修复代理与日志链路的可靠性问题

proxy/sse_event_test.go

@@ -19,3 +19,15 @@ func TestSSEEventTrackerAcceptsCROnlyEventBoundary(t *testing.T) {
 		t.Fatal("terminal SSE event with CR-only boundary should be complete")
 	}
 }
+
+func TestSSEEventTrackerStopsBufferingOverLimit(t *testing.T) {
+	tracker := newSSEEventTracker(8)
+	tracker.Write([]byte("data: 123456789"))
+
+	if tracker.Complete() {
+		t.Fatal("overflowed SSE tracker must not report a complete stream")
+	}
+	if len(tracker.buf) != 0 || !tracker.overflow {
+		t.Fatalf("overflow state=%v buffered=%d, want overflow with released buffer", tracker.overflow, len(tracker.buf))
+	}
+}