modules/Tool.pm

   1 package Tool;
   2
   3 #
   4 # Dev-Editor - Module Tool
   5 #
   6 # Some shared sub routines
   7 #
   8 # Author:        Patrick Canterino <patrick@patshaping.de>
   9 # Last modified: 2004-12-16
  10 #
  11
  12 use strict;
  13
  14 use vars qw(@EXPORT);
  15
  16 use CGI qw(redirect
  17            escape
  18            virtual_host
  19            https);
  20
  21 use Cwd qw(abs_path);
  22 use File::Spec;
  23
  24 ### Export ###
  25
  26 use base qw(Exporter);
  27
  28 @EXPORT = qw(check_path
  29              clean_path
  30              devedit_reload
  31              equal_url
  32              file_name
  33              mode_string
  34              upper_path);
  35
  36 # check_path()
  37 #
  38 # Check if a virtual path is above a virtual root directory
  39 # (currently no check if the path exists - check otherwise!)
  40 #
  41 # Params: 1. Virtual root directory
  42 #         2. Virtual path to check
  43 #
  44 # Return: Array with the physical and the cleaned virtual path;
  45 #         false, if the submitted path is above the root directory
  46
  47 sub check_path($$)
  48 {
  49  my ($root,$path) = @_;
  50
  51  # Clean root path
  52
  53  $root = abs_path($root);
  54  $root = File::Spec->canonpath($root);
  55
  56  $path =~ s!^/{1}!!;
  57  $path = $root."/".$path;
  58
  59  # We extract the last part of the path and create the absolute path
  60
  61  my $first = upper_path($path);
  62  my $last  = file_name($path);
  63
  64  $first = abs_path($first);
  65  $path  = $first."/".$last;
  66
  67  $first = File::Spec->canonpath($first);
  68  $path  = File::Spec->canonpath($path);
  69
  70  # Check if the path is above the root directory
  71
  72  return if(index($path,$root) != 0);
  73  return if($first eq $root && $last =~ m!^(/|\\)?\.\.(/|\\)?$!);
  74
  75  # Create short path name
  76
  77  my $short_path = substr($path,length($root));
  78  $short_path =~ tr!\\!\/!;
  79  $short_path = "/".$short_path if($short_path !~ m!^/!);
  80  $short_path = $short_path."/" if($short_path !~ m!/$! && -d $path);
  81
  82  return ($path,$short_path);
  83 }
  84
  85 # clean_path()
  86 #
  87 # Clean up a path logically and replace backslashes with
  88 # normal slashes
  89 #
  90 # Params: Path
  91 #
  92 # Return: Cleaned path
  93
  94 sub clean_path($)
  95 {
  96  my $path =  shift;
  97  $path    =  File::Spec->canonpath($path);
  98  $path    =~ tr!\\!/!;
  99
 100  return $path;
 101 }
 102
 103 # devedit_reload()
 104 #
 105 # Create a HTTP redirection header to load Dev-Editor
 106 # with some other parameters
 107 #
 108 # Params: Hash Reference (will be merged to a query string)
 109 #         (optional)
 110 #
 111 # Return: HTTP redirection header (Scalar Reference)
 112
 113 sub devedit_reload(;$)
 114 {
 115  my $params = shift;
 116
 117  # Detect the protocol (simple HTTP or SSL encrypted HTTP)
 118  # and check if the server listens on the default port
 119
 120  my $protocol = "";
 121  my $port     = "";
 122
 123  if(https)
 124  {
 125   # SSL encrypted HTTP (HTTPS)
 126
 127   $protocol = "https";
 128   $port     = ":".$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 443);
 129  }
 130  else
 131  {
 132   # Simple HTTP
 133
 134   $protocol = "http";
 135   $port     = ":".$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 80);
 136  }
 137
 138  # The following code is grabbed from Template::_query of
 139  # Andre Malo's selfforum (http://sourceforge.net/projects/selfforum/)
 140  # and modified by Patrick Canterino
 141
 142  my $query = "";
 143
 144  if(ref($params) eq "HASH")
 145  {
 146   $query = '?'.join ('&' =>
 147     map {
 148       (ref)
 149       ? map{escape ($_).'='.escape ($params -> {$_})} @{$params -> {$_}}
 150       : escape ($_).'='.escape ($params -> {$_})
 151     } keys %$params
 152   );
 153  }
 154
 155  # Create the redirection header
 156
 157  my $header = redirect($protocol."://".virtual_host.$port.$ENV{'SCRIPT_NAME'}.$query);
 158
 159  return \$header;
 160 }
 161
 162 # equal_url()
 163 #
 164 # Create URL equal to a file or directory
 165 #
 166 # Params: 1. HTTP root
 167 #         2. Relative path
 168 #
 169 # Return: Formatted link (String)
 170
 171 sub equal_url($$)
 172 {
 173  my ($root,$path) = @_;
 174  my $url;
 175
 176  $root =~ s!/$!!;
 177  $path =~ s!^/!!;
 178  $url  =  $root."/".$path;
 179
 180  return $url;
 181 }
 182
 183 # file_name()
 184 #
 185 # Return the last part of a path
 186 #
 187 # Params: Path
 188 #
 189 # Return: Last part of the path
 190
 191 sub file_name($)
 192 {
 193  my $path =  shift;
 194  $path    =~ tr!\\!/!;
 195
 196  unless($path eq "/")
 197  {
 198   $path = substr($path,0,-1) if($path =~ m!/$!);
 199   $path = substr($path,rindex($path,"/")+1);
 200  }
 201
 202  return $path;
 203 }
 204
 205 # mode_string()
 206 #
 207 # Convert a file mode number into a human readable string (rwxr-x-r-x)
 208 # (also supports SetUID, SetGID and Sticky Bit)
 209 #
 210 # Params: File mode number
 211 #
 212 # Return: Human readable mode string
 213
 214 sub mode_string($)
 215 {
 216  my $mode   = shift;
 217  my $string = "";
 218
 219  # User
 220
 221  $string  = ($mode & 00400) ? "r" : "-";
 222  $string .= ($mode & 00200) ? "w" : "-";
 223  $string .= ($mode & 00100) ? (($mode & 04000) ? "s" : "x") :
 224                                ($mode & 04000) ? "S" : "-";
 225
 226  # Group
 227
 228  $string .= ($mode & 00040) ? "r" : "-";
 229  $string .= ($mode & 00020) ? "w" : "-";
 230  $string .= ($mode & 00010) ? (($mode & 02000) ? "s" : "x") :
 231                                ($mode & 02000) ? "S" : "-";
 232
 233  # Other
 234
 235  $string .= ($mode & 00004) ? "r" : "-";
 236  $string .= ($mode & 00002) ? "w" : "-";
 237  $string .= ($mode & 00001) ? (($mode & 01000) ? "t" : "x") :
 238                                ($mode & 01000) ? "T" : "-";
 239
 240  return $string;
 241 }
 242
 243 # upper_path()
 244 #
 245 # Cut away the last part of a path
 246 #
 247 # Params: Path
 248 #
 249 # Return: Truncated path
 250
 251 sub upper_path($)
 252 {
 253  my $path =  shift;
 254  $path    =~ tr!\\!/!;
 255
 256  unless($path eq "/")
 257  {
 258   $path = substr($path,0,-1) if($path =~ m!/$!);
 259   $path = substr($path,0,rindex($path,"/")+1);
 260  }
 261
 262  return $path;
 263 }
 264
 265 # it's true, baby ;-)
 266
 267 1;
 268
 269 #
 270 ### End ###