ref: use explicit paths instead of chdir

main.py

@@ -225,9 +225,7 @@ def unpack_pictures_zip(file: UploadFile, time):
     import os
 
     print(f"Accepted {file.filename} at {time} into processing")
-    os.chdir(DATA_LOCATION)
-    os.makedirs("processing", exist_ok=True)
-    os.chdir("processing")
+    os.makedirs(os.path.join(DATA_LOCATION, "processing"), exist_ok=True)
 
     # using private ._file field is a dirty hack, but
     # SpooledTemporaryFile does not implement seekable
@@ -236,7 +234,10 @@ def unpack_pictures_zip(file: UploadFile, time):
     with zipfile.ZipFile(file.file._file) as photo_zip:
         problem_files = photo_zip.testzip()
         if problem_files is not None:
-            print(f"Errors in {file.filename} accepted at {time}: {problem_files}")
-        photo_zip.extractall()
+            print(f"Errors in {file.filename} from {time} at {problem_files}")
+        photo_zip.extractall(path=os.path.join(DATA_LOCATION, "processing"))
         photo_zip.close()
-    print(f"Succesfully processed {file.filename} accepted at {time}")
+
+    print(f"Start processing {file.filename} from {time}")
+
+    print(f"Succesfully processed {file.filename} from {time}")