function __construct()
{
global $settings;
$param = $this->processParams($_GET['param'], $settings['image']);
$meta = $cache_file = NULL;
$image_path = $param->external === true ? "http://{$param->file}" : WORKSPACE . "/{$param->file}";
Utils::log($image_path, "IMAGE PATH");
// If the image is not external check to see when the image was last modified
if ($param->external !== true) {
$last_modified = is_file($image_path) ? filemtime($image_path) : null;
Utils::log($last_modified, "last_modified");
} else {
$rules = file(WORKSPACE . '/jit-image-manipulation/trusted-sites', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
$allowed = false;
$rules = array_map('trim', $rules);
if (count($rules) > 0) {
foreach ($rules as $rule) {
$rule = str_replace(array('http://', 'https://'), NULL, $rule);
// Wildcard
if ($rule == '*') {
$allowed = true;
break;
} else {
if (substr($rule, -1) == '*' && strncasecmp($param->file, $rule, strlen($rule) - 1) == 0) {
$allowed = true;
break;
} else {
if (strncasecmp($rule, $param->file, strlen($rule)) == 0) {
$allowed = true;
break;
} else {
if (substr($rule, 0, 1) == '*' && preg_match("/(" . substr(substr($rule, -1) == '*' ? rtrim($rule, "/*") : $rule, 2) . ")/", $param->file)) {
$allowed = true;
break;
}
}
}
}
}
}
if ($allowed == false) {
Page::renderStatusCode(Page::HTTP_STATUS_FORBIDDEN);
exit(sprintf('Error: Connecting to %s is not permitted.', $param->file));
}
$last_modified = strtotime(Image::getHttpHeaderFieldValue($image_path, 'Last-Modified'));
}
// if there is no `$last_modified` value, params should be NULL and headers
// should not be set. Otherwise, set caching headers for the browser.
if ($last_modified) {
$last_modified_gmt = gmdate('D, d M Y H:i:s', $last_modified) . ' GMT';
$etag = md5($last_modified . $image_path);
Utils::log($last_modified_gmt, "last_modified_gmt");
header('Last-Modified: ' . $last_modified_gmt);
header(sprintf('ETag: "%s"', $etag));
header('Cache-Control: public');
} else {
$last_modified_gmt = NULL;
$etag = NULL;
}
// Check to see if the requested image needs to be generated or if a 304
// can just be returned to the browser to use it's cached version.
if (CACHING === true && (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) || isset($_SERVER['HTTP_IF_NONE_MATCH']))) {
if ($_SERVER['HTTP_IF_MODIFIED_SINCE'] == $last_modified_gmt || str_replace('"', NULL, stripslashes($_SERVER['HTTP_IF_NONE_MATCH'])) == $etag) {
Page::renderStatusCode(Page::HTTP_NOT_MODIFIED);
Utils::log("Returning 304 code");
exit;
}
}
// The 'image_path' may change and point to a cache file, but we will
// still need to know which file is supposed to be processed.
$original_file = $image_path;
// If CACHING is enabled, check to see that the cached file is still valid.
if (CACHING === true) {
$cache_file = sprintf('%s/%s_%s', CACHE, md5($_REQUEST['param'] . intval($settings['image']['quality']) . filemtime($image_path)), basename($image_path));
Utils::log($cache_file, "CACHE FILE NAME");
// Cache has expired or doesn't exist
/* if (is_file($cache_file) && (filemtime($cache_file) < $last_modified)) {
unlink($cache_file);
} else if (is_file($cache_file)) {
$image_path = $cache_file;
touch($cache_file);
$param->mode = MODE_NONE;
} */
if (is_file($cache_file)) {
Utils::log($cache_file, "Reading cache file");
$image_path = $cache_file;
$param->mode = MODE_NONE;
}
}
$this->param = $param;
$this->image_path = $image_path;
$this->last_modified = $last_modified;
$this->cache_file = $cache_file;
$this->settings = $settings;
//Utils::log($this);
}
