From f6321fc3249d83a0059ef47978ed101d3c75375f Mon Sep 17 00:00:00 2001
From: Travis Fischer <fisch0920@gmail.com>
Date: Wed, 2 Jun 2021 13:59:27 -0400
Subject: feat: import from notion2site repo

---
 src/fetch-cache.js | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 src/fetch-cache.js

(limited to 'src/fetch-cache.js')

diff --git a/src/fetch-cache.js b/src/fetch-cache.js
new file mode 100644
index 0000000..3fb6830
--- /dev/null
+++ b/src/fetch-cache.js
@@ -0,0 +1,34 @@
+const cache = caches.default
+
+export async function fetchCache(opts) {
+  const { event, cacheKey, fetch: fetchResponse } = opts
+
+  let response
+
+  if (cacheKey) {
+    console.log('cacheKey', cacheKey.url)
+    response = await cache.match(cacheKey)
+  }
+
+  if (!response) {
+    response = await fetchResponse()
+    response = new Response(response.body, response)
+
+    if (cacheKey) {
+      if (response.headers.has('Cache-Control')) {
+        // cache will respect response headers
+        event.waitUntil(
+          cache.put(cacheKey, response.clone()).catch((err) => {
+            console.warn('cache put error', cacheKey, err)
+          })
+        )
+      }
+
+      response.headers.set('cf-cache-status', 'MISS')
+    } else {
+      response.headers.set('cf-cache-status', 'BYPASS')
+    }
+  }
+
+  return response
+}
-- 
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