rag-gateway/app/service/difyService.py

import json
from datetime import datetime

import httpx
from typing import Union, Dict, List
from fastapi import HTTPException
from starlette import status
from watchdog.observers.fsevents2 import message

# from Log import logger
from app.config.config import settings
from app.utils.rsa_crypto import RagflowCrypto


class DifyService:
    def __init__(self, base_url: str):
        self.base_url = base_url

    def _handle_response(self, response: httpx.Response) -> Union[Dict, List]:
        if response.status_code != 200:
            return {}

        data = response.json()
        ret_code = data.get("retcode")
        if ret_code == 401:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail="登录过期",
            )
        if ret_code != 0:
            return {}

        # 检查返回的数据类型
        if isinstance(data.get("data"), dict):
            return data.get("data", {})
        elif isinstance(data.get("data"), list):
            return data.get("data", [])
        else:
            return {}

    async def register(self, username: str, password: str):
        password = RagflowCrypto(settings.PUBLIC_KEY, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/v1/user/register",
                headers={'Content-Type': 'application/json'},
                json={"nickname": username, "email":  f"{username}@example.com", "password": password}
            )
            if response.status_code != 200:
                raise Exception(f"Ragflow registration failed: {response.text}")
            return self._handle_response(response)

    async def login(self, username: str, password: str) -> str:
        password = RagflowCrypto(settings.PUBLIC_KEY, settings.PRIVATE_KEY).encrypt(password)
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/v1/user/login",
                headers={'Content-Type': 'application/json'},
                json={"email": f"{username}@example.com", "password": password}
            )
            if response.status_code != 200:
                raise Exception(f"Ragflow login failed: {response.text}")
            authorization = response.headers.get('Authorization')
            if not authorization:
                raise Exception("Authorization header not found in response")
            return authorization

    async def chat(self, token: str, chat_id: str,  message: str, upload_file_id: str, conversation_id: str):

        target_url = f"{self.base_url}/v1/chat-messages"
        files = [
                {
                    "type": "image",
                    "transfer_method": "remote_url",
                    "url": "https://cloud.dify.ai/logo/logo-site.png",
                    "upload_file_id":""
                }
            ]
        if upload_file_id:
            files[0]["transfer_method"] = "local_file"
            files[0]["upload_file_id"] = upload_file_id
        data = {
            "inputs": {},
            "query": message,
            "response_mode": "streaming",
            "conversation_id": conversation_id,
            "user": chat_id,
            "files": files
        }

        async with httpx.AsyncClient(timeout=300.0) as client:
            headers = {
                'Content-Type': 'application/json',
                'Authorization': f'Bearer {token}'
            }
            async with client.stream("POST", target_url, data=json.dumps(data), headers=headers) as response:
                if response.status_code == 200:
                    try:
                        async for answer in response.aiter_text():
                            print(f"response of ragflow chat: {answer}")
                            yield answer
                    except GeneratorExit as e:
                        print(e)
                        return
                else:
                    yield f"Error: {response.status_code}"



    async def get_session_history(self, token: str, chat_id: str, is_all: int=0):
        url = f"{self.base_url}/v1/conversation/get?conversation_id={chat_id}"
        headers = {"Authorization": token}
        async with httpx.AsyncClient() as client:
            response = await client.get(url, headers=headers)
            data = self._handle_response(response)
            # print("----------------data----------------------:", data)
            if is_all:
                return data
            return data.get("message", [])

    async def upload(self, token: str, filename: str, file: bytes) -> dict:
        url = f"{self.base_url}/console/api/files/upload"
        headers = {
            'Content-Type': 'application/json',
            'Authorization': f'Bearer {token}'
        }

        # 创建表单数据，包含文件
        files = {"file": (filename, file)}
        async with httpx.AsyncClient() as client:
            response = await client.post(url, headers=headers, files=files)
            data = self._handle_response(response)
            # file_path = data.get("file_path", "")
            result = {
                "file_path": data
            }

            return result




if __name__ == "__main__":
    async def a():
        a = DifyService("http://192.168.20.119:11080")
        b = await a.get_knowledge_list("ImY3ZTZlZWQwYTY2NTExZWY5ZmFiMDI0MmFjMTMwMDA2Ig.Zzxwmw.uI_HAWzOkipQuga1aeQtoeIc3IM", 1,
                                 10)
        print(b)

    import asyncio

    asyncio.run(a())