Source Code for Module web2py.gluon.serializers

 1  """ 
 2  This file is part of the web2py Web Framework 
 3  Copyrighted by Massimo Di Pierro <mdipierro@cs.depaul.edu> 
 4  License: LGPLv3 (http://www.gnu.org/licenses/lgpl.html) 
 5  """ 
 6  import datetime 
 7  from storage import Storage 
 8  from html import TAG 
 9  from html import xmlescape 
10  from languages import lazyT 
11  import contrib.rss2 as rss2 
12   
13  try: 
14      import json as json_parser                      # try stdlib (Python 2.6) 
15  except ImportError: 
16      try: 
17          import simplejson as json_parser            # try external module 
18      except: 
19          import contrib.simplejson as json_parser    # fallback to pure-Python module 
20   
21 -def custom_json(o): 
22      if hasattr(o,'custom_json') and callable(o.custom_json): 
23          return o.custom_json() 
24      if isinstance(o, (datetime.date, 
25                        datetime.datetime, 
26                        datetime.time)): 
27          return o.isoformat()[:19].replace('T',' ') 
28      elif isinstance(o, (int, long)): 
29          return int(o) 
30      elif isinstance(o, lazyT): 
31          return str(o) 
32      elif hasattr(o,'as_list') and callable(o.as_list): 
33          return o.as_list() 
34      elif hasattr(o,'as_dict') and callable(o.as_dict): 
35          return o.as_dict() 
36      else: 
37          raise TypeError(repr(o) + " is not JSON serializable") 
38   
39   
40 -def xml_rec(value, key): 
41      if hasattr(value,'custom_xml') and callable(value.custom_xml): 
42          return value.custom_xml() 
43      elif isinstance(value, (dict, Storage)): 
44          return TAG[key](*[TAG[k](xml_rec(v, '')) for k, v in value.items()]) 
45      elif isinstance(value, list): 
46          return TAG[key](*[TAG.item(xml_rec(item, '')) for item in value]) 
47      elif hasattr(value,'as_list') and callable(value.as_list): 
48          return str(xml_rec(value.as_list(),'')) 
49      elif hasattr(value,'as_dict') and callable(value.as_dict): 
50          return str(xml_rec(value.as_dict(),'')) 
51      else: 
52          return xmlescape(value) 
53   
54   
55 -def xml(value, encoding='UTF-8', key='document'): 
56      return ('<?xml version="1.0" encoding="%s"?>' % encoding) + str(xml_rec(value,key)) 
57   
58   
59 -def json(value,default=custom_json): 
60      return json_parser.dumps(value,default=default) 
61   
62   
63 -def csv(value): 
64      return '' 
65   
66   
67 -def rss(feed): 
68      if not 'entries' in feed and 'items' in feed: 
69          feed['entries'] = feed['items'] 
70      now=datetime.datetime.now() 
71      rss = rss2.RSS2(title = feed['title'], 
72                      link = str(feed['link']), 
73                      description = feed['description'], 
74                      lastBuildDate = feed.get('created_on', now), 
75                      items = [rss2.RSSItem(\ 
76                                          title=entry['title'], 
77                                          link=str(entry['link']), 
78                                          description=entry['description'], 
79                                          pubDate=entry.get('created_on', now) 
80                                          )\ 
81                                      for entry in feed['entries'] 
82                                      ] 
83                      ) 
84      return rss2.dumps(rss) 
85