From 8a7dbd11d0259ed9bb4046ab82481042fde8714b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kat=20March=C3=A1n?= <kzm@sykosomatic.org>
Date: Mon, 3 Apr 2017 21:09:23 -0700
Subject: [PATCH] feat(cache): add special headers when request was loaded
 straight from cache

---
 cache.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/cache.js b/cache.js
index abcd72c..d18d593 100644
--- a/cache.js
+++ b/cache.js
@@ -47,10 +47,13 @@ module.exports = class Cache {
         cacheIntegrity: info.integrity,
         integrity: opts && opts.integrity
       })) {
+        const resHeaders = new fetch.Headers(info.metadata.resHeaders)
+        resHeaders.set('X-LOCAL-CACHE', this._path)
+        resHeaders.set('X-LOCAL-CACHE-TIME', new Date(info.time).toUTCString())
         if (req.method === 'HEAD') {
           return new fetch.Response(null, {
             url: req.url,
-            headers: info.metadata.resHeaders,
+            headers: resHeaders,
             status: 200
           })
         }
@@ -94,7 +97,7 @@ module.exports = class Cache {
           body.write('dummy')
           return new fetch.Response(body, {
             url: req.url,
-            headers: info.metadata.resHeaders,
+            headers: resHeaders,
             status: 200,
             size: stat.size
           })