OutputStreamDataSink is fetching response body in memory

[ndr-brt]

Feature Request

Looks like OutputStreamDataSink is not streaming directly the proxied call to the caller but it fetches the data in memory using an additional stream:

Connector/core/data-plane/data-plane-util/src/main/java/org/eclipse/edc/connector/dataplane/util/sink/OutputStreamDataSink.java

Line 67 in 9e9eeab

return StreamResult.success(stream.toString());

An improvement would be to stream directly from the call made on the source to the caller to save memory and permit long-running calls.

Which Areas Would Be Affected?

data plane

Why Is the Feature Desired?

performances

Solution Proposal

If possible, provide a (brief!) solution proposal.