htaccess.php

   1 <?php
   2
   3 /**
   4  * Generates the appropriate mod_rewrite rules in the htaccess file.
   5  */
   6
   7 require 'common.php';
   8
   9 $identifier_begin = '# BEGIN xhtml-compiler/main.php mod_rewrite';
  10 $identifier_end   = '# END xhtml-compiler/main.php mod_rewrite';
  11 $identifier_here  = '# HERE xhtml-compiler/main.php mod_rewrite';
  12
  13 if (file_exists('.htaccess')) {
  14
  15     // do time check
  16     $mtime_htaccess = filemtime('.htaccess');
  17     $mtime_config   = filemtime('xhtml-compiler/config.php');
  18     $mtime_dconfig  = filemtime('xhtml-compiler/config.default.php');
  19     $mtime_gen      = filemtime('xhtml-compiler/htaccess.php');
  20     if ($mtime_htaccess > $mtime_config &&
  21         $mtime_htaccess > $mtime_gen &&
  22         $mtime_htaccess > $mtime_dconfig
  23     ) {
  24         display_error_and_quit(503, false,
  25             'No changes detected in <tt>xhtml-compiler/config.php</tt> or <tt>xhtml-compiler/htaccess.php</tt>.');
  26     }
  27
  28     $contents = file_get_contents('.htaccess');
  29
  30     // do writeability check
  31     if (
  32         (
  33             strpos($contents, $identifier_begin) === false ||
  34             strpos($contents, $identifier_end) === false
  35         ) &&
  36         strpos($contents, $identifier_here) === false
  37     ) {
  38         display_error_and_quit(503, false,
  39             'Pre-existing htaccess not configured to accept new rules');
  40     }
  41
  42     // replace old rules with new set
  43     $regex =
  44         '/' .
  45             preg_quote($identifier_begin, '/') .
  46             '.+?' .
  47             preg_quote($identifier_end, '/') .
  48         '/s';
  49
  50     $contents = preg_replace($regex, $identifier_here, $contents);
  51
  52 } else {
  53     $contents = $identifier_here;
  54 }
  55
  56 // build the new htaccess
  57 $new_contents = array();
  58 $new_contents[] = $identifier_begin;
  59 $new_contents[] = 'RewriteEngine on';
  60
  61 $big_exp = array();
  62 foreach ($allowed_dirs as $dir => $recursive) {
  63     $r = '';
  64     if ($recursive) {
  65         $r = "([$filename_chars]+\/)*";
  66     }
  67     $dir_exp = $dir . $r;
  68     $new_contents[] = "RewriteRule ^($dir_exp)$ \$1$directory_index";
  69     $big_exp[] = $dir_exp;
  70 }
  71
  72 $full_dir_exp = implode('|', $big_exp);
  73 $new_contents[] = 'RewriteCond %{REQUEST_FILENAME} !-f [OR]';
  74 $new_contents[] = 'RewriteCond %{QUERY_STRING} purge=1';
  75 $new_contents[] = "RewriteRule ^(($full_dir_exp)[$filename_chars]+\.html)$ xhtml-compiler/main.php?f=\$1 [L,QSA]";
  76
  77 $new_contents[] = $identifier_end;
  78
  79 $contents = str_replace($identifier_here, implode($new_contents, PHP_EOL), $contents);
  80
  81 file_put_contents('.htaccess', $contents);
  82
  83 ?><h1>200: Okay</h1>New <tt>.htaccess</tt> file successfully written