feat: proxy chillhop requests and add turnstile to account creation

.env.example

@@ -9,3 +9,7 @@ ORIGIN=""
 # For production use 32 characters and generated with high entropy
 # https://www.better-auth.com/docs/installation
 BETTER_AUTH_SECRET=""
+
+# Cloudflare Turnstile
+PUBLIC_TURNSTILE_SITE_KEY=""
+TURNSTILE_SECRET_KEY=""

bun.lock

@@ -25,6 +25,7 @@
         "svelte": "^5.0.0",
         "svelte-check": "^4.0.0",
         "svelte-sonner": "^0.3.28",
+        "svelte-turnstile": "^0.11.0",
         "tailwind-merge": "^3.2.0",
         "tailwind-variants": "^1.0.0",
         "tailwindcss": "^3.4.17",
@@ -810,6 +811,8 @@
 
     "svelte-toolbelt": ["svelte-toolbelt@0.7.1", "", { "dependencies": { "clsx": "^2.1.1", "runed": "^0.23.2", "style-to-object": "^1.0.8" }, "peerDependencies": { "svelte": "^5.0.0" } }, "sha512-HcBOcR17Vx9bjaOceUvxkY3nGmbBmCBBbuWLLEWO6jtmWH8f/QoWmbyUfQZrpDINH39en1b8mptfPQT9VKQ1xQ=="],
 
+    "svelte-turnstile": ["svelte-turnstile@0.11.0", "", { "dependencies": { "turnstile-types": "^1.2.3" }, "peerDependencies": { "svelte": "^3.58.0 || ^4.0.0 || ^5.0.0" } }, "sha512-2LFklx9JVsR3fJ7e3fGG1HEAWWEqRq1WfNaVrKgZJ+pzfY2NColiH+wH0kK2yX3DrcGLiJ9vBeTyiLFWotKpLA=="],
+
     "tabbable": ["tabbable@6.4.0", "", {}, "sha512-05PUHKSNE8ou2dwIxTngl4EzcnsCDZGJ/iCLtDflR/SHB/ny14rXc+qU5P4mG9JkusiV7EivzY9Mhm55AzAvCg=="],
 
     "tailwind-merge": ["tailwind-merge@3.5.0", "", {}, "sha512-I8K9wewnVDkL1NTGoqWmVEIlUcB9gFriAEkXkfCjX5ib8ezGxtR3xD7iZIxrfArjEsH7F1CHD4RFUtxefdqV/A=="],
@@ -844,6 +847,8 @@
 
     "tunnel-agent": ["tunnel-agent@0.6.0", "", { "dependencies": { "safe-buffer": "^5.0.1" } }, "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w=="],
 
+    "turnstile-types": ["turnstile-types@1.2.3", "", {}, "sha512-EDjhDB9TDwda2JRbhzO/kButPio3JgrC3gXMVAMotxldybTCJQVMvPNJ89rcAiN9vIrCb2i1E+VNBCqB8wue0A=="],
+
     "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
 
     "undici": ["undici@7.24.4", "", {}, "sha512-BM/JzwwaRXxrLdElV2Uo6cTLEjhSb3WXboncJamZ15NgUURmvlXvxa6xkwIOILIjPNo9i8ku136ZvWV0Uly8+w=="],

package.json

@@ -44,6 +44,7 @@
     "svelte": "^5.0.0",
     "svelte-check": "^4.0.0",
     "svelte-sonner": "^0.3.28",
+    "svelte-turnstile": "^0.11.0",
     "tailwind-merge": "^3.2.0",
     "tailwind-variants": "^1.0.0",
     "tailwindcss": "^3.4.17",

src/lib/auth-client.ts

@@ -7,11 +7,12 @@ import type { auth } from '$lib/server/auth';
 const accountNumberClient = {
   id: 'account-number',
   getActions: ($fetch) => ({
-    createAccount: async (name?: string) =>
+    createAccount: async (name?: string, turnstileToken?: string) =>
       $fetch('/create-account', {
         method: 'POST',
         body: {
           name,
+          turnstileToken,
         },
       }),
     signInAccountNumber: async (accountNumber: string) =>

src/lib/components/app/auth-dialog.svelte

@@ -13,6 +13,9 @@
   import Plus from '@lucide/svelte/icons/plus';
   import Loader2 from '@lucide/svelte/icons/loader-2';
   import type { Passkey } from '@better-auth/passkey';
+  import { Turnstile } from 'svelte-turnstile';
+  import { dev } from '$app/environment';
+  import { env as publicEnv } from '$env/dynamic/public';
 
   const session = authClient.useSession();
 
@@ -27,6 +30,11 @@
   let loadedPasskeysForUserId = $state<string | null>(null);
   let authScreen = $state<'login' | 'create'>('login');
   let passkeyName = $state('');
+  let turnstileToken = $state('');
+  let resetTurnstile = $state<(() => void) | undefined>();
+  const turnstileSiteKey = $derived(
+    dev ? '1x00000000000000000000AA' : (publicEnv.PUBLIC_TURNSTILE_SITE_KEY ?? '')
+  );
 
   const loadPasskeys = async () => {
     if (!user) {
@@ -84,18 +92,51 @@
       }
     );
 
-  const createAccount = () =>
-    runAuthAction(
+  const clearTurnstile = () => {
+    turnstileToken = '';
+    resetTurnstile?.();
+  };
+
+  const handleTurnstileCallback = (
+    event: CustomEvent<{ token: string; preClearanceObtained: boolean }>
+  ) => {
+    turnstileToken = event.detail.token;
+    authMessage = '';
+  };
+
+  const handleTurnstileError = () => {
+    clearTurnstile();
+    authMessage = 'Turnstile verification failed. Please try again.';
+  };
+
+  const handleTurnstileExpired = () => {
+    clearTurnstile();
+    authMessage = 'Turnstile check expired. Please try again.';
+  };
+
+  const createAccount = async () => {
+    if (!turnstileToken) {
+      authMessage = 'Please complete the Turnstile check before creating an account.';
+      return;
+    }
+
+    await runAuthAction(
       'create-account',
-      () => authClient.createAccount(name),
+      () => authClient.createAccount(name, turnstileToken),
       'Account creation failed',
       async () => {
         await session.get().refetch();
         name = '';
         authScreen = 'login';
+        clearTurnstile();
       }
     );
 
+    if (busyAction !== 'create-account') {
+      clearTurnstile();
+    }
+  };
+
   const signInWithPasskey = () =>
     runAuthAction(
       'passkey-sign-in',
@@ -382,10 +423,18 @@
             />
           </div>
 
+          <Turnstile
+            siteKey={turnstileSiteKey}
+            bind:reset={resetTurnstile}
+            on:callback={handleTurnstileCallback}
+            on:error={handleTurnstileError}
+            on:expired={handleTurnstileExpired}
+          />
+
           <Button
             type="button"
             onclick={createAccount}
-            disabled={busyAction === 'create-account' || !name}
+            disabled={busyAction === 'create-account' || !name || !turnstileToken}
             class="w-full disabled:opacity-50"
           >
             {#if busyAction === 'create-account'}

src/lib/server/auth.ts

@@ -21,6 +21,58 @@ const getAnonymousDisplayName = (name?: string | null) => {
   return trimmedName ? trimmedName : 'Chillhop listener';
 };
 
+type TurnstileVerifyResult = {
+  success: boolean;
+  hostname?: string;
+  ['error-codes']?: string[];
+};
+
+const getClientIpAddress = () => {
+  const headers = getRequestEvent().request.headers;
+  return headers.get('CF-Connecting-IP') ?? headers.get('X-Forwarded-For') ?? undefined;
+};
+
+const verifyTurnstileToken = async (token: string) => {
+  if (!env.TURNSTILE_SECRET_KEY) {
+    throw new APIError('INTERNAL_SERVER_ERROR', {
+      message: 'Turnstile secret key is not configured',
+    });
+  }
+
+  const verificationBody = new FormData();
+  verificationBody.set('secret', env.TURNSTILE_SECRET_KEY);
+  verificationBody.set('response', token);
+
+  const remoteIp = getClientIpAddress();
+  if (remoteIp) {
+    verificationBody.set('remoteip', remoteIp);
+  }
+
+  verificationBody.set('idempotency_key', crypto.randomUUID());
+
+  const response = await fetch('https://challenges.cloudflare.com/turnstile/v0/siteverify', {
+    method: 'POST',
+    body: verificationBody,
+  });
+
+  if (!response.ok) {
+    throw new APIError('BAD_REQUEST', {
+      message: 'Turnstile verification failed. Please try again.',
+    });
+  }
+
+  const result = (await response.json()) as TurnstileVerifyResult;
+
+  if (!result.success) {
+    throw new APIError('BAD_REQUEST', {
+      message:
+        result['error-codes']?.includes('timeout-or-duplicate')
+          ? 'Turnstile check expired. Please try again.'
+          : 'Please complete the Turnstile check before creating an account.',
+    });
+  }
+};
+
 const createAnonymousSession = async (ctx: any, name?: string | null) => {
   const user = await ctx.context.internalAdapter.createUser({
     email: generateOpaqueIdentifier(),
@@ -65,9 +117,13 @@ const accountNumber = () =>
           method: 'POST',
           body: z.object({
             name: z.string().trim().max(100).optional(),
+            turnstileToken: z.string().min(1),
           }),
         },
-        async (ctx) => ctx.json(await createAnonymousSession(ctx, ctx.body.name)),
+        async (ctx) => {
+          await verifyTurnstileToken(ctx.body.turnstileToken);
+          return ctx.json(await createAnonymousSession(ctx, ctx.body.name));
+        },
       ),
       signInAccountNumber: createAuthEndpoint(
         '/sign-in/account-number',

src/lib/stations/chillhop.ts

@@ -7,7 +7,7 @@ export async function getChillhopStation(id: number): Promise<Song[]> {
   const finalData = data.map(song => ({
     artists: song.artists,
     title: song.title,
-    endpoint: `https://stream.chillhop.com/mp3/${song.fileId}`,
+    endpoint: `/api/chstream/${song.fileId}`,
     image: song.image,
     label: 'Chillhop Music',
     spotifyId: song.spotifyId,

src/routes/api/chstream/[fileId]/+server.ts

@@ -0,0 +1,58 @@
+// overengineered proxy brought to you by codex.
+
+import type { RequestHandler } from '@sveltejs/kit';
+
+const FILE_ID_PATTERN = /^[A-Za-z0-9_-]+$/;
+
+function isValidFileId(fileId: string) {
+  return FILE_ID_PATTERN.test(fileId);
+}
+
+export const GET: RequestHandler = async ({ params, request, fetch }) => {
+  const { fileId } = params;
+
+  if (!fileId || !isValidFileId(fileId)) {
+    return new Response('Invalid file ID', { status: 400 });
+  }
+
+  const upstreamHeaders = new Headers();
+  const range = request.headers.get('range');
+
+  if (range) {
+    upstreamHeaders.set('range', range);
+  }
+
+  const upstreamResponse = await fetch(`https://stream.chillhop.com/mp3/${fileId}`, {
+    headers: upstreamHeaders,
+  });
+
+  if (!upstreamResponse.ok && upstreamResponse.status !== 206) {
+    return new Response('File not found', { status: upstreamResponse.status === 404 ? 404 : 502 });
+  }
+
+  const responseHeaders = new Headers();
+  const headersToForward = [
+    'content-type',
+    'content-length',
+    'content-range',
+    'accept-ranges',
+    'etag',
+    'last-modified',
+    'cache-control',
+  ];
+
+  for (const header of headersToForward) {
+    const value = upstreamResponse.headers.get(header);
+    if (value) {
+      responseHeaders.set(header, value);
+    }
+  }
+
+  responseHeaders.set('Content-Disposition', `inline; filename="${fileId}.mp3"`);
+
+  return new Response(upstreamResponse.body, {
+    status: upstreamResponse.status,
+    statusText: upstreamResponse.statusText,
+    headers: responseHeaders,
+  });
+};

src/routes/demo/+page.svelte

@@ -1,5 +0,0 @@
-<script lang="ts">
-  import { resolve } from '$app/paths';
-</script>
-
-<a href={resolve('/demo/better-auth')}>better-auth</a>

src/routes/demo/better-auth/+page.server.ts

@@ -1,21 +0,0 @@
-import { redirect } from '@sveltejs/kit';
-import type { Actions } from './$types';
-import type { PageServerLoad } from './$types';
-
-export const load: PageServerLoad = (event) => {
-  if (!event.locals.user) {
-    return redirect(302, '/demo/better-auth/login');
-  }
-  return { user: event.locals.user };
-};
-
-export const actions: Actions = {
-  signOut: async (event) => {
-    const { auth } = event.locals;
-
-    await auth.api.signOut({
-      headers: event.request.headers,
-    });
-    return redirect(302, '/demo/better-auth/login');
-  },
-};

src/routes/demo/better-auth/+page.svelte

@@ -1,35 +0,0 @@
-<script lang="ts">
-  import { authClient } from '$lib';
-  import { enhance } from '$app/forms';
-  import type { PageServerData } from './$types';
-
-  let { data }: { data: PageServerData } = $props();
-  let passkeyMessage = $state('');
-  let addingPasskey = $state(false);
-
-  const addPasskey = async () => {
-    addingPasskey = true;
-    passkeyMessage = '';
-
-    const result = await authClient.passkey.addPasskey({
-      name: 'Primary passkey',
-      authenticatorAttachment: 'platform',
-    });
-
-    addingPasskey = false;
-    passkeyMessage = result.error
-      ? result.error.message || 'Failed to add passkey'
-      : 'Passkey added to your account.';
-  };
-</script>
-
-<h1>Hi, {data.user.name}!</h1>
-<p>Your user ID is {data.user.id}.</p>
-<p>Your account number is {data.user.accountNumber}.</p>
-<button onclick={addPasskey} disabled={addingPasskey}>
-  {addingPasskey ? 'Waiting for passkey...' : 'Add a passkey'}
-</button>
-<p>{passkeyMessage}</p>
-<form method="post" action="?/signOut" use:enhance>
-  <button>Sign out</button>
-</form>

src/routes/demo/better-auth/login/+page.server.ts

@@ -1,58 +0,0 @@
-import { fail, redirect } from '@sveltejs/kit';
-import type { Actions, PageServerLoad } from './$types';
-
-import { APIError } from 'better-auth';
-
-const getErrorMessage = (error: unknown, fallback: string) => {
-  if (error instanceof APIError) return error.message || fallback;
-  if (error instanceof Error) return error.message || fallback;
-  if (typeof error === 'object' && error && 'message' in error && typeof error.message === 'string') {
-    return error.message || fallback;
-  }
-  return fallback;
-};
-
-export const load: PageServerLoad = (event) => {
-  if (event.locals.user) {
-    return redirect(302, '/demo/better-auth');
-  }
-  return {};
-};
-
-export const actions: Actions = {
-  signInAccountNumber: async (event) => {
-    const { auth } = event.locals;
-
-    const formData = await event.request.formData();
-    const accountNumber = formData.get('accountNumber')?.toString().replace(/\D/g, '') ?? '';
-
-    try {
-      await auth.api.signInAccountNumber({
-        body: {
-          accountNumber,
-        },
-      });
-    } catch (error) {
-      console.error('Demo Better Auth account number sign-in failed', { accountNumber, error });
-      return fail(error instanceof APIError ? 400 : 500, {
-        message: getErrorMessage(error, 'Account number sign-in failed'),
-      });
-    }
-
-    return redirect(302, '/demo/better-auth');
-  },
-  createAccount: async (event) => {
-    const { auth } = event.locals;
-
-    try {
-      await auth.api.signInAnonymous();
-    } catch (error) {
-      console.error('Demo Better Auth account creation failed', { error });
-      return fail(error instanceof APIError ? 400 : 500, {
-        message: getErrorMessage(error, 'Account creation failed'),
-      });
-    }
-
-    return redirect(302, '/demo/better-auth');
-  },
-};

src/routes/demo/better-auth/login/+page.svelte

@@ -1,43 +0,0 @@
-<script lang="ts">
-  import { goto } from '$app/navigation';
-  import { enhance } from '$app/forms';
-  import { authClient } from '$lib';
-  import type { ActionData } from './$types';
-
-  let { form }: { form: ActionData } = $props();
-  let passkeyError = $state('');
-  let signingInWithPasskey = $state(false);
-
-  const signInWithPasskey = async () => {
-    signingInWithPasskey = true;
-    passkeyError = '';
-
-    const result = await authClient.signIn.passkey({
-      autoFill: true,
-    });
-
-    signingInWithPasskey = false;
-
-    if (result.error) {
-      passkeyError = result.error.message || 'Passkey sign-in failed';
-      return;
-    }
-
-    await goto('/demo/better-auth');
-  };
-</script>
-
-<h1>Account Login</h1>
-<form method="post" action="?/signInAccountNumber" use:enhance>
-  <label>
-    Account number
-    <input name="accountNumber" inputmode="numeric" maxlength="16" autocomplete="one-time-code" />
-  </label>
-  <button>Sign in with account number</button>
-  <button formaction="?/createAccount">Create account number</button>
-</form>
-<p style="color: red">{form?.message ?? ''}</p>
-<button onclick={signInWithPasskey} disabled={signingInWithPasskey}>
-  {signingInWithPasskey ? 'Waiting for passkey...' : 'Sign in with passkey'}
-</button>
-<p style="color: red">{passkeyError}</p>