X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/7ad61a2597aadd17dd548c2ce6f20aa9c303e621..bc0fb62d35eae0850d48e92bece1873664ca2410:/apps/catalogue/views.py?ds=sidebyside diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py index 45dc7a029..1180ab2fd 100644 --- a/apps/catalogue/views.py +++ b/apps/catalogue/views.py @@ -1,10 +1,23 @@ # -*- 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 sys +import pprint +import traceback +import re +import itertools +from operator import itemgetter + +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.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 @@ -12,7 +25,10 @@ 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.http import urlquote_plus from django.views.decorators import cache +from django.utils.translation import ugettext as _ +from django.views.generic.list_detail import object_list from catalogue import models from catalogue import forms @@ -20,93 +36,239 @@ from catalogue.utils import split_tags 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): return force_unicode(obj) return obj +# shortcut for JSON reponses +class JSONResponse(HttpResponse): + def __init__(self, data={}, callback=None, **kwargs): + # get rid of mimetype + kwargs.pop('mimetype', None) + data = simplejson.dumps(data) + if callback: + data = callback + "(" + data + ");" + super(JSONResponse, self).__init__(data, mimetype="application/json", **kwargs) + -@cache.cache_control(must_revalidate=True, max_age=3600) -def main_page(request): +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"' - 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]}) + + tags = models.Tag.objects.exclude(category__in=('set', 'book')) + for tag in tags: + tag.count = tag.get_count() categories = split_tags(tags) - + fragment_tags = categories.get('theme', []) + form = forms.SearchForm() return render_to_response('catalogue/main_page.html', locals(), context_instance=RequestContext(request)) def book_list(request): - books = models.Book.objects.all() form = forms.SearchForm() - - books_by_first_letter = SortedDict() - for book in books: - books_by_first_letter.setdefault(book.title[0], []).append(book) - + + books_by_parent = {} + for book in models.Book.objects.all().order_by('parent_number'): + books_by_parent.setdefault(book.parent, []).append(book) + + orphans = [] + books_by_author = SortedDict() + books_nav = SortedDict() + for tag in models.Tag.objects.filter(category='author'): + books_by_author[tag] = [] + if books_nav.has_key(tag.sort_key[0]): + books_nav[tag.sort_key[0]].append(tag) + else: + books_nav[tag.sort_key[0]] = [tag] + + for book in books_by_parent[None]: + authors = list(book.tags.filter(category='author')) + if authors: + for author in authors: + books_by_author[author].append(book) + else: + orphans.append(book) + return render_to_response('catalogue/book_list.html', locals(), context_instance=RequestContext(request)) -@cache.cache_control(must_revalidate=True, max_age=3600) +def differentiate_tags(request, tags, ambiguous_slugs): + beginning = '/'.join(tag.url_chunk for tag in tags) + unparsed = '/'.join(ambiguous_slugs[1:]) + options = [] + for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]): + options.append({ + 'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'), + 'tags': [tag] + }) + return render_to_response('catalogue/differentiate_tags.html', + {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]}, + context_instance=RequestContext(request)) + + def tagged_object_list(request, tags=''): - # Prevent DoS attacks on our database - if len(tags.split('/')) > 6: - raise Http404 - try: tags = models.Tag.get_tag_list(tags) except models.Tag.DoesNotExist: raise Http404 - - model = models.Book - 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 + except models.Tag.MultipleObjectsReturned, e: + return differentiate_tags(request, e.tags, e.ambiguous_slugs) - extra_where = 'NOT catalogue_tag.category = "set"' - related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]}) - categories = split_tags(related_tags) + try: + if len(tags) > settings.MAX_TAG_LIST: + raise Http404 + except AttributeError: + pass - if not theme_is_set: - model=models.Book.objects.filter(parent=None) - - return newtagging_views.tagged_object_list( + if len([tag for tag in tags if tag.category == 'book']): + raise Http404 + + theme_is_set = [tag for tag in tags if tag.category == 'theme'] + shelf_is_set = [tag for tag in tags if tag.category == 'set'] + only_shelf = shelf_is_set and len(tags) == 1 + only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user + + objects = only_author = pd_counter = None + categories = {} + + if theme_is_set: + shelf_tags = [tag for tag in tags if tag.category == 'set'] + fragment_tags = [tag for tag in tags if tag.category != 'set'] + fragments = models.Fragment.tagged.with_all(fragment_tags) + + if shelf_tags: + books = models.Book.tagged.with_all(shelf_tags).order_by() + l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books]) + fragments = models.Fragment.tagged.with_any(l_tags, fragments) + + # newtagging goes crazy if we just try: + #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True, + # extra={'where': ["catalogue_tag.category != 'book'"]}) + fragment_keys = [fragment.pk for fragment in fragments] + if fragment_keys: + related_tags = models.Fragment.tags.usage(counts=True, + filters={'pk__in': fragment_keys}, + extra={'where': ["catalogue_tag.category != 'book'"]}) + related_tags = (tag for tag in related_tags if tag not in fragment_tags) + categories = split_tags(related_tags) + + objects = fragments + else: + # get relevant books and their tags + objects = models.Book.tagged.with_all(tags) + if not shelf_is_set: + # eliminate descendants + l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in objects]) + descendants_keys = [book.pk for book in models.Book.tagged.with_any(l_tags)] + if descendants_keys: + objects = objects.exclude(pk__in=descendants_keys) + + # get related tags from `tag_counter` and `theme_counter` + related_counts = {} + tags_pks = [tag.pk for tag in tags] + for book in objects: + for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()): + if tag_pk in tags_pks: + continue + related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value + related_tags = models.Tag.objects.filter(pk__in=related_counts.keys()) + related_tags = [tag for tag in related_tags if tag not in tags] + for tag in related_tags: + tag.count = related_counts[tag.pk] + + categories = split_tags(related_tags) + del related_tags + + if not objects: + only_author = len(tags) == 1 and tags[0].category == 'author' + pd_counter = only_author and tags[0].goes_to_pd() + objects = models.Book.objects.none() + + return object_list( request, - tag_model=models.Tag, - queryset_or_model=model, - tags=tags, + objects, template_name='catalogue/tagged_object_list.html', - extra_context = {'categories': categories, 'shelf_is_set': shelf_is_set }, + extra_context={ + 'categories': categories, + 'only_shelf': only_shelf, + 'only_author': only_author, + 'pd_counter': pd_counter, + 'only_my_shelf': only_my_shelf, + 'formats_form': forms.DownloadFormatsForm(), + + 'tags': tags, + } ) +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, category='book') + theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme') + 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): - 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 = book.book_tag() tags = list(book.tags.filter(~Q(category='set'))) categories = split_tags(tags) book_children = book.children.all().order_by('parent_number') + _book = book + parents = [] + while _book.parent: + parents.append(_book.parent) + _book = _book.parent + parents = reversed(parents) + + theme_counter = book.theme_counter + book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys()) + for tag in book_themes: + tag.count = theme_counter[tag.pk] + + extra_info = book.get_extra_info_value() + 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) + if not book.has_html_file(): + raise Http404 book_themes = {} for fragment in book.fragments.all(): for theme in fragment.tags.filter(category='theme'): book_themes.setdefault(theme, []).append(fragment) - + book_themes = book_themes.items() book_themes.sort(key=lambda s: s[0].sort_key) return render_to_response('catalogue/book_text.html', locals(), @@ -116,87 +278,326 @@ def book_text(request, slug): # ========== # = Search = # ========== + +def _no_diacritics_regexp(query): + """ returns a regexp for searching for a query without diacritics + + should be locale-aware """ + names = { + u'a':u'aąĄ', u'c':u'cćĆ', u'e':u'eęĘ', u'l': u'lłŁ', u'n':u'nńŃ', u'o':u'oóÓ', u's':u'sśŚ', u'z':u'zźżŹŻ', + u'ą':u'ąĄ', u'ć':u'ćĆ', u'ę':u'ęĘ', u'ł': u'łŁ', u'ń':u'ńŃ', u'ó':u'óÓ', u'ś':u'śŚ', u'ź':u'źŹ', u'ż':u'żŻ' + } + def repl(m): + l = m.group() + return u"(%s)" % '|'.join(names[l]) + return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query) + +def unicode_re_escape(query): + """ Unicode-friendly version of re.escape """ + return re.sub('(?u)(\W)', r'\\\1', query) + +def _word_starts_with(name, prefix): + """returns a Q object getting models having `name` contain a word + starting with `prefix` + + We define word characters as alphanumeric and underscore, like in JS. + + Works for MySQL, PostgreSQL, Oracle. + For SQLite, _sqlite* version is substituted for this. + """ + kwargs = {} + + prefix = _no_diacritics_regexp(unicode_re_escape(prefix)) + # can't use [[:<:]] (word start), + # but we want both `xy` and `(xy` to catch `(xyz)` + kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix + + return Q(**kwargs) + + +def _sqlite_word_starts_with(name, prefix): + """ version of _word_starts_with for SQLite + + SQLite in Django uses Python re module + """ + kwargs = {} + prefix = _no_diacritics_regexp(unicode_re_escape(prefix)) + kwargs['%s__iregex' % name] = ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix + return Q(**kwargs) + + +if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3': + _word_starts_with = _sqlite_word_starts_with + + +def _tags_starting_with(prefix, user=None): + prefix = prefix.lower() + 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 and 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.url_chunk 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 type + + +def books_starting_with(prefix): + prefix = prefix.lower() + return models.Book.objects.filter(_word_starts_with('title', prefix)) + + +def find_best_matches(query, user=None): + """ Finds a Book, Tag or Bookstub best matching a query. + + Returns a with: + - zero elements when nothing is found, + - one element when a best result is found, + - more then one element on multiple exact matches + + Raises a ValueError on too short a query. + """ + + query = query.lower() + if len(query) < 2: + raise ValueError("query must have at least two characters") + + result = tuple(_tags_starting_with(query, user)) + exact_matches = tuple(res for res in result if res.name.lower() == query) + if exact_matches: + return exact_matches + else: + return result[:1] + + def search(request): - query = request.GET.get('q', '') tags = request.GET.get('tags', '') - if tags == '': - tags = [] + prefix = request.GET.get('q', '') 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')) - else: - tag_list.append(tag) - return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list', - kwargs={'tags': '/'.join(tag.slug for tag in tag_list)} - )) + except: + tag_list = [] - -def tags_starting_with(request): 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')) + result = find_best_matches(prefix, request.user) + except ValueError: + return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix}, + context_instance=RequestContext(request)) - completions = [book.title for book in books] + [tag.name for tag in tags] + if len(result) == 1: + return HttpResponseRedirect(_get_result_link(result[0], tag_list)) + elif len(result) > 1: + 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)) + 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('') - + tags_list = [] + result = "" + for tag in _tags_starting_with(prefix, request.user): + if not tag.name in tags_list: + result += "\n" + tag.name + tags_list.append(tag.name) + return HttpResponse(result) + +def json_tags_starting_with(request, callback=None): + # Callback for JSONP + prefix = request.GET.get('q', '') + callback = request.GET.get('callback', '') + # Prefix must have at least 2 characters + if len(prefix) < 2: + return HttpResponse('') + tags_list = [] + result = "" + for tag in _tags_starting_with(prefix, request.user): + if not tag.name in tags_list: + result += "\n" + tag.name + tags_list.append(tag.name) + dict_result = {"matches": tags_list} + return JSONResponse(dict_result, callback) # ==================== # = Shelf management = # ==================== @login_required -@cache.cache_control(must_revalidate=True, max_age=3600, private=True) +@cache.never_cache def user_shelves(request): shelves = models.Tag.objects.filter(category='set', user=request.user) new_set_form = forms.NewSetForm() return render_to_response('catalogue/user_shelves.html', locals(), context_instance=RequestContext(request)) - -@cache.cache_control(must_revalidate=True, max_age=3600, private=True) +@cache.never_cache def book_sets(request, slug): book = get_object_or_404(models.Book, slug=slug) user_sets = models.Tag.objects.filter(category='set', user=request.user) book_sets = book.tags.filter(category='set', user=request.user) - + if not request.user.is_authenticated(): - return HttpResponse('

Aby zarządzać swoimi półkami, musisz się zalogować.

') - + return HttpResponse(_('

To maintain your shelves you need to be logged in.

')) + 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 = None + shelf.save() + + for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]: + shelf.book_count = None + shelf.save() + + book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))) if request.is_ajax(): - return HttpResponse('

Półki zostały zapisane.

') + return HttpResponse(_('

Shelves were sucessfully saved.

')) else: return HttpResponseRedirect('/') else: form = forms.ObjectSetsForm(book, request.user) new_set_form = forms.NewSetForm() - + return render_to_response('catalogue/book_sets.html', locals(), context_instance=RequestContext(request)) +@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 = None + 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, + without loading the whole file into memory. A similar approach can + be used for large dynamic PDF files. + """ + 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', 'epub', 'odt', 'txt', 'mp3', 'ogg'] + + # Create a ZIP archive + temp = tempfile.TemporaryFile() + archive = zipfile.ZipFile(temp, 'w') + + already = set() + 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)) + if book.root_ancestor not in already and 'epub' in formats and book.root_ancestor.epub_file: + filename = book.root_ancestor.epub_file.path + archive.write(filename, str('%s.epub' % book.root_ancestor.slug)) + already.add(book.root_ancestor) + if 'odt' in formats and book.odt_file: + filename = book.odt_file.path + archive.write(filename, str('%s.odt' % book.slug)) + if 'txt' in formats and book.txt_file: + 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() + + 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() + + temp.seek(0) + response.write(temp.read()) + 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, 'epub': 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.root_ancestor.epub_file: + formats['epub'] = 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 @@ -206,12 +607,11 @@ def new_set(request): new_set = new_set_form.save(request.user) if request.is_ajax(): - return HttpResponse(u'

Półka %s została utworzona

' % new_set) + return HttpResponse(_('

Shelf %s was successfully created

') % new_set) else: return HttpResponseRedirect('/') - return render_to_response('catalogue/book_sets.html', locals(), - context_instance=RequestContext(request)) + return HttpResponseRedirect('/') @login_required @@ -222,7 +622,7 @@ def delete_shelf(request, slug): user_set.delete() if request.is_ajax(): - return HttpResponse(u'

Półka %s została usunięta

' % user_set.name) + return HttpResponse(_('

Shelf %s was successfully removed

') % user_set.name) else: return HttpResponseRedirect('/') @@ -249,7 +649,7 @@ def register(request): if registration_form.is_valid(): user = registration_form.save() user = auth.authenticate( - username=registration_form.cleaned_data['username'], + username=registration_form.cleaned_data['username'], password=registration_form.cleaned_data['password1'] ) auth.login(request, user) @@ -262,5 +662,35 @@ def register(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])) + 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'))