109 lines
2.0 KiB
JavaScript
109 lines
2.0 KiB
JavaScript
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import {isIPv6, isIPv4} from 'is-ip';
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import {createPublicIp, IpNotFoundError} from './core.js';
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export class CancelError extends Error {
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constructor() {
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super('Request was cancelled');
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this.name = 'CancelError';
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}
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get isCanceled() {
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return true;
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}
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}
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export {IpNotFoundError} from './core.js';
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const defaults = {
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timeout: 5000,
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};
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const urls = {
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v4: [
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'https://ipv4.icanhazip.com/',
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'https://api.ipify.org/',
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],
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v6: [
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'https://ipv6.icanhazip.com/',
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'https://api6.ipify.org/',
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],
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};
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const sendXhr = (url, options, version) => {
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const xhr = new XMLHttpRequest();
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let _reject;
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const promise = new Promise((resolve, reject) => {
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_reject = reject;
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xhr.addEventListener('error', reject, {once: true});
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xhr.addEventListener('timeout', reject, {once: true});
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xhr.addEventListener('load', () => {
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const ip = xhr.responseText.trim();
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const method = version === 'v6' ? isIPv6 : isIPv4;
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if (!ip || !method(ip)) {
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reject();
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return;
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}
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resolve(ip);
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}, {once: true});
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xhr.open('GET', url);
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xhr.timeout = options.timeout;
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xhr.send();
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});
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promise.cancel = () => {
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xhr.abort();
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_reject(new CancelError());
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};
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return promise;
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};
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const queryHttps = (version, options) => {
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let request;
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const promise = (async function () {
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const urls_ = [
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...urls[version],
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...(options.fallbackUrls ?? []),
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];
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let lastError;
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for (const url of urls_) {
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try {
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request = sendXhr(url, options, version);
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// eslint-disable-next-line no-await-in-loop
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const ip = await request;
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return ip;
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} catch (error) {
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lastError = error;
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if (error instanceof CancelError) {
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throw error;
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}
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}
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}
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throw new IpNotFoundError({cause: lastError});
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})();
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promise.cancel = () => {
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request.cancel();
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};
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return promise;
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};
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export const publicIp = createPublicIp(publicIpv4, publicIpv6);
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export function publicIpv4(options) {
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return queryHttps('v4', {...defaults, ...options});
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}
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export function publicIpv6(options) {
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return queryHttps('v6', {...defaults, ...options});
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}
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