public function parseLine($line) {
        $line = trim($line, "\r\n");

        if (preg_match('/^([\w-]+):\s+(.+)/', $line, $matches)) {
            $name = strtolower($matches[1]);
            $value = $matches[2];
            $this->currentHeader = $name;

            if (isset($this->headers[$name])) {
                if (!is_array($this->headers[$name])) {
                    $this->headers[$name] = [$this->headers[$name]];
                }
                $this->headers[$name][] = $value;
            }
            else {
                $this->headers[$name] = $value;
            }
        }
        elseif (preg_match('/^\s+(.+)$/', $line, $matches) && $this->currentHeader !== null) {
            if (is_array($this->headers[$this->currentHeader])) {
                $lastKey = sizeof($this->headers[$this->currentHeader]) - 1;
                $this->headers[$this->currentHeader][$lastKey] .= $matches[1];
            }
            else {
                $this->headers[$this->currentHeader] .= $matches[1];
            }
        }

        return $this;
    }