#!/usr/bin/perl -w
#
# script smb2www-2.cgi : provide web interface to access smb filesystem
# with Filesys::SmbClient and libsmclient.so
# Copyright 2001 A.Barbet alian@alianwebserver.com.  All rights reserved.
#
# $Revision: 1.6 $
# $Date: 2005/03/04 12:06:53 $
# $Author: alian $
#------------------------------------------------------------------------------

use CGI qw/:standard :html3 :netscape escape unescape/;
use CGI::Carp qw/fatalsToBrowser/;
use strict;
use Filesys::SmbClient;
$|=1;
# ------ Config --------------------------------------------------------------#
my $SN = $ENV{SCRIPT_NAME} || "smb2www-2.cgi";
my $mimetype     = "/etc/mime.types";
my $user         = "alian";
my $password     = "alian";
my $workgroup    = 'alian';                      # optional
my $maskFile     = 0666;                         # for upload file
my $maskDir      = 0755;                         # for created dir
my $css          = "http://saturne/smb2www.css"; # for fun
# ------ End config ----------------------------------------------------------#
print header;
my $smb = new Filesys::SmbClient(username  => $user,
				 password  => $password,
				 workgroup => $workgroup,
				 debug     => 0,
				 flags => SMB_CTX_FLAG_FALLBACK_AFTER_KERBEROS)
  || die "Can't connect:$!\n";

&main();

sub main {
  my $buffer;
  if (param('browse')) {
  # browse a share or a dir
    print browse(param('browse'));
  }elsif (param('readfile')) {
    # read a file
    print read_file(param('readfile'));
  } elsif (param('filename')) {
    # put a file
    print upload_file(param('filename'), param('dir')); 
  } elsif (param('directory')) {
    # create a dir
    my $dir = param('dir').'/'.param('directory');
    $smb->mkdir($dir, $maskDir) ||
      print header,"Can't create ", $dir, ":$!\n";
    print browse(param('dir'));
  } elsif (param('delete') || param('deleteDir')) {
    # delete a file
    my $dir;
    foreach my $f (param('delete')) {
      if (unescape($f)=~/^(.*)\/[^\/]*$/) { $dir = $1; }
      my $res = $smb->unlink(unescape($f));
      if ($res) { print unescape($f)," deleted<br>\n"; }
      else { print "Can't delete ",unescape($f),":$!<br>\n"; }
    }
    foreach my $f (param('deleteDir')) {
      if (unescape($f)=~/^(.*)\/[^\/]*$/) { $dir = $1; }
      my $res = $smb->rmdir_recurse(unescape($f));
      if ($res) { print unescape($f)," deleted<br>\n"; }
      else { print "Can't delete ",unescape($f),":$!<br>\n"; }
    }
    print "<a href=\"$SN?browse=$dir\">Back to $dir</a>",
      end_html;
  }
  # first form
  else {
    if ($workgroup) {
      print browse("smb://".$workgroup); 
    } else {
	start_html
	  ( -'title'  => 'smb2www2',
	    -'author' => 'alian@alianwebserver.com',
	    -'meta'   => {'keywords'  => 'smb',
			  -'copyright'=>'Copyright 2001 AlianWebServer'},
	    -'style'  => {'src' => $css},
	    -'dtd'    => '-//W3C//DTD HTML 4.0 Transitional//EN"'.
	    ' "http://www.w3.org/TR/REC-html40/loose.dtd')."\n";
    }
    print h1("smb2www - the come back"),
      start_form.
	textfield(-name=>'browse')."(ex: <i>smb://my_smb_server</i> or
                                         <i>smb://my_workgroup</i>)<br>".
					   submit."\n".end_form;
  }
  print end_html,"\n";
}

#------------------------------------------------------------------------------
# Method that browse content of $rep
#------------------------------------------------------------------------------
sub browse  {
  my ($rep) = @_;
  my ($i,$j,$tf,@lf,@lr,@ls,@lm,$buffer, $style)=(0,0,0);
  chop($rep) if ($rep=~/\/$/ && $rep ne 'smb://');
  return undef if (!$rep);

  # Read directory
  my $D = $smb->opendir($rep) || die "Can't read $rep:$!\n";
  my @f = $smb->readdir_struct($D);
  $smb->close($D);
  # Sort file by name
  @f = sort { $a->[1] cmp $b->[1] } @f;

  # For each item ...
  foreach my $f (@f) {
    # Reformat url for dir . and ..
    # and build new url in $ref
    my $ref;
    if ($f->[1] eq ".") {
      $ref = $rep; 
    } elsif ($f->[1] eq "..") {
      if ($rep=~/(.*)\/[^\/]*$/) {
	$ref = $1;
      }
    } elsif ($f->[0] == SMBC_SERVER) {
      $ref = "smb://".$f->[1];
    } elsif ($f->[0] == SMBC_WORKGROUP) {
      $ref = $rep.$f->[1];
    } else { $ref = $rep.'/'.$f->[1]; }
    my $refe = escape($ref);

    if ($f->[0] == SMBC_DIR) {
      # A directory

      # modulo for css style
      if (++$i % 2) { $style = "style1"; }
      else { $style = "style2"; }
      my $z="<input type=\"checkbox\" name=\"deleteDir\" 
                          value=\"$refe\">";
      # dont show delete for . and ..
      if ($f->[1] eq '.' || $f->[1] eq '..') { $z=" "; }
      my $item = "<tr class=\"$style\">
  <td class=\"name\" colspan=\"3\">
      [Dir] <a class=\"dir\" href=\"$SN?browse=$refe\">". $f->[1]."</a>
  </td>
  <td>$z</td>
</tr>\n";
      push(@lr, $item);

    } elsif ($f->[0] == SMBC_FILE) {
      # A file

      # modulo for css style
      if (++$j % 2) { $style = "style1"; }
      else { $style = "style2"; }
      my @l = $smb->stat($ref);
      my $item = "<tr class=\"$style\">
  <td class=\"name\"><a class=\"file\" href=\"$SN?readfile=$refe\">".
    $f->[1]."</a></td>
  <td class=\"size\">".sizeOf($l[7])."</td>
  <td class=\"time\">".localtime($l[11])."</td>
  <td><input type=\"checkbox\" name=\"delete\" value=\"$refe\"></td>
</tr>\n";
      push(@lf, $item); $tf+=$l[7];

    } elsif ($f->[0] == SMBC_FILE_SHARE) {
      # a share

      # modulo for css style
      if (++$i % 2) { $style = "style1"; }
      else { $style = "style2"; }
      my $item = "<tr class=\"$style\">
  <td class=\"name\">[Share] <a class=\"name\" href=\"$SN?browse=$refe\">".
    $f->[1]."</a></td>
  <td class=\"comment\">".$f->[2]."</td>
</tr>";
		push(@ls, $item);

    } elsif ($f->[0] == SMBC_SERVER) {
      # a server

      push(@lm, "[Server] <a class=\"server\" href=\"$SN?browse=$refe\">".
	   $f->[1]."</a>");

    } elsif ($f->[0] == SMBC_WORKGROUP) {
      # a workgroup

      push(@lm,"[Workgroup] <a class=\"workgroup\" href=\"$SN?browse=$refe\">".
	   $f->[1]."</a>"); }
  }

  #
  # Html format
  #
  $buffer .= join("<br>\n", @lm)."<br>\n" if ($#lm != -1);
  if ($#ls != -1) { 
    $buffer .= "<table class=\"share\">".join(" ", @ls)."</table><br>\n"; 
  }
  $buffer.="<form onsubmit=\"return confirm('Confirm ?')\">
<table border=\"1\">";
  if ($#lr != -1) {
    $buffer .= join(" ", @lr);
  }
  if ($#lf != -1) {
    $buffer.= join("\n", @lf);
  }

  $buffer.="<td>".$#lf." file(s)</td>
            <td>".sizeOf($tf)."</td><td></td>
            <td><input type=\"submit\" value=\"delete\">"
	      if ($#lf != -1 or $#lr != -1);

  $buffer.="</table></form>\n";
  if ($#ls == -1 && $#lm == -1 && $#f != -1) {
    $buffer.= "<ul><li>".start_multipart_form().
      "Put a file on $rep:<br>".
	filefield(-name=>'filename',-size=>45).
	hidden(-name=>'dir',-value=>$rep).
	submit('download','Upload').
	endform."</li>\n<li>".
	start_multipart_form().
	  "Create a dir on $rep:<br>".
	textfield(-name=>'directory',-size=>45).
	hidden(-name=>'dir',-value=>$rep).
        submit('download','Create').
	endform."</li></ul>";
  }
  $buffer =
    start_html
      ( -'title'  => 'smb2www2',
	-'author' => 'alian@alianwebserver.com',
	-'meta'   => {'keywords'  => 'smb',
		      -'copyright'=>'Copyright 2001 AlianWebServer'},
	-'style'  => {'src' => $css},
	-'dtd'    => '-//W3C//DTD HTML 4.0 Transitional//EN"'.
	' "http://www.w3.org/TR/REC-html40/loose.dtd')."\n".
	  h1("You are on: ".linksOf(unescape($rep))).$buffer;
  return $buffer;
}

#------------------------------------------------------------------------------
# Method that display file $file
#------------------------------------------------------------------------------
sub read_file
  {
    my ($file)=@_;
    my ($buffer, $ext);
    my $FD = $smb->open($file, 0666) || die "Can't read $file:$!\n";
    while (my $buf = $smb->read($FD, 1024)) { $buffer.=$buf; }
    $smb->close($FD);
    if (param('readfile')=~/\.(\w{0,5})$/) { $ext = $1; }
    return "Content-type: ".mimetype($ext, $mimetype)."\n\n".$buffer;
  }

#------------------------------------------------------------------------------
# Method that put a file push with http on directory $dir
#------------------------------------------------------------------------------
sub upload_file {
  my ($file, $dir)= @_;
  my($nom);
  if ($file=~/.*\\(.*)$/) {$nom=$1;}
  else {$nom=$file;}
  $nom = $dir."/".$file;
  my $FD = $smb->open(">$nom", 0666) || die "Can't create $nom:$!\n";
  while (<$file>) { $smb->write($FD, $_); }
  $smb->close($FD);
  return browse($dir);
}

#------------------------------------------------------------------------------
# Determine mimetype, given a file extension
#------------------------------------------------------------------------------
sub mimetype {
  my $test = lc $_[0];
  my $file = $_[1];
  my $type;
  open (MIME, $file) || die "can't read $file:$!\n";
  RULE: while ( <MIME> ) {
      my $line = $_;
      if ( not ($line =~ /^$/) and not ($line =~ /^\#/) ) {
	if ( $line =~ /^([^\s]+)\s+([\w\ ]+)/ ) {
	  $type = $1;
	  if ( $2 =~ /$test/ ) { last RULE; } 
	  else { $type = ""; }
	}
      }
    }
  close MIME;
  $type = "application/octet-stream" if ($type eq "");
  return $type;
}

#------------------------------------------------------------------------------
# For a given url, split for each / and create a links for each parts
#------------------------------------------------------------------------------
sub linksOf {
  my ($url)=@_;
  my ($v,$u)=("smb://");
  if ($url =~ /^smb:\/\/(.+)/) {
    my $l=$1;
    if ($l=~/\//) {
      my @l = split(/\//,$l);
      foreach my $part (@l) {
	$v.=$part."/";
	$u.="<a href=\"$SN?browse=$v\">$part</a>/";
      }
    } else { $u = "<a href=\"$SN?browse=smb://$l\">$l</a>/"; }
  }
  if ($workgroup) {
    $u = "<a href=\"$SN?browse=smb://$workgroup\">smb://</a>".$u;
  } else { $u = "<a href=\"$SN?browse=smb://\">smb://</a>".$u; }
  return $u;
}


#------------------------------------------------------------------------------
# For a size in octets, return a size in o. ko. mo. go
#------------------------------------------------------------------------------
sub sizeOf  {
  my $size = shift;
  if ($size < 2**10) { return $size." o."; }
  elsif ($size < 2**20) { return sprintf("%.1f", $size/2**10)."Ko."; }
  elsif ($size < 2**30) { return sprintf("%.1f",$size/2**20)."Mo."; }
  elsif ($size < 2**40) { return sprintf("%.1f",$size/2**30)."Go."; }
}