优化了提示词

backend/app/api/routers/18时33分49秒_副本_events.py

@@ -0,0 +1,149 @@
+import json
+import asyncio
+import logging
+from typing import AsyncGenerator, Dict, Any, List, Optional
+from llama_index.core.callbacks.base import BaseCallbackHandler
+from llama_index.core.callbacks.schema import CBEventType
+from llama_index.core.tools.types import ToolOutput
+from pydantic import BaseModel
+
+
+logger = logging.getLogger(__name__)
+
+
+class CallbackEvent(BaseModel):
+    event_type: CBEventType
+    payload: Optional[Dict[str, Any]] = None
+    event_id: str = ""
+
+    def get_retrieval_message(self) -> dict | None:
+        if self.payload:
+            nodes = self.payload.get("nodes")
+            if nodes:
+                msg = f"根据查询检索到 {len(nodes)} 源文件"
+            else:
+                msg = f"查询检索中: '{self.payload.get('query_str')}'"
+            return {
+                "type": "events",
+                "data": {"title": msg},
+            }
+        else:
+            return None
+
+    def get_tool_message(self) -> dict | None:
+        func_call_args = self.payload.get("function_call")
+        if func_call_args is not None and "tool" in self.payload:
+            tool = self.payload.get("tool")
+            return {
+                "type": "events",
+                "data": {
+                    "title": f"调用工具 {tool.name} ，参数: {func_call_args}",
+                },
+            }
+
+    def _is_output_serializable(self, output: Any) -> bool:
+        try:
+            json.dumps(output)
+            return True
+        except TypeError:
+            return False
+
+    def get_agent_tool_response(self) -> dict | None:
+        response = self.payload.get("response")
+        if response is not None:
+            sources = response.sources
+            for source in sources:
+                # Return the tool response here to include the toolCall information
+                if isinstance(source, ToolOutput):
+                    if self._is_output_serializable(source.raw_output):
+                        output = source.raw_output
+                    else:
+                        output = source.content
+
+                    return {
+                        "type": "tools",
+                        "data": {
+                            "toolOutput": {
+                                "output": output,
+                                "isError": source.is_error,
+                            },
+                            "toolCall": {
+                                "id": None,  # There is no tool id in the ToolOutput
+                                "name": source.tool_name,
+                                "input": source.raw_input,
+                            },
+                        },
+                    }
+
+    def to_response(self):
+        try:
+            match self.event_type:
+                case "retrieve":
+                    return self.get_retrieval_message()
+                case "function_call":
+                    return self.get_tool_message()
+                case "agent_step":
+                    return self.get_agent_tool_response()
+                case _:
+                    return None
+        except Exception as e:
+            logger.error(f"转换回应时间时发生错误，原因: {e}")
+            return None
+
+
+class EventCallbackHandler(BaseCallbackHandler):
+    _aqueue: asyncio.Queue
+    is_done: bool = False
+
+    def __init__(
+        self,
+    ):
+        """Initialize the base callback handler."""
+        ignored_events = [
+            CBEventType.CHUNKING,
+            CBEventType.NODE_PARSING,
+            CBEventType.EMBEDDING,
+            CBEventType.LLM,
+            CBEventType.TEMPLATING,
+        ]
+        super().__init__(ignored_events, ignored_events)
+        self._aqueue = asyncio.Queue()
+
+    def on_event_start(
+        self,
+        event_type: CBEventType,
+        payload: Optional[Dict[str, Any]] = None,
+        event_id: str = "",
+        **kwargs: Any,
+    ) -> str:
+        event = CallbackEvent(event_id=event_id, event_type=event_type, payload=payload)
+        if event.to_response() is not None:
+            self._aqueue.put_nowait(event)
+
+    def on_event_end(
+        self,
+        event_type: CBEventType,
+        payload: Optional[Dict[str, Any]] = None,
+        event_id: str = "",
+        **kwargs: Any,
+    ) -> None:
+        event = CallbackEvent(event_id=event_id, event_type=event_type, payload=payload)
+        if event.to_response() is not None:
+            self._aqueue.put_nowait(event)
+
+    def start_trace(self, trace_id: Optional[str] = None) -> None:
+        """No-op."""
+
+    def end_trace(
+        self,
+        trace_id: Optional[str] = None,
+        trace_map: Optional[Dict[str, List[str]]] = None,
+    ) -> None:
+        """No-op."""
+
+    async def async_event_gen(self) -> AsyncGenerator[CallbackEvent, None]:
+        while not self._aqueue.empty() or not self.is_done:
+            try:
+                yield await asyncio.wait_for(self._aqueue.get(), timeout=0.1)
+            except asyncio.TimeoutError:
+                pass