Source Code for Module grassyknoll.serial.JsonSerial

 1  """ 
 2  Code to convert to/from JSON and basic Python types. 
 3  """ 
 4   
 5  import simplejson 
 6  import datetime 
 7   
 8   
 9  MIMETYPES=set([ 
10      "application/json", 
11      "text/javascript", 
12      "application/x-javascript" # stdlib.mimetypes returns this for foo.js 
13  ]) 
14 -class DateTimeAwareJSONEncoder(simplejson.JSONEncoder): 
15      """ 
16      L{simplejson.JSONEncoder} subclass that knows how to encode date/time types 
17   
18      Per http://www.json.org/json.js, "official" JSON dates are 
19      U{ISO Dates<http://en.wikipedia.org/wiki/Iso_date>}. 
20      """ 
21       
22      DATE_FORMAT = "%Y-%m-%d"  
23      TIME_FORMAT = "%H:%M:%S" 
24       
25 -    def default(self, o): 
26          if isinstance(o, datetime.datetime): 
27              return o.strftime("%sT%s" % (self.DATE_FORMAT, self.TIME_FORMAT)) 
28          elif isinstance(o, datetime.date): 
29              return o.strftime(self.DATE_FORMAT) 
30          elif isinstance(o, datetime.time): 
31              return o.strftime(self.TIME_FORMAT) 
32          else: 
33              return super(DateTimeAwareJSONEncoder, self).default(o)     
34   
35 -def dumps(obj, **kwargs): 
36      return simplejson.dumps(obj, cls=DateTimeAwareJSONEncoder, **kwargs) 
37   
38  # NOTE We can't use loads' C{object_hook} to implement a corresponding loader, 
39  # since that only gets called for B{objects} (ie, dicts), not individual 
40  # values. Subclassing JSONDecoder is possible, but painful. L{Norman}s are a 
41  # much better solution. 
42  loads=simplejson.loads 
43