// Some interpreters do not implement alert - this can be used in either case.
function safeAlert(message) {
    if (typeof alert !== 'undefined') {
        alert(message);
    }
}

function FindProxyForURL(url, host) {
    // Allow a direct connection to IANA reserved private interest ranges.
    // See: https://datatracker.ietf.org/doc/html/rfc1918#section-3
    //
    // MDN states that isInNet resolves a hostnamed if passed, but this function
    // seems to crash on Safari if passed a hostname - hence pre-resolving.
    // https://developer.mozilla.org/en-US/docs/Web/HTTP/Proxy_servers_and_tunneling/Proxy_Auto-Configuration_PAC_file#isinnet
    const resolvedHost = dnsResolve(host);
    if (
        isInNet(resolvedHost, '10.0.0.0', '255.0.0.0') ||
        isInNet(resolvedHost, '172.16.0.0', '255.240.0.0') ||
        isInNet(resolvedHost, '192.168.0.0', '255.255.0.0')
    ) {
        safeAlert('using DIRECT for ' + host);
        return 'DIRECT';
    }

    const rv = 'PROXY 82.219.26.70:4000';
    safeAlert('using ' + rv + ' for ' + host);
    return rv;
}