migrate from github

src/http/probes.js

@@ -0,0 +1,45 @@
+const { writeJson } = require('./helpers');
+
+function buildReadinessState(isDraining, redisClient) {
+  const ready = !isDraining && !!redisClient;
+  return {
+    ready,
+    redisState: redisClient ? 'connected' : 'disconnected',
+    detail: isDraining ? 'server is draining' : undefined
+  };
+}
+
+function handleProbeRequest(pathname, res, { isDraining, redisClient }) {
+  if (pathname === '/livez') {
+    writeJson(res, 200, { status: 'ok' });
+    return true;
+  }
+
+  const state = buildReadinessState(isDraining, redisClient);
+
+  if (pathname === '/readyz') {
+    writeJson(res, state.ready ? 200 : 503, {
+      status: state.ready ? 'ok' : 'not_ready',
+      redis: state.redisState,
+      detail: state.detail
+    });
+    return true;
+  }
+
+  if (pathname === '/health') {
+    writeJson(res, 200, {
+      status: 'ok',
+      redis: state.redisState,
+      persistence: 'custom',
+      ready: state.ready ? 'true' : 'false',
+      detail: state.detail
+    });
+    return true;
+  }
+
+  return false;
+}
+
+module.exports = {
+  handleProbeRequest
+};