method == "PROPPATCH" ||
        method == "QUERY" ||
        // WebDAV
        method == "REPORT"
    )

  @JvmStatic // Despite being 'internal', this method is called by popular 3rd party SDKs.
  fun permitsRequestBody(method: String): Boolean = !(method == "GET" || method == "HEAD")

  fun redirectsWithBody(method: String): Boolean = method == "PROPFIND"

  fun redirectsToGet(method: String): Boolean = method != "PROPFIND"

    var invokeStartEvent = true
    var responseBuilder: Response.Builder? = null
    var sendRequestException: IOException? = null
    val hasRequestBody = HttpMethod.permitsRequestBody(request.method) && requestBody != null
    val isUpgradeRequest = "upgrade".equals(request.header("Connection"), ignoreCase = true)
    try {
      exchange.writeRequestHeaders(request)

      if (hasRequestBody) {

        if (body == null) {
          require(!HttpMethod.requiresRequestBody(method)) {
            "method $method must have a request body."
          }
        } else {
          require(HttpMethod.permitsRequestBody(method)) {
            "method $method must not have a request body."
          }
        }
        this.method = method
        this.body = body
      }

    /**