feat: Gitea webhook with HMAC-SHA256 auth, agent label routing, auto-close issues

Made-with: Cursor

dist/server.js

@@ -40,6 +40,7 @@ const express_1 = __importDefault(require("express"));
 const cors_1 = __importDefault(require("cors"));
 const fs = __importStar(require("fs"));
 const path = __importStar(require("path"));
+const crypto = __importStar(require("crypto"));
 const child_process_1 = require("child_process");
 const job_store_1 = require("./job-store");
 const agent_runner_1 = require("./agent-runner");
@@ -157,19 +158,25 @@ app.get('/api/jobs', (req, res) => {
     const limit = parseInt(req.query.limit || '20', 10);
     res.json((0, job_store_1.listJobs)(limit));
 });
-// Gitea webhook endpoint — triggers agent from a push/issue event
-app.post('/webhook/gitea', (req, res) => {
+// Gitea webhook endpoint — triggers agent from an issue event
+// Must use raw body for HMAC verification — register before express.json()
+app.post('/webhook/gitea', express_1.default.raw({ type: 'application/json' }), (req, res) => {
     const event = req.headers['x-gitea-event'];
-    const body = req.body;
-    // Verify secret if configured
+    const rawBody = req.body;
+    // Verify HMAC-SHA256 signature
     const webhookSecret = process.env.WEBHOOK_SECRET;
     if (webhookSecret) {
         const sig = req.headers['x-gitea-signature'];
-        if (!sig || sig !== webhookSecret) {
+        const expected = crypto
+            .createHmac('sha256', webhookSecret)
+            .update(rawBody)
+            .digest('hex');
+        if (!sig || !crypto.timingSafeEqual(Buffer.from(sig), Buffer.from(expected))) {
             res.status(401).json({ error: 'Invalid webhook signature' });
             return;
         }
     }
+    const body = JSON.parse(rawBody.toString('utf8'));
     let task = null;
     let agentName = 'Coder';
     let repo;
@@ -183,13 +190,17 @@ app.post('/webhook/gitea', (req, res) => {
         else if (labels.includes('agent:marketing')) {
             agentName = 'Marketing';
         }
-        else {
+        else if (labels.includes('agent:coder')) {
             agentName = 'Coder';
         }
-        task = `Resolve this GitHub issue:\n\nTitle: ${issue.title}\n\nDescription:\n${issue.body || '(no description)'}`;
+        else {
+            // No agent label — ignore
+            res.json({ ignored: true, reason: 'no agent label on issue' });
+            return;
+        }
+        task = `You have been assigned to resolve a Gitea issue in the repo ${repo}.\n\nIssue #${issue.number}: ${issue.title}\n\nDescription:\n${issue.body || '(no description)'}\n\nWhen done, close the issue by calling gitea_close_issue.`;
     }
     else if (event === 'push') {
-        // Optionally trigger on push — useful for CI-style automation
         res.json({ ignored: true, reason: 'push events not auto-processed' });
         return;
     }