Shelf sharing (#301)

[wolnelektury.git] / apps / catalogue / views.py

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index 0026c17..cf1461f 100644 (file)
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -1,13 +1,21 @@
 # -*- coding: utf-8 -*-
 # -*- coding: utf-8 -*-

+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#

 import tempfile
 import zipfile
 import tempfile
 import zipfile

+import sys
+import pprint
+import traceback
+import re

 
 

+from django.conf import settings

 from django.template import RequestContext
 from django.shortcuts import render_to_response, get_object_or_404
 from django.http import HttpResponse, HttpResponseRedirect, Http404
 from django.core.urlresolvers import reverse
 from django.db.models import Q
 from django.template import RequestContext
 from django.shortcuts import render_to_response, get_object_or_404
 from django.http import HttpResponse, HttpResponseRedirect, Http404
 from django.core.urlresolvers import reverse
 from django.db.models import Q

-from django.contrib.auth.decorators import login_required
+from django.contrib.auth.decorators import login_required, user_passes_test

 from django.utils.datastructures import SortedDict
 from django.views.decorators.http import require_POST
 from django.contrib import auth
 from django.utils.datastructures import SortedDict
 from django.views.decorators.http import require_POST
 from django.contrib import auth


@@ -15,8 +23,9 @@ from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
 from django.utils import simplejson
 from django.utils.functional import Promise
 from django.utils.encoding import force_unicode
 from django.utils import simplejson
 from django.utils.functional import Promise
 from django.utils.encoding import force_unicode

+from django.utils.http import urlquote_plus

 from django.views.decorators import cache
 from django.views.decorators import cache

-from django.core.servers.basehttp import FileWrapper
+from django.utils.translation import ugettext as _

 
 from catalogue import models
 from catalogue import forms
 
 from catalogue import models
 from catalogue import forms


@@ -24,6 +33,9 @@ from catalogue.utils import split_tags
 from newtagging import views as newtagging_views
 
 
 from newtagging import views as newtagging_views
 
 

+staff_required = user_passes_test(lambda user: user.is_staff)
+
+

 class LazyEncoder(simplejson.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, Promise):
 class LazyEncoder(simplejson.JSONEncoder):
     def default(self, obj):
         if isinstance(obj, Promise):


@@ -31,15 +43,14 @@ class LazyEncoder(simplejson.JSONEncoder):
         return obj
 
 
         return obj
 
 

-@cache.cache_control(must_revalidate=True, max_age=3600)

 def main_page(request):    
     if request.user.is_authenticated():
         shelves = models.Tag.objects.filter(category='set', user=request.user)
         new_set_form = forms.NewSetForm()
 def main_page(request):    
     if request.user.is_authenticated():
         shelves = models.Tag.objects.filter(category='set', user=request.user)
         new_set_form = forms.NewSetForm()

-    extra_where = 'NOT catalogue_tag.category = "set"'
+    extra_where = "NOT catalogue_tag.category = 'set'"

     tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
     fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,
     tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
     fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,

-        extra={'where': ['catalogue_tag.category = "theme"'] + [extra_where]})
+        extra={'where': ["catalogue_tag.category = 'theme'"] + [extra_where]})

     categories = split_tags(tags)
     
     form = forms.SearchForm()
     categories = split_tags(tags)
     
     form = forms.SearchForm()


@@ -59,7 +70,6 @@ def book_list(request):
         context_instance=RequestContext(request))
 
 
         context_instance=RequestContext(request))
 
 

-@cache.cache_control(must_revalidate=True, max_age=3600)

 def tagged_object_list(request, tags=''):
     # Prevent DoS attacks on our database
     if len(tags.split('/')) > 6:
 def tagged_object_list(request, tags=''):
     # Prevent DoS attacks on our database
     if len(tags.split('/')) > 6:


@@ -70,17 +80,25 @@ def tagged_object_list(request, tags=''):
     except models.Tag.DoesNotExist:
         raise Http404
     
     except models.Tag.DoesNotExist:
         raise Http404
     

+    if len([tag for tag in tags if tag.category == 'book']):
+        raise Http404
+    

     model = models.Book
     model = models.Book

+    shelf = [tag for tag in tags if tag.category == 'set']

     shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
     theme_is_set = len([tag for tag in tags if tag.category == 'theme']) > 0
     if theme_is_set:
         model = models.Fragment
     shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
     theme_is_set = len([tag for tag in tags if tag.category == 'theme']) > 0
     if theme_is_set:
         model = models.Fragment

+    only_author = len(tags) == 1 and tags[0].category == 'author'
+    pd_counter = only_author and tags[0].goes_to_pd()

 
 

-    extra_where = 'NOT catalogue_tag.category = "set"'
+    user_is_owner = (len(shelf) and request.user.is_authenticated() and request.user == shelf[0].user)
+    
+    extra_where = "catalogue_tag.category NOT IN ('set', 'book')"

     related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
     categories = split_tags(related_tags)
 
     related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
     categories = split_tags(related_tags)
 

-    if not theme_is_set:
+    if not (theme_is_set or shelf_is_set):

         model=models.Book.objects.filter(parent=None)
     
     return newtagging_views.tagged_object_list(
         model=models.Book.objects.filter(parent=None)
     
     return newtagging_views.tagged_object_list(


@@ -89,21 +107,56 @@ def tagged_object_list(request, tags=''):
         queryset_or_model=model,
         tags=tags,
         template_name='catalogue/tagged_object_list.html',
         queryset_or_model=model,
         tags=tags,
         template_name='catalogue/tagged_object_list.html',

-        extra_context = {'categories': categories, 'shelf_is_set': shelf_is_set },
+        extra_context = {
+            'categories': categories,
+            'shelf_is_set': shelf_is_set,
+            'only_author': only_author,
+            'pd_counter': pd_counter,
+            'user_is_owner': user_is_owner,
+            'formats_form': forms.DownloadFormatsForm(),
+        },

     )
 
 
     )
 
 

+def book_fragments(request, book_slug, theme_slug):
+    book = get_object_or_404(models.Book, slug=book_slug)
+    book_tag = get_object_or_404(models.Tag, slug='l-' + book_slug)
+    theme = get_object_or_404(models.Tag, slug=theme_slug)
+    fragments = models.Fragment.tagged.with_all([book_tag, theme])
+    
+    form = forms.SearchForm()
+    return render_to_response('catalogue/book_fragments.html', locals(),
+        context_instance=RequestContext(request))
+
+

 def book_detail(request, slug):
 def book_detail(request, slug):

-    book = get_object_or_404(models.Book, slug=slug)
+    try:
+        book = models.Book.objects.get(slug=slug)
+    except models.Book.DoesNotExist:
+        return book_stub_detail(request, slug)
+
+    book_tag = get_object_or_404(models.Tag, slug = 'l-' + slug)

     tags = list(book.tags.filter(~Q(category='set')))
     categories = split_tags(tags)
     book_children = book.children.all().order_by('parent_number')
     tags = list(book.tags.filter(~Q(category='set')))
     categories = split_tags(tags)
     book_children = book.children.all().order_by('parent_number')

+    extra_where = "catalogue_tag.category = 'theme'"
+    book_themes = models.Tag.objects.related_for_model(book_tag, models.Fragment, counts=True, extra={'where': [extra_where]})
+    extra_info = book.get_extra_info_value()

     
     form = forms.SearchForm()
     return render_to_response('catalogue/book_detail.html', locals(),
         context_instance=RequestContext(request))
 
 
     
     form = forms.SearchForm()
     return render_to_response('catalogue/book_detail.html', locals(),
         context_instance=RequestContext(request))
 
 

+def book_stub_detail(request, slug):
+    book = get_object_or_404(models.BookStub, slug=slug)
+    pd_counter = book.pd
+    form = forms.SearchForm()
+    
+    return render_to_response('catalogue/book_stub_detail.html', locals(),
+        context_instance=RequestContext(request))
+    
+

 def book_text(request, slug):
     book = get_object_or_404(models.Book, slug=slug)
     book_themes = {}
 def book_text(request, slug):
     book = get_object_or_404(models.Book, slug=slug)
     book_themes = {}


@@ -120,47 +173,118 @@ def book_text(request, slug):
 # ==========
 # = Search =
 # ==========
 # ==========
 # = Search =
 # ==========

-def search(request):
-    query = request.GET.get('q', '')
-    tags = request.GET.get('tags', '')
-    if tags == '':
-        tags = []

 
 

-    try:
-        tag_list = models.Tag.get_tag_list(tags)
-        tag = models.Tag.objects.get(name=query)
-    except models.Tag.DoesNotExist:
-        try:
-            book = models.Book.objects.get(title=query)
-            return HttpResponseRedirect(book.get_absolute_url())
-        except models.Book.DoesNotExist:
-            return HttpResponseRedirect(reverse('catalogue.views.main_page'))
+def _no_diacritics_regexp(query):
+    """ returns a regexp for searching for a query without diacritics
+    
+    should be locale-aware """
+    names = {'a':u'ą', 'c':u'ć', 'e':u'ę', 'l': u'ł', 'n':u'ń', 'o':u'ó', 's':u'ś', 'z':u'ź|ż'}
+    def repl(m):
+        l = m.group()
+        return "(%s|%s)" % (l, names[l])
+    return re.sub('[%s]'%(''.join(names.keys())), repl, query)
+
+def _word_starts_with(name, prefix):
+    """returns a Q object getting models having `name` contain a word
+    starting with `prefix`
+    """
+    kwargs = {}
+    if settings.DATABASE_ENGINE in ('mysql', 'postgresql_psycopg2', 'postgresql'):
+        prefix = _no_diacritics_regexp(re.escape(prefix))
+        # we could use a [[:<:]] (word start), 
+        # but we want both `xy` and `(xy` to catch `(xyz)`
+        kwargs['%s__iregex' % name] = u"(^|[^[:alpha:]])%s" % prefix

     else:
     else:

-        tag_list.append(tag)
-        return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list', 
-            kwargs={'tags': '/'.join(tag.slug for tag in tag_list)}
-        ))
+        # don't know how to do a generic regex
+        # checking for simple icontain instead
+        kwargs['%s__icontains' % name] = prefix
+    return Q(**kwargs)
+
+
+def _tags_exact_matches(prefix, user):
+    book_stubs = models.BookStub.objects.filter(title__iexact = prefix)
+    books = models.Book.objects.filter(title__iexact = prefix)
+    book_stubs = filter(lambda x: x not in books, book_stubs)
+    tags = models.Tag.objects.filter(name__iexact = prefix)
+    if user.is_authenticated():
+        tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
+    else:
+        tags = tags.filter(~Q(category='book') & ~Q(category='set'))

 
 

+    return list(books) + list(tags) + list(book_stubs)

 
 

-def tags_starting_with(request):
+
+def _tags_starting_with(prefix, user):
+    book_stubs = models.BookStub.objects.filter(_word_starts_with('title', prefix))
+    books = models.Book.objects.filter(_word_starts_with('title', prefix))
+    book_stubs = filter(lambda x: x not in books, book_stubs)
+    tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
+    if user.is_authenticated():
+        tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
+    else:
+        tags = tags.filter(~Q(category='book') & ~Q(category='set'))
+
+    return list(books) + list(tags) + list(book_stubs)
+        
+
+
+def _get_result_link(match, tag_list):
+    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
+        return match.get_absolute_url()
+    else:
+        return reverse('catalogue.views.tagged_object_list', 
+            kwargs={'tags': '/'.join(tag.slug for tag in tag_list + [match])}
+        )
+
+def _get_result_type(match):
+    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
+        type = 'book'
+    else:
+        type = match.category
+    return dict(models.TAG_CATEGORIES)[type]
+    
+
+
+def search(request):
+    tags = request.GET.get('tags', '')
+    prefix = request.GET.get('q', '')
+    

     try:
     try:

-        prefix = request.GET['q']
-        if len(prefix) < 2:
-            raise KeyError
-
-        books = models.Book.objects.filter(title__icontains=prefix)
-        tags = models.Tag.objects.filter(name__icontains=prefix)
-        if request.user.is_authenticated():
-            tags = tags.filter(~Q(category='set') | Q(user=request.user))
-        else:
-            tags = tags.filter(~Q(category='set'))
+        tag_list = models.Tag.get_tag_list(tags)
+    except:
+        tag_list = []

 
 

-        completions = [book.title for book in books] + [tag.name for tag in tags]
+    # Prefix must have at least 2 characters
+    if len(prefix) < 2:
+        return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
+            context_instance=RequestContext(request))
+    
+    result = _tags_exact_matches(prefix, request.user)
+    
+    if len(result) > 1:
+        # multiple exact matches
+        return render_to_response('catalogue/search_multiple_hits.html', 
+            {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
+            context_instance=RequestContext(request))
+    
+    if not result:
+        # no exact matches
+        result = _tags_starting_with(prefix, request.user)
+    
+    if result:
+        return HttpResponseRedirect(_get_result_link(result[0], tag_list))
+    else:
+        return render_to_response('catalogue/search_no_hits.html', {'tags':tag_list, 'prefix':prefix},
+            context_instance=RequestContext(request))

 
 

-        return HttpResponse('\n'.join(completions))    

 
 

-    except KeyError:
+def tags_starting_with(request):
+    prefix = request.GET.get('q', '')
+    # Prefix must have at least 2 characters
+    if len(prefix) < 2:

         return HttpResponse('')
         return HttpResponse('')

+    
+    return HttpResponse('\n'.join(tag.name for tag in _tags_starting_with(prefix, request.user)))

 
 
 # ====================
 
 
 # ====================


@@ -174,7 +298,6 @@ def user_shelves(request):
     return render_to_response('catalogue/user_shelves.html', locals(),
             context_instance=RequestContext(request))
 
     return render_to_response('catalogue/user_shelves.html', locals(),
             context_instance=RequestContext(request))
 

-

 @cache.never_cache
 def book_sets(request, slug):
     book = get_object_or_404(models.Book, slug=slug)
 @cache.never_cache
 def book_sets(request, slug):
     book = get_object_or_404(models.Book, slug=slug)


@@ -182,15 +305,25 @@ def book_sets(request, slug):
     book_sets = book.tags.filter(category='set', user=request.user)
     
     if not request.user.is_authenticated():
     book_sets = book.tags.filter(category='set', user=request.user)
     
     if not request.user.is_authenticated():

-        return HttpResponse('<p>Aby zarządzać swoimi półkami, musisz się zalogować.</p>')
+        return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))

     
     if request.method == 'POST':
         form = forms.ObjectSetsForm(book, request.user, request.POST)
         if form.is_valid():
     
     if request.method == 'POST':
         form = forms.ObjectSetsForm(book, request.user, request.POST)
         if form.is_valid():

-            book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
-                list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
+            old_shelves = list(book.tags.filter(category='set'))
+            new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
+            
+            for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
+                shelf.book_count -= 1
+                shelf.save()
+                
+            for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
+                shelf.book_count += 1
+                shelf.save()
+            
+            book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))

             if request.is_ajax():
             if request.is_ajax():

-                return HttpResponse('<p>Półki zostały zapisane.</p>')
+                return HttpResponse(_('<p>Shelves were sucessfully saved.</p>'))

             else:
                 return HttpResponseRedirect('/')
     else:
             else:
                 return HttpResponseRedirect('/')
     else:


@@ -201,7 +334,38 @@ def book_sets(request, slug):
         context_instance=RequestContext(request))
 
 
         context_instance=RequestContext(request))
 
 

-@cache.cache_control(must_revalidate=True, max_age=1800)
+@login_required
+@require_POST
+@cache.never_cache
+def remove_from_shelf(request, shelf, book):
+    book = get_object_or_404(models.Book, slug=book)
+    shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
+    
+    if shelf in book.tags:
+        models.Tag.objects.remove_tag(book, shelf)
+
+        shelf.book_count -= 1
+        shelf.save()
+
+        return HttpResponse(_('Book was successfully removed from the shelf'))
+    else:
+        return HttpResponse(_('This book is not on the shelf'))
+
+
+def collect_books(books):
+    """
+    Returns all real books in collection.
+    """
+    result = []
+    for book in books:
+        if len(book.children.all()) == 0:
+            result.append(book)
+        else:
+            result += collect_books(book.children.all())
+    return result
+
+
+@cache.never_cache

 def download_shelf(request, slug):
     """"
     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 def download_shelf(request, slug):
     """"
     Create a ZIP archive on disk and transmit it in chunks of 8KB,


@@ -210,30 +374,68 @@ def download_shelf(request, slug):
     """
     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
     
     """
     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
     

+    formats = []
+    form = forms.DownloadFormatsForm(request.GET)
+    if form.is_valid():
+        formats = form.cleaned_data['formats']
+    if len(formats) == 0:
+        formats = ['pdf', 'odt', 'txt', 'mp3', 'ogg']
+    

     # Create a ZIP archive
     temp = tempfile.TemporaryFile()
     # Create a ZIP archive
     temp = tempfile.TemporaryFile()

-    archive = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
-    for book in models.Book.tagged.with_all(shelf):
-        if book.pdf_file:
+    archive = zipfile.ZipFile(temp, 'w')
+    
+    for book in collect_books(models.Book.tagged.with_all(shelf)):
+        if 'pdf' in formats and book.pdf_file:

             filename = book.pdf_file.path
             archive.write(filename, str('%s.pdf' % book.slug))
             filename = book.pdf_file.path
             archive.write(filename, str('%s.pdf' % book.slug))

-        if book.odt_file:
+        if 'odt' in formats and book.odt_file:

             filename = book.odt_file.path
             archive.write(filename, str('%s.odt' % book.slug))
             filename = book.odt_file.path
             archive.write(filename, str('%s.odt' % book.slug))

-        if book.txt_file:
+        if 'txt' in formats and book.txt_file:

             filename = book.txt_file.path
             archive.write(filename, str('%s.txt' % book.slug))
             filename = book.txt_file.path
             archive.write(filename, str('%s.txt' % book.slug))

+        if 'mp3' in formats and book.mp3_file:
+            filename = book.mp3_file.path
+            archive.write(filename, str('%s.mp3' % book.slug))
+        if 'ogg' in formats and book.ogg_file:
+            filename = book.ogg_file.path
+            archive.write(filename, str('%s.ogg' % book.slug))

     archive.close()
     
     archive.close()
     

-    # Write file to archive in small chunks
-    wrapper = FileWrapper(temp)
-    response = HttpResponse(wrapper, content_type='application/zip')
+    response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')

     response['Content-Disposition'] = 'attachment; filename=%s.zip' % shelf.sort_key
     response['Content-Length'] = temp.tell()
     response['Content-Disposition'] = 'attachment; filename=%s.zip' % shelf.sort_key
     response['Content-Length'] = temp.tell()

+    

     temp.seek(0)
     temp.seek(0)

+    response.write(temp.read())

     return response
 
 
     return response
 
 

+@cache.never_cache
+def shelf_book_formats(request, shelf):
+    """"
+    Returns a list of formats of books in shelf.
+    """
+    shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
+
+    formats = {'pdf': False, 'odt': False, 'txt': False, 'mp3': False, 'ogg': False}
+    
+    for book in collect_books(models.Book.tagged.with_all(shelf)):
+        if book.pdf_file:
+            formats['pdf'] = True
+        if book.odt_file:
+            formats['odt'] = True
+        if book.txt_file:
+            formats['txt'] = True
+        if book.mp3_file:
+            formats['mp3'] = True
+        if book.ogg_file:
+            formats['ogg'] = True
+
+    return HttpResponse(LazyEncoder().encode(formats))
+
+

 @login_required
 @require_POST
 @cache.never_cache
 @login_required
 @require_POST
 @cache.never_cache


@@ -243,12 +445,11 @@ def new_set(request):
         new_set = new_set_form.save(request.user)
 
         if request.is_ajax():
         new_set = new_set_form.save(request.user)
 
         if request.is_ajax():

-            return HttpResponse(u'<p>Półka <strong>%s</strong> została utworzona</p>' % new_set)
+            return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully created</p>') % new_set)

         else:
             return HttpResponseRedirect('/')
 
         else:
             return HttpResponseRedirect('/')
 

-    return render_to_response('catalogue/book_sets.html', locals(),
-            context_instance=RequestContext(request))
+    return HttpResponseRedirect('/')

 
 
 @login_required
 
 
 @login_required


@@ -259,7 +460,7 @@ def delete_shelf(request, slug):
     user_set.delete()
 
     if request.is_ajax():
     user_set.delete()
 
     if request.is_ajax():

-        return HttpResponse(u'<p>Półka <strong>%s</strong> została usunięta</p>' % user_set.name)
+        return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)

     else:
         return HttpResponseRedirect('/')
 
     else:
         return HttpResponseRedirect('/')
 


@@ -299,5 +500,36 @@ def register(request):
 @cache.never_cache
 def logout_then_redirect(request):
     auth.logout(request)
 @cache.never_cache
 def logout_then_redirect(request):
     auth.logout(request)

-    return HttpResponseRedirect(request.GET.get('next', '/'))
+    return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))
+
+
+
+# =========
+# = Admin =
+# =========
+@login_required
+@staff_required
+def import_book(request):
+    """docstring for import_book"""
+    book_import_form = forms.BookImportForm(request.POST, request.FILES)
+    if book_import_form.is_valid():
+        try:
+            book_import_form.save()
+        except:
+            info = sys.exc_info()
+            exception = pprint.pformat(info[1])
+            tb = '\n'.join(traceback.format_tb(info[2]))
+            _('Today is %(month)s, %(day)s.') % {'month': m, 'day': d}
+            return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
+        return HttpResponse(_("Book imported successfully"))
+    else:
+        return HttpResponse(_("Error importing file: %r") % book_import_form.errors)

 
 

+
+
+def clock(request):
+    """ Provides server time for jquery.countdown,
+    in a format suitable for Date.parse()
+    """
+    from datetime import datetime
+    return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))
\ No newline at end of file