85 lines
2.1 KiB
TypeScript
85 lines
2.1 KiB
TypeScript
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import { Inject, Injectable } from '@nestjs/common';
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import summaly from 'summaly';
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import { DI } from '@/di-symbols.js';
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import { UsersRepository } from '@/models/index.js';
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import { Config } from '@/config.js';
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import { MetaService } from '@/core/MetaService.js';
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import { HttpRequestService } from '@/core/HttpRequestService.js';
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import Logger from '@/logger.js';
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import { query } from '@/misc/prelude/url.js';
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import type Koa from 'koa';
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@Injectable()
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export class UrlPreviewService {
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#logger: Logger;
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constructor(
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@Inject(DI.config)
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private config: Config,
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@Inject(DI.usersRepository)
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private usersRepository: UsersRepository,
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private metaService: MetaService,
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private httpRequestService: HttpRequestService,
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) {
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this.#logger = new Logger('url-preview');
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}
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#wrap(url?: string): string | null {
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return url != null
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? url.match(/^https?:\/\//)
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? `${this.config.url}/proxy/preview.webp?${query({
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url,
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preview: '1',
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})}`
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: url
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: null;
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}
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public async handle(ctx: Koa.Context) {
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const url = ctx.query.url;
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if (typeof url !== 'string') {
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ctx.status = 400;
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return;
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}
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const lang = ctx.query.lang;
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if (Array.isArray(lang)) {
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ctx.status = 400;
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return;
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}
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const meta = await this.metaService.fetch();
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this.#logger.info(meta.summalyProxy
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? `(Proxy) Getting preview of ${url}@${lang} ...`
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: `Getting preview of ${url}@${lang} ...`);
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try {
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const summary = meta.summalyProxy ? await this.httpRequestService.getJson(`${meta.summalyProxy}?${query({
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url: url,
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lang: lang ?? 'ja-JP',
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})}`) : await summaly.default(url, {
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followRedirects: false,
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lang: lang ?? 'ja-JP',
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});
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this.#logger.succ(`Got preview of ${url}: ${summary.title}`);
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summary.icon = this.#wrap(summary.icon);
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summary.thumbnail = this.#wrap(summary.thumbnail);
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// Cache 7days
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ctx.set('Cache-Control', 'max-age=604800, immutable');
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ctx.body = summary;
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} catch (err) {
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this.#logger.warn(`Failed to get preview of ${url}: ${err}`);
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ctx.status = 200;
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ctx.set('Cache-Control', 'max-age=86400, immutable');
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ctx.body = '{}';
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}
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}
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}
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