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<?php
/*
*
* This file contains functions to be used to
* extract information based on http request information.
*
*/
require_once('functions.common.inc.php');
/**
* Inspired by https://github.com/owncloud/core/blob/master/lib/private/appframework/http/request.php#L523
*/
function getServerProtocol() {
$protocol = getHeaderExtensionValue('FORWARDED_PROTO');
if (isset($protocol)) {
if (strpos($protocol, ',') !== false) {
$parts = explode(',', $protocol);
$proto = strtolower(trim($parts[0]));
} else {
$proto = strtolower($protocol);
}
// 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() {
$forwardedHost = getHeaderExtensionValue('FORWARDED_HOST');
if (isset($forwardedHost)) {
return strtolower($forwardedHost);
}
return strtolower(getHeaderValue('HOST'));
}
function getRequestUriWithoutFilename() {
return strtolower(substr($_SERVER['REQUEST_URI'], 0, strrpos($_SERVER['REQUEST_URI'], '/') + 1));
}
function sendHttpReturnCodeAndJson($code, $data) {
if (!is_array($data)) {
$data = ['msg' => $data];
}
setContentType('application/json');
sendHttpReturnCodeAndMessage($code, json_encode($data));
}
function sendHttpReturnCodeAndMessage($code, $text = '') {
http_response_code($code);
exit($text);
}
function setContentType($contentType) {
header('Content-Type: '.$contentType);
}
function getHeaderExtensionValue($headerName) {
$headerName = strtoupper($headerName);
if (!startsWith('HTTP_X_')) {
if (!startsWith('HTTP_')) {
$headerName = str_replace('HTTP_', 'HTTP_X_', $headerName);
} else {
$headerName = 'HTTP_X_'.$headerName;
}
}
return getHeaderValue($headerName);
}
function getHeaderValue($headerName) {
$headerName = strtoupper($headerName);
if (!startsWith('HTTP_')) {
$headerName = 'HTTP_'.$headerName;
}
return $_SERVER[$headerName];
}
function getFileParameter($parameterName) {
return $_FILES[$parameterName];
}
function getOptionalFileParameter($parameterName, $default = NULL) {
$parameter = getFileParameter($parameterName);
return handleOptionalParameter($parameter, $default);
}
function getMandatoryFileParameter($parameterName, $message = '', $json = false) {
$parameter = getFileParameter($parameterName);
return handleMandatoryParameter($parameterName, $parameter, $message, $json);
}
function getPostParameter($parameterName) {
return $_POST[$parameterName];
}
function getOptionalPostParameter($parameterName, $default = NULL) {
$parameter = getPostParameter($parameterName);
return handleOptionalParameter($parameter, $default);
}
function getMandatoryPostParameter($parameterName, $message = '', $json = false) {
$parameter = getPostParameter($parameterName);
return handleMandatoryParameter($parameterName, $parameter, $message, $json);
}
function getGetParameter($parameterName) {
return $_GET[$parameterName];
}
function getOptionalGetParameter($parameterName, $default = NULL) {
$parameter = getPostParameter($parameterName);
return handleOptionalParameter($parameter, $default);
}
function getMandatoryGetParameter($parameterName, $message = '', $json = false) {
$parameter = getGetParameter($parameterName);
return handleMandatoryParameter($parameterName, $parameter, $message, $json);
}
function handleOptionalParameter($parameter, $default) {
if (!isset($parameter) || is_null($parameter) || empty($parameter)) {
$parameter = $default;
}
return $parameter;
}
function handleMandatoryParameter($parameterName, $parameter, $message, $json) {
if (!isset($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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