dns: remove redundant code using common variable · nodejs/node@4fe9916

getDefaultResultOrder,

setDefaultResultOrder,

errorCodes: dnsErrorCodes,

validDnsOrders,

validFamilies,

} = require('internal/dns/utils');

const {

Resolver,

// Easy DNS A/AAAA look up

// lookup(hostname, [options,] callback)

const validFamilies = [0, 4, 6];

function lookup(hostname, options, callback) {

let hints = 0;

let family = 0;

dnsOrder = options.verbatim ? 'verbatim' : 'ipv4first';

}

if (options?.order != null) {

validateOneOf(options.order, 'options.order', ['ipv4first', 'ipv6first', 'verbatim']);

validateOneOf(options.order, 'options.order', validDnsOrders);

dnsOrder = options.order;

}

}

getDefaultResultOrder,

setDefaultResultOrder,

setDefaultResolver,

validDnsOrders,

validFamilies,

} = require('internal/dns/utils');

const {

});

}

const validFamilies = [0, 4, 6];

/**

* Get the IP address for a given hostname.

* @param {string} hostname - The hostname to resolve (ex. 'nodejs.org').

dnsOrder = options.verbatim ? 'verbatim' : 'ipv4first';

}

if (options?.order != null) {

validateOneOf(options.order, 'options.order', ['ipv4first', 'ipv6first', 'verbatim']);

validateOneOf(options.order, 'options.order', validDnsOrders);

dnsOrder = options.order;

}

}

let defaultResolver;

let dnsOrder;

const validDnsOrders = ['verbatim', 'ipv4first', 'ipv6first'];

const validFamilies = [0, 4, 6];

function initializeDns() {

const orderFromCLI = getOptionValue('--dns-result-order');

if (!orderFromCLI) {

dnsOrder ??= 'verbatim';

} else {

// Allow the deserialized application to override order from CLI.

validateOneOf(orderFromCLI, '--dns-result-order', ['verbatim', 'ipv4first', 'ipv6first']);

validateOneOf(orderFromCLI, '--dns-result-order', validDnsOrders);

dnsOrder = orderFromCLI;

}

}

function setDefaultResultOrder(value) {

validateOneOf(value, 'dnsOrder', ['verbatim', 'ipv4first', 'ipv6first']);

validateOneOf(value, 'dnsOrder', validDnsOrders);

dnsOrder = value;

}

errorCodes,

createResolverClass,

initializeDns,

validDnsOrders,

validFamilies,

};