Hi, I am relatively new to working with django and web services. I am using django-piston and I posted this on that group as well but got no reply yet. Posting it here since its more active community and my problem is not related to Django-piston in particular but rather Django and web services in general. Hoping to get a reply from here:)
I am trying to implement a small example of a RESTful web service i.e a hotel booking service. I have implemented my resources successfully with read, update and delete methods according to my specifications. I can invoke them successfully using 'curl' and get the desired status codes. The problem now I am stuck in implementing full behavior of my service that invokes a particular resource after performing a certain method on a resource. For example, after invoking successfully a POST method on 'booking' resource, I want to invoke a POST on 'payment' resource. My main problem is : - where do I implement all the specifications for my RESTful web service that invokes methods on these resources in a specific sequence as desired. Is it in the 'view.py' file that I create in the 'api' folder? Can someone give me any example on how to write web service clients in django / django-piston? I googled but found no good result. - Secondly, my main problem is how do I invoke these methods with in my code? I have tried urllib/ urllib2. When I invoke a remote address like 'http://www.example.com', it returns the html file but when I invoke local host, i.e. http://127.0.0.1:8000/api/hb/bookings/21/ , curl does not respond when I invoke that handler from curl on command prompt. My code is like this: class RoomHandler(BaseHandler): allowed_methods = ('GET', 'PUT', 'POST', 'DELETE') model = room fields = ('rType', 'floor') def read(self, request, id=0): ..... if b: b = booking.objects.get(id=id) response = room.objects.filter(id = b.room_id) req = urllib2.Request('http://127.0.0.1:8000/api/hb/ bookings/21/') # req = urllib2.Request('http://www.example.com') response = urllib2.urlopen(req) the_page = response.read() type(the_page) return the_page >From command prompt, I invoke. curl >http://127.0.0.1:8000/api/hb/bookings/21/rooms/ It does not respond anything, even if left for long time. However if I use remote url, i.e. : req = urllib2.Request('http://www.example.com') , it returns the html file. Where am I going wrong? Thirdly, how do I implement conditions in my client to invoke a certain method of a resource, i.e. before invoking POST on a 'payment' resource, I want to perform a GET on 'booking' and 'room' resource, only if I get response code of 200 (i.e. booking and room resource is created), I should be able to invoke POST on 'payment' resource else it should set a flag to false. I will be implementing an algorithm, but I was thinking can we put conditions on invoking methods of resource like we would do with JML for java interfaces? I have been stuck with these problems for almost two weeks, googling and trying different things but I am still stuck. Hoping to hear something from here. Thankyou for your time and looking forward, Irum -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
