Python Flask 日志请求正文通过所有模块

Question

我正在尝试记录传入的 post 请求的请求正文，并将其持久化到此后在函数中调用的所有模块中。 以下是我想要实现的示例：

main_app.py

from flask import Flask
from other_file import other_module
import logging
FORMAT = '%(request_body_id)s- %(message)s'
logging.basicConfig(format=FORMAT)
log = logging.getLogger('test_logger')
@app.route('/', methods=['POST'])
def test_function():
log = logging.LoggerAdapter(log, {'request_body_id': request.body['id']})
log.info("My message")
other_module()
return "foo"

other_file.py

log = logging.getLogger('test_logger')
def other_module():
log.info("My second message")

我正在寻找的是：

>>> INFO 123456- My message
>>> INFO 123456- My second message

我得到的是：

>>> INFO 123456- My message
>>> INFO - My second message

更新： 将请求正文作为参数传递给other_module不是一种选择，因为在实际情况下需要输出请求源的大量模块被调用。

Answer 1

您可以使用日志记录将任何其他数据添加到日志中。格式化程序。举个例子：

log.py

import logging
from flask import request

class __RequestFormatter(logging.Formatter):
def format(self, record):
# you can set here everything what you need
# I just added url and id from GET parameter
record.id = request.args.get('id')
record.url = request.url
return super().format(record)
# format of our log record.
# print url and id of record which was set in format()
__stream_handler = logging.StreamHandler()
__stream_handler.setFormatter(__RequestFormatter(
'[%(asctime)s %(levelname)s] requested: %(url)s, id: %(id)s in %(module)s: %(message)s'
))
logger = logging.getLogger('my_loger')
logger.setLevel(logging.INFO)
logger.addHandler(__stream_handler)

app.py

from flask import Flask
from log import logger
from other_file import other_module
app = Flask(__name__)

@app.route('/test')
def test():
logger.info('/test was called')
other_module()
return 'hi'

other_file.py

from log import logger

def other_module():
logger.info("My second message")

现在我们调用/test?id=example_id、/test?id=example_id2并检查日志：

[2018-09-28 17:40:48,669 INFO] requested: http://127.0.0.1:5000/test?id=example_id, id: example_id in app: /test was called
[2018-09-28 17:40:48,670 INFO] requested: http://127.0.0.1:5000/test?id=example_id, id: example_id in other_file: My second message
[2018-09-28 17:40:51,475 INFO] requested: http://127.0.0.1:5000/test?id=example_id2, id: example_id2 in app: /test was called
[2018-09-28 17:40:51,476 INFO] requested: http://127.0.0.1:5000/test?id=example_id2, id: example_id2 in other_file: My second message

如您所见，所有消息都包含请求id。因此，您可以使用Formatter自定义所需的所有内容。您也可以尝试使用烧瓶-日志-请求-ID。

希望这有帮助。