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   1  <?php
   2  /* Reminder: always indent with 4 spaces (no tabs). */
   3  // +---------------------------------------------------------------------------+
   4  // | Copyright (c) 2006, Demian Turner                                         |
   5  // | All rights reserved.                                                      |
   6  // |                                                                           |
   7  // | Redistribution and use in source and binary forms, with or without        |
   8  // | modification, are permitted provided that the following conditions        |
   9  // | are met:                                                                  |
  10  // |                                                                           |
  11  // | o Redistributions of source code must retain the above copyright          |
  12  // |   notice, this list of conditions and the following disclaimer.           |
  13  // | o Redistributions in binary form must reproduce the above copyright       |
  14  // |   notice, this list of conditions and the following disclaimer in the     |
  15  // |   documentation and/or other materials provided with the distribution.    |
  16  // | o The names of the authors may not be used to endorse or promote          |
  17  // |   products derived from this software without specific prior written      |
  18  // |   permission.                                                             |
  19  // |                                                                           |
  20  // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       |
  21  // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT         |
  22  // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR     |
  23  // | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT      |
  24  // | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,     |
  25  // | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT          |
  26  // | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,     |
  27  // | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY     |
  28  // | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT       |
  29  // | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE     |
  30  // | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.      |
  31  // |                                                                           |
  32  // +---------------------------------------------------------------------------+
  33  // | Seagull 0.6                                                               |
  34  // +---------------------------------------------------------------------------+
  35  // | style.php                                                                 |
  36  // +---------------------------------------------------------------------------+
  37  // | Author:   John Dell <jdell@unr.edu>                                       |
  38  // +---------------------------------------------------------------------------+
  39  // $Id: style.php,v 1.85 2005/06/22 00:40:44 demian Exp $
  40  
  41      // PHP Stylesheet caching headers.
  42      // Adapted from PEAR HTTP_Header_Cache authored by Wolfram Kriesing <wk@visionp.de>
  43      // Adapted by John Dell
  44  
  45      ////////////////////////////   DO NOT MODIFY   /////////////////////////////
  46  
  47      require_once  '../../helpers.php';
  48  
  49      // send default cacheing headers and content type
  50      header('Pragma: cache');
  51      header('Cache-Control: public');
  52      header('Content-Type: text/css');
  53  
  54      $modTimes = array();
  55  
  56      if (is_file($tmp = './vars.php')) {
  57          $modTimes['vars'] = filemtime($tmp);
  58      }
  59      if (is_file($tmp = './core.php')) {
  60          $modTimes['core'] = filemtime($tmp);
  61      }
  62      if (is_file($tmp = './blockStyle.php')) {
  63          $modTimes['blockStyle'] = filemtime($tmp);
  64      }
  65      $frmNavStyleSheet = @$_REQUEST['navStylesheet'];
  66      if (is_file($navStyleSheet = realpath("./$frmNavStyleSheet.nav.php"))) {
  67          $modTimes['navigation'] = filemtime($navStyleSheet);
  68      }
  69      $frmModuleName = @$_REQUEST['moduleName'];
  70      $frmIsSymlink  = @$_REQUEST['isSymlink'];
  71  
  72      if ($frmIsSymlink) {
  73          if (is_file($moduleName = realpath("../../../$frmModuleName/css/$frmModuleName.php"))) {
  74              $modTimes['module'] = filemtime($moduleName);
  75          }
  76      } else {
  77          if (is_file($moduleName = realpath("./$frmModuleName.php"))) {
  78              $modTimes['module'] = filemtime($moduleName);
  79          }
  80      }
  81  
  82      // Get last modified time of file
  83      $modTimes['shared'] = getlastmod();
  84  
  85      // exit out of script if cached on client
  86      if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
  87          $cliModTime = dateToTimestamp($_SERVER['HTTP_IF_MODIFIED_SINCE']);
  88          if (max($modTimes) <= $cliModTime) {
  89              header('HTTP/1.x 304 Not Modified');
  90              exit;
  91          }
  92      }
  93  
  94      /* send last modified date of file to client so it will have date for server
  95       * on next request.
  96       * Technically we could just send the current time (as PEAR does) rather
  97       * than the actual modify time of the file since either way would get the
  98       * correct behavior, but since we already have the actual modified time of
  99       * the file, we'll just use that.
 100       */
 101      $srvModDate = timestampToDate(max($modTimes));
 102      header("Last-Modified: $srvModDate");
 103  
 104      //  get form context (submitted or not)
 105      $isFormSubmitted = (isset($_REQUEST['isFormSubmitted']) && $_REQUEST['isFormSubmitted'] == "1")
 106          ? true
 107          : false;
 108  
 109      //  get base url for css classes that include images
 110      $path = dirname($_SERVER['PHP_SELF']);
 111      $aPath = explode('/', $path);
 112      $aPath = array_filter($aPath);
 113      array_pop($aPath);
 114      $baseUrl = join('/', $aPath);
 115      $protocol = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']  == 'on')
 116          ? 'https' : 'http';
 117      $baseUrl = $protocol . '://' . $_SERVER['HTTP_HOST'] . '/' . $baseUrl;
 118  
 119      require_once  './vars.php';
 120      require_once  './core.php';
 121      require_once  './blockStyle.php';
 122      if (isset($modTimes['navigation'])) {
 123          require_once realpath("./$frmNavStyleSheet.nav.php");
 124      }
 125      if (isset($modTimes['module'])) {
 126          if ($frmIsSymlink) {
 127              require_once realpath("../../../$frmModuleName/css/$frmModuleName.php");
 128          } else {
 129              require_once realpath("./$frmModuleName.php");
 130          }
 131      }
 132  
 133      // copied from PEAR HTTP Header.php (comments stripped)
 134      // Author: Wolfram Kriesing <wk@visionp.de>
 135      // Changes: mktime() to gmmktime() to make work in timezones other than GMT
 136      function dateToTimestamp($date)
 137      {
 138          $months = array_flip(array('Jan','Feb','Mar','Apr','May','Jun',
 139              'Jul','Aug','Sep','Oct','Nov','Dec'));
 140          preg_match('~[^,]*,\s(\d+)\s(\w+)\s(\d+)\s(\d+):(\d+):(\d+).*~', $date,
 141              $splitDate);
 142          $timestamp = @gmmktime($splitDate[4], $splitDate[5], $splitDate[6],
 143              $months[$splitDate[2]]+1, $splitDate[1], $splitDate[3]);
 144          return $timestamp;
 145      }
 146  
 147      // copied from PEAR HTTP.php Date function (comments stripped)
 148      // Author: Stig Bakken <ssb@fast.no>
 149      function timestampToDate($time)
 150      {
 151          if (ini_get("y2k_compliance") == true) {
 152              return gmdate("D, d M Y H:i:s \G\M\T", $time);
 153          } else {
 154              return gmdate("F, d-D-y H:i:s \G\M\T", $time);
 155          }
 156      }
 157  ?>