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<?php
/*
** Copyright (C) 2001-2025 Zabbix SIA
**
** This program is free software: you can redistribute it and/or modify it under the terms of
** the GNU Affero General Public License as published by the Free Software Foundation, version 3.
**
** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU Affero General Public License for more details.
**
** You should have received a copy of the GNU Affero General Public License along with this program.
** If not, see <https://www.gnu.org/licenses/>.
**/
/**
* Access the HTTP Request
*/
class CHttpRequest {
/**
* additional HTTP headers not prefixed with HTTP_ in $_SERVER superglobal
*/
private $add_headers = ['CONTENT_TYPE', 'CONTENT_LENGTH', 'Authorization', 'PATH-INFO'];
private $body;
private $method;
private $protocol;
private $request_method;
private $headers;
private $raw;
/**
* Retrieve HTTP Body
* @param Array Additional Headers to retrieve
*/
public function __construct($add_headers = false) {
$this->retrieve_headers($add_headers);
$this->body = @file_get_contents('php://input');
}
/**
* Retrieve the HTTP request headers from the $_SERVER superglobal
* @param Array Additional Headers to retrieve
*/
public function retrieve_headers($add_headers = false) {
if ($add_headers) {
$this->add_headers = array_merge($this->add_headers, $add_headers);
}
if (isset($_SERVER['HTTP_METHOD'])) {
$this->method = $_SERVER['HTTP_METHOD'];
unset($_SERVER['HTTP_METHOD']);
}
else {
$this->method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : false;
}
$this->protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : false;
$this->request_method = isset($_SERVER['REQUEST_METHOD']) ? $_SERVER['REQUEST_METHOD'] : false;
$this->headers = [];
if (function_exists('getallheaders')) {
$headers = getallheaders();
if (array_key_exists('Authorization', $headers)) {
$this->headers['AUTHORIZATION'] = $headers['Authorization'];
}
}
foreach ($_SERVER as $i => $val) {
if (strpos($i, 'HTTP_') === 0 || in_array($i, $this->add_headers)) {
$name = str_replace(['HTTP_', '_'], ['', '-'], $i);
$this->headers[strtoupper($name)] = $val;
}
}
}
/**
* Retrieve HTTP Method
*/
public function method() {
return $this->method;
}
/**
* Retrieve HTTP Body
*/
public function body() {
return $this->body;
}
/**
* Retrieve an HTTP Header
* @param string Case-Insensitive HTTP Header Name (eg: "User-Agent")
*/
public function header($name) {
$name = strtoupper($name);
return isset($this->headers[$name]) ? $this->headers[$name] : false;
}
/**
* Retrieve all HTTP Headers
* @return array HTTP Headers
*/
public function headers() {
return $this->headers;
}
/**
* Get authentication header bearer value, return null when no authentication header exists or
* authentication method is not bearer type.
*
* @return string|null
*/
public function getAuthBearerValue() {
$auth = $this->header('AUTHORIZATION');
if (is_string($auth) && substr($auth, 0, 7) === ZBX_API_HEADER_AUTHENTICATE_PREFIX) {
return substr($auth, 7);
}
return null;
}
/**
* Get request PATH-INFO segment by index. Return empty string if non-existing index requested.
*
* @param int $index PATH-INFO segment index.
*
* @return string
*/
public function getPathInfoSegment(int $index): string {
$pathinfo_segments = explode('/', substr($this->header('PATH-INFO'), 1));
return array_key_exists($index, $pathinfo_segments) ? $pathinfo_segments[$index] : '';
}
/**
* Get argument passed in $_GET. Returns default value when argument not set.
*
* @param string $name Argument's name.
* @param mixed $default Default value to return when requested argument not set.
*
* @return mixed
*/
public function getUrlArgument(string $name, $default = null) {
return array_key_exists($name, $_GET) ? $_GET[$name] : $default;
}
/**
* Checks if argument exists in $_GET request.
*
* @param string $name Argument's name.
*
* @return bool
*/
public function hasUrlArgument(string $name): bool {
return array_key_exists($name, $_GET);
}
/**
* Return Raw HTTP Request (note: This is incomplete)
* @param bool ReBuild the Raw HTTP Request
*/
public function raw($refresh = false) {
if (isset($this->raw) && !$refresh) {
return $this->raw; // return cached
}
$headers = $this->headers();
$this->raw = $this->method."\r\n";
foreach ($headers as $i=>$header) {
$this->raw .= $i.': '.$header."\r\n";
}
$this->raw .= "\r\n".$this->body;
return $this->raw;
}
}
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