Hprose\Swoole\Http\Client::setHeader PHP Method

    public function setHeader($name, $value)
    {
        $lname = strtolower($name);
        if ($lname != 'content-type' && $lname != 'content-length' && $lname != 'host') {
            if ($value) {
                $this->header[$name] = $value;
            } else {
                unset($this->header[$name]);
            }
        }
    }