pac-resolver/dist/myIpAddress.js

Generates an asynchronous resolver function from a PAC file

import { ip } from './ip.js';
import net from 'net';
/**
 * Returns the IP address of the host that the Navigator is running on, as
 * a string in the dot-separated integer format.
 *
 * Example:
 *
 * ``` js
 * myIpAddress()
 *   // would return the string "198.95.249.79" if you were running the
 *   // Navigator on that host.
 * ```
 *
 * @return {String} external IP address
 */
export default async function myIpAddress() {
    return new Promise((resolve, reject) => {
        // 8.8.8.8:53 is "Google Public DNS":
        // https://developers.google.com/speed/public-dns/
        const socket = net.connect({ host: '8.8.8.8', port: 53 });
        const onError = () => {
            // if we fail to access Google DNS (as in firewall blocks access),
            // fallback to querying IP locally
            resolve(ip.address());
        };
        socket.once('error', onError);
        socket.once('connect', () => {
            socket.removeListener('error', onError);
            const addr = socket.address();
            socket.destroy();
            if (typeof addr === 'string') {
                resolve(addr);
            }
            else if (addr.address) {
                resolve(addr.address);
            }
            else {
                reject(new Error('Expected a `string`'));
            }
        });
    });
}
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