neo4j暴露公网ip接口——给大模型联通知识图谱

特别鸣谢

我的领导，我的脑子，我的学习能力，感动了

1. 搭建知识图谱数据库（见上一章博客）

这里不加赘述了，请参考上一篇博客搭建

2. FastApi包装接口

这里注意：NEO4J_URI不得写http:,只能写neo4j或者bolt
还需要注意APP_HOST不得是127.0.0.1，必须是0.0.0.0，不然只有局域网才能访问！

这是.env文件：

# app
APP_HOST=0.0.0.0
APP_PORT=8000# neo4j
NEO4J_URI=neo4j://xxxxxx:7687
NEO4J_USER=neo4j
NEO4J_PASSWORD=你自己的密码
NEO4J_VERSION=5
NEO4J_DATABASE=数据库的名字
NEO4J_PORT=7474# http://127.0.0.1:8000/api/node/search?name=布洛芬
# http://120.26.32.188:8000/api/node/search?name=布洛芬

这是router的查询相关内容：

#!/usr/bin/python3import logging
from fastapi import APIRouter, status
from fastapi.responses import JSONResponse
from utils.neo4j_provider import asyncDriver
from settings import settingsrouter = APIRouter()# 定义一个根路由
@router.get("/add")
def add_node():# TODO 往 neo4j 里创建新的节点data = {'code': 0,'message': '','data': 'add success'}return JSONResponse(content=data, status_code=status.HTTP_200_OK)@router.route("/search")
async def get_search(q: str = None):if q is None:return []cql = """MATCH (p:商品名称) WHERE p.name CONTAINS $name RETURN p"""records, _, _ = await asyncDriver.execute_query(cql,name=q.query_params['name'],database_=settings.NEO4J_DATABASE,routing_="r",)# 转换节点为可序列化的字典serialized_records = []for record in records:node = record["p"]serialized_records.append({"id": node.element_id,"labels": list(node.labels),"properties": dict(node)})return JSONResponse(content=serialized_records, status_code=status.HTTP_200_OK)

这是main.py函数

import logging
from settings import settingsfrom app_init import create_applicationimport colorama# 初始化 colorama 模块 在控制台、命令行输出彩色文字的模块,可以跨平台使用
colorama.init(autoreset=True)app = create_application()
# app = FastAPI()if __name__ == "__main__":import uvicornlogging.root.setLevel(logging.DEBUG)logging.info("Starting on  %s:%d ", settings.APP_HOST, settings.APP_PORT)# main:app main下面的 app，相当于注入# main: main.py 文件(也可理解为Python模块).# app: main.py 中 app = FastAPI()# 语句创建的app对象.# --reload: 在代码改变后重启服务器，只能在开发的时候使用uvicorn.run("main:app", host=settings.APP_HOST, port=settings.APP_PORT)

neo4j_provider.py

#!/usr/bin/python3
import osfrom neo4j import GraphDatabase, AsyncGraphDatabase, basic_auth, Driver, AsyncDriver
from settings import settings# Neo4j 数据库操作类
class Neo4jProvider:"""创建 Neo4j 数据库连接"""def __init__(self) -> None:# 获取环境变量值，如果没有就返回默认值self.url = settings.NEO4J_URIself.username = settings.NEO4J_USERself.password = settings.NEO4J_PASSWORDself.neo4j_version = settings.NEO4J_VERSIONself.database = settings.NEO4J_DATABASEself.port = int(settings.NEO4J_PORT)# 同步驱动def driver(self) -> Driver:print("self.url", self.url)return GraphDatabase.driver(self.url, auth=basic_auth(self.username, self.password))# 异步驱动def async_driver(self) -> AsyncDriver:return AsyncGraphDatabase.driver(self.url, auth=basic_auth(self.username, self.password))
# 同步驱动。暴露给外面调用
driver = Neo4jProvider().driver()
# 异步驱动。暴露给外面调用
asyncDriver = Neo4jProvider().async_driver()