fix: update file handling functions (#4455)

Author: shaohuzhang1

apps/application/flow/step_node/tool_lib_node/impl/base_tool_lib_node.py

@@ -6,7 +6,8 @@
     @date：2024/8/8 17:49
     @desc:
 """
-import base64
+
+import ast
 import io
 import json
 import mimetypes
@@ -195,31 +196,23 @@ def execute(self, tool_lib_id, input_field_list, **kwargs) -> NodeResult:
         else:
             all_params = init_params_default_value | params
         if self.node.properties.get('kind') == 'data-source':
-            download_file_list = []
-            download_list = function_executor.exec_code(
-                tool_lib.code,
-                {**all_params, **self.workflow_params.get('data_source')},
-                function_name='get_down_file_list'
-            )
-            for item in download_list:
-                result = function_executor.exec_code(
-                    tool_lib.code,
-                    {**all_params, **self.workflow_params.get('data_source'),
-                     'download_item': item},
-                    function_name='download'
-                )
-                file_bytes = result.get('file_bytes', [])
-                chunks = []
-                for chunk in file_bytes:
-                    chunks.append(base64.b64decode(chunk))
-                file = bytes_to_uploaded_file(b''.join(chunks), result.get('name'))
-                file_url = self.upload_knowledge_file(file)
-                download_file_list.append({'file_id': file_url.split('/')[-1], 'name': result.get('name')})
-            all_params = {
-                **all_params, **self.workflow_params.get('data_source'),
-                'download_file_list': download_file_list
-            }
-            result = download_file_list
+            exist = function_executor.exist_function(tool_lib.code, 'get_download_file_list')
+            if exist:
+                download_file_list = []
+                download_list = function_executor.exec_code(tool_lib.code,
+                                                            {**all_params, **self.workflow_params.get('data_source')},
+                                                            function_name='get_download_file_list')
+                for item in download_list:
+                    result = function_executor.exec_code(tool_lib.code,
+                                                         {**all_params, **self.workflow_params.get('data_source'),
+                                                          'download_item': item},
+                                                         function_name='download')
+                    file = bytes_to_uploaded_file(ast.literal_eval(result.get('file_bytes')), result.get('name'))
+                    file_url = self.upload_knowledge_file(file)
+                    download_file_list.append({'file_id': file_url, 'name': result.get('name')})
+                result = download_file_list
+            else:
+                result = function_executor.exec_code(tool_lib.code, all_params)
         else:
             result = function_executor.exec_code(tool_lib.code, all_params)
         return NodeResult({'result': result},
@@ -237,7 +230,7 @@ def upload_knowledge_file(self, file):
             'meta': meta,
             'source_id': knowledge_id,
             'source_type': FileSourceType.KNOWLEDGE.value
-        }).upload()
+        }).upload().replace("./oss/file/", '')
         file.close()
         return file_url
 

apps/common/utils/tool_code.py

@@ -74,6 +74,47 @@ def init_sandbox_dir():
     except Exception as e:
         maxkb_logger.error(f'Exception: {e}', exc_info=True)
 
+    def exist_function(self, code_str, name):
+        _id = str(uuid.uuid7())
+        python_paths = CONFIG.get_sandbox_python_package_paths().split(',')
+        set_run_user = f'os.setgid({pwd.getpwnam(_run_user).pw_gid});os.setuid({pwd.getpwnam(_run_user).pw_uid});' if _enable_sandbox else ''
+        _exec_code = f"""
+try:
+    import os, sys, json
+    path_to_exclude = ['/opt/py3/lib/python3.11/site-packages', '/opt/maxkb-app/apps']
+    sys.path = [p for p in sys.path if p not in path_to_exclude]
+    sys.path += {python_paths}
+    locals_v={{}}
+    globals_v={{}}
+    {set_run_user}
+    os.environ.clear()
+    exec({dedent(code_str)!a}, globals_v, locals_v)
+    exec_result=locals_v.__contains__('{name}')
+    sys.stdout.write("\\n{_id}:")
+    json.dump({{'code':200,'msg':'success','data':exec_result}}, sys.stdout, default=str)
+except Exception as e:
+    if isinstance(e, MemoryError): e = Exception("Cannot allocate more memory: exceeded the limit of {_process_limit_mem_mb} MB.")
+    sys.stdout.write("\\n{_id}:")
+    json.dump({{'code':500,'msg':str(e),'data':False}}, sys.stdout, default=str)
+sys.stdout.flush()    
+        """
+        maxkb_logger.debug(f"Sandbox execute code: {_exec_code}")
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=True) as f:
+            f.write(_exec_code)
+            f.flush()
+            subprocess_result = self._exec(f.name)
+        if subprocess_result.returncode != 0:
+            raise Exception(subprocess_result.stderr or subprocess_result.stdout or "Unknown exception occurred")
+        lines = subprocess_result.stdout.splitlines()
+        result_line = [line for line in lines if line.startswith(_id)]
+        if not result_line:
+            maxkb_logger.error("\n".join(lines))
+            raise Exception("No result found.")
+        result = json.loads(result_line[-1].split(":", 1)[1])
+        if result.get('code') == 200:
+            return result.get('data')
+        raise Exception(result.get('msg'))
+
     def exec_code(self, code_str, keywords, function_name=None):
         _id = str(uuid.uuid7())
         action_function = f'({function_name !a}, locals_v.get({function_name !a}))' if function_name else 'locals_v.popitem()'
@@ -213,7 +254,7 @@ def get_tool_mcp_config(self, code, params):
             ],
             'cwd': _sandbox_path,
             'env': {
-               'LD_PRELOAD': f'{_sandbox_path}/lib/sandbox.so',
+                'LD_PRELOAD': f'{_sandbox_path}/lib/sandbox.so',
             },
             'transport': 'stdio',
         }