Here's my minimal progress-reporting Django backend using your setup. I'm still a Django n00b and it's the first time I'm messing with Celery, so this can probably be optimized.
from time import sleep
from celery import task, current_task
from celery.result import AsyncResult
from django.http import HttpResponse, HttpResponseRedirect
from django.core.urlresolvers import reverse
from django.utils import simplejson as json
from django.conf.urls import patterns, url
@task()
def do_work():
""" Get some rest, asynchronously, and update the state all the time """
for i in range(100):
sleep(0.1)
current_task.update_state(state='PROGRESS',
meta={'current': i, 'total': 100})
def poll_state(request):
""" A view to report the progress to the user """
if 'job' in request.GET:
job_id = request.GET['job']
else:
return HttpResponse('No job id given.')
job = AsyncResult(job_id)
data = job.result or job.state
return HttpResponse(json.dumps(data), mimetype='application/json')
def init_work(request):
""" A view to start a background job and redirect to the status page """
job = do_work.delay()
return HttpResponseRedirect(reverse('poll_state') + '?job=' + job.id)
urlpatterns = patterns('webapp.modules.asynctasks.progress_bar_demo',
url(r'^init_work$', init_work),
url(r'^poll_state$', poll_state, name="poll_state"),
)
