if err != nil {
			return nil, err
		}
	}
	if !isHTTP {
		req.closeBody()
		return nil, badStringError("unsupported protocol scheme", scheme)
	}
	if req.Method != "" && !validMethod(req.Method) {
		req.closeBody()
		return nil, fmt.Errorf("net/http: invalid method %q", req.Method)
	}
	if req.URL.Host == "" {
		req.closeBody()
		return nil, errors.New("http: no Host in request URL")
	}

		defer func() {
			trace.WroteRequest(httptrace.WroteRequestInfo{
				Err: err,
			})
		}()
	}
	closed := false
	defer func() {
		if closed {
			return
		}
		if closeErr := r.closeBody(); closeErr != nil && err == nil {
			err = closeErr
		}
	}()

	// Find the target host. Prefer the Host: header, but if that
	// is not given, use the host from the request URL.
	//