// canonical
        final String canonicalUrl = getCanonicalUrl(responseData, document);
        if (canonicalUrl != null && !canonicalUrl.equals(responseData.getUrl()) && isValidUrl(canonicalUrl)
                && isValidCanonicalUrl(responseData.getUrl(), canonicalUrl)) {
            final Set<RequestData> childUrlSet = new HashSet<>();

  var result = lazyCacheControl
  if (result == null) {
    result = CacheControl.parse(headers)
    lazyCacheControl = result
  }
  return result
}

internal fun canonicalUrl(url: String): String {
  // Silently replace web socket URLs with HTTP URLs.
  return when {
    url.startsWith("ws:", ignoreCase = true) -> {
      "http:${url.substring(3)}"
    }

 */
package okhttp3

import java.net.URL
import kotlin.reflect.KClass
import kotlin.reflect.cast
import okhttp3.Headers.Companion.headersOf
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.internal.canonicalUrl
import okhttp3.internal.commonAddHeader
import okhttp3.internal.commonCacheControl
import okhttp3.internal.commonDelete
import okhttp3.internal.commonEmptyRequestBody
import okhttp3.internal.commonGet

	// Get canonical URI.
	canonicalURI := s3utils.EncodePath(req.URL.Path)

	// Get canonical request.
	// canonicalRequest =
	//  <HTTPMethod>\n
	//  <CanonicalURI>\n
	//  <CanonicalQueryString>\n
	//  <CanonicalHeaders>\n
	//  <SignedHeaders>\n
	//  <HashedPayload>
	//
	canonicalRequest := strings.Join([]string{
		req.Method,
		canonicalURI,
		req.URL.RawQuery,
		canonicalHeaders,

	}
	sort.Strings(headers)
	return strings.Join(headers, ";")
}

// getCanonicalRequest generate a canonical request of style
//
// canonicalRequest =
//
//	<HTTPMethod>\n
//	<CanonicalURI>\n
//	<CanonicalQueryString>\n
//	<CanonicalHeaders>\n
//	<SignedHeaders>\n
//	<HashedPayload>
func getCanonicalRequest(extractedSignedHeaders http.Header, payload, queryStr, urlPath, method string) string {