I'm trying to implement a Tastypie Resource that allows GET & POST operations following a per user-permission policy, the model is pretty simple (similar to the Note model in Tastypie documentation) and the resource itself is also pretty simple, I just have an extra override_urls method to implement search with Haystack.
My main problem now is that although running the project locally seems to be working fine, requests are fast and everything. Once I deployed the project (On Linode, using Nginx, Gunicorn, Runit), I discovered that POST requests are too slow, taking about a 1.1 min to come back with a 201 status. GET requests on the other hand are working well and as expected.
I ran a Python Hotshot profiler on the request and it's showing that the entire POST request is taking 0.127 CPU seconds. I'm not really sure what's happening here.
I should mention that I'm using ApiKeyAuthentication and DjangoAuthorization for my Tastypie resource.
Here's a screenshot from Chrome Inspector for the request: http://d.pr/i/CvCS
It would be great if anyone can direct me into the correct direction to look for an answer for this problem.
Thanks!
Edit:
Some code:
Models & Resource:
class Note(models.Model):
timestamp = models.DateTimeField('Timestamp')
user = models.ForeignKey(User)
page_title = models.CharField("Page Title", max_length=200)
url = models.URLField('URL', verify_exists=False)
summary = models.TextField("Summary")
notes = models.TextField("Notes", null=True, blank=True)
def __unicode__(self):
return self.page_title
def get_absolute_url(self):
return self.url
class NoteResource(ModelResource):
user = fields.ForeignKey(UserResource, 'user')
class Meta:
queryset = Note.objects.all()
resource_name = 'note'
list_allowed_methods = ['get', 'post']
detail_allowed_methods = ['get']
always_return_data = True
authentication = ApiKeyAuthentication()
authorization = DjangoAuthorization()
# authentication = Authentication() #allows all access
# authorization = Authorization() #allows all access
ordering = [
'-timestamp'
]
def override_urls(self):
return [
url(r"^(?P<resource_name>%s)/search%s$" % (
self._meta.resource_name, trailing_slash()),
self.wrap_view('get_search'), name="api_get_search"),
]
def obj_create(self, bundle, request=None, **kwargs):
return super(NoteResource, self).obj_create(bundle,
request,
user=request.user)
def apply_authorization_limits(self, request, object_list):
return object_list.filter(user=request.user)
def get_search(self, request, **kwargs):
self.method_check(request, allowed=['get'])
self.is_authenticated(request)
sqs = SearchQuerySet().models(Note).filter(
user=request.user
).auto_query(
request.GET.get('q', '')
)
paginator = Paginator(sqs, 100)
try:
page = paginator.page(int(request.GET.get('page', 1)))
except InvalidPage:
raise Http404("Sorry, no results on that page.")
objects = []
for result in page.object_list:
bundle = self.build_bundle(obj=result.object, request=request)
bundle.data['score'] = result.score
bundle = self.full_dehydrate(bundle)
objects.append(bundle)
object_list = {
'objects': objects,
}
self.log_throttled_access(request)
return self.create_response(request, object_list)
Gunicorn Conf:
bind = "0.0.0.0:1330"
workers = 1
Nginx Conf (included in the main nginx.conf):
server {
listen 80;
server_name domain.com example.com;
access_log /path/to/home/then/project/access.log;
error_log /path/to/home/then/project/error.log;
location / {
proxy_pass http://127.0.0.1:1330;
}
location /static/ {
autoindex on;
root /path/to/home/then/project/;
}
}