import java.security.Signature
import java.security.cert.X509Certificate
import java.security.interfaces.ECPublicKey
import java.security.interfaces.RSAPrivateKey
import java.security.interfaces.RSAPublicKey
import java.security.spec.PKCS8EncodedKeySpec
import java.util.UUID
import java.util.concurrent.TimeUnit
import okhttp3.internal.canParseAsIpAddress
import okhttp3.tls.internal.der.AlgorithmIdentifier

    // we rule out characters that would cause problems in host headers.
    if (c <= '\u001f' || c >= '\u007f') {
      return true
    }
    // Check for the characters mentioned in the WHATWG Host parsing spec:
    // U+0000, U+0009, U+000A, U+000D, U+0020, "#", "%", "/", ":", "?", "@", "[", "\", and "]"
    // (excluding the characters covered above).
    if (" #%/:?@[\\]".indexOf(c) != -1) {
      return true
    }
  }

## Ztunnel Shutdown/Upgrade/Restart

This could be upgrading to a new version, or changing some part of the DaemonSet spec, etc.

### Ztunnel Shutdown Requirements

Our high level requirement is to minimize traffic disruption.

However, because Ztunnel operates only at Layer 4, we are in a tricky position:

     * rules vary per-component: for example, '?' may be identity-encoded in a fragment, but must be
     * percent-encoded in a path.
     *
     * See https://url.spec.whatwg.org/#percent-encoded-bytes
     */
    fun newInstance(): UrlComponentEncodingTester {
      return UrlComponentEncodingTester()
        .allAscii(Encoding.IDENTITY)
        .nonPrintableAscii(Encoding.PERCENT)

	paxUid      = "uid"
	paxGid      = "gid"
	paxUname    = "uname"
	paxGname    = "gname"
	paxMtime    = "mtime"
	paxAtime    = "atime"
	paxCtime    = "ctime"   // Removed from later revision of PAX spec, but was valid
	paxCharset  = "charset" // Currently unused
	paxComment  = "comment" // Currently unused

	paxSchilyXattr = "SCHILY.xattr."

	// Keywords for GNU sparse files in a PAX extended header.

		controllers.WithGenericReconciler(s.reconcile),
		controllers.WithMaxAttempts(5),
	)
	// We only need to handle pods on our node
	s.pods = kclient.NewFiltered[*corev1.Pod](kubeClient, kclient.Filter{FieldSelector: "spec.nodeName=" + NodeName})
	s.pods.AddEventHandler(controllers.FromEventHandler(func(o controllers.Event) {
		s.queue.Add(o)
	}))

	// Namespaces could be anything though, so we watch all of those
	//

	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
	github.com/onsi/ginkgo/v2 v2.20.2 // indirect
	github.com/opencontainers/go-digest v1.0.0 // indirect
	github.com/opencontainers/image-spec v1.1.0 // indirect
	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
	github.com/pkg/errors v0.9.1 // indirect

    checkNotNull(domain);
    if (isEmpty()) {
      return ImmutableSortedSet.of();
    }
    Range<C> span = span().canonical(domain);
    if (!span.hasLowerBound()) {
      // according to the spec of canonical, neither this ImmutableRangeSet nor
      // the range have a lower bound
      throw new IllegalArgumentException(
          "Neither the DiscreteDomain nor this range set are bounded below");

///

### Checking the current `root_path`

You can get the current `root_path` used by your application for each request, it is part of the `scope` dictionary (that's part of the ASGI spec).

Here we are including it in the message just for demonstration purposes.

{* ../../docs_src/behind_a_proxy/tutorial001.py hl[8] *}

Then, if you start Uvicorn with:

<div class="termy">

```console

}

// compareSignatureV4 returns true if and only if both signatures
// are equal. The signatures are expected to be HEX encoded strings
// according to the AWS S3 signature V4 spec.
func compareSignatureV4(sig1, sig2 string) bool {
	// The CTC using []byte(str) works because the hex encoding
	// is unique for a sequence of bytes. See also compareSignatureV2.