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[FIX] Preserve response headers across context restore in SecurityInterceptor #6123

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[FIX] Preserve response headers across context restore in SecurityInterceptor #6123

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17 changes: 12 additions & 5 deletions src/main/java/org/opensearch/security/transport/SecurityInterceptor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -178,8 +178,12 @@ public <T extends TransportResponse> void sendRequestDecorate(
requestHeadersToCopy.removeAll(Task.REQUEST_HEADERS); // Special case where this header is preserved during stashContext.
}

final Supplier<ThreadContext.StoredContext> restorableContextSupplier = getThreadContext().newRestorableContext(true);
try (ThreadContext.StoredContext stashedContext = getThreadContext().stashContext()) {
final TransportResponseHandler<T> restoringHandler = new RestoringTransportResponseHandler<T>(handler, stashedContext);
final TransportResponseHandler<T> restoringHandler = new RestoringTransportResponseHandler<T>(
handler,
restorableContextSupplier
);
getThreadContext().putHeader("_opendistro_security_remotecn", cs.getClusterName().value());

final Map<String, String> headerMap = new HashMap<>(
Expand Down Expand Up @@ -377,10 +381,13 @@ private ThreadContext getThreadContext() {
// which is private scoped
private class RestoringTransportResponseHandler<T extends TransportResponse> implements TransportResponseHandler<T> {

private final ThreadContext.StoredContext contextToRestore;
private final Supplier<ThreadContext.StoredContext> contextToRestore;
private final TransportResponseHandler<T> innerHandler;

private RestoringTransportResponseHandler(TransportResponseHandler<T> innerHandler, ThreadContext.StoredContext contextToRestore) {
private RestoringTransportResponseHandler(
TransportResponseHandler<T> innerHandler,
Supplier<ThreadContext.StoredContext> contextToRestore
) {
this.contextToRestore = contextToRestore;
this.innerHandler = innerHandler;
}
Expand All @@ -407,7 +414,7 @@ public void handleResponse(T response) {
List<String> dlsResponseHeader = responseHeaders.get(ConfigConstants.OPENDISTRO_SECURITY_DLS_QUERY_HEADER);
List<String> maskedFieldsResponseHeader = responseHeaders.get(ConfigConstants.OPENDISTRO_SECURITY_MASKED_FIELD_HEADER);

contextToRestore.restore();
contextToRestore.get();

final boolean isDebugEnabled = log.isDebugEnabled();
if (response instanceof ClusterSearchShardsResponse) {
Expand Down Expand Up @@ -438,7 +445,7 @@ public void handleResponse(T response) {

@Override
public void handleException(TransportException e) {
contextToRestore.restore();
contextToRestore.get();
innerHandler.handleException(e);
}

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