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import { getJson } from '../misc/fetch';
import { query as urlQuery } from '../prelude/url';
type ILink = {
href: string;
rel?: string;
};
type IWebFinger = {
links: ILink[];
subject: string;
};
export default async function(query: string): Promise<IWebFinger> {
const url = genUrl(query);
return await getJson(url, 'application/jrd+json, application/json');
}
function genUrl(query: string) {
if (query.match(/^https?:\/\//)) {
const u = new URL(query);
return `${u.protocol}//${u.hostname}/.well-known/webfinger?` + urlQuery({ resource: query });
}
const m = query.match(/^([^@]+)@(.*)/);
if (m) {
const hostname = m[2];
return `https://${hostname}/.well-known/webfinger?` + urlQuery({ resource: `acct:${query}` });
}
throw new Error(`Invalid query (${query})`);
}
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