DAQ: added error handling for mount exceptions in server.py.

daq/src/aaredaq/server.py

@@ -27,8 +27,6 @@ from aaredaqlib.beamline import mx_beamline
 from aaredaq.config import BeamlineConfig
 from aaredaq.daq import AareDAQ, LoopCenteringFailed, TransformationInvalidException, MountingFailed
 
-from aaredaq.camera_stat_thread import start_image_stats_receiver, stop_image_stats_receiver
-
 app = FastAPI()
 
 # OAuth2 setup
@@ -253,7 +251,18 @@ async def mount(dbid: int, token: str = Depends(oauth2_scheme), reference: bool
     if index == -1:
         raise RuntimeError("Sample not found")
     if token_data.staff or st.s[index].user in token_data.pgroups:
-        daq.sample = st.s[index]
+        try:
+            daq.sample = st.s[index]
+        except MountingFailed(Exception) as e:
+            raise HTTPException(
+                status_code=api_status.HTTP_404_NOT_FOUND,
+                detail=f"{e}",
+            )
+        except Exception as e:
+            raise HTTPException(
+                status_code=api_status.HTTP_500_INTERNAL_SERVER_ERROR,
+                detail=f"{e}"
+            )
         return "OK"
     else:
         raise HTTPException(
@@ -399,7 +408,7 @@ async def auto(s: SampleShortInfo, token: str = Depends(oauth2_scheme)):
     except MountingFailed(Exception) as e:
         raise HTTPException(
             status_code=api_status.HTTP_404_NOT_FOUND,
-            detail=f"Mounting failed: {e}",
+            detail=f"{e}",
         )
     except Exception as e:
         logger.error(f"Exception in auto: {e}")