Sharkey/packages/backend/src/core/WebfingerService.ts

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/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
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import { URL } from 'node:url';
import { Injectable } from '@nestjs/common';
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import { query as urlQuery } from '@/misc/prelude/url.js';
import { HttpRequestService } from '@/core/HttpRequestService.js';
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import { bindThis } from '@/decorators.js';
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export type ILink = {
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href: string;
rel?: string;
};
export type IWebFinger = {
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links: ILink[];
subject: string;
};
const urlRegex = /^https?:\/\//;
const mRegex = /^([^@]+)@(.*)/;
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@Injectable()
export class WebfingerService {
constructor(
private httpRequestService: HttpRequestService,
) {
}
@bindThis
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public async webfinger(query: string): Promise<IWebFinger> {
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const url = this.genUrl(query);
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return await this.httpRequestService.getJson<IWebFinger>(url, 'application/jrd+json, application/json');
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}
@bindThis
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private genUrl(query: string): string {
if (query.match(urlRegex)) {
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const u = new URL(query);
return `${u.protocol}//${u.hostname}/.well-known/webfinger?` + urlQuery({ resource: query });
}
const m = query.match(mRegex);
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if (m) {
const hostname = m[2];
const useHttp = process.env.MISSKEY_WEBFINGER_USE_HTTP && process.env.MISSKEY_WEBFINGER_USE_HTTP.toLowerCase() === 'true';
return `http${useHttp ? '' : 's'}://${hostname}/.well-known/webfinger?${urlQuery({ resource: `acct:${query}` })}`;
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}
throw new Error(`Invalid query (${query})`);
}
}