init commit,

99_references/supabase-examples/edge-functions/supabase/functions/location/README.md

@@ -0,0 +1,19 @@
+# Get User Location
+
+This example shows how you can get user location based on the IP provided in X-Forwarded-For header in a request.
+
+You will need to signup for an account in https://ipinfo.io and provide it as `IPINFO_TOKEN` environment variable ([learn how to set environment variables to your functions](https://supabase.com/docs/guides/functions#secrets-and-environment-variables)).
+
+## Develop locally
+
+```bash
+supabase functions serve --env-file ./supabase/.env.local --no-verify-jwt
+```
+
+Navigate to http://localhost:54321/functions/v1/location
+
+## Deploy
+
+```bash
+supabase functions deploy location --no-verify-jwt
+```

99_references/supabase-examples/edge-functions/supabase/functions/location/index.ts

@@ -0,0 +1,28 @@
+// Follow this setup guide to integrate the Deno language server with your editor:
+// https://deno.land/manual/getting_started/setup_your_environment
+// This enables autocomplete, go to definition, etc.
+
+function ips(req: Request) {
+  return req.headers.get('x-forwarded-for')?.split(/\s*,\s*/)
+}
+
+Deno.serve(async (req) => {
+  const clientIps = ips(req) || ['']
+  const res = await fetch(
+    `https://ipinfo.io/${clientIps[0]}?token=${Deno.env.get('IPINFO_TOKEN')}`,
+    {
+      headers: { 'Content-Type': 'application/json' },
+    }
+  )
+  if (res.ok) {
+    const { city, country } = await res.json()
+
+    return new Response(JSON.stringify(`You're accessing from ${city}, ${country}`), {
+      headers: { 'Content-Type': 'application/json' },
+    })
+  } else {
+    return new Response(await res.text(), {
+      status: 400,
+    })
+  }
+})