41 lines
1.1 KiB
TypeScript
Vendored
41 lines
1.1 KiB
TypeScript
Vendored
import * as psl from 'psl';
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// Extracts the domain from a given URL.
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export function getDomain(inputUrl: string): string | null {
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try {
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const url = new URL(inputUrl);
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// Use PSL to parse domain names.
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const parsed = psl.parse(url.hostname);
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// If domain is available, split it and return the SLD.
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if ('domain' in parsed && parsed.domain) {
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return parsed.domain.split('.')[0];
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} else {
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return null;
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}
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} catch (error) {
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return null;
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}
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}
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// Appends 'https://' protocol to the URL if not present.
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export function appendProtocol(inputUrl: string): string {
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try {
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new URL(inputUrl);
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return inputUrl;
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} catch {
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return `https://${inputUrl}`;
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}
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}
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// Normalizes the URL by ensuring it has a protocol and is valid.
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export function normalizeUrl(urlToNormalize: string): string {
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const urlWithProtocol = appendProtocol(urlToNormalize);
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try {
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new URL(urlWithProtocol);
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return urlWithProtocol;
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} catch (err) {
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throw new Error(`Your url "${urlWithProtocol}" is invalid: ${(err as Error).message}`);
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}
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}
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