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<?php
/*
*
* This file contains functions to be used to
* extract information based on http request information.
*
*/
/**
* Inspired by https://github.com/owncloud/core/blob/master/lib/private/appframework/http/request.php#L523
*/
function getServerProtocol() {
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
if (strpos($_SERVER['HTTP_X_FORWARDED_PROTO'], ',') !== false) {
$parts = explode(',', $_SERVER['HTTP_X_FORWARDED_PROTO']);
$proto = strtolower(trim($parts[0]));
} else {
$proto = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']);
}
// Verify that the protocol is always HTTP or HTTPS
// default to http if an invalid value is provided
return $proto === 'https' ? 'https' : 'http';
}
if (isset($_SERVER['HTTPS'])
&& $_SERVER['HTTPS'] !== null
&& $_SERVER['HTTPS'] !== 'off'
&& $_SERVER['HTTPS'] !== '') {
return 'https';
}
return 'http';
}
function getRequestHostname() {
if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
return strtolower($_SERVER['HTTP_X_FORWARDED_HOST']);
}
return strtolower($_SERVER['HTTP_HOST']);
}
function getRequestUriWithoutFilename() {
return strtolower(substr($_SERVER['REQUEST_URI'], 0, strrpos($_SERVER['REQUEST_URI'], '/') + 1));
}
function sendHttpReturnCodeAndJson($code, $data) {
if (!is_array($data)) {
$data = ['msg' => $data];
}
header('Content-Type: application/json');
sendHttpReturnCodeAndMessage($code, json_encode($data));
}
function sendHttpReturnCodeAndMessage($code, $text = '') {
http_response_code($code);
exit($text);
}
function getOptionalPostParameter($parameterName, $default = NULL) {
$parameter = $_POST[$parameterName];
if (!isset($parameter) || is_null($parameter) || empty($parameter)) {
$parameter = $default;
}
return $parameter;
}
function getMandatoryPostParameter($parameterName, $message = '', $json = false) {
$parameter = $_POST[$parameterName];
if (!isset($parameter) || is_null($parameter) || empty($parameter)) {
if (empty($message)) {
if ($json) {
$message = ['msg' => 'Missing parameter.', 'parameters' => ['missing_parameter' => $parameterName]];
} else {
$message = 'Missing mandatory parameter "'.$parameterName.'".';
}
}
if (!$json) {
sendHttpReturnCodeAndMessage(400, $message);
} else {
sendHttpReturnCodeAndJson(400, $message);
}
}
return $parameter;
}
?>
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