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File gluon/ artifact aeb8c6ffcb part of check-in f6c84eb8e3

This file is part of the web2py Web Framework
Copyrighted by Massimo Di Pierro <>
License: LGPLv3 (
import datetime
from storage import Storage
from html import TAG
from html import xmlescape
from languages import lazyT
import contrib.rss2 as rss2

    import json as json_parser                      # try stdlib (Python 2.6)
except ImportError:
        import simplejson as json_parser            # try external module
        import contrib.simplejson as json_parser    # fallback to pure-Python module

def custom_json(o):
    if hasattr(o,'custom_json') and callable(o.custom_json):
        return o.custom_json()
    if isinstance(o, (,
        return o.isoformat()[:19].replace('T',' ')
    elif isinstance(o, (int, long)):
        return int(o)
    elif isinstance(o, lazyT):
        return str(o)
    elif hasattr(o,'as_list') and callable(o.as_list):
        return o.as_list()
    elif hasattr(o,'as_dict') and callable(o.as_dict):
        return o.as_dict()
        raise TypeError(repr(o) + " is not JSON serializable")

def xml_rec(value, key):
    if hasattr(value,'custom_xml') and callable(value.custom_xml):
        return value.custom_xml()
    elif isinstance(value, (dict, Storage)):
        return TAG[key](*[TAG[k](xml_rec(v, '')) for k, v in value.items()])
    elif isinstance(value, list):
        return TAG[key](*[TAG.item(xml_rec(item, '')) for item in value])
    elif hasattr(value,'as_list') and callable(value.as_list):
        return str(xml_rec(value.as_list(),''))
    elif hasattr(value,'as_dict') and callable(value.as_dict):
        return str(xml_rec(value.as_dict(),''))
        return xmlescape(value)

def xml(value, encoding='UTF-8', key='document'):
    return ('<?xml version="1.0" encoding="%s"?>' % encoding) + str(xml_rec(value,key))

def json(value,default=custom_json):
    return json_parser.dumps(value,default=default)

def csv(value):
    return ''

def rss(feed):
    if not 'entries' in feed and 'items' in feed:
        feed['entries'] = feed['items']
    rss = rss2.RSS2(title = feed['title'],
                    link = str(feed['link']),
                    description = feed['description'],
                    lastBuildDate = feed.get('created_on', now),
                    items = [rss2.RSSItem(\
                                        pubDate=entry.get('created_on', now)
                                    for entry in feed['entries']
    return rss2.dumps(rss)