Python Hangs When Using Class Object

Ziycon

I'm having an issue with a Python script which is called from PHP via shell_exec() and the Python script hangs when called from PHP but the Python script is run via command line it runs and completes fine.

Global.py

import re
from selenium import webdriver

class Global:

    def getDriver(self):
        try:
            chrome_options = webdriver.ChromeOptions()
            chrome_options.add_argument('headless')
            chrome_options.add_argument('no-sandbox')

            # Windows - Dev Environment
            driver = webdriver.Chrome(executable_path='C:\chromedriver.exe', chrome_options=chrome_options)
            # Linux - Prod Environment
            #driver = webdriver.Chrome(chrome_options=chrome_options)

            return driver
        except Exception as e:
            print('Error: ' + str(e.args[0]))

    def closeDriver(self, driver):
        try:
            driver.close()
            return None
        except Exception as e:
            print('Error: ' + str(e.args[0]))

script1.py

import os, sys
ROOT_DIR = os.path.normpath(os.path.join(os.path.abspath(__file__), '../..'))
sys.path.insert(0, ROOT_DIR)
from Global import Global

globalObj = Global()

try:
    # Load all items on page
    driver = globalObj.getDriver()
    driver.get(PARAMS[1])

    #... code to create a JSON file and populate it.

    # Close webdriver
    globalObj.closeDriver(driver)

    print('Completed Ref: ' + str(PARAMS[2]))

except Exception as e:
    print('Error: ' + str(e.args[0]))

There is very detailed info here: https://stackoverflow.com/questions/48988455/Python-script-hangs-when-called-via-php-shell-exec

What I've found is that the class 'Global' I'm creating an object for and calling two functions, one to create a webdriver and pass the driver back and one that takes a driver as a parameter and closes it.

If I remove the 'Global' class references and setup a webdriver within the current script, all will work fine so there is something I'm doing wrong or incorrectly with the Global class.

Anyone ever seen or heard of anything like this?

14ned

Ziycon wrote: »

Anyone ever seen or heard of anything like this?

Bugs like these are often from environment zomping by PHP to prevent various security exploits.

Niall

Talisman

The obvious answer is that the Global class is not being found when you call the script from PHP.

Ziycon

@14ned, it was all working fine for the past 3 years up until i moved the web driver creation and closure out of the scripts and into a 'Global' class.

@Talisman, the global class is being found as the JSON file the script is generating and populating is being created correctly, it just looks like the webdriver isn't closed out properly and hangs now.

It's looking like its the chromedriver now, I changed the webdriver to Firefox and PhantomJS and all works fine, it looks like the chromedriver process is never closed in task manager once created.

Hmmm, not sure where to go now.