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Add og:image support

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lifegpc
2024-08-11 22:28:59 +08:00
parent 94feb24f72
commit 8b1ff26b9c
1 changed files with 40 additions and 0 deletions
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40
routes/_middleware.ts
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@@ -11,6 +11,10 @@ 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"];
@@ -94,6 +98,42 @@ export async function handler(req: Request, ctx: FreshContext) {
)?.setAttribute("content", title);
doc.querySelector('meta[name="description"]')
?.setAttribute("content", desc);
if (m.cfg.img_verify_secret && 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 me = dom.createElement("meta");
me.setAttribute("name", "og:image");
me.setAttribute("content", url);
doc.querySelector("head")?.append(me);
}
}
}
return new Response(
"<!DOCTYPE html>\n" + doc.outerHTML,
{