58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
import * as Koa from 'koa';
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import * as request from 'request-promise-native';
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import summaly from 'summaly';
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import { fetchMeta } from '../../misc/fetch-meta';
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import Logger from '../../services/logger';
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import config from '../../config';
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import { query } from '../../prelude/url';
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const logger = new Logger('url-preview');
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module.exports = async (ctx: Koa.Context) => {
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const meta = await fetchMeta();
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logger.info(meta.summalyProxy
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? `(Proxy) Getting preview of ${ctx.query.url}@${ctx.query.lang} ...`
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: `Getting preview of ${ctx.query.url}@${ctx.query.lang} ...`);
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try {
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const summary = meta.summalyProxy ? await request.get({
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url: meta.summalyProxy,
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qs: {
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url: ctx.query.url,
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lang: ctx.query.lang || 'ja-JP'
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},
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forever: true,
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json: true
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}) : await summaly(ctx.query.url, {
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followRedirects: false,
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lang: ctx.query.lang || 'ja-JP'
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});
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logger.succ(`Got preview of ${ctx.query.url}: ${summary.title}`);
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summary.icon = wrap(summary.icon);
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summary.thumbnail = 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 (e) {
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logger.warn(`Failed to get preview of ${ctx.query.url}: ${e}`);
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ctx.status = 200;
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ctx.set('Cache-Control', 'max-age=86400, immutable');
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ctx.body = '{}';
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}
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};
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function wrap(url?: string): string | null {
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return url != null
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? url.match(/^https?:\/\//)
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? `${config.url}/proxy/preview.jpg?${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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