GET or POST requests outside of the browser to the LiveServerTestCase hang

[Santiago García]

We have an integration test where we start two separate Django processes and the second process makes a POST request to the first process with the requests library. This testcase broke once we upgraded to Django 1.11, while it still worked in Django 1.10.

To reproduce the issue:

• Create a simple Django app.
• Install selenium and requests
• Add a testcase like so:

import time

from django.contrib.staticfiles.testing import StaticLiveServerTestCase
from django.urls import reverse
from selenium import webdriver


class TestExample(StaticLiveServerTestCase):
    def test_example(self):
        driver = webdriver.Chrome()
        driver.get(self.live_server_url + reverse('admin:index'))
        # wait "forever"
        time.sleep(60 * 60 * 24)

I.e it just opens the admin page, then waits for 24 hours. In a Python console, type the following:

import requests
requests.get('http://localhost:47256/admin') # replace 47256 with whatever port number the LiveServerTestCase picked

and you will see that the request hangs indefinitely. Interestingly, it sometimes helps to press refresh in the Chrome window spawned by Selenium.