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Hybrid local UI leaves synchronous Runtime responses open #257

Description

@dajiaohuang

Description

The synchronous /ui/chat Runtime path creates a streamed requests.Response but never closes it on success or failure. The neighboring /ui/chat/stream implementation already uses a finally block to close the same resource.

Reproduction

Environment: Windows 11, Python 3.12.13, commit 0890278a6571e4190c1ab8cacd9becc147f74d9c.

Using a fake response whose raise_for_status() raises requests.ConnectionError, call local_ui.chat() with a configured Runtime endpoint and inspect whether close() was called. The endpoint correctly converts the error to HTTP 502, but the response remains open (closed=False). The same absence of cleanup applies to successful JSON and SSE returns.

Expected behavior

Every response returned by requests.post(..., stream=True) should be closed on all success and exception paths.

Impact

Repeated synchronous UI calls, especially failed or partially consumed Runtime streams, can retain HTTP connection/socket resources until garbage collection and eventually reduce connection-pool availability in a long-running demo process.

Suggested fix

Track the response and close it in a finally block, matching the existing streaming endpoint's lifecycle handling. Add regression tests covering both a normal return and an HTTP error.

Activity

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