276 lines
8.3 KiB
Python
276 lines
8.3 KiB
Python
from datetime import datetime
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import os.path
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import random
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import re
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from HTMLParser import HTMLParser
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from django.shortcuts import render_to_response
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from django.template import RequestContext
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from django.http import HttpResponse, Http404
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from django.utils.functional import Promise
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from django.utils.translation import force_unicode, check_for_language
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from django.utils.simplejson import JSONEncoder
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from django import forms
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from django.template.defaultfilters import urlize as django_urlize
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from django.core.paginator import Paginator, EmptyPage, InvalidPage
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from django.conf import settings
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from forum import settings as forum_settings
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#compile smiles regexp
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_SMILES = [(re.compile(smile_re), path) for smile_re, path in forum_settings.SMILES]
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def render_to(template):
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"""
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Decorator for Django views that sends returned dict to render_to_response function.
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Template name can be decorator parameter or TEMPLATE item in returned dictionary.
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RequestContext always added as context instance.
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If view doesn't return dict then decorator simply returns output.
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Parameters:
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- template: template name to use
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Examples:
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# 1. Template name in decorator parameters
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@render_to('template.html')
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def foo(request):
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bar = Bar.object.all()
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return {'bar': bar}
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# equals to
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def foo(request):
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bar = Bar.object.all()
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return render_to_response('template.html',
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{'bar': bar},
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context_instance=RequestContext(request))
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# 2. Template name as TEMPLATE item value in return dictionary
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@render_to()
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def foo(request, category):
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template_name = '%s.html' % category
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return {'bar': bar, 'TEMPLATE': template_name}
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#equals to
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def foo(request, category):
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template_name = '%s.html' % category
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return render_to_response(template_name,
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{'bar': bar},
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context_instance=RequestContext(request))
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"""
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def renderer(function):
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def wrapper(request, *args, **kwargs):
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output = function(request, *args, **kwargs)
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if not isinstance(output, dict):
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return output
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tmpl = output.pop('TEMPLATE', template)
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return render_to_response(tmpl, output, context_instance=RequestContext(request))
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return wrapper
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return renderer
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def absolute_url(path):
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return 'http://%s%s' % (forum_settings.HOST, path)
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def paged(paged_list_name, per_page):
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"""
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Parse page from GET data and pass it to view. Split the
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query set returned from view.
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"""
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def decorator(func):
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def wrapper(request, *args, **kwargs):
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result = func(request, *args, **kwargs)
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if not isinstance(result, dict) or 'paged_qs' not in result:
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return result
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try:
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page = int(request.GET.get('page', 1))
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except ValueError:
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page = 1
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real_per_page = per_page
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#if per_page_var:
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#try:
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#value = int(request.GET[per_page_var])
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#except (ValueError, KeyError):
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#pass
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#else:
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#if value > 0:
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#real_per_page = value
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from django.core.paginator import Paginator
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paginator = Paginator(result['paged_qs'], real_per_page)
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try:
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result[paged_list_name] = paginator.page(page).object_list
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except (InvalidPage, EmptyPage):
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raise Http404
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result['page'] = page
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result['page_list'] = range(1, paginator.num_pages + 1)
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result['pages'] = paginator.num_pages
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result['per_page'] = real_per_page
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result['request'] = request
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return result
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return wrapper
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return decorator
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def ajax(func):
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"""
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Checks request.method is POST. Return error in JSON in other case.
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If view returned dict, returns JsonResponse with this dict as content.
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"""
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def wrapper(request, *args, **kwargs):
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if request.method == 'POST':
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try:
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response = func(request, *args, **kwargs)
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except Exception, ex:
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response = {'error': traceback.format_exc()}
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else:
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response = {'error': {'type': 403, 'message': 'Accepts only POST request'}}
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if isinstance(response, dict):
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return JsonResponse(response)
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else:
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return response
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return wrapper
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class LazyJSONEncoder(JSONEncoder):
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"""
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This fing need to save django from crashing.
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"""
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def default(self, o):
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if isinstance(o, Promise):
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return force_unicode(o)
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else:
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return super(LazyJSONEncoder, self).default(o)
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class JsonResponse(HttpResponse):
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"""
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HttpResponse subclass that serialize data into JSON format.
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"""
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def __init__(self, data, mimetype='application/json'):
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json_data = LazyJSONEncoder().encode(data)
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super(JsonResponse, self).__init__(
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content=json_data, mimetype=mimetype)
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def build_form(Form, _request, GET=False, *args, **kwargs):
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"""
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Shorcut for building the form instance of given form class
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"""
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if not GET and 'POST' == _request.method:
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form = Form(_request.POST, _request.FILES, *args, **kwargs)
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elif GET and 'GET' == _request.method:
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form = Form(_request.GET, _request.FILES, *args, **kwargs)
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else:
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form = Form(*args, **kwargs)
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return form
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class ExcludeTagsHTMLParser(HTMLParser):
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"""
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Class for html parsing with excluding specified tags.
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"""
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def __init__(self, func, tags=('a', 'code')):
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HTMLParser.__init__(self)
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self.func = func
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self.is_ignored = False
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self.tags = tags
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self.html = []
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def handle_starttag(self, tag, attrs):
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self.html.append('<%s%s>' % (tag, self.__html_attrs(attrs)))
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if tag in self.tags:
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self.is_ignored = True
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def handle_data(self, data):
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if not self.is_ignored:
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data = self.func(data)
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self.html.append(data)
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def handle_startendtag(self, tag, attrs):
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self.html.append('<%s%s/>' % (tag, self.__html_attrs(attrs)))
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def handle_endtag(self, tag):
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self.is_ignored = False
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self.html.append('</%s>' % (tag))
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def handle_entityref(self, name):
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self.html.append('&%s;' % name)
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def handle_charref(self, name):
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self.html.append('&%s;' % name)
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def __html_attrs(self, attrs):
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_attrs = ''
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if attrs:
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_attrs = ' %s' % (' '.join([('%s="%s"' % (k,v)) for k,v in attrs]))
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return _attrs
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def feed(self, data):
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HTMLParser.feed(self, data)
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self.html = ''.join(self.html)
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def urlize(data):
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"""
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Urlize plain text links in the HTML contents.
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Do not urlize content of A and CODE tags.
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"""
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parser = ExcludeTagsHTMLParser(django_urlize)
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parser.feed(data)
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urlized_html = parser.html
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parser.close()
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return urlized_html
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def _smile_replacer(data):
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for smile, path in _SMILES:
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data = smile.sub(path, data)
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return data
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def smiles(data):
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"""
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Replace text smiles.
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"""
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parser = ExcludeTagsHTMLParser(_smile_replacer)
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parser.feed(data)
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smiled_html = parser.html
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parser.close()
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return smiled_html
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def paginate(items, request, per_page, total_count=None):
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try:
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page_number = int(request.GET.get('page', 1))
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except ValueError:
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page_number = 1
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paginator = Paginator(items, per_page)
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pages = paginator.num_pages
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try:
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paged_list_name = paginator.page(page_number).object_list
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except (InvalidPage, EmptyPage):
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raise Http404
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return pages, paginator, paged_list_name
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def set_language(request, language):
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"""
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Change the language of session of authenticated user.
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"""
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if language and check_for_language(language):
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if hasattr(request, 'session'):
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request.session['django_language'] = language
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else:
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response.set_cookie(settings.LANGUAGE_COOKIE_NAME, language)
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