fix(sandbox): treat non-zero exit codes as errors instead of relying only on stderr

api/app/core/workflow/nodes/code/config.py

@@ -39,7 +39,7 @@ class CodeNodeConfig(BaseNodeConfig):
         description="output variables"
     )
 
-    code_content: str = Field(
+    code: str = Field(
         default="",
         description="code content"
     )

api/app/core/workflow/nodes/code/node.py

@@ -47,7 +47,7 @@ class CodeNode(BaseNode):
             result = {}
             for output in self.typed_config.output_variables:
                 value = exec_result.get(output.name)
-                if not value:
+                if value is None:
                     raise RuntimeError(f"Return value {output.name} does not exist")
                 match output.type:
                     case VariableType.STRING:
@@ -104,7 +104,7 @@ class CodeNode(BaseNode):
                     "x-api-key": 'redbear-sandbox'
                 },
                 json={
-                    "language": "python3",
+                    "language": self.typed_config.language,
                     "code": base64.b64encode(final_script.encode("utf-8")).decode("utf-8"),
                     "options": {
                         "enable_network": True

sandbox/app/services/python_service.py

@@ -37,7 +37,7 @@ async def run_python_code(code: str, preload: str, options: RunnerOptions):
         if result.exit_code == -signal.SIGSYS:
             return error_response(31, "sandbox security policy violation")
 
-        if result.stderr:
+        if result.stderr and result.exit_code != 0:
             return error_response(500, result.stderr)
         
         return success_response(RunCodeResponse(