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generate thumbnail for og:image

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lifegpc
2024-08-12 13:28:37 +08:00
parent 296cd3a5ba
commit 576b8c1208
3 changed files with 14 additions and 30 deletions
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34
routes/_middleware.ts
View File

@@ -11,9 +11,6 @@ import { i18n_get_lang } from "../server/i18ns.ts";
import { SharedTokenType } from "../db.ts";
import { initDOMParser } from "../utils.ts";
import { DOMParser } from "deno_dom/wasm-noinit";
import pbkdf2Hmac from "pbkdf2-hmac";
import { encodeBase64 } from "@std/encoding/base64";
import { extname } from "@std/path";
import { get_host } from "../server/utils.ts";
const STATIC_FILES = ["/common.css", "/scrollBar.css", "/sw.js", "/sw.js.map"];
@@ -107,35 +104,16 @@ export async function handler(req: Request, ctx: FreshContext) {
ogd.setAttribute("content", desc);
head?.append(ogt);
head?.append(ogd);
if (m.cfg.img_verify_secret && doc) {
if (doc) {
const p = m.db.get_pmeta_by_index(st.info.gid, 1);
if (p) {
const t = m.db.get_files(p.token);
if (t.length) {
const tverify = encodeBase64(
new Uint8Array(
await pbkdf2Hmac(
`${t[0].id}`,
m.cfg.img_verify_secret,
1000,
64,
"SHA-512",
),
),
);
let url: string | undefined;
if (m.cfg.use_path_based_img_url) {
const ext = extname(t[0].path);
url = `${get_host(req)}/file/${
encodeURIComponent(tverify)
}/${t[0].id}${ext}`;
} else {
const b = new URLSearchParams();
b.append("verify", tverify);
url = `${get_host(req)}/file/${
t[0].id
}?${b}`;
}
const url = `${
get_host(req)
}/api/thumbnail/${t[0].id}?max=1920&share=${
encodeURIComponent(st.token)
}`;
const me = dom.createElement("meta");
me.setAttribute("name", "og:image");
me.setAttribute("content", url);

4
routes/api/_middleware.ts
View File

@@ -18,7 +18,9 @@ function handle_auth(req: Request, ctx: FreshContext) {
is_from_cookie = true;
}
if (
u.pathname.startsWith("/api/export/gallery/zip/") &&
(u.pathname.startsWith("/api/export/gallery/zip/") ||
u.pathname.match(/^\/api\/file\/\d+/) ||
u.pathname.match(/^\/api\/thumbnail\/\d+$/)) &&
req.method === "GET"
) {
token = u.searchParams.get("share");

6
routes/api/thumbnail/[id].ts
View File

@@ -123,7 +123,11 @@ export const handler: Handlers = {
}
if (!force) {
if (cfg.width > f.width || cfg.height > f.height) {
return Response.redirect(`${get_host(req)}/api/file/${f.id}`);
const share = u.searchParams.get("share");
const q = share ? `?share=${encodeURIComponent(share)}` : "";
return Response.redirect(
`${get_host(req)}/api/file/${f.id}${q}`,
);
}
}
const output = generate_filename(b, f, cfg);