Gate OkHttp body capture on active Session Replay #6138

OkHttp captures allowlisted response bodies even when Session Replay is neither recording nor buffering. For SSE responses, peekBody(150KB + 1) can delay events until the connection closes.

Gate body capture on active Session Replay. Skip known streaming content types, at minimum text/event-stream, before calling peekBody().

Captured body contents are only used for Session Replay; spans, breadcrumbs, and failed-request events use sizes, status, and headers rather than body contents.

Relevant implementation: capture condition and peekBody call.