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package http
import (
"context"
"github.com/aws/smithy-go/logging"
"github.com/aws/smithy-go/middleware"
"io"
"io/ioutil"
)
// AddErrorCloseResponseBodyMiddleware adds the middleware to automatically
// close the response body of an operation request if the request response
// failed.
func AddErrorCloseResponseBodyMiddleware(stack *middleware.Stack) error {
return stack.Deserialize.Insert(&errorCloseResponseBodyMiddleware{}, "OperationDeserializer", middleware.Before)
}
type errorCloseResponseBodyMiddleware struct{}
func (*errorCloseResponseBodyMiddleware) ID() string {
return "ErrorCloseResponseBody"
}
func (m *errorCloseResponseBodyMiddleware) HandleDeserialize(
ctx context.Context, input middleware.DeserializeInput, next middleware.DeserializeHandler,
) (
output middleware.DeserializeOutput, metadata middleware.Metadata, err error,
) {
out, metadata, err := next.HandleDeserialize(ctx, input)
if err != nil {
if resp, ok := out.RawResponse.(*Response); ok && resp != nil && resp.Body != nil {
// Consume the full body to prevent TCP connection resets on some platforms
_, _ = io.Copy(ioutil.Discard, resp.Body)
// Do not validate that the response closes successfully.
resp.Body.Close()
}
}
return out, metadata, err
}
// AddCloseResponseBodyMiddleware adds the middleware to automatically close
// the response body of an operation request, after the response had been
// deserialized.
func AddCloseResponseBodyMiddleware(stack *middleware.Stack) error {
return stack.Deserialize.Insert(&closeResponseBody{}, "OperationDeserializer", middleware.Before)
}
type closeResponseBody struct{}
func (*closeResponseBody) ID() string {
return "CloseResponseBody"
}
func (m *closeResponseBody) HandleDeserialize(
ctx context.Context, input middleware.DeserializeInput, next middleware.DeserializeHandler,
) (
output middleware.DeserializeOutput, metadata middleware.Metadata, err error,
) {
out, metadata, err := next.HandleDeserialize(ctx, input)
if err != nil {
return out, metadata, err
}
if resp, ok := out.RawResponse.(*Response); ok {
// Consume the full body to prevent TCP connection resets on some platforms
_, copyErr := io.Copy(ioutil.Discard, resp.Body)
if copyErr != nil {
middleware.GetLogger(ctx).Logf(logging.Warn, "failed to discard remaining HTTP response body, this may affect connection reuse")
}
closeErr := resp.Body.Close()
if closeErr != nil {
middleware.GetLogger(ctx).Logf(logging.Warn, "failed to close HTTP response body, this may affect connection reuse")
}
}
return out, metadata, err
}
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