fix: Improve variable decryption error handling (#6199)

* fix: Improve variable decryption error handling in DatabaseVariableService

Add robust error handling for variable decryption, logging decryption failures and falling back to the original value for generic type variables

* chore: Bump version to 1.1.4.post1 for langflow and 0.1.4.post1 for langflow-base

Author: ogabrielluiz

pyproject.toml

@@ -1,7 +1,7 @@
 
 [project]
 name = "langflow"
-version = "1.1.4"
+version = "1.1.4.post1"
 description = "A Python package with a built-in web application"
 requires-python = ">=3.10,<3.13"
 license = "MIT"
@@ -19,7 +19,7 @@ maintainers = [
 ]
 # Define your main dependencies here
 dependencies = [
-    "langflow-base==0.1.4",
+    "langflow-base==0.1.4.post1",
     "beautifulsoup4==4.12.3",
     "google-search-results>=2.4.1,<3.0.0",
     "google-api-python-client==2.154.0",

src/backend/base/langflow/services/variable/service.py

@@ -83,13 +83,19 @@ async def get_variable(
     async def get_all(self, user_id: UUID | str, session: AsyncSession) -> list[VariableRead]:
         stmt = select(Variable).where(Variable.user_id == user_id)
         variables = list((await session.exec(stmt)).all())
-        # If the variable is of type 'Generic' we decrypt the value
+        # For variables of type 'Generic', attempt to decrypt the value.
+        # If decryption fails, assume the value is already plaintext.
         variables_read = []
         for variable in variables:
             value = None
             if variable.type == GENERIC_TYPE:
-                value = auth_utils.decrypt_api_key(variable.value, settings_service=self.settings_service)
-
+                try:
+                    value = auth_utils.decrypt_api_key(variable.value, settings_service=self.settings_service)
+                except Exception as e:  # noqa: BLE001
+                    logger.debug(
+                        f"Decryption of {variable.type} failed for variable '{variable.name}': {e}. Assuming plaintext."
+                    )
+                    value = variable.value
             variable_read = VariableRead.model_validate(variable, from_attributes=True)
             variable_read.value = value
             variables_read.append(variable_read)

src/backend/base/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "langflow-base"
-version = "0.1.4"
+version = "0.1.4.post1"
 description = "A Python package with a built-in web application"
 requires-python = ">=3.10,<3.13"
 license = "MIT"