} catch (e: GeneralSecurityException) {
    throw IllegalArgumentException("failed to decode certificate", e)
  }
}

/**
 * Returns the certificate encoded in [PEM format][rfc_7468].
 *
 * [rfc_7468]: https://tools.ietf.org/html/rfc7468
 */
fun X509Certificate.certificatePem(): String {
  return buildString {
    append("-----BEGIN CERTIFICATE-----\n")

          sink.writeUtf8("Numbers\n");
          sink.writeUtf8("-------\n");
          for (int i = 2; i <= 997; i++) {
            System.out.println(i);
            Thread.sleep(10);
            sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
          }
          sink.close();
        } catch (IOException | InterruptedException e) {
          e.printStackTrace();
        }
      }

      private String factor(int n) {

    return server.takeRequest()
  }

  /**
   * For Last-Modified and Date headers, we should echo the date back in the exact format we were
   * served.
   */
  @Test
  fun retainServedDateFormat() {
    // Serve a response with a non-standard date format that OkHttp supports.
    val lastModifiedDate = Date(System.currentTimeMillis() + TimeUnit.HOURS.toMillis(-1))

      .isEqualTo(28800000L)
    // Ignore trailing junk
    assertThat("Thursday, 01-Jan-1970 00:00:00 PST JUNK".toHttpDateOrNull()!!.time)
      .isEqualTo(28800000L)

    // ANSI C's asctime() format
    // This format ignores the timezone entirely even if it is present and uses GMT.
    assertThat("Fri Jun 6 12:30:30 2014 PST".toHttpDateOrNull()!!.time).isEqualTo(1402057830000L)
    // Ignore trailing junk.

import java.io.IOException
import java.net.InetSocketAddress
import java.net.Proxy
import java.net.ProxySelector
import java.net.SocketAddress
import java.net.URI
import okhttp3.internal.format

class RecordingProxySelector : ProxySelector() {
  @JvmField val proxies = mutableListOf<Proxy>()

  private val requestedUris = mutableListOf<URI>()
  private val failures = mutableListOf<String>()

      }
    }
  }
}

private fun Logger.log(
  task: Task,
  queue: TaskQueue,
  message: String,
) {
  fine("${queue.name} ${String.format("%-22s", message)}: ${task.name}")
}

/**
 * Returns a duration in the nearest whole-number units like "999 µs" or "  1 s ". This rounds 0.5

(RFC 3454). Fragments of this RFC are dumped into the files in this directory and parsed by
`StringprepTablesReader` into a model that can be used at runtime.

This format is chosen to make it easy to validate that these tables are consistent with the RFC.

```
cd okhttp/src/test/resources/okhttp3/internal/idn/
ls rfc3454.*.txt | xargs -n 1 -I {} bash -c "echo {} ; cat {}" > okhttp_tables.txt

import okhttp3.internal.http2.Http2.frameLog
import okhttp3.internal.http2.Http2.frameLogWindowUpdate
import org.junit.jupiter.api.Test

class FrameLogTest {
  /** Real stream traffic applied to the log format.  */
  @Test
  fun exampleStream() {
    assertThat(frameLog(false, 0, 5, TYPE_SETTINGS, FLAG_NONE))
      .isEqualTo(">> 0x00000000     5 SETTINGS      ")

    .sslSocketFactory(clientCertificates.sslSocketFactory(), clientCertificates.trustManager())
    .build();
```

PEM files
---------

You can encode a `HeldCertificate` in PEM format:

```java
HeldCertificate heldCertificate = ...
System.out.println(heldCertificate.certificatePem())
```

```
-----BEGIN CERTIFICATE-----

      replaced with your own identifying information. (Don't include
      the brackets!)  The text should be enclosed in the appropriate
      comment syntax for the file format. We also recommend that a
      file or class name and description of purpose be included on the
      same "printed page" as the copyright notice for easier
      identification within third-party archives.