def main(request, appid, signed):
fb_app = FBApp.objects.get(appid=appid)
try:
signature = oauth.handle_incoming(request, fb_app)
except oauth.AccessDenied:
signature = oauth.AccessSignature()
if not signature.is_valid():
# OAuth circumvented or denied
# Record auth fail and redirect to error URL:
# TODO: event
namespace = request.resolver_match.namespace or 'gimmick'
path = reverse(namespace + ':engage-intro') + "#denied"
if oauth.EMBEDDED_NS_PATTERN.search(namespace):
url = oauth.get_embedded_path(fb_app, path)
return render(request, 'chapo/redirect.html', {'url': url})
else:
return redirect(path)
session_key = 'engage_task_{}'.format(signature.code)
try:
task_id = request.session[session_key]
except KeyError:
oauth_token_job = store_oauth_token.s(
signature.code,
signature.redirect_uri,
api=API_VERSION,
app_id=appid,
)
scoring_job = celery.group(tasks.score_posts.s(),
tasks.score_likes.s(),
tasks.read_network.s())
if signed and 'oauth_token' in signed and 'user_id' in signed:
oauth_token_job.apply_async()
token = ShortToken(
fbid=int(signed['user_id']),
appid=appid,
token=signed['oauth_token'],
api=API_VERSION,
)
chain_start = scoring_job.clone((token,))
else:
chain_start = oauth_token_job | scoring_job
# celery won't give us a collected group ID, so post-process in a chord callback
chain = chain_start | tasks.compute_rankings.s()
task = chain.apply_async()
task_id = request.session[session_key] = task.id
return render(request, 'gimmick/engage.html', {
'fb_app': fb_app,
'task_id': task_id,
})
def fb_object(request, appid, rank):
fb_app = FBApp.objects.get(appid=appid)
namespace = request.resolver_match.namespace or 'gimmick'
path = reverse(namespace + ':engage-intro')
if oauth.EMBEDDED_NS_PATTERN.search(namespace):
redirect_url = oauth.get_embedded_path(fb_app, path)
else:
redirect_url = 'https://{}{}'.format(request.get_host(), path)
return render(request, 'gimmick/fb_object.html', {
'fb_app': fb_app,
'rank': rank,
'fb_object_url': request.build_absolute_uri(),
'fb_img_url': request.build_absolute_uri(settings.STATIC_URL + 'img/blue-logo.png'),
'fb_obj_type': 'ranking',
'redirect_url': redirect_url,
})
def intro(request, appid, signed):
fb_app = FBApp.objects.get(appid=appid)
namespace = request.resolver_match.namespace
if namespace and oauth.EMBEDDED_NS_PATTERN.search(namespace):
# Request received from Facebook canvas --
# main app should be served from canvas as well.
# Remove the true path base from FB vanity URL path:
true_path = reverse('gimmick-canvas:engage')
redirect_uri = oauth.get_embedded_path(fb_app, true_path)
else:
# Unembedded.
redirect_path = reverse('gimmick:engage')
redirect_uri = request.build_absolute_uri(redirect_path)
return render(request, 'gimmick/intro.html', {
# TODO: initial redirector?
'initial_url': fb_oauth_url(fb_app, redirect_uri),
})
