* fix: avoid stale stream writes after client disconnect
* fix: wait for stream ping goroutines before returning
* fix: log stream results after goroutine cleanup
* fix: broadcast stream stop signals
* fix: abort upstream on client disconnect and restore write error contracts
Keep the goroutine-lifecycle fix (unconditional wg.Wait before returning the
gin.Context, close resp.Body inside cleanup), but drop the drain-on-disconnect
behavior: when the client goes away, cleanup now runs immediately so the
upstream body is closed, the provider stops generating, and users are not
billed for tokens produced after they disconnected.
Also restore FlushWriter/StringData/PingData returning an error when the
request context is done, so non-scanner relay loops (ollama, fake-stream,
audio, image) keep their disconnect awareness instead of silently consuming
the upstream to completion. ResponseChunkData now propagates write errors.
Add a bounded per-write deadline (http.NewResponseController) before each
locked stream write so a slow-but-connected client cannot block a write
forever and hang the unconditional wg.Wait.
---------
Co-authored-by: CaIon <i@caion.me>
- Add StreamStatus type (relay/common) to track stream end reason
(done/timeout/client_gone/scanner_error/eof/panic/ping_fail) and
accumulate soft errors during streaming via sync.Once + sync.Mutex.
- Add StreamResult (relay/helper) as the callback interface: adapters
call sr.Error() for soft errors, sr.Stop() for fatal, sr.Done() for
normal completion. No early-return problem — multiple errors per chunk
are naturally supported.
- Refactor StreamScannerHandler callback from func(string) bool to
func(string, *StreamResult). All 9 channel adapters updated.
- Write stream_status into log other JSON field (admin-only) with
status ok/error, end_reason, error_count, and error messages.
- Frontend: display stream status in log detail expansion for admins.
- Introduced a new test file for StreamScannerHandler, covering various scenarios including nil inputs, empty bodies, chunk processing, order preservation, and handler failures.
- Enhanced error handling and data processing logic in StreamScannerHandler to improve robustness and performance.
