The application-layer can also do blocking reads. If the application asks to read and there's nothing available, we need to hold that thread until either the bytes arrive, the stream is closed, or a timeout elapses. If we get bytes but there's nobody asking for them, we buffer them. We don't consider bytes as delivered for flow control until they're consumed by the application.

      val request = chain.request()
      if (level == Level.NONE) {
        return chain.proceed(request)
      }

      val logBody = level == Level.BODY
      val logHeaders = logBody || level == Level.HEADERS

      val requestBody = request.body

      val connection = chain.connection()
      var requestStartMessage =

class ResponseBodyJvmTest {
  @Test
  fun stringEmpty() {
    val body = body("")
    assertThat(body.string()).isEqualTo("")
  }

  @Test
  fun stringLooksLikeBomButTooShort() {
    val body = body("000048")
    assertThat(body.string()).isEqualTo("\u0000\u0000H")
  }

  @Test
  fun stringDefaultsToUtf8() {
    val body = body("68656c6c6f")
    assertThat(body.string()).isEqualTo("hello")
  }

  @Test

        Request(
          url = server.url("/"),
          body = body.toRequestBody(),
        ),
      )
    assertThat(response.code).isEqualTo(200)
    response.body.byteStream().close()
    val recordedRequest1 = server.takeRequest()
    assertThat(recordedRequest1.method).isEqualTo("POST")
    assertThat(recordedRequest1.body.readUtf8()).isEqualTo(body)
    assertThat(recordedRequest1.headers["Authorization"]).isNull()

    server.enqueue(
      MockResponse(
        body = "abc",
        socketPolicy = DoNotReadRequestBody(ErrorCode.NO_ERROR.httpCode),
      ),
    )

    val call =
      client.newCall(
        Request(
          url = server.url("/"),
          body = SlowRequestBody,
        ),
      )

    call.execute().use { response ->
      assertThat(response.body.string()).isEqualTo("abc")
    }

   * proceed to read the response body with [Response.body]. The response is still live until its
   * response body is [closed][ResponseBody]. The recipient of the callback may consume the response
   * body on another thread.
   *
   * Note that transport-layer success (receiving a HTTP response code, headers and body) does not

    try {
      println(response.code)
      println("PROTOCOL ${response.protocol}")
      var line: String?
      while (response.body.source().readUtf8Line().also { line = it } != null) {
        println(line)
      }
    } finally {
      response.body.close()
    }
    client.connectionPool.evictAll()
  }

try (Response response = client.newCall(request).execute()) {
  // Consume and discard the response body.
  response.body().source().readByteString();
}

System.out.println("REQUEST 2 (pooled connection)");
try (Response response = client.newCall(request).execute()) {
  // Consume and discard the response body.
  response.body().source().readByteString();
}
```

And the listener prints the corresponding events:

```

```

Your unit tests might move the `server` into a field so you can shut it down
from your test's `tearDown()`.

### API

#### MockResponse

Mock responses default to an empty response body and a `200` status code.
You can set a custom body with a string, input stream or byte array. Also
add headers with a fluent builder API.

```java
MockResponse response = new MockResponse()

      MockResponse.Builder()
        .body("hello, Java HTTP Client")
        .build(),
    )

    val request =
      HttpRequest.newBuilder(server.url("/").toUri())
        .header("Accept", "text/plain")
        .build()

    val response = httpClient.send(request, BodyHandlers.ofString())
    assertThat(response.statusCode()).isEqualTo(200)
    assertThat(response.body()).isEqualTo("hello, Java HTTP Client")