Django-Google App Engine Cron 300错误

Question

I am able to successfully run my "job" by visiting " https://keel-test.appspot.com/tasks/test/ ". I tested the header using " http://www.webconfs.com/http-header-check.php " which returns a 200 response.

I successfully pushed the following cron.yaml to Google App Engines:

cron:
- description: "test"
  url: /tasks/test
  schedule: every 8 hours

I tried running the task via the GCP Console Task queues page. However, the GCP console says that the CRON job returns a 300 error. There are zero logs except that the page returns a 301 when run by CRON and 200 if the URL above is visited manually.

Here is the app.yaml:

runtime: python
env: flex
entrypoint: gunicorn config.wsgi:application

runtime_config:
  python_version: 3

Answer 1

I had the same problem with Django

URLs (urls.py): ... url(r'^health_check/', health_check, name='health_check'), ...

My backend has the SSL Redirect enabled

SECURE_SSL_REDIRECT = True

Seeing that the app-engine crons do not follow redirects I had to disable the redirect for this one endpoint by adding the end point to the SECURE_REDIRECT_EXEMPT variable in settings.py

... SECURE_REDIRECT_EXEMPT = [r'^health_check/'] ...

Answer 2

Your cron job is hitting /tasks/test (without trailing slash). Your url handler either doesn't exist or has the trailing slash.

Try hitting https://keel-test.appspot.com/tasks/test (no slash). It redirects. Thus, the 301

Your URL handler:

url(r'^tasks/test/$', investment_views.test, name='test_job')

insists there be a trailing slash. Change that to:

url(r'^tasks/test', investment_views.test, name='test_job')

And both (with and without slash, along with anything that starts with test (eg: testing123) will get to that handler.

or, use both handlers with end-of-url signaling $ sign, if you want both to work:

url(r'^tasks/test$', investment_views.test, name='test_job')
url(r'^tasks/test/$', investment_views.test, name='test_job')

or, if you want your urls to always have the trailing slash, make sure your cron job urls obey that standard:

cron:
- description: "test"
  url: /tasks/test/
  schedule: every 8 hours