Notice: Undefined index: content-type in nusoap.php on line 7775

[wadedung]

Hello.
As title. I got an error when I was using proxy. But It worked without proxy.
I try to compare the distinct between this two condition.
And I found that There was one more header which was returned by proxy.

response with proxy

HTTP/1.1 200 Connection established

HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Server: nginx
.
.
.

response without proxy

HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Server: nginx
.
.
.

And I found relative code at nusoap.php line 2819

/**
     * Test if the given string starts with a header that is to be skipped.
     * Skippable headers result from chunked transfer and proxy requests.
     *
     * @param    string $data The string to check.
     * @returns    boolean    Whether a skippable header was found.
     * @access    private
     */
    function isSkippableCurlHeader(&$data)
    {
        $skipHeaders = array('HTTP/1.1 100',
            'HTTP/1.0 301',
            'HTTP/1.1 301',
            'HTTP/1.0 302',
            'HTTP/1.1 302',
            'HTTP/1.0 401',
            'HTTP/1.1 401',
            'HTTP/1.0 200 Connection established');
        foreach ($skipHeaders as $hd) {
            $prefix = substr($data, 0, strlen($hd));
            if ($prefix == $hd) return TRUE;
        }

        return FALSE;
    }

It only filter HTTP/1.0 200 Connection established.
Why the header HTTP/1.1 200 Connection established should be reserve?