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<?php |
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/** |
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* Fast track cache, read entries from the cache before processing image |
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* the ordinary way. |
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*/ |
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// Load the config file or use defaults |
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$configFile = __DIR__ |
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. "/" |
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. basename(__FILE__, ".php") |
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. "_config.php"; |
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if (is_file($configFile) && is_readable($configFile)) { |
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$config = require $configFile; |
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} elseif (!isset($config)) { |
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$config = array( |
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"cache_path" => __DIR__ . "/../cache/", |
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); |
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} |
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// Prepare to check if fast cache should be used |
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$cachePath = $config["cache_path"] . "/fasttrack"; |
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$query = $_GET; |
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// Do not use cache when no-cache is active |
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$useCache = !(array_key_exists("no-cache", $query) || array_key_exists("nc", $query)); |
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// Remove parts from querystring that should not be part of filename |
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$clear = array("nc", "no-cache"); |
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foreach ($clear as $value) { |
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unset($query[$value]); |
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} |
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// Create the cache filename |
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arsort($query); |
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$queryAsString = http_build_query($query); |
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$filename = md5($queryAsString); |
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$filename = "$cachePath/$filename"; |
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// Check cached item, if any |
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if ($useCache && is_readable($filename)) { |
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$item = json_decode(file_get_contents($filename), true); |
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if (is_readable($item["source"])) { |
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foreach ($item["header"] as $value) { |
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header($value); |
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} |
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if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"]) |
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&& strtotime($_SERVER["HTTP_IF_MODIFIED_SINCE"]) == $item["last-modified"]) { |
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header("HTTP/1.0 304 Not Modified"); |
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exit; |
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} |
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foreach ($item["header-output"] as $value) { |
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header($value); |
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} |
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readfile($item["source"]); |
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exit; |
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} |
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} |
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// No fast track cache, proceed as usual |
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include __DIR__ . "/img.php"; |
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mosbth /
cimage
