CherryPy日志：如何配置和使用全局和应用程序级日志记录器？

Question

我的日志记录有问题。我正在运行CherryPy 3.2，我已经阅读了文档here，但是还没有找到任何关于如何配置本地日志文件以进行输出和如何写入的示例。

覆盆子.py：

import socket
import sys
import cherrypy

app_roots = {
                # Sean's laptop dev environment.
                "mylaptop": "/home/src/local-mydomain.com/py",

                # Hosted dev environment.  
                "mydomain.com" : "/home/dev/src/py"
            }


hostname = socket.gethostname()
CherryPyLog = cherrypy.tree.mount().log

if hostname not in app_roots:
    CherryPyLog("The following hostname does not have an app_root entry in raspberry.py.  Exiting early.")
    sys.exit()

sys.stdout = sys.stderr
sys.path.append(app_roots[hostname])

import os
os.chdir(app_root)

# Setup for raspberry application logging.
import datetime
today = datetime.datetime.today()
log.access_file = "{0}/{1}.raspberry.access.log".format(app_roots[hostname],today.strftime("%Y%m%d-%H%M"))
log.error_file = "{0}/{1}.raspberry.error.log".format(app_roots[hostname],today.strftime("%Y%m%d-%H%M"))

#Testing logger
log("{0} -- Logger configured".format(today.strftime("%Y%m%d-%H%M%S")))

import atexit
cherrypy.config.update({'environment': 'embedded'})

if cherrypy.__version__.startswith('3.0') and cherrypy.engine.state == 0:
    cherrypy.engine.start(blocking = False)
    atexit.register(cherrypy.engine.stop)

from web.controllers.root import RaspberryRequestHandler

application = cherrypy.Application(RaspberryRequestHandler(), script_name = None, config = None)

更新：这是我最后使用的代码块。

app_roots = {
                # Sean's laptop dev environment.
                "mylaptop": "/home/src/local-plottools.com/py",

                # Hosted dev environment.  
                "myDomain" : "/home/dev/src/py"
            }

import socket
hostname = socket.gethostname()

import cherrypy
import sys
if hostname not in app_roots:
    cherrypy.log("The hostname {0} does not have an app_root entry in {1}.  Exiting early.".format(hostname,__file__))
    sys.exit()

sys.stdout = sys.stderr
sys.path.append(app_roots[hostname])

import os
os.chdir(app_roots[hostname])

from web.controllers.root import RaspberryRequestHandler

cherrypy.config.update({
    'log.access_file': "{0}/cherrypy-access.log".format(app_roots[hostname]),
    'log.error_file': "{0}/cherrypy.log".format(app_roots[hostname]),
    "server.thread_pool" : 10
})

# special case, handling debug sessions when quickstart is needed.
if __name__ == "__main__":

    cherrypy.config.update({
                                'log.screen': True, 
                                "server.socket_port": 8000
                            })
    cherrypy.quickstart(RaspberryRequestHandler())
    sys.exit()

# This configuration is needed for running under mod_wsgi.  See here:  http://tools.cherrypy.org/wiki/ModWSGI    
cherrypy.config.update({'environment': 'embedded'})

applicationLogName = "{0}/raspberry.log".format(app_roots[hostname])

from logging import handlers
applicationLogFileHandler = handlers.RotatingFileHandler(applicationLogName, 'a', 10000000, 1000)

import logging
applicationLogFileHandler.setLevel(logging.DEBUG)

from cherrypy import _cplogging
applicationLogFileHandler.setFormatter(_cplogging.logfmt)

cherrypy.log.error_log.addHandler(applicationLogFileHandler)

application = cherrypy.Application(RaspberryRequestHandler(), None)

Answer 1

简化一点：

import os
import socket
import sys

import cherrypy

app_roots = {
                # Sean's laptop dev environment.
                "mylaptop": "/home/src/local-mydomain.com/py",

                # Hosted dev environment.  
                "mydomain.com" : "/home/dev/src/py"
            }


hostname = socket.gethostname()
if hostname not in app_roots:
    cherrypy.log("The hostname %r does not have an app_root entry in "
                 "raspberry.py.  Exiting early." % hostname)
    sys.exit()

sys.path.append(app_roots[hostname])
os.chdir(app_root)

cherrypy.config.update({
    'environment': 'embedded',
    'log.access_file': "{0}/raspberry.access.log".format(app_roots[hostname]),
    'log.error_file': "{0}/raspberry.error.log".format(app_roots[hostname]),
    })

from web.controllers.root import RaspberryRequestHandler
application = cherrypy.tree.mount(RaspberryRequestHandler(), '/')
# Insert log changes here
cherrypy.engine.start()

如果您每天需要不同的日志，请使用如http://www.cherrypy.org/wiki/Logging#CustomHandlers所述的RotatingFileHandler，我认为您缺少的重要一点是，在实例化应用程序（例如，如上所述，通过tree.mount（））之后，应该只使用app.log，而在engine.start之前使用。也就是说，对于错误日志：

application = cherrypy.tree.mount(RaspberryRequestHandler(), '/')

log = application.log
log.error_file = ""

# Make a new RotatingFileHandler for the error log.
fname = "{0}/raspberry.error.log".format(app_roots[hostname])
h = handlers.RotatingFileHandler(fname, 'a', 10000000, 1000)
h.setLevel(DEBUG)
h.setFormatter(_cplogging.logfmt)
log.error_log.addHandler(h)

cherrypy.engine.start()

希望能帮上忙。。。