feat(llm): 添加响应格式转换功能，支持JSON_SCHEMA输出

src/llm_models/model_client/openai_client.py

@@ -33,12 +33,34 @@ from ..exceptions import (
     EmptyResponseException,
 )
 from ..payload_content.message import Message, RoleType
-from ..payload_content.resp_format import RespFormat
+from ..payload_content.resp_format import RespFormat, RespFormatType
 from ..payload_content.tool_option import ToolOption, ToolParam, ToolCall
 
 logger = get_logger("llm_models")
 
 
+def _convert_response_format(response_format: RespFormat | None) -> Any:
+    """
+    转换响应格式 - 将内部RespFormat转换为OpenAI API所需格式
+    """
+    if response_format is None:
+        return NOT_GIVEN
+
+    if response_format.format_type == RespFormatType.TEXT:
+        return NOT_GIVEN
+
+    if response_format.format_type == RespFormatType.JSON_OBJ:
+        return {"type": "json_object"}
+
+    if response_format.format_type == RespFormatType.JSON_SCHEMA:
+        return {
+            "type": "json_schema",
+            "json_schema": response_format.schema,
+        }
+
+    return NOT_GIVEN
+
+
 def _convert_messages(messages: list[Message]) -> list[ChatCompletionMessageParam]:
     """
     转换消息格式 - 将消息转换为OpenAI API所需的格式
@@ -553,6 +575,7 @@ class OpenaiClient(BaseClient):
         messages: Iterable[ChatCompletionMessageParam] = _convert_messages(message_list)
         # 将tool_options转换为OpenAI API所需的格式
         tools: Iterable[ChatCompletionToolParam] = _convert_tool_options(tool_options) if tool_options else NOT_GIVEN  # type: ignore
+        openai_response_format = _convert_response_format(response_format)
 
         try:
             if model_info.force_stream_mode:
@@ -564,7 +587,7 @@ class OpenaiClient(BaseClient):
                         temperature=temperature,
                         max_tokens=max_tokens,
                         stream=True,
-                        response_format=NOT_GIVEN,
+                        response_format=openai_response_format,
                         extra_body=extra_params,
                     )
                 )
@@ -587,7 +610,7 @@ class OpenaiClient(BaseClient):
                         temperature=temperature,
                         max_tokens=max_tokens,
                         stream=False,
-                        response_format=NOT_GIVEN,
+                        response_format=openai_response_format,
                         extra_body=extra_params,
                     )
                 )