404 for path served by Cherrypy

问题

For three simple apps: let us use a different port than 8080:

cherrypy.config.update({'server.socket_host': '127.0.0.1',
                    'server.socket_port': 28130
                   })

Let us set up three apps:

fusionConf = { '/fusion':{}} mobileConf = { r"/mobile_to_fusion":{}} adminConf = { '/admin':{}}

cherrypy.tree.mount(fusionListener, r"/fusion",fusionConf) cherrypy.tree.mount(mobileListener, r"/mobile_to_fusion",mobileConf) cherrypy.tree.mount(adminListener, r"/admin",adminConf) #

cherrypy.engine.start() cherrypy.engine.block()

We can see it running on the correct port:

$netstat -an | grep 28130
tcp4       0      0  127.0.0.1.28130        *.*                    LISTEN

The application logging agrees:

CherryPy Checker:
The application mounted at '/fusion' has config entries that start with its script name: '/fusion'

CherryPy Checker:
The application mounted at '/mobile_to_fusion' has config entries that start with its script name: '/mobile_to_fusion'

CherryPy Checker:
The application mounted at '/admin' has config entries that start with its script name: '/admin'

But when accessing the url: http://localhost:28130/admin - It is not found?

404 Not Found
The path '/admin' was not found.

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/cherrypy/_cprequest.py", line 638, in respond
    self._do_respond(path_info)
  File "/usr/local/lib/python3.8/site-packages/cherrypy/_cprequest.py", line 697, in _do_respond
    response.body = self.handler()
  File "/usr/local/lib/python3.8/site-packages/cherrypy/lib/encoding.py", line 219, in __call__
    self.body = self.oldhandler(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/cherrypy/_cperror.py", line 416, in __call__
    raise self
cherrypy._cperror.NotFound: (404, "The path '/admin' was not found.")
Powered by CherryPy 18.5.0

Why is Cherrypy not finding the paths?

回答1:

The AdminListener class is mounted under /admin and AdminListener does not have a default or index method to be able to mount an instance of AdminListener under /admin and expect it to work. For instance, with your current implementation/admin/admin should work.

You can either:

Define def default(self) or def index(self) in AdminListener (replace the admin method) or
Mount an instance of AdminListener under ''. Like cherrypy.tree.mount(adminListener, "",adminConf), this will have the side effect of having the adminConf apply to all the sub-application, so I suppose the right approach would be option 1.

For example, for option 1:

  class AdminListener(object):
      @cherrypy.expose
      def index(self, param=None):
          return "Hello from Admin"

alternatively

  class AdminListener(object):
      @cherrypy.expose
      def default(self, param=None):
          return "Hello from Admin"

The main difference is that the index method does not consume url fragments like positional parameters, for example /admin/one would not work, but /admin/?param=one will work with index and default (notice the second /, is important).

The default method is like a catch-all alternative, it will be called for any undefined path under the mountpoint of the app.

来源：https://stackoverflow.com/questions/60841848/404-for-path-served-by-cherrypy

标签

python

cherrypy