feat: structured prompt data interaction between dbgpt-server and llm-server

pilot/model/llm_out/chatglm_llm.py

@@ -8,6 +8,11 @@ import copy
 import torch
 
 from pilot.conversation import ROLE_ASSISTANT, ROLE_USER
+from pilot.scene.base_message import ModelMessage, _parse_model_messages
+
+# TODO move sep to scene prompt of model
+_CHATGLM_SEP = "\n"
+_CHATGLM2_SEP = "\n\n"
 
 
 @torch.inference_mode()
@@ -32,42 +37,20 @@ def chatglm_generate_stream(
         generate_kwargs["temperature"] = temperature
 
     # TODO, Fix this
-    print(prompt)
+    # print(prompt)
-    messages = prompt.split(stop)
+    # messages = prompt.split(stop)
-    #
+    messages: List[ModelMessage] = params["messages"]
-    # # Add history conversation
+    query, system_messages, hist = _parse_model_messages(messages)
-    hist = [HistoryEntry()]
+    system_messages_str = "".join(system_messages)
-    system_messages = []
-    for message in messages[:-2]:
-        if len(message) <= 0:
-            continue
-        if "human:" in message:
-            hist[-1].add_question(message.split("human:")[1])
-        elif "system:" in message:
-            msg = message.split("system:")[1]
-            hist[-1].add_question(msg)
-            system_messages.append(msg)
-        elif "ai:" in message:
-            hist[-1].add_answer(message.split("ai:")[1])
-            hist.append(HistoryEntry())
-        else:
-            # TODO
-            # hist[-1].add_question(message.split("system:")[1])
-            # once_conversation.append(f"""###system:{message} """)
-            pass
-
-    try:
-        query = messages[-2].split("human:")[1]
-    except IndexError:
-        query = messages[-3].split("human:")[1]
-    hist = build_history(hist)
     if not hist:
         # No history conversation, but has system messages, merge to user`s query
-        query = prompt_adaptation(system_messages, query)
+        query = prompt_adaptation(system_messages_str, query)
+    else:
+        # history exist, add system message to head of history
+        hist[0][0] = system_messages_str + _CHATGLM2_SEP + hist[0][0]
+
     print("Query Message: ", query)
     print("hist: ", hist)
-    # output = ""
-    # i = 0
 
     for i, (response, new_hist) in enumerate(
         model.stream_chat(tokenizer, query, hist, **generate_kwargs)
@@ -103,10 +86,10 @@ def build_history(hist: List[HistoryEntry]) -> List[List[str]]:
     return list(filter(lambda hl: hl is not None, map(lambda h: h.to_list(), hist)))
 
 
-def prompt_adaptation(system_messages: List[str], human_message: str) -> str:
+def prompt_adaptation(system_messages_str: str, human_message: str) -> str:
-    if not system_messages:
+    if not system_messages_str or system_messages_str == "":
         return human_message
-    system_messages_str = " ".join(system_messages)
+    # TODO Multi-model prompt adaptation
     adaptation_rules = [
         r"Question:\s*{}\s*",  # chat_db scene
         r"Goals:\s*{}\s*",  # chat_execution
@@ -119,4 +102,4 @@ def prompt_adaptation(system_messages: List[str], human_message: str) -> str:
         if re.search(pattern, system_messages_str):
             return system_messages_str
     # https://huggingface.co/THUDM/chatglm2-6b/blob/e186c891cf64310ac66ef10a87e6635fa6c2a579/modeling_chatglm.py#L926
-    return f"{system_messages_str}\n\n问：{human_message}\n\n答："
+    return system_messages_str + _CHATGLM2_SEP + human_message

pilot/model/llm_out/proxy_llm.py

@@ -3,8 +3,10 @@
 
 import json
 import requests
+from typing import List
 from pilot.configs.config import Config
 from pilot.conversation import ROLE_ASSISTANT, ROLE_USER
+from pilot.scene.base_message import ModelMessage
 
 CFG = Config()
 
@@ -20,36 +22,17 @@ def proxyllm_generate_stream(model, tokenizer, params, device, context_len=2048)
         "Token": CFG.proxy_api_key,
     }
 
-    messages = prompt.split(stop)
+    messages: List[ModelMessage] = params["messages"]
     # Add history conversation
     for message in messages:
-        if len(message) <= 0:
+        if message.role == "human":
-            continue
+            history.append({"role": "user", "content": message.content})
-        if "human:" in message:
+        elif message.role == "system":
-            history.append(
+            history.append({"role": "system", "content": message.content})
-                {"role": "user", "content": message.split("human:")[1]},
+        elif message.role == "ai":
-            )
+            history.append({"role": "assistant", "content": message.content})
-        elif "system:" in message:
-            history.append(
-                {
-                    "role": "system",
-                    "content": message.split("system:")[1],
-                }
-            )
-        elif "ai:" in message:
-            history.append(
-                {
-                    "role": "assistant",
-                    "content": message.split("ai:")[1],
-                }
-            )
         else:
-            history.append(
+            pass
-                {
-                    "role": "system",
-                    "content": message,
-                }
-            )
 
     # Move the last user's information to the end
     temp_his = history[::-1]

pilot/scene/base_chat.py

@@ -37,6 +37,7 @@ from pilot.scene.base_message import (
     HumanMessage,
     AIMessage,
     ViewMessage,
+    ModelMessage,
 )
 from pilot.configs.config import Config
 
@@ -116,6 +117,7 @@ class BaseChat(ABC):
         payload = {
             "model": self.llm_model,
             "prompt": self.generate_llm_text(),
+            "messages": self.generate_llm_messages(),
             "temperature": float(self.prompt_template.temperature),
             "max_new_tokens": int(self.prompt_template.max_new_tokens),
             "stop": self.prompt_template.sep,
@@ -244,24 +246,62 @@ class BaseChat(ABC):
         text += self.__load_user_message()
         return text
 
-    def __load_system_message(self):
+    def generate_llm_messages(self) -> List[ModelMessage]:
+        """
+        Structured prompt messages interaction between dbgpt-server and llm-server
+        See https://github.com/csunny/DB-GPT/issues/328
+        """
+        messages = []
+        ### Load scene setting or character definition as system message
+        if self.prompt_template.template_define:
+            messages.append(
+                ModelMessage(
+                    role="system",
+                    content=self.prompt_template.template_define,
+                )
+            )
+        ### Load prompt
+        messages += self.__load_system_message(str_message=False)
+        ### Load examples
+        messages += self.__load_example_messages(str_message=False)
+
+        ### Load History
+        messages += self.__load_histroy_messages(str_message=False)
+
+        ### Load User Input
+        messages += self.__load_user_message(str_message=False)
+        return messages
+
+    def __load_system_message(self, str_message: bool = True):
         system_convs = self.current_message.get_system_conv()
         system_text = ""
+        system_messages = []
         for system_conv in system_convs:
             system_text += (
                 system_conv.type + ":" + system_conv.content + self.prompt_template.sep
             )
-        return system_text
+            system_messages.append(
+                ModelMessage(role=system_conv.type, content=system_conv.content)
+            )
+        return system_text if str_message else system_messages
 
-    def __load_user_message(self):
+    def __load_user_message(self, str_message: bool = True):
         user_conv = self.current_message.get_user_conv()
+        user_messages = []
         if user_conv:
-            return user_conv.type + ":" + user_conv.content + self.prompt_template.sep
+            user_text = (
+                user_conv.type + ":" + user_conv.content + self.prompt_template.sep
+            )
+            user_messages.append(
+                ModelMessage(role=user_conv.type, content=user_conv.content)
+            )
+            return user_text if str_message else user_messages
         else:
             raise ValueError("Hi! What do you want to talk about？")
 
-    def __load_example_messages(self):
+    def __load_example_messages(self, str_message: bool = True):
         example_text = ""
+        example_messages = []
         if self.prompt_template.example_selector:
             for round_conv in self.prompt_template.example_selector.examples():
                 for round_message in round_conv["messages"]:
@@ -269,16 +309,22 @@ class BaseChat(ABC):
                         SystemMessage.type,
                         ViewMessage.type,
                     ]:
+                        message_type = round_message["type"]
+                        message_content = round_message["data"]["content"]
                         example_text += (
-                            round_message["type"]
+                            message_type
                             + ":"
-                            + round_message["data"]["content"]
+                            + message_content
                             + self.prompt_template.sep
                         )
-        return example_text
+                        example_messages.append(
+                            ModelMessage(role=message_type, content=message_content)
+                        )
+        return example_text if str_message else example_messages
 
-    def __load_histroy_messages(self):
+    def __load_histroy_messages(self, str_message: bool = True):
         history_text = ""
+        history_messages = []
         if self.prompt_template.need_historical_messages:
             if self.history_message:
                 logger.info(
@@ -290,12 +336,17 @@ class BaseChat(ABC):
                         ViewMessage.type,
                         SystemMessage.type,
                     ]:
+                        message_type = first_message["type"]
+                        message_content = first_message["data"]["content"]
                         history_text += (
-                            first_message["type"]
+                            message_type
                             + ":"
-                            + first_message["data"]["content"]
+                            + message_content
                             + self.prompt_template.sep
                         )
+                        history_messages.append(
+                            ModelMessage(role=message_type, content=message_content)
+                        )
 
                 index = self.chat_retention_rounds - 1
                 for round_conv in self.history_message[-index:]:
@@ -304,12 +355,17 @@ class BaseChat(ABC):
                             SystemMessage.type,
                             ViewMessage.type,
                         ]:
+                            message_type = round_message["type"]
+                            message_content = round_message["data"]["content"]
                             history_text += (
-                                round_message["type"]
+                                message_type
                                 + ":"
-                                + round_message["data"]["content"]
+                                + message_content
                                 + self.prompt_template.sep
                             )
+                            history_messages.append(
+                                ModelMessage(role=message_type, content=message_content)
+                            )
 
             else:
                 ### user all history
@@ -320,14 +376,19 @@ class BaseChat(ABC):
                             SystemMessage.type,
                             ViewMessage.type,
                         ]:
+                            message_type = message["type"]
+                            message_content = message["data"]["content"]
                             history_text += (
-                                message["type"]
+                                message_type
                                 + ":"
-                                + message["data"]["content"]
+                                + message_content
                                 + self.prompt_template.sep
                             )
+                            history_messages.append(
+                                ModelMessage(role=message_type, content=message_content)
+                            )
 
-        return history_text
+        return history_text if str_message else history_messages
 
     def current_ai_response(self) -> str:
         for message in self.current_message.messages:

pilot/scene/base_message.py

@@ -6,6 +6,7 @@ from typing import (
     Dict,
     Generic,
     List,
+    Tuple,
     NamedTuple,
     Optional,
     Sequence,
@@ -80,6 +81,14 @@ class SystemMessage(BaseMessage):
         return "system"
 
 
+class ModelMessage(BaseModel):
+    """Type of message that interaction between dbgpt-server and llm-server"""
+
+    """Similar to openai's message format"""
+    role: str
+    content: str
+
+
 class Generation(BaseModel):
     """Output of a single generation."""
 
@@ -146,3 +155,35 @@ def _message_from_dict(message: dict) -> BaseMessage:
 
 def messages_from_dict(messages: List[dict]) -> List[BaseMessage]:
     return [_message_from_dict(m) for m in messages]
+
+
+def _parse_model_messages(
+    messages: List[ModelMessage],
+) -> Tuple[str, List[str], List[List[str, str]]]:
+    """ "
+    Parameters:
+        messages: List of message from base chat.
+    Returns:
+        A tuple contains user prompt, system message list and history message list
+        str: user prompt
+        List[str]: system messages
+        List[List[str]]: history message of user and assistant
+    """
+    user_prompt = ""
+    system_messages: List[str] = []
+    history_messages: List[List[str]] = [[]]
+
+    for message in messages[:-1]:
+        if message.role == "human":
+            history_messages[-1].append(message.content)
+        elif message.role == "system":
+            system_messages.append(message.content)
+        elif message.role == "ai":
+            history_messages[-1].append(message.content)
+            history_messages.append([])
+    if messages[-1].role != "human":
+        raise ValueError("Hi! What do you want to talk about？")
+    # Keep message pair of [user message, assistant message]
+    history_messages = list(filter(lambda x: len(x) == 2, history_messages))
+    user_prompt = messages[-1].content
+    return user_prompt, system_messages, history_messages

pilot/server/llmserver.py

@@ -5,6 +5,7 @@ import asyncio
 import json
 import os
 import sys
+from typing import List
 
 import uvicorn
 from fastapi import BackgroundTasks, FastAPI, Request
@@ -24,6 +25,7 @@ from pilot.configs.model_config import *
 from pilot.model.llm_out.vicuna_base_llm import get_embeddings
 from pilot.model.loader import ModelLoader
 from pilot.server.chat_adapter import get_llm_chat_adapter
+from pilot.scene.base_message import ModelMessage
 
 CFG = Config()
 
@@ -128,6 +130,7 @@ app = FastAPI()
 
 
 class PromptRequest(BaseModel):
+    messages: List[ModelMessage]
     prompt: str
     temperature: float
     max_new_tokens: int
@@ -170,6 +173,7 @@ async def api_generate_stream(request: Request):
 @app.post("/generate")
 def generate(prompt_request: PromptRequest) -> str:
     params = {
+        "messages": prompt_request.messages,
         "prompt": prompt_request.prompt,
         "temperature": prompt_request.temperature,
         "max_new_tokens": prompt_request.max_new_tokens,