Mercurial > SimpleWebPresenter

annotate CacheTimeCheck.inc @ 41:2a3ff56697db

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Don't set values if they are empty in URL.
author Tom Fredrik "BFG" Klaussen <bfg@blenning.no>
date Fri, 05 Oct 2012 00:48:33 +0200
parents fbbb82ced6de
children 66382989353f
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d2da64705bce Refactored everything in the CMS into this repos.
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1 <?php
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2 class CacheTimeCheck
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3 {
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4 private $newest;
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5 private $files = array();
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6 private static $myInstance = 0;
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7
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8 private function __construct($filename = False)
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9 {
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10 if ($filename)
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11 $this->cache_time($filename);
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12 $this->cache_time(__FILE__);
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13 }
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15 function instance($filename = False)
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16 {
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17 if (! self::$myInstance)
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18 self::$myInstance = new self($filename);
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19 elseif ($filename)
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20 self::$myInstance->cache_time($filename);
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21 return self::$myInstance;
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22 }
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23
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24 function CheckHttpModified()
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25 {
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26 if (DEBUG_LEVEL >= VERBOSITY_DEBUG)
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27 var_dump($_SERVER);
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29 $gmdate_mod = gmdate('D, d M Y H:i:s', $this->newest) . ' GMT';
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31 if(array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER)) {
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32 $HTTP_IF_MODIFIED_SINCE = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
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33 $if_modified_since = preg_replace('/;.*$/', '', $HTTP_IF_MODIFIED_SINCE);
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35 if (strtotime($if_modified_since) >= $this->newest) {
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36 header("HTTP/1.0 304 Not Modified");
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37 exit;
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38 }
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39 }
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41 header("Last-Modified: $gmdate_mod");
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42 }
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44 function cache_time($path, $basedir = False)
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45 {
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46 if (!file_exists($path)) {
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47 if (DEBUG_LEVEL >= VERBOSITY_WARNING)
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48 print "${path} does not exist";
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49 var_dump($_SERVER);
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50 errorPage("Resource not available");
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51 }
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52
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53 array_push($this->files, $path);
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54 $mtime = filemtime($path);
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55 if ($mtime > $this->newest) {
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56 $this->newest = $mtime;
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57 }
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58 }
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60 function includeOnce($path, $basedir = false)
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61 {
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62 if ($basedir)
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63 $path = $basedir . "/" . $path;
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64 $this->cache_time($path);
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65 include_once($path);
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66 }
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68 function loadFile($path)
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69 {
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70 $this->cache_time($path);
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71 return loadFile($path);
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72 }
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73 }
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74 ?>