feat: add contact form server-side.

Author: zicklag

server-side/contact.ts

@@ -0,0 +1,56 @@
+import { AutoRouter, cors, error } from 'npm:itty-router';
+
+const { preflight, corsify } = cors();
+const router = AutoRouter({
+  before: [preflight],
+  finally: [corsify],
+});
+
+const contactWebhook = Deno.env.get('CONTACT_WEBHOOK');
+if (!contactWebhook) throw 'Missing CONTACT_WEBHOOK env var';
+const turnstileSecret = Deno.env.get('TURNSTILE_SECRET');
+if (!turnstileSecret) throw 'Missing TURNSTILE_SECRET env var';
+
+router.post('/contact', async ({ formData }) => {
+  const data = await formData();
+  const cloudflareToken = data.get('cf-turnstile-response');
+  if (!cloudflareToken) return error(400, 'Cloudflare captcha token missing.');
+  const name = data.get('name');
+  if (!name) return error(400, 'Missing name field');
+  const email = data.get('email');
+  if (!email) return error(400, 'Missing email field');
+  const message = data.get('message');
+  if (!message) return error(400, 'Missing message field');
+
+  const turnstileData = new FormData();
+  turnstileData.append('secret', turnstileSecret);
+  turnstileData.append('response', cloudflareToken);
+  // turnstileData.append("remoteip", ip);
+
+  const url = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
+  const result = await fetch(url, {
+    body: turnstileData,
+    method: 'POST',
+  });
+  if (!result.ok) {
+    console.error('Error validating turnstile challenge:', await result.text());
+    return error(400, 'Invalid turnstile challenge response');
+  }
+
+  const response = await fetch(contactWebhook, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({
+      text: `New message from ${name}:${email} >> ${message}`,
+    }),
+  });
+  if (response.ok) {
+    return new Response(undefined, { status: 200 });
+  } else {
+    return new Response(undefined, { status: 500 });
+  }
+});
+
+Deno.serve(router.fetch);

server-side/deno.json

@@ -0,0 +1,3 @@
+{ 
+  "nodeModulesDir": "auto"
+}