dev server not loading localhost urls

[adelevie]

I am making an api. Part of the api involved serializing data which
will then be deserialized on another machine. Since I am using the dev
server, I wrote a view that referenced the api, ie:

def someview(request):
data = urllib2.urlopen("http://localhost:8080/some_method/?
param=foo")
output = []
for obj in serializers.deserialize("xml", response):
output.append(obj)
return HttpResponse("%s" % output[0].some_model_attr)

When I go to localhost:8080/someview, the page loads indefinitely with
no data brought to the screen. (and my urlconf is correct ;) )

[Karen Tracey]

From the development server running on port 8080, while handling a request, you are trying to get the results of another request from the same development server?  Yes, this will hang.  The development server is single-threaded.  So, if you send off a 2nd request while processing a request, the single thread of the dev server blocks waiting for the response to the 2nd request.  Meanwhile the 2nd request is queued up waiting for processing of the 1st request to complete....

See this long recent thread for reasons why and pointers to a patch and alternative tools you can use for this sort of requirement:

http://groups.google.com/group/django-users/browse_thread/thread/9ae915f9bc3bbfa3/20dffe7a395aa404

Karen

[adelevie]

Thank you for explaining that the ports were the issue. My little
workaround is to simply run two dev servers:
from command line: python manage.py runserver 8080
then open another command line window: python manage.py runserver 8000

So in my views, the url I access is on port 8080. So when I access my
api through a browser, I use localhost:8000.

On Feb 3, 6:15 pm, Karen Tracey <kmtra...@gmail.com> wrote:

> On Tue, Feb 3, 2009 at 5:54 PM, adelevie <adele...@gmail.com> wrote:
>
> > I am making an api. Part of the api involved serializing data which
> > will then be deserialized on another machine. Since I am using the dev
> > server, I wrote a view that referenced the api, ie:
>
> > def someview(request):
> >     data = urllib2.urlopen("http://localhost:8080/some_method/?

> > param=foo <http://localhost:8080/some_method/?%0Aparam=foo>")

> >     output = []
> >     for obj in serializers.deserialize("xml", response):
> >          output.append(obj)
> >     return HttpResponse("%s" % output[0].some_model_attr)
>
> > When I go to localhost:8080/someview, the page loads indefinitely with
> > no data brought to the screen. (and my urlconf is correct ;) )
>
> From the development server running on port 8080, while handling a request,
> you are trying to get the results of another request from the same
> development server?  Yes, this will hang.  The development server is
> single-threaded.  So, if you send off a 2nd request while processing a
> request, the single thread of the dev server blocks waiting for the response
> to the 2nd request.  Meanwhile the 2nd request is queued up waiting for
> processing of the 1st request to complete....
>
> See this long recent thread for reasons why and pointers to a patch and
> alternative tools you can use for this sort of requirement:
>

> http://groups.google.com/group/django-users/browse_thread/thread/9ae9...
>
> Karen