548 lines
23 KiB
Python
548 lines
23 KiB
Python
#
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# Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import binascii
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import logging
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import re
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import time
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from copy import deepcopy
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from timeit import default_timer as timer
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from api import settings
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from api.db import LLMType, ParserType, StatusEnum
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from api.db.db_models import DB, Dialog
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from api.db.services.common_service import CommonService
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from api.db.services.knowledgebase_service import KnowledgebaseService
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from api.db.services.llm_service import LLMBundle, TenantLLMService
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from rag.app.resume import forbidden_select_fields4resume
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from rag.app.tag import label_question
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from rag.nlp.search import index_name
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from rag.prompts import chunks_format, citation_prompt, kb_prompt, keyword_extraction, llm_id2llm_type, message_fit_in
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from rag.utils import num_tokens_from_string, rmSpace
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from .database import MINIO_CONFIG
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class DialogService(CommonService):
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model = Dialog
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@classmethod
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@DB.connection_context()
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def get_list(cls, tenant_id, page_number, items_per_page, orderby, desc, id, name):
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chats = cls.model.select()
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if id:
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chats = chats.where(cls.model.id == id)
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if name:
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chats = chats.where(cls.model.name == name)
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chats = chats.where((cls.model.tenant_id == tenant_id) & (cls.model.status == StatusEnum.VALID.value))
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if desc:
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chats = chats.order_by(cls.model.getter_by(orderby).desc())
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else:
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chats = chats.order_by(cls.model.getter_by(orderby).asc())
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chats = chats.paginate(page_number, items_per_page)
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return list(chats.dicts())
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def chat_solo(dialog, messages, stream=True):
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if llm_id2llm_type(dialog.llm_id) == "image2text":
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chat_mdl = LLMBundle(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
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else:
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chat_mdl = LLMBundle(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
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prompt_config = dialog.prompt_config
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tts_mdl = None
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if prompt_config.get("tts"):
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tts_mdl = LLMBundle(dialog.tenant_id, LLMType.TTS)
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msg = [{"role": m["role"], "content": re.sub(r"##\d+\$\$", "", m["content"])} for m in messages if m["role"] != "system"]
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if stream:
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last_ans = ""
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for ans in chat_mdl.chat_streamly(prompt_config.get("system", ""), msg, dialog.llm_setting):
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answer = ans
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delta_ans = ans[len(last_ans) :]
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if num_tokens_from_string(delta_ans) < 16:
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continue
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last_ans = answer
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yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans), "prompt": "", "created_at": time.time()}
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if delta_ans:
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yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans), "prompt": "", "created_at": time.time()}
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else:
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answer = chat_mdl.chat(prompt_config.get("system", ""), msg, dialog.llm_setting)
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user_content = msg[-1].get("content", "[content not available]")
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logging.debug("User: {}|Assistant: {}".format(user_content, answer))
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yield {"answer": answer, "reference": {}, "audio_binary": tts(tts_mdl, answer), "prompt": "", "created_at": time.time()}
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def chat(dialog, messages, stream=True, **kwargs):
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assert messages[-1]["role"] == "user", "The last content of this conversation is not from user."
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if not dialog.kb_ids:
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for ans in chat_solo(dialog, messages, stream):
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yield ans
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return
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chat_start_ts = timer()
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if llm_id2llm_type(dialog.llm_id) == "image2text":
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llm_model_config = TenantLLMService.get_model_config(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
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else:
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llm_model_config = TenantLLMService.get_model_config(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
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max_tokens = llm_model_config.get("max_tokens", 8192)
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check_llm_ts = timer()
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kbs = KnowledgebaseService.get_by_ids(dialog.kb_ids)
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embedding_list = list(set([kb.embd_id for kb in kbs]))
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if len(embedding_list) != 1:
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yield {"answer": "**ERROR**: Knowledge bases use different embedding models.", "reference": []}
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return {"answer": "**ERROR**: Knowledge bases use different embedding models.", "reference": []}
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embedding_model_name = embedding_list[0]
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retriever = settings.retrievaler
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questions = [m["content"] for m in messages if m["role"] == "user"][-3:]
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attachments = kwargs["doc_ids"].split(",") if "doc_ids" in kwargs else None
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if "doc_ids" in messages[-1]:
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attachments = messages[-1]["doc_ids"]
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create_retriever_ts = timer()
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embd_mdl = LLMBundle(dialog.tenant_id, LLMType.EMBEDDING, embedding_model_name)
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if not embd_mdl:
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raise LookupError("Embedding model(%s) not found" % embedding_model_name)
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bind_embedding_ts = timer()
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if llm_id2llm_type(dialog.llm_id) == "image2text":
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chat_mdl = LLMBundle(dialog.tenant_id, LLMType.IMAGE2TEXT, dialog.llm_id)
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else:
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chat_mdl = LLMBundle(dialog.tenant_id, LLMType.CHAT, dialog.llm_id)
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bind_llm_ts = timer()
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prompt_config = dialog.prompt_config
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field_map = KnowledgebaseService.get_field_map(dialog.kb_ids)
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tts_mdl = None
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if prompt_config.get("tts"):
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tts_mdl = LLMBundle(dialog.tenant_id, LLMType.TTS)
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# try to use sql if field mapping is good to go
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if field_map:
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logging.debug("Use SQL to retrieval:{}".format(questions[-1]))
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ans = use_sql(questions[-1], field_map, dialog.tenant_id, chat_mdl, prompt_config.get("quote", True))
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if ans:
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yield ans
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return
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for p in prompt_config["parameters"]:
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if p["key"] == "knowledge":
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continue
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if p["key"] not in kwargs and not p["optional"]:
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raise KeyError("Miss parameter: " + p["key"])
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if p["key"] not in kwargs:
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prompt_config["system"] = prompt_config["system"].replace("{%s}" % p["key"], " ")
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questions = questions[-1:]
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refine_question_ts = timer()
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rerank_mdl = None
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if dialog.rerank_id:
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rerank_mdl = LLMBundle(dialog.tenant_id, LLMType.RERANK, dialog.rerank_id)
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bind_reranker_ts = timer()
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generate_keyword_ts = bind_reranker_ts
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thought = ""
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kbinfos = {"total": 0, "chunks": [], "doc_aggs": []}
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if "knowledge" not in [p["key"] for p in prompt_config["parameters"]]:
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knowledges = []
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else:
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if prompt_config.get("keyword", False):
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questions[-1] += keyword_extraction(chat_mdl, questions[-1])
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generate_keyword_ts = timer()
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tenant_ids = list(set([kb.tenant_id for kb in kbs]))
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knowledges = []
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kbinfos = retriever.retrieval(
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" ".join(questions),
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embd_mdl,
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tenant_ids,
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dialog.kb_ids,
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1,
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dialog.top_n,
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dialog.similarity_threshold,
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dialog.vector_similarity_weight,
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doc_ids=attachments,
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top=dialog.top_k,
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aggs=False,
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rerank_mdl=rerank_mdl,
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rank_feature=label_question(" ".join(questions), kbs),
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)
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knowledges = kb_prompt(kbinfos, max_tokens)
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logging.debug("{}->{}".format(" ".join(questions), "\n->".join(knowledges)))
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retrieval_ts = timer()
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if not knowledges and prompt_config.get("empty_response"):
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empty_res = prompt_config["empty_response"]
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yield {"answer": empty_res, "reference": kbinfos, "prompt": "\n\n### Query:\n%s" % " ".join(questions), "audio_binary": tts(tts_mdl, empty_res)}
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return {"answer": prompt_config["empty_response"], "reference": kbinfos}
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kwargs["knowledge"] = "\n------\n" + "\n\n------\n\n".join(knowledges)
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gen_conf = dialog.llm_setting
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msg = [{"role": "system", "content": prompt_config["system"].format(**kwargs)}]
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prompt4citation = ""
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if knowledges and (prompt_config.get("quote", True) and kwargs.get("quote", True)):
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prompt4citation = citation_prompt()
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# 过滤掉 system 角色的消息(因为前面已经单独处理了系统消息)
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msg.extend([{"role": m["role"], "content": re.sub(r"##\d+\$\$", "", m["content"])} for m in messages if m["role"] != "system"])
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used_token_count, msg = message_fit_in(msg, int(max_tokens * 0.95))
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assert len(msg) >= 2, f"message_fit_in has bug: {msg}"
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prompt = msg[0]["content"]
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if "max_tokens" in gen_conf:
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gen_conf["max_tokens"] = min(gen_conf["max_tokens"], max_tokens - used_token_count)
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def decorate_answer(answer):
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nonlocal prompt_config, knowledges, kwargs, kbinfos, prompt, retrieval_ts, questions
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refs = []
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ans = answer.split("</think>")
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think = ""
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if len(ans) == 2:
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think = ans[0] + "</think>"
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answer = ans[1]
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cited_chunk_indices = set()
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inserted_images = {}
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processed_image_urls = set()
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if knowledges and (prompt_config.get("quote", True) and kwargs.get("quote", True)):
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# 获取引用的 chunk 索引
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if not re.search(r"##[0-9]+\$\$", answer):
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answer, idx = retriever.insert_citations(
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answer,
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[ck["content_ltks"] for ck in kbinfos["chunks"]],
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[ck["vector"] for ck in kbinfos["chunks"]],
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embd_mdl,
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tkweight=1 - dialog.vector_similarity_weight,
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vtweight=dialog.vector_similarity_weight,
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)
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cited_chunk_indices = idx
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else:
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for r in re.finditer(r"##([0-9]+)\$\$", answer):
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i = int(r.group(1))
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if i < len(kbinfos["chunks"]):
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cited_chunk_indices.add(i)
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# 处理图片插入
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def insert_image_markdown(match):
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idx = int(match.group(1))
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if idx >= len(kbinfos["chunks"]):
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return match.group(0)
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chunk = kbinfos["chunks"][idx]
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img_path = chunk.get("image_id")
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if not img_path:
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return match.group(0)
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protocol = "https" if MINIO_CONFIG.get("secure", False) else "http"
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img_url = f"{protocol}://{MINIO_CONFIG['visit_point']}/{img_path}"
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if img_url in processed_image_urls:
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return match.group(0)
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processed_image_urls.add(img_url)
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inserted_images[idx] = img_url
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# 插入图片，并限制最大宽度
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return f'{match.group(0)}\n\n<img src="{img_url}" alt="{img_url}" style="max-width:800px;">'
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# 用正则替换插图
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answer = re.sub(r"##(\d+)\$\$", insert_image_markdown, answer)
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# 清理引用文献信息
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idx = set([kbinfos["chunks"][int(i)]["doc_id"] for i in cited_chunk_indices])
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recall_docs = [d for d in kbinfos["doc_aggs"] if d["doc_id"] in idx]
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if not recall_docs:
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recall_docs = kbinfos["doc_aggs"]
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kbinfos["doc_aggs"] = recall_docs
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refs = deepcopy(kbinfos)
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for c in refs["chunks"]:
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if c.get("vector"):
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del c["vector"]
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# 特殊错误提示
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if "invalid key" in answer.lower() or "invalid api" in answer.lower():
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answer += " Please set LLM API-Key in 'User Setting -> Model providers -> API-Key'"
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# 时间信息拼接
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finish_chat_ts = timer()
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total_time_cost = (finish_chat_ts - chat_start_ts) * 1000
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check_llm_time_cost = (check_llm_ts - chat_start_ts) * 1000
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create_retriever_time_cost = (create_retriever_ts - check_llm_ts) * 1000
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bind_embedding_time_cost = (bind_embedding_ts - create_retriever_ts) * 1000
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bind_llm_time_cost = (bind_llm_ts - bind_embedding_ts) * 1000
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refine_question_time_cost = (refine_question_ts - bind_llm_ts) * 1000
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bind_reranker_time_cost = (bind_reranker_ts - refine_question_ts) * 1000
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generate_keyword_time_cost = (generate_keyword_ts - bind_reranker_ts) * 1000
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retrieval_time_cost = (retrieval_ts - generate_keyword_ts) * 1000
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generate_result_time_cost = (finish_chat_ts - retrieval_ts) * 1000
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prompt += "\n\n### Query:\n%s" % " ".join(questions)
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prompt = f"{prompt}\n\n - Total: {total_time_cost:.1f}ms\n - Check LLM: {check_llm_time_cost:.1f}ms\n - Create retriever: {create_retriever_time_cost:.1f}ms\n - Bind embedding: {bind_embedding_time_cost:.1f}ms\n - Bind LLM: {bind_llm_time_cost:.1f}ms\n - Tune question: {refine_question_time_cost:.1f}ms\n - Bind reranker: {bind_reranker_time_cost:.1f}ms\n - Generate keyword: {generate_keyword_time_cost:.1f}ms\n - Retrieval: {retrieval_time_cost:.1f}ms\n - Generate answer: {generate_result_time_cost:.1f}ms"
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return {"answer": think + answer, "reference": refs, "prompt": re.sub(r"\n", " \n", prompt), "created_at": time.time()}
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if stream:
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last_ans = "" # 记录上一次返回的完整回答
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answer = "" # 当前累计的完整回答
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for ans in chat_mdl.chat_streamly(prompt + prompt4citation, msg[1:], gen_conf):
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# 如果存在思考过程(thought)，移除相关标记
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if thought:
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ans = re.sub(r"<think>.*</think>", "", ans, flags=re.DOTALL)
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answer = ans
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# 计算新增的文本片段(delta)
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delta_ans = ans[len(last_ans) :]
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# 如果新增token太少(小于16)，跳过本次返回(避免频繁发送小片段)
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if num_tokens_from_string(delta_ans) < 16:
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continue
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last_ans = answer
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# 返回当前累计回答(包含思考过程)+新增片段)
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yield {"answer": thought + answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans)}
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delta_ans = answer[len(last_ans) :]
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if delta_ans:
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yield {"answer": thought + answer, "reference": {}, "audio_binary": tts(tts_mdl, delta_ans)}
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yield decorate_answer(thought + answer)
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else:
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answer = chat_mdl.chat(prompt + prompt4citation, msg[1:], gen_conf)
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user_content = msg[-1].get("content", "[content not available]")
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logging.debug("User: {}|Assistant: {}".format(user_content, answer))
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res = decorate_answer(answer)
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res["audio_binary"] = tts(tts_mdl, answer)
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yield res
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def use_sql(question, field_map, tenant_id, chat_mdl, quota=True):
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sys_prompt = "You are a Database Administrator. You need to check the fields of the following tables based on the user's list of questions and write the SQL corresponding to the last question."
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user_prompt = """
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Table name: {};
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Table of database fields are as follows:
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{}
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Question are as follows:
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{}
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Please write the SQL, only SQL, without any other explanations or text.
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""".format(index_name(tenant_id), "\n".join([f"{k}: {v}" for k, v in field_map.items()]), question)
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tried_times = 0
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def get_table():
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nonlocal sys_prompt, user_prompt, question, tried_times
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sql = chat_mdl.chat(sys_prompt, [{"role": "user", "content": user_prompt}], {"temperature": 0.06})
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sql = re.sub(r"<think>.*</think>", "", sql, flags=re.DOTALL)
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logging.debug(f"{question} ==> {user_prompt} get SQL: {sql}")
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sql = re.sub(r"[\r\n]+", " ", sql.lower())
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sql = re.sub(r".*select ", "select ", sql.lower())
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sql = re.sub(r" +", " ", sql)
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sql = re.sub(r"([;；]|```).*", "", sql)
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if sql[: len("select ")] != "select ":
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return None, None
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if not re.search(r"((sum|avg|max|min)\(|group by )", sql.lower()):
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if sql[: len("select *")] != "select *":
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sql = "select doc_id,docnm_kwd," + sql[6:]
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else:
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flds = []
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for k in field_map.keys():
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if k in forbidden_select_fields4resume:
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continue
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if len(flds) > 11:
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break
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flds.append(k)
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sql = "select doc_id,docnm_kwd," + ",".join(flds) + sql[8:]
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logging.debug(f"{question} get SQL(refined): {sql}")
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tried_times += 1
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return settings.retrievaler.sql_retrieval(sql, format="json"), sql
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tbl, sql = get_table()
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if tbl is None:
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return None
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if tbl.get("error") and tried_times <= 2:
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user_prompt = """
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Table name: {};
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Table of database fields are as follows:
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{}
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Question are as follows:
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{}
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Please write the SQL, only SQL, without any other explanations or text.
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The SQL error you provided last time is as follows:
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{}
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Error issued by database as follows:
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{}
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Please correct the error and write SQL again, only SQL, without any other explanations or text.
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""".format(index_name(tenant_id), "\n".join([f"{k}: {v}" for k, v in field_map.items()]), question, sql, tbl["error"])
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tbl, sql = get_table()
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logging.debug("TRY it again: {}".format(sql))
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logging.debug("GET table: {}".format(tbl))
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if tbl.get("error") or len(tbl["rows"]) == 0:
|
||
return None
|
||
|
||
docid_idx = set([ii for ii, c in enumerate(tbl["columns"]) if c["name"] == "doc_id"])
|
||
doc_name_idx = set([ii for ii, c in enumerate(tbl["columns"]) if c["name"] == "docnm_kwd"])
|
||
column_idx = [ii for ii in range(len(tbl["columns"])) if ii not in (docid_idx | doc_name_idx)]
|
||
|
||
# compose Markdown table
|
||
columns = (
|
||
"|" + "|".join([re.sub(r"(/.*|（[^（）]+）)", "", field_map.get(tbl["columns"][i]["name"], tbl["columns"][i]["name"])) for i in column_idx]) + ("|Source|" if docid_idx and docid_idx else "|")
|
||
)
|
||
|
||
line = "|" + "|".join(["------" for _ in range(len(column_idx))]) + ("|------|" if docid_idx and docid_idx else "")
|
||
|
||
rows = ["|" + "|".join([rmSpace(str(r[i])) for i in column_idx]).replace("None", " ") + "|" for r in tbl["rows"]]
|
||
rows = [r for r in rows if re.sub(r"[ |]+", "", r)]
|
||
if quota:
|
||
rows = "\n".join([r + f" ##{ii}$$ |" for ii, r in enumerate(rows)])
|
||
else:
|
||
rows = "\n".join([r + f" ##{ii}$$ |" for ii, r in enumerate(rows)])
|
||
rows = re.sub(r"T[0-9]{2}:[0-9]{2}:[0-9]{2}(\.[0-9]+Z)?\|", "|", rows)
|
||
|
||
if not docid_idx or not doc_name_idx:
|
||
logging.warning("SQL missing field: " + sql)
|
||
return {"answer": "\n".join([columns, line, rows]), "reference": {"chunks": [], "doc_aggs": []}, "prompt": sys_prompt}
|
||
|
||
docid_idx = list(docid_idx)[0]
|
||
doc_name_idx = list(doc_name_idx)[0]
|
||
doc_aggs = {}
|
||
for r in tbl["rows"]:
|
||
if r[docid_idx] not in doc_aggs:
|
||
doc_aggs[r[docid_idx]] = {"doc_name": r[doc_name_idx], "count": 0}
|
||
doc_aggs[r[docid_idx]]["count"] += 1
|
||
return {
|
||
"answer": "\n".join([columns, line, rows]),
|
||
"reference": {
|
||
"chunks": [{"doc_id": r[docid_idx], "docnm_kwd": r[doc_name_idx]} for r in tbl["rows"]],
|
||
"doc_aggs": [{"doc_id": did, "doc_name": d["doc_name"], "count": d["count"]} for did, d in doc_aggs.items()],
|
||
},
|
||
"prompt": sys_prompt,
|
||
}
|
||
|
||
|
||
def tts(tts_mdl, text):
|
||
if not tts_mdl or not text:
|
||
return
|
||
bin = b""
|
||
for chunk in tts_mdl.tts(text):
|
||
bin += chunk
|
||
return binascii.hexlify(bin).decode("utf-8")
|
||
|
||
|
||
def ask(question, kb_ids, tenant_id):
|
||
"""
|
||
处理用户搜索请求，从知识库中检索相关信息并生成回答
|
||
|
||
参数:
|
||
question (str): 用户的问题或查询
|
||
kb_ids (list): 知识库ID列表，指定要搜索的知识库
|
||
tenant_id (str): 租户ID，用于权限控制和资源隔离
|
||
|
||
流程:
|
||
1. 获取指定知识库的信息
|
||
2. 确定使用的嵌入模型
|
||
3. 根据知识库类型选择检索器(普通检索器或知识图谱检索器)
|
||
4. 初始化嵌入模型和聊天模型
|
||
5. 执行检索操作获取相关文档片段
|
||
6. 格式化知识库内容作为上下文
|
||
7. 构建系统提示词
|
||
8. 生成回答并添加引用标记
|
||
9. 流式返回生成的回答
|
||
|
||
返回:
|
||
generator: 生成器对象，产生包含回答和引用信息的字典
|
||
"""
|
||
|
||
kbs = KnowledgebaseService.get_by_ids(kb_ids)
|
||
embedding_list = list(set([kb.embd_id for kb in kbs]))
|
||
|
||
is_knowledge_graph = all([kb.parser_id == ParserType.KG for kb in kbs])
|
||
retriever = settings.retrievaler if not is_knowledge_graph else settings.kg_retrievaler
|
||
# 初始化嵌入模型，用于将文本转换为向量表示
|
||
embd_mdl = LLMBundle(tenant_id, LLMType.EMBEDDING, embedding_list[0])
|
||
# 初始化聊天模型，用于生成回答
|
||
chat_mdl = LLMBundle(tenant_id, LLMType.CHAT)
|
||
# 获取聊天模型的最大token长度，用于控制上下文长度
|
||
max_tokens = chat_mdl.max_length
|
||
# 获取所有知识库的租户ID并去重
|
||
tenant_ids = list(set([kb.tenant_id for kb in kbs]))
|
||
# 设置更小的相似度阈值以适配更好的效果(原始值0.1)
|
||
similarity_threshold = 0.01
|
||
# 调用检索器检索相关文档片段
|
||
kbinfos = retriever.retrieval(question, embd_mdl, tenant_ids, kb_ids, 1, 12, similarity_threshold, 0.3, aggs=False, rank_feature=label_question(question, kbs))
|
||
# 将检索结果格式化为提示词，并确保不超过模型最大token限制
|
||
knowledges = kb_prompt(kbinfos, max_tokens)
|
||
prompt = """
|
||
角色：你是一个聪明的助手。
|
||
任务：总结知识库中的信息并回答用户的问题。
|
||
要求与限制：
|
||
- 绝不要捏造内容，尤其是数字。
|
||
- 如果知识库中的信息与用户问题无关，**只需回答：对不起，未提供相关信息。
|
||
- 使用Markdown格式进行回答。
|
||
- 使用用户提问所用的语言作答。
|
||
- 绝不要捏造内容，尤其是数字。
|
||
|
||
### 来自知识库的信息
|
||
%s
|
||
|
||
以上是来自知识库的信息。
|
||
|
||
""" % "\n".join(knowledges)
|
||
msg = [{"role": "user", "content": question}]
|
||
|
||
# 生成完成后添加回答中的引用标记
|
||
def decorate_answer(answer):
|
||
nonlocal knowledges, kbinfos, prompt
|
||
answer, idx = retriever.insert_citations(answer, [ck["content_ltks"] for ck in kbinfos["chunks"]], [ck["vector"] for ck in kbinfos["chunks"]], embd_mdl, tkweight=0.7, vtweight=0.3)
|
||
idx = set([kbinfos["chunks"][int(i)]["doc_id"] for i in idx])
|
||
recall_docs = [d for d in kbinfos["doc_aggs"] if d["doc_id"] in idx]
|
||
if not recall_docs:
|
||
recall_docs = kbinfos["doc_aggs"]
|
||
kbinfos["doc_aggs"] = recall_docs
|
||
refs = deepcopy(kbinfos)
|
||
for c in refs["chunks"]:
|
||
if c.get("vector"):
|
||
del c["vector"]
|
||
|
||
if answer.lower().find("invalid key") >= 0 or answer.lower().find("invalid api") >= 0:
|
||
answer += " Please set LLM API-Key in 'User Setting -> Model Providers -> API-Key'"
|
||
refs["chunks"] = chunks_format(refs)
|
||
return {"answer": answer, "reference": refs}
|
||
|
||
answer = ""
|
||
for ans in chat_mdl.chat_streamly(prompt, msg, {"temperature": 0.1}):
|
||
answer = ans
|
||
yield {"answer": answer, "reference": {}}
|
||
yield decorate_answer(answer)
|