CherryPy不会启动

Question

我在启动CherryPy时遇到了一些困难，我不知道为什么总是会出现这个错误。这是带有日志输出的版本和相关代码。

Python2.7.6 CherryPy 3.5.0 (通过PIP)

CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
STATIC_DIR = os.path.join(CURRENT_DIR, "static")
CONFIG = {
    '/static': {
        'tools.staticdir.on': True,
        'tools.staticdir.dir': STATIC_DIR
    }
}

Daemonizer(cherrypy.engine).subscribe()                         # When we start, do it as a daemon process
cherrypy.config.update({'server.socket_host': '127.0.0.1','server.socket_port': 8080,'log.error_file': 'site.log'})       # Listen on all local IPs (default is 8080)
cherrypy.tree.mount(MyWebServer(), '/', config=CONFIG)          # Mount the app on the root
cherrypy.engine.start()

下面是日志输出：

[05/Jul/2014:10:28:01] ENGINE Bus STARTING
[05/Jul/2014:10:28:01] ENGINE Forking once.
[05/Jul/2014:10:28:01] ENGINE Forking twice.
[05/Jul/2014:10:28:01] ENGINE Daemonized to PID: 21464
[05/Jul/2014:10:28:01] ENGINE Started monitor thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Started monitor thread 'Autoreloader'.
[05/Jul/2014:10:28:01] ENGINE Started monitor thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Started monitor thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Started monitor thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Started monitor thread '_TimeoutMonitor'.
[05/Jul/2014:10:28:01] ENGINE Error in 'start' listener <bound method Server.start of <cherrypy._cpserver.Server object at 0x10cf2d190>>
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/cherrypy/process/wspbus.py", line 205, in publish
    output.append(listener(*args, **kwargs))
  File "/Library/Python/2.7/site-packages/cherrypy/_cpserver.py", line 167, in start
    self.httpserver, self.bind_addr = self.httpserver_from_self()
  File "/Library/Python/2.7/site-packages/cherrypy/_cpserver.py", line 158, in httpserver_from_self
    httpserver = _cpwsgi_server.CPWSGIServer(self)
  File "/Library/Python/2.7/site-packages/cherrypy/_cpwsgi_server.py", line 43, in __init__
    accepted_queue_timeout=self.server_adapter.accepted_queue_timeout,
TypeError: __init__() got an unexpected keyword argument 'accepted_queue_size'

[05/Jul/2014:10:28:01] ENGINE Shutting down due to error in start listener:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/cherrypy/process/wspbus.py", line 243, in start
    self.publish('start')
  File "/Library/Python/2.7/site-packages/cherrypy/process/wspbus.py", line 223, in publish
    raise exc
ChannelFailures: TypeError("__init__() got an unexpected keyword argument 'accepted_queue_size'",)

[05/Jul/2014:10:28:01] ENGINE Bus STOPPING
[05/Jul/2014:10:28:01] ENGINE HTTP Server None already shut down
[05/Jul/2014:10:28:01] ENGINE Stopped thread '_TimeoutMonitor'.
[05/Jul/2014:10:28:01] ENGINE Stopped thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Stopped thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Stopped thread 'Autoreloader'.
[05/Jul/2014:10:28:01] ENGINE Stopped thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Stopped thread 'Monitor'.
[05/Jul/2014:10:28:01] ENGINE Bus STOPPED
[05/Jul/2014:10:28:01] ENGINE Bus EXITING
[05/Jul/2014:10:28:01] ENGINE Bus EXITED

Answer 1

我猜Daemonizer的存在表明您实际上是在询问CherryPy部署的情况。

首先，cherrypy.engine.start()不足以启动CherryPy。看看cherrypy.quickstart的最小例程。我把它放在__name__ == '__main__'条件下。它允许您直接从shell执行脚本。

其次，您不应该直接在应用程序代码中处理Daemonizer插件(以及PIDFile、DropPrivileges等)。有切里，它应该处理系统的东西。

您可以通过static.py运行下面的代码(将cd放入包含的目录中)。它将在前台启动您的应用程序。cherryd -d -i static会将你的应用程序去守护。

#!/usr/bin/env python
# -*- coding: utf-8 -*-


import os

import cherrypy


path   = os.path.abspath(os.path.dirname(__file__))
config = {
  'global' : {
    'server.socket_host' : '127.0.0.1',
    'server.socket_port' : 8080,
    'server.thread_pool' : 4
  },
  '/static' : {
    'tools.staticdir.on'  : True,
    'tools.staticdir.dir' : os.path.join(path, 'static')
  }
}

class App:

  @cherrypy.expose
  def index(self):
    return 'Your dynamic stuff'


cherrypy.tree.mount(App(), '/', config)


if __name__ == '__main__':
  cherrypy.engine.signals.subscribe()
  cherrypy.engine.start()
  cherrypy.engine.block()

几年前，我编写了一个完整的CherryPy部署教程cherrypy-webapp-骨架。如果你需要一张完整的照片，请看一看。