", 0);
			$_ = substr($$DATA, $HeaderPoint + 8, 8);
			if(/^WAVEfmt $/) {
				# WAVE
				if(unpack("V",substr($$DATA, $HeaderPoint + 16, 4)) == 16) {
					$Ext = 'wav';
				} else {					# RIFF WAVE MP3
					$Ext = 'mp3';
				}
			} elsif(/^RMIDdata$/) {			# RIFF MIDI
				$Ext = 'rmi';
			} elsif(/^RMP3data$/) {			# RIFF MP3
				$Ext = 'rmp';
			}
			if($ContentType =~ /^audio\//i) {
				$Infomation .= '(RIFF '. substr($$DATA, $HeaderPoint + 8, 4). ')';
			}
		}
	}

	# a binary file
	unless ($Ext) {
		# PDF image
		if($$DATA =~ /^\%PDF/) {
			# Picture size is not measured.
			$Ext = 'pdf';
		} elsif($$DATA =~ /^FWS/) {		# Shockwave Flash
			$Ext = 'swf';
		} elsif($$DATA =~ /^RIFF/ || $$DATA =~ /^ID3/ && $$DATA =~ /RIFF/) {
			my $HeaderPoint = index($$DATA, "RIFF", 0);
			$_ = substr($$DATA,$HeaderPoint + 8, 8);
			# AVI
			if(/^AVI LIST$/) {
				$Ext = 'avi';
			}
			if($ContentType =~ /^video\//i) {
				$Infomation .= '(RIFF '. substr($$DATA, $HeaderPoint + 8, 4). ')';
			}
		} elsif($$DATA =~ /^PK/) {			# ZIP Compress File
			$Ext = 'zip';
		} elsif($$DATA =~ /^MSCF/) {		# CAB Compress File
			$Ext = 'cab';
		} elsif($$DATA =~ /^Rar\!/) {		# RAR Compress File
			$Ext = 'rar';
		} elsif(substr($$DATA, 2, 5) =~ /^\-lh(\d+|d)\-$/) {		# LHA Compress File
			$Infomation .= "(lh$1)";
			$Ext = 'lzh';
		} elsif(substr($$DATA, 325, 25) eq "Apple Video Media Handler" || substr($$DATA, 325, 30) eq "Apple \x83\x72\x83\x66\x83\x49\x81\x45\x83\x81\x83\x66\x83\x42\x83\x41\x83\x6E\x83\x93\x83\x68\x83\x89") {
			# QuickTime
			$Ext = 'mov';
		}
	}

	# Header analysis failure
	unless ($Ext) {
		# It will be followed if it applies for the MIME type from the browser.
		foreach (keys %UPLOAD_CONTENT_TYPE_LIST) {
			next unless ($_);
			if($ContentType =~ /^$_$/i) {
				$Ext = $UPLOAD_CONTENT_TYPE_LIST{$_};
				$ContentName = &CheckContentExt($Ext);
				if(
					grep {$_ eq $Ext;} (
						'png',
						'gif',
						'jpg',
						'xbm',
						'tif',
						'bmp',
						'pdf',
						'swf',
						'mov',
						'zip',
						'cab',
						'lzh',
						'rar',
						'mid',
						'rmi',
						'au',
						'wav',
						'avi',
						'exe'
					)
				) {
					$Infomation .= ' / Header analysis failure';
				}
				if($Ext ne $FileExt && &CheckContentExt($FileExt) eq $ContentName) {
					$Ext = $FileExt;
				}
				last;
			}
		}
		# a MIME type is unknown--It judges from an extension.
		unless ($Ext) {
			$ContentName = &CheckContentExt($FileExt);
			if($ContentName) {
				$Ext = $FileExt;
				$Infomation .= ' /	MIME type is unknown('. $ContentType. ')';
				last;
			}
		}
	}

#	$ContentName = &CheckContentExt($Ext)	unless($ContentName);
#	if($Ext && $ContentName) {
#		$ContentName .=  $Infomation;
#	} else {
#		&upload_error(
#			'Extension Error',
#			"$FileName A not corresponding extension ($Ext)<BR>The extension which can be responded ". join(',', sort values(%UPLOAD_EXT_LIST))
#		);
#	}

#	# SSI Tag Deletion
#	if($Ext =~ /.?html?/ && $$DATA =~ /<\!/) {
#		foreach (
#			'config',
#			'echo',
#			'exec',
#			'flastmod',
#			'fsize',
#			'include'
#		) {
#			$$DATA =~ s/\#\s*$_/\&\#35\;$_/ig
#		}
#	}

	return (
		$FileName,
		$Ext,
		int($DataLength / 1024 + 1),
		$ImageWidth,
		$ImageHeight,
		$ContentName
	);
}

##############################################################################
# Summary
#
# Extension discernment
#
# Parameters
# Returns
# Memo
##############################################################################

sub CheckContentExt
{

	my($Ext) = @_;
	my $ContentName;
	foreach (keys %UPLOAD_EXT_LIST) {
		next	unless ($_);
		if($_ && $Ext =~ /^$_$/) {
			$ContentName = $UPLOAD_EXT_LIST{$_};
			last;
		}
	}
	return $ContentName;

}

##############################################################################
# Summary
#
# Form decode
#
# Parameters
# Returns
# Memo
##############################################################################
sub Encode
{

	my($value,$Trans) = @_;

#	my $FormCode = &jcode::getcode($value) || $FormCodeDefault;
#	$FormCodeDefault ||= $FormCode;
#
#	if($Trans && $TRANS_2BYTE_CODE) {
#		if($FormCode ne 'euc') {
#			&jcode::convert($value, 'euc', $FormCode);
#		}
#		&jcode::tr(
#			$value,
#			"\xA3\xB0-\xA3\xB9\xA3\xC1-\xA3\xDA\xA3\xE1-\xA3\xFA",
#			'0-9A-Za-z'
#		);
#		if($CHARCODE ne 'euc') {
#			&jcode::convert($value,$CHARCODE,'euc');
#		}
#	} else {
#		if($CHARCODE ne $FormCode) {
#			&jcode::convert($value,$CHARCODE,$FormCode);
#		}
#	}
#	if($CHARCODE eq 'euc') {
#		&jcode::h2z_euc($value);
#	} elsif($CHARCODE eq 'sjis') {
#		&jcode::h2z_sjis($value);
#	}

}

##############################################################################
# Summary
#
# Error Msg
#
# Parameters
# Returns
# Memo
##############################################################################

sub upload_error
{

	local($error_message)	= $_[0];
	local($error_message2)	= $_[1];

	print "Content-type: text/html\n\n";
	print<<EOF;
<HTML>
<HEAD>
<TITLE>Error Message</TITLE></HEAD>
<BODY>
<table border="1" cellspacing="10" cellpadding="10">
	<TR bgcolor="#0000B0">
	<TD bgcolor="#0000B0" NOWRAP><font size="-1" color="white"><B>Error Message</B></font></TD>
	</TR>
</table>
<UL>
<H4> $error_message </H4>
$error_message2 <BR>
</UL>
</BODY>
</HTML>
EOF
	&rm_tmp_uploaded_files; 		# Image Temporary deletion
	exit;
}

##############################################################################
# Summary
#
# Image Temporary deletion
#
# Parameters
# Returns
# Memo
##############################################################################

sub rm_tmp_uploaded_files
{
	if($img_data_exists == 1){
		sleep 1;
		foreach $fname_list(@NEWFNAMES) {
			if(-e "$img_dir/$fname_list") {
				unlink("$img_dir/$fname_list");
			}
		}
	}

}
1;