Handle sys.exit() in cherrypy service

When you start/stop a python cherrypy service (compiled with py2exe), this works fine When I get a sys.exit() call (from my error handler), cherrypy quits, but the service remains hanging.

Code:

import cherrypy
import win32serviceutil
import win32service
import sys

SERVICE = None

class HelloWorld:
    """ Sample request handler class. """

    def __init__(self):
        self.iVal = 0

    @cherrypy.expose
    def index(self):
        self.iVal += 1 
        if self.iVal == 5:
            StopService(SERVICE)
        return "Hello world! " + str(self.iVal) 


class MyService(win32serviceutil.ServiceFramework):
    """NT Service."""

    _svc_name_ = "CherryPyService"
    _svc_display_name_ = "CherryPy Service"
    _svc_description_ = "Some description for this service"

    def SvcDoRun(self):
        SERVICE = self
        StartService()


    def SvcStop(self):
        StopService(SERVICE)


def StartService():

    cherrypy.tree.mount(HelloWorld(), '/')

    cherrypy.config.update({
        'global':{
            'tools.log_tracebacks.on': True,
            'log.error_file': '\\Error_File.txt',
            'log.screen': True,
            'engine.autoreload.on': False,
            'engine.SIGHUP': None,
            'engine.SIGTERM': None
            }
        })

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


def StopService(classObject):
    classObject.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
    cherrypy.engine.exit()
    classObject.ReportServiceStatus(win32service.SERVICE_STOPPED)



if __name__ == '__main__':
    print sys.argv
    win32serviceutil.HandleCommandLine(MyService)

Any advice would be great :)


Asked by: Vivian490 | Posted: 06-12-2021






Answer 1

I'm not entirely sure where the sys.exit call is coming from or what your preferred behavior is. When sys.exit is called, however, it raises a SystemExit exception. You can intercept this and continue on your way:

import sys
try:
    sys.exit()
except SystemExit:
    print "Somebody called sys.exit()."
print "Still running."

... or use finally to do some cleanup:

try:
    do_something()
finally:
    cleanup()

Answered by: Sophia373 | Posted: 07-01-2022



Answer 2

stopping a cherrypy server over http recommends cherrypy.engine.exit() instead of sys.exit().

Answered by: Maddie593 | Posted: 07-01-2022



Similar questions

python - Unittest causing sys.exit()

No matter what I do sys.exit() is called by unittest, even the most trivial examples. I can't tell if my install is messed up or what is going on. IDLE 1.2.2 ==== No Subprocess ==== >>> import unittest >>> >>> class Test(unittest.TestCase): def testA(self): a = 1 self.assertEqual(a,1) >>> unittest.main() option -n not recognized Usa...


linux - How to bypass the 0-255 range limit for sys.exit() in python?

In python (on a Linux system), I'm launching a command using os.system() and retrieving the return code. If that return code is different from 0, I would like to make the program exit with that same return code. So I wrote: ret = os.system(cmd) if ret != 0: print "exit with status %s" % ret sys.exit(ret) When the return code is lower than 256, it works fine, but when it'...


Python sys.exit() help?

I am working in Python and am trying to have a line of code execute and after it executes I am calling sys.exit() to have the script itself "exit." However, it seems that sys.exit() is executing before the line of code above it executes. Below is the code I am trying to implement: if something == True: self.redirect('http://www.google.com/') sys.exit() The...


mocking - How to get around "sys.exit()" in python nosetest?

It seems that python nosetest will quit when encountered sys.exit(), and mocking of this builtin doesn't work.


import - python: Importing scipy.io seems to prevent sys.exit() to work properly

Under Windows, executing the following Python script I get an ERRORLEVEL of 0 instead of the expected 2. import sys import scipy.io sys.exit(2) If I remove the import scipy.io, I got the correct ERRORLEVEL of 2... Any idea why importing scipy.io cause such an issue? PS: windows 7, python 2.72, scipy 0.10.1 Calling help(sys.exit) just before the sys.exit call return...


python - Issue with sys.exit() in pygame

I am learning to use Pygame, and when I use sys.exit(), I run into a problem. Here is the code: import pygame, sys,os from pygame.locals import * pygame.init() window = pygame.display.set_mode((468, 60)) pygame.display.set_caption('Game') screen = pygame.display.get_surface() file_name = os.path.join("data","image.bmp") surface = pygame.image.load(file_name) screen.blit(surface, (0,0)...


python - Why are the methods sys.exit(), exit(), raise SystemExit not working?

I need an alternative to kill the python script while inside a thread function. My intention is killing the server when the client enters a 0... Is this not working because the threads haven't been terminated? Here is my code: socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM); print 'Socket created' try: socket.bind((HOST, PORT)) except socket.error, message: print 'Bind statement failed. ...


How to use sys.exit() in Python

player_input = '' # This has to be initialized for the loop while player_input != 0: player_input = str(input('Roll or quit (r or q)')) if player_input == q: # This will break the loop if the player decides to quit print("Now let's see if I can beat your score of", player) break if player_input != r: print('invalid choice, try again') if player_input ==r: roll...


python - Is it possible for a unit test to assert that a method calls sys.exit()?

I have a Python 2.7 method that sometimes calls sys.exit(1) Is it possible to make a unit test that verifies this line of code is called when the right conditions are met?


python - how to continue execution after sys.exit() command

Here i'm reading and comparing values from the two logs using 'for' loop.Problem is i'm not able to continue to next TC after sys.exit command. Let me know if required more clarification f = open('/tmp/ftplog', 'r') for line in f: m = re.findall("5\d+", line) #print m fd = open('/tmp/tellog', 'r') for line in fd: n = re.findall(r"5\d+", line) #prin...






Still can't find your answer? Check out these communities...



PySlackers | Full Stack Python | NHS Python | Pythonist Cafe | Hacker Earth | Discord Python



top