+ /**
+ * @brief Called from db initialisation when db is dead.
+ */
+ static public function unavailable() {
+echo <<< EOT
+<html>
+ <head><title>System Unavailable</title></head>
+ <body>Apologies but this site is unavailable at the moment. Please try again later.</body>
+</html>
+EOT;
+
+ killme();
+ }
+
+ /**
+ * Generic XML return
+ * Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
+ * of $st and an optional text <message> of $message and terminates the current process.
+ */
+ public static function xmlExit($st, $message = '')
+ {
+ $result = ['status' => $st];
+
+ if ($message != '') {
+ $result['message'] = $message;
+ }
+
+ if ($st) {
+ logger('xml_status returning non_zero: ' . $st . " message=" . $message);
+ }
+
+ header("Content-type: text/xml");
+
+ $xmldata = ["result" => $result];
+
+ echo XML::fromArray($xmldata, $xml);
+
+ killme();
+ }
+
+ /**
+ * @brief Send HTTP status header and exit.
+ *
+ * @param integer $val HTTP status result value
+ * @param array $description optional message
+ * 'title' => header title
+ * 'description' => optional message
+ */
+ public static function httpExit($val, $description = [])
+ {
+ $err = '';
+ if ($val >= 400) {
+ $err = 'Error';
+ if (!isset($description["title"])) {
+ $description["title"] = $err." ".$val;
+ }
+ }
+
+ if ($val >= 200 && $val < 300) {
+ $err = 'OK';
+ }
+
+ logger('http_status_exit ' . $val);
+ header($_SERVER["SERVER_PROTOCOL"] . ' ' . $val . ' ' . $err);
+
+ if (isset($description["title"])) {
+ $tpl = get_markup_template('http_status.tpl');
+ echo replace_macros(
+ $tpl,
+ [
+ '$title' => $description["title"],
+ '$description' => $description["description"]]
+ );
+ }
+
+ killme();
+ }
+
+ /**
+ * @brief Encodes content to json
+ *
+ * This function encodes an array to json format
+ * and adds an application/json HTTP header to the output.
+ * After finishing the process is getting killed.
+ *
+ * @param array $x The input content
+ */
+ public static function jsonExit($x)
+ {
+ header("content-type: application/json");
+ echo json_encode($x);
+ killme();
+ }
+