From a9e34e4b0f734d3fb9e6f7a22d9497c7cb4ac555 Mon Sep 17 00:00:00 2001
From: Leo Lutz <leo@leolutz.com>
Date: Fri, 18 Oct 2019 17:36:42 -0700
Subject: [PATCH 1/2] Add Cloudflare caching

---
 readme.md         |  1 +
 src/handler.js    | 16 +++++++++++++++-
 webpack.config.js |  1 +
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/readme.md b/readme.md
index c8af2e4..c3edb31 100644
--- a/readme.md
+++ b/readme.md
@@ -66,6 +66,7 @@ In addition to the required `AIRTABLE_API_KEY` and `AIRTABLE_API_BASE_ID` variab
 - `AIRTABLE_API_VERSION` - Defaults to `v0`.
 - `PROXY_PREFIX` - Use this if your Cloudflare worker's routes are prefixed by something before the Airtable resource name. For example, you may want to call `mycustomdomain.com/api/posts` instead of `mycustomdomain.com/posts`. In this example, you would add `api` as a prefix.
 - `ALLOWED_TARGETS` - Use this to lock down your Airtable API to specific resources and methods. For example, a stringified JSON object like this: `'[{"resource":"posts","method":"GET,PUT"},{"resource":"comments","method":"*"}]'` will allow `GET` and `PUT` requests on the `posts` resource and all request methods on the `comments` resource. Allows all methods for all resources by default.
+- `PROXY_CACHE_TIME` - Defaults to `0`. The number of seconds set on the `Cache-Control` header to use Cloudflare's caching.
 
 
 ## Contributing
diff --git a/src/handler.js b/src/handler.js
index 89951b9..5f6a227 100644
--- a/src/handler.js
+++ b/src/handler.js
@@ -31,7 +31,7 @@ export async function handleRequest(req) {
       });
     }
 
-    return fetch(target.airtableRequestUrl, {
+    const response = await fetch(target.airtableRequestUrl, {
       headers: {
         Authorization: `Bearer ${config.airtableApiKey}`,
         "Content-type": "application/json"
@@ -39,6 +39,20 @@ export async function handleRequest(req) {
       method: method,
       body: req.body
     });
+
+    const body = await response.body;
+
+    const headers = new Headers();
+    for (const kv of response.headers.entries()) {
+      headers.append(kv[0], kv[1]);
+    }
+    headers.set('Cache-Control', 'max-age=' + config.cacheTime);
+
+    return new Response(body, {
+      status: response.status,
+      statusText: response.statusText,
+      headers: headers
+    });
   } catch (e) {
     console.error(e);
 
diff --git a/webpack.config.js b/webpack.config.js
index 4515416..d6ceddf 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -10,6 +10,7 @@ module.exports = {
         airtableBaseId: JSON.stringify(process.env.AIRTABLE_API_BASE_ID || ''),
         airtableApiVersion: JSON.stringify(process.env.AIRTABLE_API_VERSION || 'v0'),
         airtableApiKey: JSON.stringify(process.env.AIRTABLE_API_KEY || ''),
+        cacheTime: JSON.stringify(process.env.PROXY_CACHE_TIME || 0),
         prefix: JSON.stringify(process.env.PROXY_PREFIX || ''),
         allowedTargets: JSON.stringify(process.env.ALLOWED_TARGETS || '*'),
       },

From 03cca9f671363cb80d12dceaef0f8592b99ea3fa Mon Sep 17 00:00:00 2001
From: Leo Lutz <leo@leolutz.com>
Date: Fri, 18 Oct 2019 17:55:09 -0700
Subject: [PATCH 2/2] Ran prettier and fixed quotes

---
 src/handler.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/handler.js b/src/handler.js
index 5f6a227..b5be735 100644
--- a/src/handler.js
+++ b/src/handler.js
@@ -46,7 +46,7 @@ export async function handleRequest(req) {
     for (const kv of response.headers.entries()) {
       headers.append(kv[0], kv[1]);
     }
-    headers.set('Cache-Control', 'max-age=' + config.cacheTime);
+    headers.set("Cache-Control", "max-age=" + config.cacheTime);
 
     return new Response(body, {
       status: response.status,