chore: Add undici package and update health check service to utilize undici's Agent for improved HTTP probing

apps/api/package.json

@@ -26,6 +26,7 @@
     "p-limit": "^6.2.0",
     "p-queue": "^8.1.0",
     "toad-scheduler": "^4.0.1",
+    "undici": "^8.5.0",
     "zod": "^4.2.0"
   },
   "devDependencies": {

apps/api/src/services/health-check-service.ts

@@ -1,4 +1,5 @@
 import { connect } from "node:net";
+import { Agent } from "undici";
 import type { Db } from "@cfdm/db";
 import { repos } from "@cfdm/db";
 import type { HealthCheckTarget, IpHealthState } from "@cfdm/shared";
@@ -64,14 +65,33 @@ async function httpProbe(
 ): Promise<ProbeResult> {
   const started = Date.now();
   const path = target.path?.trim() || "/";
-  const url = `http://${ip}${path.startsWith("/") ? path : `/${path}`}`;
+  const pathWithSlash = path.startsWith("/") ? path : `/${path}`;
+  const port = target.port ?? 80;
   const hostHeader = target.hostname || ip;
+  const useTls = port === 443;
+  // For HTTPS probing against a raw IP, set SNI/Host so TLS handshake and vhost routing work.
+  const authorityHost = target.hostname || ip;
+  const url = useTls
+    ? `https://${authorityHost}${pathWithSlash}`
+    : `http://${ip}${pathWithSlash}`;
+  // Custom dispatcher for HTTPS-to-IP: connect to the literal IP, but present hostname via SNI.
+  const dispatcher =
+    useTls && target.hostname
+      ? new Agent({
+          connect: {
+            servername: target.hostname,
+            rejectUnauthorized: false,
+          },
+        })
+      : undefined;
   try {
     const response = await fetch(url, {
       method: "GET",
       headers: { Host: hostHeader },
       signal: AbortSignal.timeout(timeoutMs),
       redirect: "manual",
+      // @ts-expect-error undici dispatcher option is not in fetch types
+      dispatcher,
     });
     const latency = Date.now() - started;
     if (target.expected_status != null) {

pnpm-lock.yaml

@@ -66,6 +66,9 @@ importers:
       toad-scheduler:
         specifier: ^4.0.1
         version: 4.0.1
+      undici:
+        specifier: ^8.5.0
+        version: 8.5.0
       zod:
         specifier: ^4.2.0
         version: 4.4.3
@@ -3763,6 +3766,10 @@ packages:
   [email protected]:
     resolution: {integrity: sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==}
 
+  [email protected]:
+    resolution: {integrity: sha512-xamtWoB1EshgjpmlXd7GGm2VfdDtw1+rD8uhry8pSNW3If6S8E0m2T2+orSKeZXEn/aPJMviCpDBA65WJt8zhg==}
+    engines: {node: '>=22.19.0'}
+
   [email protected]:
     resolution: {integrity: sha512-0Mqk3AT2TZCXWKdcoaufeXNukv2mTrEZExeXlHIOZXdqYoHHr4n51pymnwV8x2BOVxwXbK2HLlI7usrqMpycdg==}
     engines: {node: ^20.19.0 || >=22.12.0}
@@ -7095,6 +7102,8 @@ snapshots:
 
   [email protected]: {}
 
+  [email protected]: {}
+
   [email protected]:
     dependencies:
       '@jridgewell/remapping': 2.3.5