
## 基础框架

```
import logging
import os
import uvicorn
from fastapi import FastAPI
from starlette.middleware.cors import CORSMiddleware

env = os.environ
# app = FastAPI(docs_url=None, redoc_url=None)  # 用于禁用swagger文档
app = FastAPI()

# 日志配置
logger = logging.getLogger()
logger.setLevel(logging.INFO)
formatter = logging.Formatter(
    "%(asctime)s - %(module)s - %(funcName)s - line:%(lineno)d - %(levelname)s - %(message)s"
)
# 输出到控制台
to_console = logging.StreamHandler()
to_console.setFormatter(formatter)
logger.addHandler(to_console)

# 输出到文件中
to_file = logging.FileHandler(filename="log.txt")
to_file.setFormatter(formatter)
logger.addHandler(to_file)

# 配置CORS
origins = [
    "*"
]
app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# def

if __name__ == '__main__':
    # 启动服务
    host = env.get("HOST") if env.get("HOST") is not None else "0.0.0.0"
    port = int(env.get("PORT")) if env.get("PORT") is not None else 8000
    uvicorn.run(app='api_service:app', host=host, port=port, reload=True)
```

## Json请求

```
class ChatPdfRequest(BaseModel):
    conversation_id: str
    query: str
    history: List[Tuple[str, str]]


@app.post("/ChatPdf", tags=["Chat"], summary="与llm模型对话")
async def chatpdf(
        ChatPdfRequest: ChatPdfRequest = Body(..., content_type="application/json", description="对话信息")):
```

## 日志写入

```
# 日志记录器
logger = logging.getLogger()
 
# 设置日志级别，只有大于等于这个级别的日志才能输出
logger.setLevel(logging.ERROR) # 有DEBUG INFO WARRING ERROR CRITICAL
 
# 设置日志格式
formatter = logging.Formatter(
    "%(asctime)s - %(module)s - %(funcName)s - line:%(lineno)d - %(levelname)s - %(message)s"
)
 
# 输出到控制台
to_console = logging.StreamHandler()
to_console.setFormatter(formatter)
logger.addHandler(to_console)
 
# 输出到文件中
to_file = logging.FileHandler(filename="log.txt")
to_file.setFormatter(formatter)
logger.addHandler(to_file)
```

## 更好的日志写入

```
def getLogger(name, file_name, use_formatter=True):
    logger = logging.getLogger(name)
    logger.setLevel(logging.INFO)
    console_handler = logging.StreamHandler(sys.stdout)
    formatter = logging.Formatter('%(asctime)s    %(message)s')
    console_handler.setFormatter(formatter)
    console_handler.setLevel(logging.INFO)
    logger.addHandler(console_handler)
    if file_name:
        handler = logging.FileHandler(file_name, encoding='utf8')
        handler.setLevel(logging.INFO)
        if use_formatter:
            formatter = logging.Formatter('%(asctime)s - %(name)s - %(message)s')
            handler.setFormatter(formatter)
        logger.addHandler(handler)
    return logger

logger = getLogger('ChatGLM', 'chatlog.log')
```


FastAPi操作