s3 cache client-side support

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/aws/smithy-go/transport/http/response.go

@@ -0,0 +1,34 @@
+package http
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// Response provides the HTTP specific response structure for HTTP specific
+// middleware steps to use to deserialize the response from an operation call.
+type Response struct {
+	*http.Response
+}
+
+// ResponseError provides the HTTP centric error type wrapping the underlying
+// error with the HTTP response value.
+type ResponseError struct {
+	Response *Response
+	Err      error
+}
+
+// HTTPStatusCode returns the HTTP response status code received from the service.
+func (e *ResponseError) HTTPStatusCode() int { return e.Response.StatusCode }
+
+// HTTPResponse returns the HTTP response received from the service.
+func (e *ResponseError) HTTPResponse() *Response { return e.Response }
+
+// Unwrap returns the nested error if any, or nil.
+func (e *ResponseError) Unwrap() error { return e.Err }
+
+func (e *ResponseError) Error() string {
+	return fmt.Sprintf(
+		"http response error StatusCode: %d, %v",
+		e.Response.StatusCode, e.Err)
+}