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import { URL } from 'node:url';
import { Inject, Injectable } from '@nestjs/common';
import { DI } from '@/di-symbols.js';
import type { Config } from '@/config.js';
import { query as urlQuery } from '@/misc/prelude/url.js';
import { HttpRequestService } from '@/core/HttpRequestService.js';
type ILink = {
href: string;
rel?: string;
};
type IWebFinger = {
links: ILink[];
subject: string;
};
@Injectable()
export class WebfingerService {
constructor(
@Inject(DI.config)
private config: Config,
private httpRequestService: HttpRequestService,
) {
}
public async webfinger(query: string): Promise<IWebFinger> {
const url = this.genUrl(query);
return await this.httpRequestService.getJson(url, 'application/jrd+json, application/json') as IWebFinger;
}
private genUrl(query: string): 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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