dsh 0.2.0-rc.2: in-container update (experimental channel), path-agnostic compose, upstream patches adapted to 0.1.x/0.2.x

upstream/container/control-plane/services/outbound-proxy/lib/readiness.mjs

@@ -0,0 +1,29 @@
+import { request } from 'node:http'
+import { ProxyTransportError } from './transport.mjs'
+
+export async function probeProxyEntry(port, { timeoutMs = 2_000 } = {}) {
+  await new Promise((resolve, reject) => {
+    const probe = request({
+      host: '127.0.0.1',
+      port,
+      method: 'GET',
+      path: '/__dsh_outbound_proxy_readiness__',
+      headers: { connection: 'close' },
+      agent: false,
+    }, response => {
+      response.resume()
+      response.once('end', () => {
+        if (response.statusCode === 400 && response.headers['x-dsh-proxy-error'] === 'INVALID_PROXY_REQUEST') resolve()
+        else reject(new ProxyTransportError('outbound proxy readiness response is invalid', {
+          code: 'PROXY_READINESS_FAILED',
+        }))
+      })
+    })
+    const timer = setTimeout(() => probe.destroy(new ProxyTransportError('outbound proxy readiness timed out', {
+      code: 'PROXY_READINESS_FAILED',
+    })), timeoutMs)
+    probe.once('close', () => clearTimeout(timer))
+    probe.once('error', reject)
+    probe.end()
+  })
+}