*  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

package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody

class PostString {
  private val client = OkHttpClient()

  fun run() {
    val postBody =
      """
      |Releases
      |--------
      |
      | * _1.0_ May 6, 2013

                            "name": "item_id",
                            "in": "path",
                        }
                    ],
                    "requestBody": {
                        "content": {
                            "application/json": {
                                "schema": IsDict(
                                    {

                            "name": "item_id",
                            "in": "path",
                        }
                    ],
                    "requestBody": {
                        "content": {
                            "application/json": {
                                "schema": IsDict(
                                    {

 * limitations under the License.
 */
package okhttp3.recipes.kt

import java.io.IOException
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.RequestBody.Companion.asRequestBody
import okio.Path.Companion.toPath
import okio.buffer
import okio.fakefilesystem.FakeFileSystem

class PostPath {
  private val client = OkHttpClient()

 * limitations under the License.
 */
@file:Suppress("ktlint:standard:filename")

package okhttp3.internal

import okhttp3.Headers
import okhttp3.RequestBody
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.ResponseBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okio.ArrayIndexOutOfBoundsException
import okio.Buffer
import okio.BufferedSink

        "paths": {
            "/product": {
                "get": {
                    "summary": "Create Item",
                    "operationId": "create_item_product_get",
                    "requestBody": {
                        "content": {
                            "application/json": {
                                "schema": {"$ref": "#/components/schemas/Product"}
                            }

    enableProtocol(Protocol.HTTP_2)
    server.enqueue(MockResponse(body = "Response 1"))
    server.enqueue(MockResponse(body = "Response 2"))
    val requestBody: RequestBody =
      object : RequestBody() {
        override fun contentType(): MediaType? {
          return null
        }

        override fun writeTo(sink: BufferedSink) {
          sink.writeUtf8("abc")

                            },
                        },
                    },
                    "summary": "Login",
                    "operationId": "login_login__post",
                    "requestBody": {
                        "content": {
                            "application/x-www-form-urlencoded": {
                                "schema": {"$ref": "#/components/schemas/FormData"}
                            }

                            },
                        },
                    },
                    "summary": "Login",
                    "operationId": "login_login__post",
                    "requestBody": {
                        "content": {
                            "application/x-www-form-urlencoded": {
                                "schema": {"$ref": "#/components/schemas/FormData"}
                            }