Initial commit

routes/api/git/stacks/[id]/webhook/+server.ts

@@ -0,0 +1,97 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { getGitStack } from '$lib/server/db';
+import { deployGitStack } from '$lib/server/git';
+import crypto from 'node:crypto';
+
+function verifySignature(payload: string, signature: string | null, secret: string): boolean {
+	if (!signature) return false;
+
+	// Support both GitHub and GitLab webhook signatures
+	// GitHub: sha256=<hash>
+	// GitLab: just the token value in X-Gitlab-Token header
+
+	if (signature.startsWith('sha256=')) {
+		const expectedSignature = 'sha256=' + crypto
+			.createHmac('sha256', secret)
+			.update(payload)
+			.digest('hex');
+		return crypto.timingSafeEqual(
+			Buffer.from(signature),
+			Buffer.from(expectedSignature)
+		);
+	}
+
+	// GitLab uses X-Gitlab-Token which should match exactly
+	return signature === secret;
+}
+
+export const POST: RequestHandler = async ({ params, request }) => {
+	try {
+		const id = parseInt(params.id);
+		if (isNaN(id)) {
+			return json({ error: 'Invalid stack ID' }, { status: 400 });
+		}
+
+		const gitStack = await getGitStack(id);
+		if (!gitStack) {
+			return json({ error: 'Git stack not found' }, { status: 404 });
+		}
+
+		if (!gitStack.webhookEnabled) {
+			return json({ error: 'Webhook is not enabled for this stack' }, { status: 403 });
+		}
+
+		// Verify webhook secret if set
+		if (gitStack.webhookSecret) {
+			const payload = await request.text();
+			const githubSignature = request.headers.get('x-hub-signature-256');
+			const gitlabToken = request.headers.get('x-gitlab-token');
+
+			const signature = githubSignature || gitlabToken;
+
+			if (!verifySignature(payload, signature, gitStack.webhookSecret)) {
+				return json({ error: 'Invalid webhook signature' }, { status: 401 });
+			}
+		}
+
+		// Deploy the git stack (syncs and deploys only if there are changes)
+		const result = await deployGitStack(id, { force: false });
+		return json(result);
+	} catch (error: any) {
+		console.error('Webhook error:', error);
+		return json({ success: false, error: error.message }, { status: 500 });
+	}
+};
+
+// Also support GET for simple polling/manual triggers
+export const GET: RequestHandler = async ({ params, url }) => {
+	try {
+		const id = parseInt(params.id);
+		if (isNaN(id)) {
+			return json({ error: 'Invalid stack ID' }, { status: 400 });
+		}
+
+		const gitStack = await getGitStack(id);
+		if (!gitStack) {
+			return json({ error: 'Git stack not found' }, { status: 404 });
+		}
+
+		if (!gitStack.webhookEnabled) {
+			return json({ error: 'Webhook is not enabled for this stack' }, { status: 403 });
+		}
+
+		// Verify secret via query parameter for GET requests
+		const secret = url.searchParams.get('secret');
+		if (gitStack.webhookSecret && secret !== gitStack.webhookSecret) {
+			return json({ error: 'Invalid webhook secret' }, { status: 401 });
+		}
+
+		// Deploy the git stack (syncs and deploys only if there are changes)
+		const result = await deployGitStack(id, { force: false });
+		return json(result);
+	} catch (error: any) {
+		console.error('Webhook GET error:', error);
+		return json({ success: false, error: error.message }, { status: 500 });
+	}
+};