SMMP/build/http/core/HttpRequest.php

<?php

	namespace http\core;


	class HttpRequest{

		/* [0] Constants
		=========================================================*/
		/* (1) Content-Type */
		const CT_BINARY                = 0; // unknown
		const CT_TEXT                  = 1;
		const CT_JSON                  = 2;
		const CT_YAML                  = 3;
		const CT_MULTIPART_FORM_DATA   = 4;
		const CT_X_WWW_FORM_URLENCODED = 5;


		/* [1] Attributes
		=========================================================*/
		private $uri;
		private $headers;
		private $method;
		private $postdata;
		private $getdata;

		private $type;
		private $body;


		/* [2] Constructs an HTTP Request based on environment
		*
		* @return instance<HttpRequest> 								auto-filled HTTP Request
		*
		=========================================================*/
		public function __construct(){
			/* [1] Define URI & Status Code & method
			=========================================================*/
			$this->uri        = $_SERVER['REQUEST_URI'];
			$this->method     = $_SERVER['REQUEST_METHOD'];


			/* [2] Define headers
			=========================================================*/
			$this->headers = \getallheaders();


			/* [3] Define default datasets (GET, POST)
			=========================================================*/
			$this->getdata  = $_GET;
			$this->postdata = $_POST;


			/* [4] Define BODY & its type
			=========================================================*/
			/* (1) Default: set plain/text body */
			$this->body = \file_get_contents('php://input');

			/* (2) Fetch content type */
			if( isset($this->headers['Content-Type']) )
				$this->type  = self::getContentType($this->headers['Content-Type']);
			else
				$this->type  = self::getContentType();


			/* [5] Parse BODY data -> POST
			=========================================================*/
			$this->parseBody();
		}



		/* GET CONSTANT CT_* FROM `Content-Type` HEADER
		*
		* @pContentType<String> 								`Content-Type` header value
		*
		* @return type<int> 									Constant value
		*
		*/
		private static function getContentType($pContentType=null){
			/* [1] Checks argv
			=========================================================*/
			if( is_null($pContentType) )
				if( isset($_SERVER['CONTENT_TYPE']) )
					$pContentType = $_SERVER['CONTENT_TYPE'];
				else
					$pContentType = 'text/plain';


			/* [2] Checks types
			=========================================================*/
			/* (1) Form Data Types
			---------------------------------------------------------*/
			/* (1) multipart/form-data */
			if( preg_match('/^multipart\/form\-data; boundary=(.+)$/i', $pContentType) )
				return self::CT_MULTIPART_FORM_DATA;

			/* (2) application/x-www-form-urlencoded */
			if( preg_match('/^application\/x\-www\-form\-urlencoded/i', $pContentType) )
				return self::CT_X_WWW_FORM_URLENCODED;


			/* (2) Data types
			---------------------------------------------------------*/
			/* (1) Basic JSON content type */
			if( preg_match('/^application\/json/i', $pContentType) )
				return self::CT_JSON;

			/* (2) Basic YAML content type */
			if( preg_match('/^application\/yaml/i', $pContentType) )
				return self::CT_YAML;

			/* (3) Basic TEXT content type */
			if( preg_match('/text\/[a-z]+/', $pContentType) )
				return self::CT_TEXT;


			/* (3) Default Type
			---------------------------------------------------------*/
			return self::CT_BINARY;

		}



		/* PARSES BODY DATA
		*
		*/
		private function parseBody(){
			/* [1] If empty body -> do nothing
			=========================================================*/
			if( strlen($this->body) === 0 )
				return true;


			/* [2] Management for each ContentType
			=========================================================*/
			switch($this->type){

				/* (1) multipart/form-data -> parse for not-POST methods
				---------------------------------------------------------*/
				case self::CT_MULTIPART_FORM_DATA:
					/* (1) Fetch the boundary */
					if( !preg_match('/boundary=(.+)$/i', $this->headers['Content-Type'], $match) )
						return false;

					$boundary = $match[1];

					/* (2) Break body into parts */
					$splitter  = "/(?:\n|\r\n|--)*$boundary(?:\n|\r\n|--)?/im";
					$parts     = preg_split($splitter, $this->body);

					/* (3) Process parts */
					foreach($parts as $part)
						if( preg_match('/^Content\-Disposition: form\-data; name=\"([^"]+)\"(?:\n|\r\n){2}(.+)$/mi', $part, $match) )
							$this->postdata[$match[1]] = $match[2];

					/* (4) Erases body */
					$this->body = '';
					break;


				/* (2) application/x-www-form-urlencoded -> parse for not-POST methods
				---------------------------------------------------------*/
				case self::CT_X_WWW_FORM_URLENCODED:
					/* Auto parse builtin-php function */
					parse_str($this->body, $this->postdata);

					/* Erases body */
					$this->body = '';
					break;


				/* (3) application/json -> parse if no error
				---------------------------------------------------------*/
				case self::CT_JSON:
					/* (1) Decode body content */
					$decoded = json_decode($this->body, true);

					/* (2) If error -> do nothing */
					if( is_null($decoded) )
						return;

					/* (3) Parse body into body */
					$this->body = $decoded;
					break;


				/* (4) application/yaml -> parse if no error
				---------------------------------------------------------*/
				case self::CT_YAML:

					break;
			}
		}


		public function BODY(){    return $this->body;     }
		public function POST(){    return $this->postdata; }
		public function GET(){     return $this->getdata;  }
		public function HEADERS(){ return $this->headers;  }
		public function METHOD(){  return $this->method;   }
		public function URI(){     return $this->uri;      }
	}