import io
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import json
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import fitz
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from Log import logger
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from app.config.agent_base_url import RG_CHAT_DIALOG, DF_CHAT_AGENT, DF_CHAT_PARAMETERS, RG_CHAT_SESSIONS, \
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DF_CHAT_WORKFLOW, DF_UPLOAD_FILE
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from app.config.config import settings
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from app.config.const import *
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from app.models import DialogModel, ApiTokenModel, UserTokenModel
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from app.models.v2.session_model import ChatSessionDao, ChatData
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from app.service.v2.app_driver.chat_agent import ChatAgent
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from app.service.v2.app_driver.chat_data import ChatBaseApply
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from app.service.v2.app_driver.chat_dialog import ChatDialog
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from app.service.v2.app_driver.chat_workflow import ChatWorkflow
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from docx import Document
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from dashscope import get_tokenizer # dashscope版本 >= 1.14.0
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async def update_session_log(db, session_id: str, message: dict, conversation_id: str):
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await ChatSessionDao(db).update_session_by_id(
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session_id=session_id,
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session=None,
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message=message,
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conversation_id=conversation_id
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)
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async def add_session_log(db, session_id: str, question: str, chat_id: str, user_id, event_type: str,
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conversation_id: str, agent_type):
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try:
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session = await ChatSessionDao(db).update_or_insert_by_id(
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session_id=session_id,
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name=question[:255],
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agent_id=chat_id,
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agent_type=agent_type,
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tenant_id=user_id,
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message={"role": "user", "content": question},
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conversation_id=conversation_id,
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event_type=event_type
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)
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return session
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except Exception as e:
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logger.error(e)
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return None
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async def get_app_token(db, app_id):
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app_token = db.query(UserTokenModel).filter_by(id=app_id).first()
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if app_token:
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return app_token.access_token
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return ""
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async def get_chat_token(db, app_id):
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app_token = db.query(ApiTokenModel).filter_by(app_id=app_id).first()
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if app_token:
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return app_token.token
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return ""
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async def add_chat_token(db, data):
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try:
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api_token = ApiTokenModel(**data)
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db.add(api_token)
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db.commit()
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except Exception as e:
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logger.error(e)
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async def get_chat_info(db, chat_id: str):
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return db.query(DialogModel).filter_by(id=chat_id, status=Dialog_STATSU_ON).first()
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async def get_chat_object(mode):
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if mode == workflow_chat:
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url = settings.dify_base_url + DF_CHAT_WORKFLOW
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return ChatWorkflow(), url
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else:
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url = settings.dify_base_url + DF_CHAT_AGENT
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return ChatAgent(), url
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async def service_chat_dialog(db, chat_id: str, question: str, session_id: str, user_id, mode: str):
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conversation_id = ""
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token = await get_chat_token(db, rg_api_token)
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url = settings.fwr_base_url + RG_CHAT_DIALOG.format(chat_id)
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chat = ChatDialog()
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session = await add_session_log(db, session_id, question, chat_id, user_id, mode, session_id, 1)
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if session:
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conversation_id = session.conversation_id
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message = {"role": "assistant", "answer": "", "reference": {}}
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try:
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async for ans in chat.chat_completions(url, await chat.request_data(question, conversation_id),
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await chat.get_headers(token)):
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data = {}
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error = ""
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status = http_200
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if ans.get("code", None) == 102:
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error = ans.get("message", "error！")
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status = http_400
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event = smart_message_error
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else:
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if isinstance(ans.get("data"), bool) and ans.get("data") is True:
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event = smart_message_end
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else:
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data = ans.get("data", {})
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# conversation_id = data.get("session_id", "")
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if "session_id" in data:
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del data["session_id"]
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message = data
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event = smart_message_cover
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message_str = "data: " + json.dumps(
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{"event": event, "data": data, "error": error, "status": status, "session_id": session_id},
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ensure_ascii=False) + "\n\n"
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for i in range(0, len(message_str), max_chunk_size):
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chunk = message_str[i:i + max_chunk_size]
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# print(chunk)
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yield chunk # 发送分块消息
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except Exception as e:
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logger.error(e)
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try:
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yield "data: " + json.dumps({"message": smart_message_error,
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"error": "\n**ERROR**: " + str(e), "status": http_500},
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ensure_ascii=False) + "\n\n"
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except:
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...
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finally:
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message["role"] = "assistant"
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await update_session_log(db, session_id, message, conversation_id)
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async def data_process(data):
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if isinstance(data, str):
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return data.replace("dify", "smart")
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elif isinstance(data, dict):
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for k in list(data.keys()):
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if isinstance(k, str) and "dify" in k:
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new_k = k.replace("dify", "smart")
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data[new_k] = await data_process(data[k])
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del data[k]
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else:
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data[k] = await data_process(data[k])
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return data
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elif isinstance(data, list):
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for i in range(len(data)):
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data[i] = await data_process(data[i])
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return data
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else:
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return data
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async def service_chat_workflow(db, chat_id: str, chat_data: ChatData, session_id: str, user_id, mode: str):
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conversation_id = ""
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answer_event = ""
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answer_agent = ""
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answer_workflow = ""
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download_url = ""
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message_id = ""
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task_id = ""
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error = ""
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files = []
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node_list = []
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token = await get_chat_token(db, chat_id)
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chat, url = await get_chat_object(mode)
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if hasattr(chat_data, "query"):
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query = chat_data.query
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else:
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query = "start new workflow"
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session = await add_session_log(db, session_id,query if query else "start new conversation", chat_id, user_id, mode, conversation_id, 3)
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if session:
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conversation_id = session.conversation_id
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try:
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async for ans in chat.chat_completions(url,
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await chat.request_data(query, conversation_id, str(user_id), chat_data),
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await chat.get_headers(token)):
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data = {}
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status = http_200
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conversation_id = ans.get("conversation_id")
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task_id = ans.get("task_id")
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if ans.get("event") == message_error:
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error = ans.get("message", "参数异常！")
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status = http_400
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event = smart_message_error
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elif ans.get("event") == message_agent:
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data = {"answer": ans.get("answer", ""), "id": ans.get("message_id", "")}
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answer_agent += ans.get("answer", "")
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message_id = ans.get("message_id", "")
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event = smart_message_stream
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elif ans.get("event") == message_event:
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data = {"answer": ans.get("answer", ""), "id": ans.get("message_id", "")}
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answer_event += ans.get("answer", "")
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message_id = ans.get("message_id", "")
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event = smart_message_stream
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elif ans.get("event") == message_file:
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data = {"url": ans.get("url", ""), "id": ans.get("id", ""),
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"type": ans.get("type", "")}
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files.append(data)
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event = smart_message_file
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elif ans.get("event") in [workflow_started, node_started, node_finished]:
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data = ans.get("data", {})
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data["inputs"] = await data_process(data.get("inputs", {}))
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data["outputs"] = await data_process(data.get("outputs", {}))
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data["files"] = await data_process(data.get("files", []))
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data["process_data"] = ""
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if data.get("status") == "failed":
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status = http_500
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error = data.get("error", "")
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node_list.append(ans)
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event = [smart_workflow_started, smart_node_started, smart_node_finished][
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[workflow_started, node_started, node_finished].index(ans.get("event"))]
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elif ans.get("event") == workflow_finished:
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data = ans.get("data", {})
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answer_workflow = data.get("outputs", {}).get("output")
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download_url = data.get("outputs", {}).get("download_url")
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event = smart_workflow_finished
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if data.get("status") == "failed":
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status = http_500
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error = data.get("error", "")
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node_list.append(ans)
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elif ans.get("event") == message_end:
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event = smart_message_end
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else:
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continue
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yield "data: " + json.dumps(
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{"event": event, "data": data, "error": error, "status": status, "task_id": task_id,
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"session_id": session_id},
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ensure_ascii=False) + "\n\n"
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except Exception as e:
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logger.error(e)
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try:
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yield "data: " + json.dumps({"message": smart_message_error,
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"error": "\n**ERROR**: " + str(e), "status": http_500},
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ensure_ascii=False) + "\n\n"
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except:
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...
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finally:
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await update_session_log(db, session_id, {"role": "assistant", "answer": answer_event or answer_agent or answer_workflow or error,
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"download_url":download_url,
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"node_list": node_list, "task_id": task_id, "id": message_id,
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"error": error}, conversation_id)
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async def service_chat_basic(db, chat_id: str, chat_data: ChatData, session_id: str, user_id, mode: str):
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...
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async def service_chat_parameters(db, chat_id, user_id):
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chat_info = db.query(DialogModel).filter_by(id=chat_id).first()
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if not chat_info:
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return {}
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return chat_info.parameters
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async def service_chat_sessions(db, chat_id, name):
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token = await get_chat_token(db, rg_api_token)
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if not token:
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return {}
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url = settings.fwr_base_url + RG_CHAT_SESSIONS.format(chat_id)
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chat = ChatDialog()
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return await chat.chat_sessions(url, {"name": name}, await chat.get_headers(token))
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async def service_chat_sessions_list(db, chat_id, current, page_size, user_id, keyword):
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total, session_list = await ChatSessionDao(db).get_session_list(
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user_id=user_id,
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agent_id=chat_id,
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keyword=keyword,
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page=current,
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page_size=page_size
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)
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return json.dumps({"total":total, "rows": [session.to_dict() for session in session_list]})
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async def service_chat_session_log(db, session_id):
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session_log = await ChatSessionDao(db).get_session_by_id(session_id)
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return json.dumps(session_log.log_to_json())
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async def service_chat_upload(db, chat_id, file, user_id):
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files = []
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token = await get_chat_token(db, chat_id)
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if not token:
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return files
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url = settings.dify_base_url + DF_UPLOAD_FILE
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chat = ChatBaseApply()
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for f in file:
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try:
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file_content = await f.read()
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file_upload = await chat.chat_upload(url, {"file": (f.filename, file_content)}, {"user": str(user_id)},
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{'Authorization': f'Bearer {token}'})
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try:
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tokens = await read_file(file_content, f.filename, f.content_type)
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file_upload["tokens"] = tokens
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except:
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...
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files.append(file_upload)
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except Exception as e:
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logger.error(e)
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return json.dumps(files) if files else ""
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async def get_str_token(input_str):
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# 获取tokenizer对象，目前只支持通义千问系列模型
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tokenizer = get_tokenizer('qwen-turbo')
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# 将字符串切分成token并转换为token id
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tokens = tokenizer.encode(input_str)
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return len(tokens)
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async def read_pdf(pdf_stream):
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text = ""
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with fitz.open(stream=pdf_stream, filetype="pdf") as pdf_document:
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for page in pdf_document:
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text += page.get_text()
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return text
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async def read_word(word_stream):
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# 使用 python-docx 打开 Word 文件流
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doc = Document(io.BytesIO(word_stream))
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# 提取每个段落的文本
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text = ""
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for para in doc.paragraphs:
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text += para.text
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return text
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async def read_file(file, filename, content_type):
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text = ""
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if content_type == "application/pdf" or filename.endswith('.pdf'):
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# 提取 PDF 内容
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text = await read_pdf(file)
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elif content_type == "application/vnd.openxmlformats-officedocument.wordprocessingml.document" or filename.endswith(
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'.docx'):
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text = await read_word(file)
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return await get_str_token(text)
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