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 $xc = XHTMLCompiler::getInstance();
  10
  11 $identifier_begin = '# BEGIN xhtml-compiler/main.php mod_rewrite';
  12 $identifier_end   = '# END xhtml-compiler/main.php mod_rewrite';
  13 $identifier_here  = '# HERE xhtml-compiler/main.php mod_rewrite';
  14
  15 if (file_exists('.htaccess')) {
  16
  17     // do time check
  18     $mtime_htaccess = filemtime('.htaccess');
  19     $mtime_config   = filemtime('xhtml-compiler/config.php');
  20     $mtime_dconfig  = filemtime('xhtml-compiler/config.default.php');
  21     $mtime_sconfig  = filemtime('xhtml-compiler/config.smoketest.php');
  22     $mtime_gen      = filemtime('xhtml-compiler/htaccess.php');
  23     if ($mtime_htaccess > $mtime_config &&
  24         $mtime_htaccess > $mtime_gen &&
  25         $mtime_htaccess > $mtime_dconfig &&
  26         $mtime_htaccess > $mtime_sconfig
  27     ) {
  28         throw new XHTMLCompiler_Exception(503, false,
  29             'No changes detected in <tt>xhtml-compiler/config.php</tt>,
  30             <tt>xhtml-compiler/config.default.php</tt> or
  31             <tt>xhtml-compiler/htaccess.php</tt>.');
  32     }
  33
  34     $contents = file_get_contents('.htaccess');
  35
  36     // do writeability check
  37     if (
  38         (
  39             strpos($contents, $identifier_begin) === false ||
  40             strpos($contents, $identifier_end) === false
  41         ) &&
  42         strpos($contents, $identifier_here) === false
  43     ) {
  44         throw new XHTMLCompiler_Exception(503, false,
  45             'Pre-existing htaccess not configured to accept new rules');
  46     }
  47
  48     // replace old rules with new set
  49     $regex =
  50         '/' .
  51             preg_quote($identifier_begin, '/') .
  52             '.+?' .
  53             preg_quote($identifier_end, '/') .
  54         '/s';
  55
  56     $contents = preg_replace($regex, $identifier_here, $contents);
  57
  58 } else {
  59     $contents = $identifier_here;
  60 }
  61
  62 // build the new htaccess
  63 $new_contents = array();
  64 $new_contents[] = $identifier_begin;
  65 $new_contents[] = 'RewriteEngine on';
  66
  67 $big_exp = array();
  68 $directory_index = $xc->getConf('directory_index');
  69 $indexed_dirs = $xc->getConf('indexed_dirs');
  70 $allowed_dirs = $xc->getConf('allowed_dirs');
  71 foreach ($allowed_dirs as $dir => $recursive) {
  72     $r = '';
  73     if ($recursive) {
  74         $r = "([^/]+/)*"; // escaped slashes not necessary
  75     }
  76     $len = strlen($dir);
  77     $slash = (!$len || $dir[$len-1] === '/') ? '' : '/';
  78     $dir_exp = preg_quote($dir) . $slash . $r;
  79
  80     if (is_array($indexed_dirs)) {
  81         $intercept = isset($indexed_dirs[$dir]) ? $indexed_dirs[$dir] : true;
  82     } else {
  83         $intercept = $indexed_dirs;
  84     }
  85     if (is_string($directory_index) && $intercept) {
  86         // setup index rewrite
  87         $new_contents[] = "RewriteRule ^($dir_exp)$ \$1$directory_index";
  88     }
  89     $big_exp[] = $dir_exp;
  90 }
  91
  92 $full_dir_exp = implode('|', $big_exp);
  93 $new_contents[] = 'RewriteCond %{REQUEST_FILENAME} !-f [OR]';
  94 $new_contents[] = 'RewriteCond %{QUERY_STRING} purge=1 [OR]';
  95 $new_contents[] = 'RewriteCond %{HTTP_COOKIE} purgatory=1';
  96 $new_contents[] = "RewriteRule ^(($full_dir_exp)[^/]+\.html)$ xhtml-compiler/main.php?f=\$1 [L,QSA]";
  97
  98 // if purge is set, also handle directories
  99 $new_contents[] = 'RewriteCond %{QUERY_STRING} purge=1';
 100 $new_contents[] = "RewriteRule ^($full_dir_exp)$ xhtml-compiler/main.php?f=\$1 [L,QSA]";
 101
 102 // xc-deps are forbidden to outside world
 103 $new_contents[] = '<Files ~ "\.xc-deps$">';
 104 $new_contents[] = '  Order allow,deny';
 105 $new_contents[] = '  Deny from all';
 106 $new_contents[] = '</Files>';
 107
 108 // setup RSS
 109 $new_contents[] = 'AddType application/rss+xml rss';
 110 $new_contents[] = 'AddCharset UTF-8 .rss';
 111 $new_contents[] = '<IfModule mod_headers.c>';
 112 $new_contents[] = '  <Files ~ "\.rss$">';
 113 $new_contents[] = '    Header append Cache-Control "no-cache, must-revalidate"';
 114 $new_contents[] = '  </Files>';
 115 $new_contents[] = '</IfModule>';
 116
 117 // set UTF-8 for HTML pages
 118 $new_contents[] = 'AddCharset UTF-8 .html';
 119
 120 $new_contents[] = $identifier_end;
 121
 122 $contents = str_replace($identifier_here, implode($new_contents, PHP_EOL), $contents);
 123
 124 file_put_contents('.htaccess', $contents);
 125 chmod('.htaccess', 0644);
 126
 127 ?><h1>200: Okay</h1>New <tt>.htaccess</tt> file successfully written