DOP-5189: Create Netlify function to proxy URL fetch (#1310)

netlify/functions/fetch-url.js

@@ -0,0 +1,46 @@
+import axios from 'axios';
+
+async function handleURL({ url }) {
+  try {
+    const { data } = await axios.get(url, {
+      // Throws error whenever response status >= 400
+      validateStatus: (status) => {
+        console.log(`Returning status ${status} for ${url}`);
+        return status < 400;
+      },
+    });
+
+    return new Response(data, {
+      status: 200,
+      headers: {
+        'Cache-Control': 'public, durable, max-age=300',
+      },
+    });
+  } catch (err) {
+    console.log({ err });
+
+    if (axios.isAxiosError(err) && err.response) {
+      return new Response(null, { status: err.response.status });
+    }
+    return new Response(null, { status: 500 });
+  }
+}
+
+// This function exists only to help proxy URLs that were originally causing 403 errors, potentially due
+// to IP addresses. (DOP-5189)
+async function handler(req, context) {
+  const params = context.url.searchParams;
+  const url = params.get('url');
+
+  // Log to help keep track of requests
+  console.log({ req, context });
+
+  if (url) {
+    return handleURL({ url });
+  }
+
+  // Expected to only work when a url query param is defined
+  return new Response(null, { status: 400 });
+}
+
+export default handler;