replaceWith = ReplaceWith(expression = "headers"),
    level = DeprecationLevel.ERROR,
  )
  fun getHeaders(): Headers = headers

  fun setHeaders(headers: Headers) = apply { this.headers = headers }

  @JvmName("-deprecated_getTrailers")
  @Deprecated(
    message = "moved to var",
    replaceWith = ReplaceWith(expression = "trailers"),
    level = DeprecationLevel.ERROR,
  )

import java.util.Collections
import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.Executors
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicInteger
import java.util.logging.Level
import java.util.logging.Logger
import okhttp3.TestUtil.threadFactory
import okhttp3.internal.and
import okhttp3.internal.closeQuietly
import okhttp3.internal.threadName
import okio.Buffer
import okio.BufferedSink

              }
            }
          }
        }
      }

      override fun flush() {
      }

      override fun close() {
      }
    }.apply {
      level = Level.FINEST
    }

  private fun applyLogger(fn: Logger.() -> Unit) {
    Logger.getLogger(OkHttpClient::class.java.`package`.name).fn()
    Logger.getLogger(OkHttpClient::class.java.name).fn()

  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "type"),
    level = DeprecationLevel.ERROR,
  )
  fun type(): MediaType = type

  @JvmName("-deprecated_boundary")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "boundary"),
    level = DeprecationLevel.ERROR,
  )
  fun boundary(): String = boundary

  @JvmName("-deprecated_size")

  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "address"),
    level = DeprecationLevel.ERROR,
  )
  fun address(): Address = address

  @JvmName("-deprecated_proxy")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "proxy"),
    level = DeprecationLevel.ERROR,
  )
  fun proxy(): Proxy = proxy

  @JvmName("-deprecated_socketAddress")

  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "name"),
    level = DeprecationLevel.ERROR,
  )
  fun name(): String = name

  @JvmName("-deprecated_value")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "value"),
    level = DeprecationLevel.ERROR,
  )
  fun value(): String = value

  @JvmName("-deprecated_persistent")

      replaceWith =
        ReplaceWith(
          expression = "content.toRequestBody(contentType)",
          imports = ["okhttp3.RequestBody.Companion.toRequestBody"],
        ),
      level = DeprecationLevel.WARNING,
    )
    fun create(
      contentType: MediaType?,
      content: String,
    ): RequestBody = content.toRequestBody(contentType)

    @JvmStatic
    @Deprecated(

    interceptor.level = HttpLoggingInterceptor.Level.BASIC
    var level: HttpLoggingInterceptor.Level = interceptor.level
    interceptor.intercept(newInterceptorChain())
  }

  @Test
  fun httpLoggingInterceptorLevel() {
    val none: HttpLoggingInterceptor.Level = HttpLoggingInterceptor.Level.NONE
    val basic: HttpLoggingInterceptor.Level = HttpLoggingInterceptor.Level.BASIC

  @Test
  fun testHttpLoggingInterceptor() {
    val interceptor =
      HttpLoggingInterceptor.androidLogging(tag = "testHttpLoggingInterceptor").apply {
        level = HttpLoggingInterceptor.Level.BASIC
      }

    val client = clientBuilder.addInterceptor(interceptor).build()

    try {
      client.newCall(request).execute()
    } catch (uhe: UnknownHostException) {
      // expected

    return response.body().string();
  }
}
```

Further examples are on the [OkHttp Recipes page][recipes].


Requirements
------------

OkHttp works on Android 5.0+ (API level 21+) and Java 8+.

OkHttp depends on [Okio][okio] for high-performance I/O and the [Kotlin standard library][kotlin]. Both are small libraries with strong backward-compatibility.