Adding http_request to serving to call external-function

Signed-off-by: Sunish Sheth <sunishsheth2009@gmail.com>

databricks/sdk/mixins/open_ai_client.py

@@ -1,4 +1,9 @@
-from databricks.sdk.service.serving import ServingEndpointsAPI
+import json as js
+from typing import Dict, Optional
+
+from databricks.sdk.service.serving import (ExternalFunctionRequestHttpMethod,
+                                            ExternalFunctionResponse,
+                                            ServingEndpointsAPI)
 
 
 class ServingEndpointsExt(ServingEndpointsAPI):
@@ -50,3 +55,40 @@ def get_langchain_chat_open_ai_client(self, model):
             openai_api_base=self._api._cfg.host + "/serving-endpoints",
             api_key="no-token", # Passing in a placeholder to pass validations, this will not be used
             http_client=self._get_authorized_http_client())
+
+    def http_request(self,
+                     conn: str,
+                     method: ExternalFunctionRequestHttpMethod,
+                     path: str,
+                     *,
+                     headers: Optional[Dict[str, str]] = None,
+                     json: Optional[Dict[str, str]] = None,
+                     params: Optional[Dict[str, str]] = None) -> ExternalFunctionResponse:
+        """Make external services call using the credentials stored in UC Connection.
+
+        **NOTE:** Experimental: This API may change or be removed in a future release without warning.
+
+        :param conn: str
+          The connection name to use. This is required to identify the external connection.
+        :param method: :class:`ExternalFunctionRequestHttpMethod`
+          The HTTP method to use (e.g., 'GET', 'POST'). This is required.
+        :param path: str
+          The relative path for the API endpoint. This is required.
+        :param headers: Dict[str,str] (optional)
+          Additional headers for the request. If not provided, only auth headers from connections would be
+          passed.
+        :param json: Dict[str,str] (optional)
+          JSON payload for the request.
+        :param params: Dict[str,str] (optional)
+          Query parameters for the request.
+
+        :returns: :class:`ExternalFunctionResponse`
+        """
+
+        return super.http_request(connection_name=conn,
+                                  method=method,
+                                  path=path,
+                                  headers=js.dumps(headers),
+                                  json=js.dumps(json),
+                                  params=js.dumps(params),
+                                  )