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fix: refresh substack feed every 10m and drop dead feed url #53

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Merged
kaiiiichen merged 1 commit into from
May 8, 2026
Merged

fix: refresh substack feed every 10m and drop dead feed url #53

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13 changes: 8 additions & 5 deletions app/lib/substack.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,13 @@ export type SubstackPost = {
description: string;
};

const FEEDS = [
"https://substack.com/@kaiiiichen/feed",
"https://kaiiiichen.substack.com/feed",
];
// `https://substack.com/@<user>/feed` started returning 404 (it serves the
// generic discover HTML page now), so we hit the publication feed directly.
const FEEDS = ["https://kaiiiichen.substack.com/feed"];

// Refetch the RSS feed every 10 minutes so newly-published posts appear on the
// homepage within ~10 min instead of the previous 1 h window.
const REVALIDATE_SECONDS = 600;

function extractTag(xml: string, tag: string): string {
const cdataMatch = new RegExp(`<${tag}[^>]*><!\\[CDATA\\[([\\s\\S]*?)\\]\\]><\\/${tag}>`, "i").exec(xml);
Expand All @@ -34,7 +37,7 @@ export async function getSubstackPosts(): Promise<SubstackPost[]> {
for (const feed of FEEDS) {
try {
const res = await fetch(feed, {
next: { revalidate: 3600 },
next: { revalidate: REVALIDATE_SECONDS },
headers: { "User-Agent": "kaichen.dev/1.0" },
});
if (!res.ok) continue;
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