okhttp parse request from string code example

Example: okhttp kotlin example

private val client = OkHttpClient()

  fun run() {
    val request = Request.Builder()
        .url("http://publicobject.com/helloworld.txt")
        .build()

    client.newCall(request).enqueue(object : Callback {
      override fun onFailure(call: Call, e: IOException) {
        e.printStackTrace()
      }

      override fun onResponse(call: Call, response: Response) {
        response.use {
          if (!response.isSuccessful) throw IOException("Unexpected code $response")

          for ((name, value) in response.headers) {
            println("$name: $value")
          }

          println(response.body!!.string())
        }
      }
    })
  }