Python: Support Bing Custom Search

python/semantic_kernel/connectors/search_engine/bing_connector.py

@@ -20,12 +20,16 @@
 
     _api_key: str
 
-    def __init__(self, api_key: str | None = None, env_file_path: str | None = None) -> None:
+    def __init__(
+        self, api_key: str | None = None, custom_config: str | None = None, env_file_path: str | None = None
+    ) -> None:
         """Initializes a new instance of the BingConnector class.
 
         Arguments:
             api_key {str | None}: The Bing Search API key. If provided, will override
                 the value in the env vars or .env file.
+            custom_config {str | None}: The Bing Custom Search instance's unique identifier.
+                If provided, will overide the value in the env vars or .env file.
             env_file_path {str | None}: The optional path to the .env file. If provided,
                 the settings are read from this file path location.
         """
@@ -39,6 +43,9 @@
             bing_settings.api_key.get_secret_value() if bing_settings and bing_settings.api_key else None
         )
         assert self._api_key, "API key cannot be 'None' or empty."
+        self._custom_config = custom_config or (
+            bing_settings.custom_config if bing_settings and bing_settings.custom_config else None
+        )
 
     async def search(self, query: str, num_results: int = 1, offset: int = 0) -> list[str]:
         """
@@ -66,8 +73,14 @@
                 params:\nquery: {query}\nnum_results: {num_results}\noffset: {offset}"
         )
 
-        _base_url = "https://api.bing.microsoft.com/v7.0/search"
-        _request_url = f"{_base_url}?q={urllib.parse.quote_plus(query)}&count={num_results}&offset={offset}"
+        _base_url = (
+            "https://api.bing.microsoft.com/v7.0/custom/search"
+            if self._custom_config
+            else "https://api.bing.microsoft.com/v7.0/search"
+        )
+        _request_url = f"{_base_url}?q={urllib.parse.quote_plus(query)}&count={num_results}&offset={offset}" + (
+            f"&customConfig={self._custom_config}" if self._custom_config else ""
+        )
 
         logger.info(f"Sending GET request to {_request_url}")
 

python/semantic_kernel/connectors/search_engine/bing_connector_settings.py

@@ -14,11 +14,13 @@ class BingSettings(BaseSettings):
 
     Optional settings for prefix 'BING_' are:
     - api_key: SecretStr - The Bing API key (Env var BING_API_KEY)
+    - custom_config: str - The Bing Custom Search instance's unique identifier (Env var BING_CUSTOM_CONFIG)
 
     """
 
     env_file_path: str | None = None
     api_key: SecretStr | None = None
+    custom_config: str | None = None
 
     class Config:
         env_prefix = "BING_"