With a few small exceptions (below), OkHttp 4.x is both binary- and Java source-compatible with
OkHttp 3.x. You can use an OkHttp 4.x .jar file with applications or libraries built for OkHttp 3.x.

OkHttp is **not** source-compatible for Kotlin callers, but upgrading should be automatic thanks to
Kotlin’s powerful deprecation features. Most developers should be able to use IntelliJ’s _Code
Cleanup_ for a safe and fast upgrade.

 *  New: Create a JPMS-compatible artifact for `JavaNetCookieJar`. Previously, multiple OkHttp
    artifacts defined classes in the `okhttp3` package, but this is forbidden by the Java module
    system. We've fixed this with a new package (`okhttp3.java.net.cookiejar`) and a new artifact,
    `com.squareup.okhttp3:okhttp-java-net-cookiehandler`. (The original artifact now delegates to
    this new one.)

    ```kotlin

 *  **URLConnection support has moved to the okhttp-urlconnection module.**
    If you're upgrading from 1.x, this change will impact you. You will need to
    add the `okhttp-urlconnection` module to your project and use the
    `OkUrlFactory` to create new instances of `HttpURLConnection`:

    ```java
    // OkHttp 1.x:
    HttpURLConnection connection = client.open(url);

    // OkHttp 2.x:

    keep all of your OkHttp artifacts on the same version, even if they're declared via transitive
    dependencies. You can even omit versions when declaring other OkHttp dependencies.

    ```kotlin
    dependencies {
       api(platform("com.squareup.okhttp3:okhttp-bom:4.4.0"))
       api("com.squareup.okhttp3:okhttp")              // No version!

ciphers.

When negotiating a connection to an HTTPS server, OkHttp needs to know which [TLS versions](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-tls-version/) and [cipher suites](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-cipher-suite/) to offer. A client that wants to maximize connectivity would include obsolete TLS versions and weak-by-design cipher suites. A strict client that wants to maximize security would be limited to only the latest TLS version and strongest cipher suites....

To prevent a response from using the cache, use [`CacheControl.FORCE_NETWORK`](http://square.github.io/okhttp/4.x/okhttp/okhttp3/-cache-control/-f-o-r-c-e_-n-e-t-w-o-r-k/). To prevent it from using the network, use [`CacheControl.FORCE_CACHE`](http://square.github.io/okhttp/4.x/okhttp/okhttp3/-cache-control/-f-o-r-c-e_-c-a-c-h-e/). Be warned: if you use `FORCE_CACHE` and the response requires the network, OkHttp will return a `504 Unsatisfiable Request` response.

import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Protocol
import okhttp3.RecordingHostnameVerifier
import okhttp3.Request
import okhttp3.RequestBody
import okhttp3.RequestBody.Companion.gzip
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.logging.HttpLoggingInterceptor.Level
import okhttp3.testing.PlatformRule
import okio.Buffer
import okio.BufferedSink

 * limitations under the License.
 */
package okhttp3

import java.util.Arrays
import java.util.Objects
import javax.net.ssl.SSLSocket
import okhttp3.ConnectionSpec.Builder
import okhttp3.internal.concat
import okhttp3.internal.effectiveCipherSuites
import okhttp3.internal.hasIntersection
import okhttp3.internal.indexOf
import okhttp3.internal.intersect

/**

import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.SocketPolicy.DisconnectAtEnd
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okhttp3.TestUtil.assertSuppressed
import okio.Buffer
import okio.BufferedSink
import okio.ForwardingSink
import okio.ForwardingSource

@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")

package okhttp3.logging

import java.io.IOException
import java.nio.charset.Charset
import java.util.TreeSet
import java.util.concurrent.TimeUnit
import okhttp3.Headers
import okhttp3.HttpUrl
import okhttp3.Interceptor
import okhttp3.OkHttpClient
import okhttp3.Response
import okhttp3.internal.charsetOrUtf8
import okhttp3.internal.http.promisesBody
import okhttp3.internal.platform.Platform