code: private function multipartFromData ()
  	{
  		$body = explode('--' . $this->header['content-type-params']['boundary'], $this->raw_context);
  		unset($body[0], $body[ count($body) ]);
  
  		foreach ($body as $value) {
  			$_     = explode("\r\n\r\n", $value);
  			$_info = explode("\r\n", $_[0]);
  
  			$_tmp = [];
  
  			$_tmp_arr = explode(';', $_info[1]);
  
  			foreach ($_tmp_arr as $k => $v) {
  				if (0 === $k) {
  					$__tmp                   = explode(':', $v);
  					$_tmp[ trim($__tmp[0]) ] = trim($__tmp[1]);
  				}
  				else {
  					$__tmp                   = explode('=', $v);
  					$_tmp[ trim($__tmp[0]) ] = trim($__tmp[1], '"');
  				}
  			}
  			if (isset($_tmp['filename'])) {
  				$file_path     = Conf::createTempFile($this->session_id, 'haoge.tmpfile.' . uniqid(), $_[ count($_) - 1 ]);
  				$this->files[] = [
  					'size'  => filesize($file_path),
  					'name'  => $_tmp['filename'],
  					'tmp'   => $file_path,
  					//					'tmp_name' => $file_path,
  					'error' => !(bool)$file_path,
  					'type'  => trim(explode(':', $_info[2])[1])
  				];
  			}
  			else {
  				$this->body[ $_tmp['name'] ] = trim($_[ count($_) - 1 ]);
  			}
  
  		}
  	}
docs: 文件上传 或者 form-data