Initial commit.v1.0

1 files changed, 234 insertions, 0 deletions

diff --git a/core/namespace/HTTP.php b/core/namespace/HTTP.php
new file mode 100644
index 0000000..f9fbf01
--- /dev/null
+++ b/core/namespace/HTTP.php
@@ -0,0 +1,234 @@
+<?php
+class HTTP {
+	private static $GET  = NULL;
+	private static $POST = NULL;
+	private static $FILE = NULL;
+
+	#===============================================================================
+	# HTTP protocol versions
+	#===============================================================================
+	const VERSION_1_0 = 'HTTP/1.0';
+	const VERSION_1_1 = 'HTTP/1.1';
+	const VERSION_2_0 = 'HTTP/2.0';
+
+	#===============================================================================
+	# HTTP header fields
+	#===============================================================================
+	const HEADER_ETAG              = 'ETag';
+	const HEADER_CONTENT_TYPE      = 'Content-Type';
+	const HEADER_TRANSFER_ENCODING = 'Transfer-Encoding';
+	const HEADER_ACCESS_CONTROL    = 'Access-Control-Allow-Origin';
+
+	#===============================================================================
+	# Values for HTTP header fields
+	#===============================================================================
+	const CONTENT_TYPE_JSCRIPT = 'application/x-javascript; charset=UTF-8';
+	const CONTENT_TYPE_TEXT    = 'text/plain; charset=UTF-8';
+	const CONTENT_TYPE_HTML    = 'text/html; charset=UTF-8';
+	const CONTENT_TYPE_JSON    = 'application/json; charset=UTF-8';
+	const CONTENT_TYPE_XML     = 'text/xml; charset=UTF-8';
+
+	#===============================================================================
+	# HTTP status codes
+	#===============================================================================
+	const RESPONSE_CODE = [
+		100 => 'Continue',
+		101 => 'Switching Protocols',
+		200 => 'OK',
+		201 => 'Created',
+		202 => 'Accepted',
+		203 => 'Non-Authoritative Information',
+		204 => 'No Content',
+		205 => 'Reset Content',
+		206 => 'Partial Content',
+		300 => 'Multiple Choices',
+		301 => 'Moved Permanently',
+		302 => 'Found',
+		303 => 'See Other',
+		304 => 'Not Modified',
+		305 => 'Use Proxy',
+		307 => 'Temporary Redirect',
+		400 => 'Bad Request',
+		401 => 'Unauthorized',
+		402 => 'Payment Required',
+		403 => 'Forbidden',
+		404 => 'Not Found',
+		405 => 'Method Not Allowed',
+		406 => 'Not Acceptable',
+		407 => 'Proxy Authentication Required',
+		408 => 'Request Time-out',
+		409 => 'Conflict',
+		410 => 'Gone',
+		411 => 'Length Required',
+		412 => 'Precondition Failed',
+		413 => 'Request Entity Too Large',
+		414 => 'Request-URI Too Large',
+		415 => 'Unsupported Media Type',
+		416 => 'Requested range not satisfiable',
+		417 => 'Expectation Failed',
+		500 => 'Internal Server Error',
+		501 => 'Not Implemented',
+		502 => 'Bad Gateway',
+		503 => 'Service Unavailable',
+		504 => 'Gateway Time-out'
+	];
+
+	#===============================================================================
+	# Initialize $GET, $POST and $FILE
+	#===============================================================================
+	public static function init($GET, $POST, $FILE, $removeArrays = FALSE, $trimValues = TRUE) {
+		self::$GET  = $GET;
+		self::$POST = $POST;
+		self::$FILE = $FILE;
+
+		$removeArrays AND self::removeArrays();
+
+		self::$GET  = ($trimValues === TRUE ? self::trim(self::$GET)  : self::$GET );
+		self::$POST = ($trimValues === TRUE ? self::trim(self::$POST) : self::$POST);
+	}
+
+	#===============================================================================
+	# Remove all arrays from $_GET and $_POST
+	#===============================================================================
+	private static function removeArrays() {
+		foreach(['GET', 'POST'] as $HTTP) {
+			foreach(self::$$HTTP as $name => $value) {
+				if(is_array(self::$$HTTP[$name])) {
+					unset(self::$$HTTP[$name]);
+				}
+			}
+		}
+	}
+
+	#===============================================================================
+	# Trim all strings in argument
+	#===============================================================================
+	private static function trim($mixed) {
+		if(is_array($mixed)) {
+			return array_map('self::trim', $mixed);
+		}
+
+		return trim($mixed);
+	}
+
+	#===============================================================================
+	# Checks if all elements of $arguments are set as key of $data
+	#===============================================================================
+	private static function issetData($data, $arguments) {
+		foreach($arguments as $key) {
+			if(is_array($key)) {
+				if(!isset($data[key($key)]) OR $data[key($key)] !== $key[key($key)]) {
+					return FALSE;
+				}
+			}
+
+			else if(!isset($data[$key]) OR !is_string($data[$key])) {
+				return FALSE;
+			}
+		}
+
+		return TRUE;
+	}
+
+	#===============================================================================
+	# Return null or the value (if set) from one of the three requests attributes
+	#===============================================================================
+	public static function returnKey($data, array $paths) {
+		$current = &$data;
+
+		foreach($paths as $path) {
+			if(!isset($current[$path])) {
+				return NULL;
+			}
+			$current = &$current[$path];
+		}
+
+		return $current;
+	}
+
+	#===============================================================================
+	# Return GET value
+	#===============================================================================
+	public static function GET() {
+		return self::returnKey(self::$GET, func_get_args());
+	}
+
+	#===============================================================================
+	# Return POST value
+	#===============================================================================
+	public static function POST() {
+		return self::returnKey(self::$POST, func_get_args());
+	}
+
+	#===============================================================================
+	# Return FILE value
+	#===============================================================================
+	public static function FILE() {
+		return self::returnKey(self::$FILE, func_get_args());
+	}
+
+	#===============================================================================
+	# Checks if all elements of func_get_args() are set key of self::$POST
+	#===============================================================================
+	public static function issetPOST() {
+		return self::issetData(self::$POST, func_get_args());
+	}
+
+	#===============================================================================
+	# Checks if all elements of func_get_args() are set key of self::$GET
+	#===============================================================================
+	public static function issetGET() {
+		return self::issetData(self::$GET, func_get_args());
+	}
+
+	#===============================================================================
+	# Checks if all elements of func_get_args() are set key of self::$FILE
+	#===============================================================================
+	public static function issetFILE() {
+		return self::issetData(self::$FILE, func_get_args());
+	}
+
+	#===============================================================================
+	# Return HTTP request method or check if request method equals with $method
+	#===============================================================================
+	public static function requestMethod($method = NULL) {
+		if(!empty($method)) {
+			return ($_SERVER['REQUEST_METHOD'] === $method);
+		}
+
+		return $_SERVER['REQUEST_METHOD'];
+	}
+
+	#===============================================================================
+	# Return REQUEST_URL
+	#===============================================================================
+	public static function requestURI() {
+		return $_SERVER['REQUEST_URL'] ?? FALSE;
+	}
+
+	#===============================================================================
+	# Sends a HTTP header line to the client
+	#===============================================================================
+	public static function responseHeader($field, $value) {
+		self::sendHeader("{$field}: {$value}");
+	}
+
+	#===============================================================================
+	# Sends a HTTP redirect to the client
+	#===============================================================================
+	public static function redirect($location, $code = 303, $exit = TRUE) {
+		http_response_code($code);
+		self::sendHeader("Location: {$location}");
+		$exit AND exit();
+	}
+
+	#===============================================================================
+	# Sends a new HTTP header line to the client if headers are not already sent
+	#===============================================================================
+	private static function sendHeader($header) {
+		if(!headers_sent()) {
+			header($header);
+		}
+	}
+}
+?>
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