[FIXED] Terminating a subprocess in python flask

Issue

I have a flask application in which I have to run a bash script. On visiting a particular link (let say localhost:5000/B) I execute the script using python's subprocess library. Then used wait() function on subprocess. So that the script is finished before doing other tasks which depend on script. After finishing those remaining tasks I return the results in response by rendering a template.

Sometimes I might go back from page or press cancel button( on top side of browser). In that case I want to terminate that script from running even if it has not completed. I have added javascript in page so that when I go back from page it makes a GET request to server at link localhost:5000/C. In the function handling this, I terminate the subprocess.

But due to some reasons it does not work, even after using kill() or terminate() method.

Can we terminate a subprocess on which we have used wait() or not? If there is a better way of doing this thing kindly let me know.

Thanks

Solution

The subprocess was creating another subprocess during the execution and it was creating problems.

Answered By - Humayun Afzal