Fix Internal server on validation

validata_ui/views.py

@@ -212,13 +212,18 @@ def validate(schema_code, source: ValidataSource):
         validata_core_report = ValidatorHelper.validate(
             schema_code=schema_code,
             force_strings=True,
-            **source.get_tabulator_params(),
+            **source.get_tabulator_params()
         )
+
+        # Validator.validate() doesn't throw FormatError if source.format is None
+        # Just do it manually
+        if source.format is None:
+            raise tabulator.exceptions.FormatError()
+
     except tabulator.exceptions.FormatError:
         flash_error('Erreur : format de fichier non supporté')
         return redirect(url_for('scdl_validator', val_code=schema_code))
 
-    # source_errors = [err for err in validata_core_report['tables'][0]['errors'] if err['code'] == 'source-error']
     source_errors = [err for err in validata_core_report['tables'][0]['errors'] if err['code'] == 'source-error']
     if source_errors:
         err = source_errors[0]