def add_poll():
"""Called by the progress page using AJAX to check whether the task is complete."""
task_id = request.args.get('tid')
try:
task = add.get_task(task_id)
except ConnectionError:
# Return the error message as an HTTP 500 error
return 'Coult not connect to the task queue. Check to make sure that <strong>redis-server</strong> is running and try again.', 500
ready = task.return_value is not None if task else None
return jsonify(ready=ready)
def add_results():
"""When poll_task indicates the task is done, the progress page redirects here using JavaScript."""
task_id = request.args.get('tid')
task = add.get_task(task_id)
if not task:
return redirect('/')
result = task.return_value
if not result:
return redirect('/progress?tid=' + task_id)
task.delete()
# Redis can also be used to cache results
return render_template('results.html', value=result)
