Source Code for Module wsgiwapi.jsonsupport

 1  # Copyright (c) 2009 Richard Boulton 
 2  # 
 3  # Permission is hereby granted, free of charge, to any person obtaining a copy 
 4  # of this software and associated documentation files (the "Software"), to deal 
 5  # in the Software without restriction, including without limitation the rights 
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 7  # copies of the Software, and to permit persons to whom the Software is 
 8  # furnished to do so, subject to the following conditions: 
 9  # 
10  # The above copyright notice and this permission notice shall be included in 
11  # all copies or substantial portions of the Software. 
12  # 
13  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
14  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
15  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
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18  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
19  # SOFTWARE. 
20  r"""Support for converting responses to JSON formats. 
21   
22  """ 
23  __docformat__ = "restructuredtext en" 
24   
25  have_json = False 
26  try: 
27      # json is a built-in module from python 2.6 onwards 
28      import json 
29      if hasattr(json, 'dumps'): 
30          have_json = True 
31      else: 
32          del json 
33  except ImportError: 
34      pass 
35  if not have_json: 
36      import simplejson as json 
37   
38  from application import JsonResponse 
39  from wsgisupport import Response 
40   
41 -def convert_to_json(request, response, props, 
42                      content_type="application/json"): 
43      """Convert a response to JSON. 
44   
45      The supplied content type will be overridden by any type set in the 
46      response object. 
47   
48      """ 
49      jsonobj = response 
50      status = 200 
51   
52      if isinstance(response, JsonResponse): 
53          jsonobj = response.jsonobj 
54          if response.status_code is not None: 
55              status = response.status_code 
56          if response.content_type is not None: 
57              content_type = response.content_type 
58   
59      return Response(json.dumps(jsonobj), status, content_type) 
60   
61 -def convert_to_jsonp(request, response, props): 
62      """Convert a response to JSONP, according to the props. 
63   
64      """ 
65      # FIXME - do something about the character set. 
66      # First comment on http://simonwillison.net/2009/Feb/6/json/ implies that 
67      # it needs to be ascii to work correctly with IE. 
68      response = convert_to_json(request, response, props, 
69                                 content_type='text/javacsript') 
70   
71      paramname = props['return_JSONP_paramname'] 
72      jsonp = request.validated.get(paramname) 
73      if jsonp != '': 
74          response.body = jsonp + '(' + response.body + ')' 
75      return response 
76   
77 -def parse_json_body(request): 
78      """Parse json in a request body. 
79   
80      """ 
81      request.json = json.loads(request.raw_post_data) 
82   
83  # vim: set fileencoding=utf-8 : 
84