support load .env config from nacos (#18186)

api/configs/remote_settings_sources/nacos/__init__.py

@@ -0,0 +1,52 @@
+import logging
+import os
+from collections.abc import Mapping
+from typing import Any
+
+from pydantic.fields import FieldInfo
+
+from .http_request import NacosHttpClient
+
+logger = logging.getLogger(__name__)
+
+from configs.remote_settings_sources.base import RemoteSettingsSource
+
+from .utils import _parse_config
+
+
+class NacosSettingsSource(RemoteSettingsSource):
+    def __init__(self, configs: Mapping[str, Any]):
+        self.configs = configs
+        self.remote_configs: dict[str, Any] = {}
+        self.async_init()
+
+    def async_init(self):
+        data_id = os.getenv("DIFY_ENV_NACOS_DATA_ID", "dify-api-env.properties")
+        group = os.getenv("DIFY_ENV_NACOS_GROUP", "nacos-dify")
+        tenant = os.getenv("DIFY_ENV_NACOS_NAMESPACE", "")
+
+        params = {"dataId": data_id, "group": group, "tenant": tenant}
+        try:
+            content = NacosHttpClient().http_request("/nacos/v1/cs/configs", method="GET", headers={}, params=params)
+            self.remote_configs = self._parse_config(content)
+        except Exception as e:
+            logger.exception("[get-access-token] exception occurred")
+            raise
+
+    def _parse_config(self, content: str) -> dict:
+        if not content:
+            return {}
+        try:
+            return _parse_config(self, content)
+        except Exception as e:
+            raise RuntimeError(f"Failed to parse config: {e}")
+
+    def get_field_value(self, field: FieldInfo, field_name: str) -> tuple[Any, str, bool]:
+        if not isinstance(self.remote_configs, dict):
+            raise ValueError(f"remote configs is not dict, but {type(self.remote_configs)}")
+
+        field_value = self.remote_configs.get(field_name)
+        if field_value is None:
+            return None, field_name, False
+
+        return field_value, field_name, False