90 lines
2.0 KiB
TypeScript
90 lines
2.0 KiB
TypeScript
import type Koa from "koa";
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import summaly from "summaly";
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import { fetchMeta } from "backend-rs";
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import Logger from "@/services/logger.js";
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import { config } from "@/config.js";
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import { query } from "@/prelude/url.js";
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import { getJson } from "@/misc/fetch.js";
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import { inspect } from "node:util";
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const logger = new Logger("url-preview");
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export const urlPreviewHandler = async (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 fetchMeta(true);
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logger.info(
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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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);
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try {
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const summary = meta.summalyProxy
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? await getJson(
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`${meta.summalyProxy}?${query({
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url: url,
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lang: lang ?? "en-US",
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})}`,
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)
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: await summaly.default(url, {
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followRedirects: false,
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lang: lang ?? "en-US",
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});
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logger.info(`Got preview of ${url}: ${summary.title}`);
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if (
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summary.url &&
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!(summary.url.startsWith("http://") || summary.url.startsWith("https://"))
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) {
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throw new Error("unsupported schema included");
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}
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if (
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summary.player?.url &&
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!(
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summary.player.url.startsWith("http://") ||
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summary.player.url.startsWith("https://")
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)
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) {
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throw new Error("unsupported schema included");
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}
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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 (err) {
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logger.warn(`Failed to get preview of ${url}:\n${inspect(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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function wrap(url?: string): string | null {
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return url != null
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? url.match(/^https?:\/\//)
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? `${config.url}/proxy/preview.webp?${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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