exception for file path

device/templates/details.html

@@ -58,7 +58,7 @@
         <div class="col-lg-9 col-md-8">{{ object.type }}</div>
       </div>
 
-      {% if object.is_websnapshot %}
+      {% if object.is_websnapshot and object.last_user_evidence %}
         {% for k, v in object.last_user_evidence %}
           <div class="row mb-3">
             <div class="col-lg-3 col-md-4 label">{{ k }}</div>

evidence/forms.py

@@ -37,6 +37,8 @@ class UploadForm(forms.Form):
                 if exist_annotation:
                     raise ValidationError("error: {} exist".format(file_name))
 
+            except ValueError:
+                raise ValidationError("Error in parsing JSON: {}. Check for file corruption.".format(file_name))
             except Exception:
                 raise ValidationError("error in: {}".format(file_name))
 

evidence/management/commands/up_snapshots.py

@@ -37,6 +37,8 @@ class Command(BaseCommand):
 
         elif os.path.isdir(path):
             self.read_directory(path)
+        else:
+            raise ValueError(f"The path {path} is neither a file nor a directory")
 
         self.parsing()
 
@@ -47,10 +49,16 @@ class Command(BaseCommand):
                 self.open(filepath)
 
     def open(self, filepath):
+        try:
             with open(filepath, 'r') as file:
                 content = json.loads(file.read())
                 path_name = save_in_disk(content, self.user.institution.name)
                 self.snapshots.append((content, path_name))
+        except json.JSONDecodeError:
+            raise ValueError(f"Invalid JSON format in file {filepath}.")
+        #or we cath'em all
+        except Exception as e:
+            raise Exception(f"Oops! Something went wrong there")
 
     def parsing(self):
             for s, p in self.snapshots: