package okhttp3.internal

import okhttp3.internal.idn.IDNA_MAPPING_TABLE
import okhttp3.internal.idn.Punycode
import okio.Buffer

/**
 * Quick and dirty pattern to differentiate IP addresses from hostnames. This is an approximation
 * of Android's private InetAddress#isNumeric API.
 *
 * This matches IPv6 addresses as a hex string containing at least one colon, and possibly

			}
		}
	}
	return ""
}

// Hostnames - returns list of unique hostnames
func (l EndpointServerPools) Hostnames() []string {
	foundSet := set.NewStringSet()
	for _, ep := range l {
		for _, endpoint := range ep.Endpoints {
			if foundSet.Contains(endpoint.Hostname()) {
				continue
			}
			foundSet.Add(endpoint.Hostname())
		}
	}
	return foundSet.ToSlice()
}

 *  Fix: Don't crash with an `InaccessibleObjectException` when running on JDK17+ with strong
    encapsulation enabled.
 *  Fix: Strictly verify hostnames used with OkHttp's `HostnameVerifier`. Programs that make direct
    manual calls to `HostnameVerifier` could be defeated if the hostnames they pass in are not
    strictly ASCII. This issue is tracked as [CVE-2021-0341].


## Version 4.9.1

_2021-01-30_

  /**
   * The maximum number of requests for each host to execute concurrently. This limits requests by
   * the URL's host name. Note that concurrent requests to a single IP address may still exceed this
   * limit: multiple hostnames may share an IP address or be routed through the same HTTP proxy.
   *
   * If more than [maxRequestsPerHost] requests are in flight when this is invoked, those requests
   * will remain in flight.
   *

  fun check(
    hostname: String,
    vararg peerCertificates: Certificate,
  ) {
    check(hostname, peerCertificates.toList())
  }

  /**
   * Returns list of matching certificates' pins for the hostname. Returns an empty list if the
   * hostname does not have pinned certificates.
   */
  fun findMatchingPins(hostname: String): List<Pin> = pins.filterList { matchesHostname(hostname) }

 *    "www.squareup.com".
 *
 *  * **A set of hostnames.** These are in the certificate's subject alternative name (SAN)
 *    extension. A subject alternative name is either a literal hostname (`squareup.com`), a literal
 *    IP address (`74.122.190.80`), or a hostname pattern (`*.api.squareup.com`).
 *

        }
        return percentEncoded.readUtf8()
      }
    },

    /** URLs that contain this character in this component are invalid.  */
    FORBIDDEN,

    /** Hostnames that contain this character are encoded with punycode.  */
    PUNYCODE,

    /** This code point is special and should not be tested.  */
    SKIP,

    ;

 *  New: Update HTTP/2 support to `h2-16` and `hpack-10`.
 *  New: APIs to prevent retrying non-idempotent requests.
 *  Fix: Drop NPN support. Going forward we support ALPN only.
 *  Fix: The hostname verifier is now strict. This is consistent with the hostname
    verifier in modern browsers.
 *  Fix: Improve `CONNECT` handling for misbehaving HTTP proxies.
 *  Fix: Don't retry requests that failed due to timeouts.

        }
        return def;
    }

    /**
     * Retrieve an array of <code>InetAddress</code> created from a property
     * value containting a <code>delim</code> separated list of hostnames and/or
     * ipaddresses.
     *
     * @param key the property key to look up
     * @param delim the delimiter used to separate addresses in the property value

     */
    public static UniAddress getByName(final String hostname) throws UnknownHostException {
        return getByName(hostname, false);
    }

    static boolean isDotQuadIP(final String hostname) {
        if (hostname != null && hostname.length() > 0 && Character.isDigit(hostname.charAt(0))) {
            int i, len, dots;
            char[] data;

            i = dots = 0; /* quick IP address validation */