fix 文档管理模块 & 法规对话模块

backend/app/services/llm/deepseek_client.py

@@ -95,6 +95,57 @@ class DeepSeekClient(BaseLLMClient):
                 error=str(e)
             )
 
+    def stream_chat(
+        self,
+        messages: List[Dict[str, str]],
+        max_tokens: Optional[int] = None,
+        temperature: Optional[float] = None,
+        **kwargs
+    ):
+        """Stream chat for the Deep Seek Client instance."""
+        try:
+            payload = {
+                "model": self.config.model,
+                "messages": messages,
+                "max_tokens": max_tokens or self.config.max_tokens,
+                "temperature": temperature or self.config.temperature,
+                "top_p": kwargs.get("top_p", self.config.top_p),
+                "stream": True
+            }
+
+            with self._client.stream("POST", "/chat/completions", json=payload) as response:
+                response.raise_for_status()
+                for line in response.iter_lines():
+                    if not line or line.startswith(b":"):
+                        continue
+
+                    line_str = line.decode("utf-8").strip()
+                    if not line_str.startswith("data: "):
+                        continue
+
+                    data_str = line_str[6:]
+                    if data_str == "[DONE]":
+                        break
+
+                    try:
+                        import json
+                        data = json.loads(data_str)
+                        choices = data.get("choices", [])
+                        if choices:
+                            delta = choices[0].get("delta", {})
+                            content = delta.get("content", "")
+                            if content:
+                                yield content
+                    except json.JSONDecodeError:
+                        continue
+
+        except httpx.HTTPStatusError as e:
+            logger.error(f"DeepSeek Stream API错误: {e.response.status_code}")
+            yield ""
+        except Exception as e:
+            logger.error(f"DeepSeek Stream调用失败: {e}")
+            yield ""
+
     def get_available_models(self) -> List[str]:
         """Return available models for the Deep Seek Client instance."""
         return self.SUPPORTED_MODELS