![Events Diagram](../assets/images/******@****.***)

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java

package okhttp3.sample;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.SecureRandom;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;
import okhttp3.mockwebserver.Dispatcher;

    address[b++] = (value.ushr(8) and 0xff).toByte()
    address[b++] = (value and 0xff).toByte()
  }

  // All done. If compression happened, we need to move bytes to the right place in the
  // address. Here's a sample:
  //
  //      input: "1111:2222:3333::7777:8888"
  //     before: { 11, 11, 22, 22, 33, 33, 00, 00, 77, 77, 88, 88, 00, 00, 00, 00  }
  //   compress: 6
  //          b: 10

    private development environments that only carry test data. Prefer this over creating an
    all-trusting `TrustManager` because only hosts on the allowlist are insecure. From
    [our DevServer sample][dev_server]:

    ```kotlin
    val clientCertificates = HandshakeCertificates.Builder()
        .addPlatformTrustedCertificates()
        .addInsecureHost("localhost")
        .build()

plugins {
  kotlin("jvm")
  id("com.github.johnrengelman.shadow")
}

tasks.compileJava {
  options.isWarnings = false
}

tasks.jar {
  manifest {
    attributes("Main-Class" to "okhttp3.sample.SampleServer")
  }
}

dependencies {
  implementation(projects.mockwebserver)
}

tasks.shadowJar {
  mergeServiceFiles()

 */
package okhttp3.logging.internal

import java.io.EOFException
import okio.Buffer

/**
 * Returns true if the body in question probably contains human readable text. Uses a small
 * sample of code points to detect unicode control characters commonly used in binary file
 * signatures.
 */
fun Buffer.isProbablyUtf8(): Boolean {
  try {
    val prefix = Buffer()
    val byteCount = size.coerceAtMost(64)

      builder.addHeader("", "Value")
    }
  }

  @Test
  fun headerAllowsTabOnlyInValues() {
    val builder = Request.Builder()
    builder.header("key", "sample\tvalue")
    assertFailsWith<IllegalArgumentException> {
      builder.header("sample\tkey", "value")
    }
  }

  @Test
  fun headerForbidsControlCharacters() {
    assertForbiddenHeader("\u0000")
    assertForbiddenHeader("\r")

fage

// fail : 2014-03-06 Binky Moon, LLC
fail

// fairwinds : 2014-11-13 FairWinds Partners, LLC
fairwinds

// faith : 2014-11-20 dot Faith Limited
faith

// family : 2015-04-02 Dog Beach, LLC
family

// fan : 2014-03-06 Dog Beach, LLC
fan

// fans : 2014-11-07 ZDNS International Limited
fans

// farm : 2013-11-07 Binky Moon, LLC
farm

0BAB..0BAD    ; disallowed                             # NA   <reserved-0BAB>..<reserved-0BAD>
0BAE..0BB5    ; valid                                  # 1.1  TAMIL LETTER MA..TAMIL LETTER VA
0BB6          ; valid                                  # 4.1  TAMIL LETTER SHA
0BB7..0BB9    ; valid                                  # 1.1  TAMIL LETTER SSA..TAMIL LETTER HA

events evenášši.no evje-og-hornnes.no exchange exchange.aero exeter.museum exhibition.museum exnet.su expert experts-comptables.fr exposed express express.aero extraspace ezproxy.kuleuven.be f.bg f.se fage fail fairwinds faith fakefur.jp fam.pk family family.museum familyds.com familyds.net familyds.org fan fans fantasyleague.cc far.br farm farm.museum farmequipment.museum farmers farmers.museum farmstead.museum farsund.no fashion fashionstore.jp fast fastly-edge.com fastly-terrarium.com fastlylb.net...