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: 2004-11-13
  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 #
 110 # Return: HTTP redirection header (Scalar Reference)
 111
 112 sub devedit_reload($)
 113 {
 114  my $params = shift;
 115
 116  # Detect the protocol (simple HTTP or SSL encrypted HTTP)
 117  # and check if the server listens on the default port
 118
 119  my $protocol = "";
 120  my $port     = "";
 121
 122  if(https)
 123  {
 124   # SSL encrypted HTTP (HTTPS)
 125
 126   $protocol = "https";
 127   $port     = ":".$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 443);
 128  }
 129  else
 130  {
 131   # Simple HTTP
 132
 133   $protocol = "http";
 134   $port     = ":".$ENV{'SERVER_PORT'} if($ENV{'SERVER_PORT'} != 80);
 135  }
 136
 137  # The following code is grabbed from Template::_query of
 138  # Andre Malo's selfforum (http://sourceforge.net/projects/selfforum/)
 139  # and modified by Patrick Canterino
 140
 141  my $query = '?'.join ('&' =>
 142    map {
 143      (ref)
 144      ? map{escape ($_).'='.escape ($params -> {$_})} @{$params -> {$_}}
 145      : escape ($_).'='.escape ($params -> {$_})
 146    } keys %$params
 147  );
 148
 149  # Create the redirection header
 150
 151  my $header = redirect($protocol."://".virtual_host.$port.$ENV{'SCRIPT_NAME'}.$query);
 152
 153  return \$header;
 154 }
 155
 156 # equal_url()
 157 #
 158 # Create URL equal to a file or directory
 159 #
 160 # Params: 1. HTTP root
 161 #         2. Relative path
 162 #
 163 # Return: Formatted link (String)
 164
 165 sub equal_url($$)
 166 {
 167  my ($root,$path) = @_;
 168  my $url;
 169
 170  $root =~ s!/$!!;
 171  $path =~ s!^/!!;
 172  $url  =  $root."/".$path;
 173
 174  return $url;
 175 }
 176
 177 # file_name()
 178 #
 179 # Return the last part of a path
 180 #
 181 # Params: Path
 182 #
 183 # Return: Last part of the path
 184
 185 sub file_name($)
 186 {
 187  my $path =  shift;
 188  $path    =~ tr!\\!/!;
 189
 190  unless($path eq "/")
 191  {
 192   $path = substr($path,0,-1) if($path =~ m!/$!);
 193   $path = substr($path,rindex($path,"/")+1);
 194  }
 195
 196  return $path;
 197 }
 198
 199 # mode_string()
 200 #
 201 # Convert a file mode number into a human readable string (rwxr-x-r-x)
 202 # (also supports SetUID, SetGID and Sticky Bit)
 203 #
 204 # Params: File mode number
 205 #
 206 # Return: Human readable mode string
 207
 208 sub mode_string($)
 209 {
 210  my $mode   = shift;
 211  my $string = "";
 212
 213  # User
 214
 215  $string  = ($mode & 00400) ? "r" : "-";
 216  $string .= ($mode & 00200) ? "w" : "-";
 217  $string .= ($mode & 00100) ? (($mode & 04000) ? "s" : "x") :
 218                                ($mode & 04000) ? "S" : "-";
 219
 220  # Group
 221
 222  $string .= ($mode & 00040) ? "r" : "-";
 223  $string .= ($mode & 00020) ? "w" : "-";
 224  $string .= ($mode & 00010) ? (($mode & 02000) ? "s" : "x") :
 225                                ($mode & 02000) ? "S" : "-";
 226
 227  # Other
 228
 229  $string .= ($mode & 00004) ? "r" : "-";
 230  $string .= ($mode & 00002) ? "w" : "-";
 231  $string .= ($mode & 00001) ? (($mode & 01000) ? "t" : "x") :
 232                                ($mode & 01000) ? "T" : "-";
 233
 234  return $string;
 235 }
 236
 237 # upper_path()
 238 #
 239 # Cut away the last part of a path
 240 #
 241 # Params: Path
 242 #
 243 # Return: Truncated path
 244
 245 sub upper_path($)
 246 {
 247  my $path =  shift;
 248  $path    =~ tr!\\!/!;
 249
 250  unless($path eq "/")
 251  {
 252   $path = substr($path,0,-1) if($path =~ m!/$!);
 253   $path = substr($path,0,rindex($path,"/")+1);
 254  }
 255
 256  return $path;
 257 }
 258
 259 # it's true, baby ;-)
 260
 261 1;
 262
 263 #
 264 ### End ###