* [ResponseBody.source] always throws on such instances.
   *
   * It is safe and supported to call [ResponseBody.contentType] and [ResponseBody.contentLength] on
   * all instances of [ResponseBody].
   */
  @get:JvmName("body") val body: ResponseBody,
  /**
   * Non-null if this response is a successful upgrade ...
   */
  @get:JvmName("socket") val socket: Socket?,

          headersOf("header-name", "header-value"),
          object : RequestBody() {
            override fun contentType() = "application/octet-stream".toMediaTypeOrNull()

            override fun contentLength() = 1024L * 1024L * 100L

            override fun writeTo(sink: BufferedSink) {
              val a1024x1024 = "a".repeat(1024 * 1024)
              repeat(100) {
                sink.writeUtf8(a1024x1024)

 *  New: `Headers.of(Map)` creates headers from a Map.


## Version 2.2.0

_2014-12-30_

 *  **`RequestBody.contentLength()` now throws `IOException`.**
    This is a source-incompatible change. If you have code that calls
    `RequestBody.contentLength()`, your compile will break with this
    update. The change is binary-compatible, however: code compiled

      }

    public fun body(body: Buffer): Builder = body(body.toMockResponseBody())

    public fun body(body: MockResponseBody): Builder =
      apply {
        setHeader("Content-Length", body.contentLength)
        this.body = body
      }

    /** Sets the response body to the UTF-8 encoded bytes of [body]. */
    public fun body(body: String): Builder = body(Buffer().writeUtf8(body))

}

public final class okhttp3/FormBody : okhttp3/RequestBody {
	public static final field Companion Lokhttp3/FormBody$Companion;
	public final fun -deprecated_size ()I
	public fun contentLength ()J
	public fun contentType ()Lokhttp3/MediaType;
	public final fun encodedName (I)Ljava/lang/String;
	public final fun encodedValue (I)Ljava/lang/String;
	public final fun name (I)Ljava/lang/String;

		}
		r.Body = hash.NewChecker(r.Body, md5.New(), want, r.ContentLength)
		return true
	}
	cs, err := hash.GetContentChecksum(r.Header)
	if err != nil {
		return false
	}
	if cs == nil || !cs.Type.IsSet() {
		return false
	}
	if cs.Valid() && !cs.Type.Trailing() {
		r.Body = hash.NewChecker(r.Body, cs.Type.Hasher(), cs.Raw, r.ContentLength)
	}
	return true
}

	}

	// Get request range.
	rangeHeader := r.Header.Get(xhttp.Range)
	if rangeHeader != "" {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrUnsupportedRangeHeader), r.URL)
		return
	}

	if r.ContentLength <= 0 {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEmptyRequestBody), r.URL)
		return
	}

	// Take read lock on object, here so subsequent lower-level
	// calls do not need to.

	commonS3Headers := []string{
		xhttp.Date,
		xhttp.ETag,
		xhttp.ServerInfo,
		xhttp.Connection,
		xhttp.AcceptRanges,
		xhttp.ContentRange,
		xhttp.ContentEncoding,
		xhttp.ContentLength,
		xhttp.ContentType,
		xhttp.ContentDisposition,
		xhttp.LastModified,
		xhttp.ContentLanguage,
		xhttp.CacheControl,
		xhttp.RetryAfter,
		xhttp.AmzBucketRegion,
		xhttp.Expires,
		"X-Amz*",

		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrReplicationNeedsVersioningError), r.URL)
		return
	}
	replicationConfig, err := replication.ParseConfig(io.LimitReader(r.Body, r.ContentLength))
	if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrMalformedXML)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

        .Builder()
        .body("ab")
        .onResponseBody(CloseSocket())
        .build(),
    )
    val connection = server.url("/").toUrl().openConnection()
    assertThat(connection!!.contentLength).isEqualTo(2)
    val inputStream = connection.getInputStream()
    assertThat(inputStream!!.read()).isEqualTo('a'.code)
    try {
      val byteRead = inputStream.read()
      // OpenJDK behavior: end of stream.