[英]Middleware in FastAPI for generating UUID for every request and send to logs
我正在尋找Fast API 中的中間件,用於為每個請求生成UUID並將其發送到日志。
# To see the logs, run this in python interpreter
# import with_logger
# with_logger.main()
import uuid
from logging import getLogger
import logging.config
from yaml import load, FullLoader
from fastapi import FastAPI
import uvicorn
app = FastAPI()
# @app.middleware("http")
@app.get("/")
def gen_uuid():
# For every get request generate uuid
global uuid_var
uuid_var = uuid.uuid4()
return uuid_var
log_dict = {
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'standard': {
'format': '%(uuid_var)s %(asctime)s %(levelname)-8s %(name)-15s %(message)s -Thread id: %(thread)d Thread name: %(threadName)s'
},
},
'handlers': {
'default': {
'level': 'INFO',
'formatter': 'standard',
'class': 'logging.StreamHandler',
},
'file_handler': {
'level': 'INFO',
'filename': 'mylogfile.log',
'class': 'logging.FileHandler',
'formatter': 'standard'
}
},
'loggers': {
'': {
'handlers': ['file_handler'],
'level': 'INFO',
'propagate': True
},
}
}
class ContextFilter(logging.Filter):
def filter(self, record):
record.uuid_var = gen_uuid()
return True
def main():
logging.config.dictConfig(log_dict)
handler = logging.StreamHandler()
handler.formatter = logging.Formatter(
"%(uuid_var)s %(asctime)s %(levelname)-8s %(name)-15s %(message)s -Thread id: %(thread)d Thread name: %(threadName)s")
handler.addFilter(ContextFilter())
logger = getLogger(__name__)
logger.addHandler(handler)
logger.warning(" This is a warning message")
uvicorn.run(app, host="127.0.0.1", port=8080)
我需要將 uuid 發送到 X-Request-ID 標頭,我將使用 python 日志庫從那里獲取它,例如,
@app.middleware("http")
async def get_x_request_id_header(*, x_request_id: str = Header(None)):
# return x-request-id header
return {"X-Request-ID": x_request_id}
我需要一個中間件中的所有這些。 Fast API 中是否已經存在類似這樣的中間件?
我需要在中間件中生成 uuid,例如,
@app.middleware("http")
def gen_uuid():
# For every get request generate uuid
global uuid_var
uuid_var = uuid.uuid4()
return uuid_var
但無法做到這一點。 我收到錯誤,如 gen_uuid 接受 2 個參數但傳遞 0 個參數
中間件需要兩個參數:request:Request,call_next request是api請求,call_next是處理請求的實際調用,像這樣:
@app.middleware("http")
async def init_requestvars(request: fastapi.Request, call_next):
# Customize that SimpleNamespace with hatever you need
initial_g = types.SimpleNamespace()
requestvars.request_global.set(initial_g)
response = await call_next(request)
return response
我剛剛為此實現了一個中間件。 希望它可能仍然對您有用(或將來遇到此問題的任何其他人)。
這是回購協議: https : //github.com/snok/asgi-correlation-id
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