index.js

@@ -63,6 +63,7 @@ async function serveId(id, req, res, next) {
 		res.status(203);
 		res.type(pxreq.headers.get("Content-Type"));
 		res.header("Content-Disposition", `filename=${url.split('/').pop()}`);
+		res.header("Cache-Control", "max-age=99999999999999");
 		res.header("X-Pixiv-Id", id);
 		if (req.query.auto) res.header("Refresh", `${Number(req.query.auto)}; url=${getRandomUrl(req)}`);
 		pxreq.body.pipe(res);
@@ -106,7 +107,6 @@ app.get("/img/random", (req, res, next) => {
 
 // simple serve id without redirects
 app.get("/img/:id", (req, res, next) => {
-	res.header("Cache-Control", "max-age=99999999999999");
 	serveId(req.params.id, req, res, next);
 });