function messages()
{
static $messages = false;
if ($messages !== false) {
return $messages;
} else {
if (session_started()) {
if (!isset($_SESSION['messages'])) {
$_SESSION['messages'] = new MESSAGES();
}
$messages = $_SESSION['messages'];
} else {
$messages = new MESSAGES();
}
return $messages;
}
}
/**
* render_static
*
* filter to intercept calls to static views
*
* @author Brian Hendrickson <*****@*****.**>
* @access public
* @param object $req
* @param object $route
*/
function render_static(&$req, &$route)
{
trigger_before('render_static', $req, $route);
if (!session_started()) {
session_start();
}
ob_start();
/*
* List of known content types based on file extension.
* Note: These must be built-in somewhere...
*/
$known_content_types = array("htm" => "text/html", "html" => "text/html", "js" => "text/javascript", "css" => "text/css", "xml" => "text/xml", "gif" => "image/gif", "jpg" => "image/jpeg", "jpeg" => "image/jpeg", "png" => "image/png", "txt" => "text/plain");
/*
* Get the path of the target file.
*/
if (in_array('static', $req->params, true)) {
$resource = "";
$slash = "";
for ($i = 4; $i < count($req->params); $i++) {
$resource .= $slash . $req->params[$i];
$slash = "/";
}
/*
* Verify the existence of the target file.
* Return HTTP 404 if needed.
*/
if (($src_uri = realpath($resource)) === false) {
/* The file does not exist */
header("HTTP/1.1 404 Not Found");
echo "<html><body><h1>HTTP 404 - Not Found</h1></body></html>";
exit;
}
/*
* Verify the requested file is under the doc root for security reasons.
*/
$doc_root = realpath(".");
if (strpos($src_uri, $doc_root) !== 0) {
header("HTTP/1.1 403 Forbidden");
echo "<html><body><h1>HTTP 403 - Forbidden</h1></body></html>";
exit;
}
/*
* Set the HTTP response headers that will
* tell the client to cache the resource.
*/
$file_last_modified = filemtime($src_uri);
header("Last-Modified: " . date("r", $file_last_modified));
$max_age = 300 * 24 * 60 * 60;
// 300 days
$expires = $file_last_modified + $max_age;
header("Expires: " . date("r", $expires));
$etag = dechex($file_last_modified);
header("ETag: " . $etag);
$cache_control = "must-revalidate, proxy-revalidate, max-age=" . $max_age . ", s-maxage=" . $max_age;
header("Cache-Control: " . $cache_control);
/*
* Check if the client should use the cached version.
* Return HTTP 304 if needed.
*/
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $file_last_modified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
//error_log('using cached static file');
header("HTTP/1.1 304 Not Modified");
exit;
}
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) === $etag) {
//error_log('using cached static file');
header("HTTP/1.1 304 Not Modified");
exit;
}
/*
* Extract the directory, file name and file
* extension from the "uri" parameter.
*/
$uri_dir = "";
$file_name = "";
$content_type = "";
$uri_parts = explode("/", $src_uri);
for ($i = 0; $i < count($uri_parts) - 1; $i++) {
$uri_dir .= $uri_parts[$i] . "/";
}
$file_name = end($uri_parts);
$file_parts = explode(".", $file_name);
if (count($file_parts) > 1) {
$file_extension = end($file_parts);
$content_type = $known_content_types[$file_extension];
}
/*
* Get the target file.
* If the browser accepts gzip encoding, the target file
* will be the gzipped version of the requested file.
*/
$dst_uri = $src_uri;
$compress = true;
/*
* Let's compress only text files...
*/
$compress = $compress && strpos($content_type, "text") !== false;
/*
* Finally, see if the client sent us the correct Accept-encoding: header value...
*/
$compress = $compress && strpos($_SERVER["HTTP_ACCEPT_ENCODING"], "gzip") !== false;
if ($compress) {
$gz_uri = "tmp/gzip/" . $src_uri . ".gz";
if (file_exists($gz_uri)) {
$src_last_modified = filemtime($src_uri);
$dst_last_modified = filemtime($gz_uri);
// The gzip version of the file exists, but it is older
// than the source file. We need to recreate it...
if ($src_last_modified > $dst_last_modified) {
unlink($gz_uri);
}
}
if (!file_exists($gz_uri)) {
if (!file_exists("tmp/gzip/" . $uri_dir)) {
mkdir_r("tmp/gzip/" . $uri_dir);
}
$error = false;
if ($fp_out = gzopen($gz_uri, "wb")) {
if ($fp_in = fopen($src_uri, "rb")) {
while (!feof($fp_in)) {
gzwrite($fp_out, fread($fp_in, 1024 * 512));
}
fclose($fp_in);
} else {
$error = true;
}
gzclose($fp_out);
} else {
$error = true;
}
if (!$error) {
$dst_uri = $gz_uri;
header("Content-Encoding: gzip");
}
} else {
$dst_uri = $gz_uri;
header("Content-Encoding: gzip");
}
}
/*
* Output the target file and set the appropriate HTTP headers.
*/
if ($content_type) {
header("Content-Type: " . $content_type);
}
header("Content-Length: " . filesize($dst_uri));
readfile($dst_uri);
ob_end_flush();
}
trigger_after('render_static', $req, $route);
}
function user($name = false)
{
if ($name !== false && session_started()) {
try {
$_SESSION['user'] = USER::byName($name);
} catch (Exception $e) {
return new USER();
}
}
if (isset($_SESSION['user'])) {
return $_SESSION['user'];
} else {
return new USER();
}
}
function sessions_init()
{
if (!session_started()) {
session_start();
}
}
