1 from django import http
2 from django.utils import simplejson as json
3 from django.utils.functional import Promise
4 from django.template.loader import render_to_string
5 from datetime import datetime
8 class ExtendedEncoder(json.JSONEncoder):
10 def default(self, obj):
11 if isinstance(obj, Promise):
14 if isinstance(obj, datetime):
15 return datetime.ctime(obj) + " " + (datetime.tzname(obj) or 'GMT')
17 return json.JSONEncoder.default(self, obj)
20 # shortcut for JSON reponses
21 class JSONResponse(http.HttpResponse):
23 def __init__(self, data={}, **kwargs):
25 kwargs.pop('mimetype', None)
27 super(JSONResponse, self).__init__(
28 json.dumps(data, cls=ExtendedEncoder),
29 mimetype="application/json", **kwargs)
33 class JSONFormInvalid(JSONResponse):
34 def __init__(self, form):
35 super(JSONFormInvalid, self).__init__(form.errors, status=400)
38 class JSONServerError(JSONResponse):
39 def __init__(self, *args, **kwargs):
40 kwargs['status'] = 500
41 super(JSONServerError, self).__init__(*args, **kwargs)