From 99011cb1b0d20da9cb523729ed0e9ff4e9c27405 Mon Sep 17 00:00:00 2001
From: Anton Bulakh <him@necauq.ua>
Date: Fri, 27 Dec 2024 14:18:22 +0000
Subject: [PATCH] fix(spa): handle HTML redirects for aliases (#1680)
---
quartz/components/scripts/util.ts | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/quartz/components/scripts/util.ts b/quartz/components/scripts/util.ts
index d0a16c6..c1db8ba 100644
--- a/quartz/components/scripts/util.ts
+++ b/quartz/components/scripts/util.ts
@@ -24,3 +24,22 @@
node.removeChild(node.firstChild)
}
}
+
+// AliasRedirect emits HTML redirects which also have the link[rel="canonical"]
+// containing the URL it's redirecting to.
+// Extracting it here with regex is _probably_ faster than parsing the entire HTML
+// with a DOMParser effectively twice (here and later in the SPA code), even if
+// way less robust - we only care about our own generated redirects after all.
+const canonicalRegex = /<link rel="canonical" href="([^"]*)">/
+
+export async function fetchCanonical(url: URL): Promise<Response> {
+ const res = await fetch(`${url}`)
+ if (!res.headers.get("content-type")?.startsWith("text/html")) {
+ return res
+ }
+ // reading the body can only be done once, so we need to clone the response
+ // to allow the caller to read it if it's was not a redirect
+ const text = await res.clone().text()
+ const [_, redirect] = text.match(canonicalRegex) ?? []
+ return redirect ? fetch(redirect) : res
+}
--
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