Contributing
============

If you would like to contribute code to OkHttp you can do so through GitHub by
forking the repository and sending a pull request.

When submitting code, please make every effort to follow existing conventions
and style in order to keep the code as readable as possible. Please also make
sure your code compiles by running `./gradlew check`. Checkstyle failures
during compilation indicate errors in your style and can be viewed in the

 * `::1` will reach the IPv6 server.
 *
 * By orchestrating two different servers with the same port but different IP addresses, we can
 * test what OkHttp does when both are reachable, or if only one is reachable.
 *
 * This test only runs on host machines that have both IPv4 and IPv6 addresses for localhost.
 */
@Timeout(30)
class FastFallbackTest {
  @RegisterExtension

    println("Proxy Server 1 is ${server1.inetSocketAddress}")
    println("Proxy Server 2 is ${server2.inetSocketAddress}")

    // Since myproxy:8008 won't resolve, redirect with DNS to proxyServer1
    // Then redirect socket connection to server1
    dns["myproxy"] = listOf(proxyServer1)
    socketFactory[proxyServer1] = server1.inetSocketAddress

    client = client.newBuilder().proxySelector(proxySelector).build()

      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? =
    if (sslSocket is org.openjsse.javax.net.ssl.SSLSocket) {
      when (val protocol = sslSocket.applicationProtocol) {
        // Handles both un-configured and none selected.
        null, "" -> null
        else -> protocol
      }
    } else {
      super.getSelectedProtocol(sslSocket)

      },
      logger = logger,
    )

  /** Runs all tasks that are ready. Used by the test thread only. */
  fun runTasks() {
    advanceUntil(nanoTime)
  }

  /** Advance the simulated clock, then runs tasks that are ready. Used by the test thread only. */
  fun advanceUntil(newTime: Long) {
    taskRunner.assertThreadDoesntHoldLock()

    taskRunner.lock.withLock {
      check(currentTask == TestThreadSerialTask)

  internal operator fun invoke(input: BufferedSource): String? {
    // 1. Map.
    val mapResult = Buffer()
    while (!input.exhausted()) {
      val codePoint = input.readUtf8CodePoint()
      when (val mappedCodePoint = mapping[codePoint]) {
        null -> mapResult.writeUtf8CodePoint(codePoint)
        else -> mapResult.writeUtf8(mappedCodePoint)
      }
    }

    // 2. Normalize
    // TODO.

Debug Logging
=============

OkHttp has internal APIs to enable debug logging. It uses the `java.util.logging` API which can be
tricky to configure. As a shortcut, you can paste [OkHttpDebugLogging.kt]. Then enable debug logging
for whichever features you need:

```
OkHttpDebugLogging.enableHttp2()
OkHttpDebugLogging.enableTaskRunner()
```

### Activating on Android

```
$ adb shell setprop log.tag.okhttp.Http2 DEBUG

 * A concrete interceptor chain that carries the entire interceptor chain: all application
 * interceptors, the OkHttp core, all network interceptors, and finally the network caller.
 *
 * If the chain is for an application interceptor then [exchange] must be null. Otherwise it is for
 * a network interceptor and [exchange] must be non-null.
 */
class RealInterceptorChain(
  internal val call: RealCall,
  private val interceptors: List<Interceptor>,

    method: String = "\u0000",
    body: RequestBody? = null,
  ) : this(
    Builder()
      .url(url)
      .headers(headers)
      .method(
        when {
          method != "\u0000" -> method
          body != null -> "POST"
          else -> "GET"
        },
        body,
      ),
  )

  fun header(name: String): String? = commonHeader(name)

    } catch (e: IllegalAccessException) {
      throw AssertionError(e)
    } catch (e: InvocationTargetException) {
      // https://github.com/square/okhttp/issues/5587
      val cause = e.cause
      when {
        cause is NullPointerException && cause.message == "ssl == null" -> null
        else -> throw AssertionError(e)
      }
    }
  }

  companion object {