X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/7ad61a2597aadd17dd548c2ce6f20aa9c303e621..3eb790b08844dc0dda1888584ae3fcce2c1274b1:/apps/catalogue/views.py?ds=sidebyside diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py index 45dc7a029..e2e808f59 100644 --- a/apps/catalogue/views.py +++ b/apps/catalogue/views.py @@ -1,4 +1,7 @@ # -*- coding: utf-8 -*- +import tempfile +import zipfile + from django.template import RequestContext from django.shortcuts import render_to_response, get_object_or_404 from django.http import HttpResponse, HttpResponseRedirect, Http404 @@ -163,7 +166,7 @@ def tags_starting_with(request): # = 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() @@ -171,7 +174,7 @@ def user_shelves(request): 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) @@ -197,6 +200,39 @@ def book_sets(request, slug): context_instance=RequestContext(request)) +@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') + + # Create a ZIP archive + temp = temp = tempfile.TemporaryFile() + archive = zipfile.ZipFile(temp, 'w') + for book in models.Book.tagged.with_all(shelf): + if book.pdf_file: + filename = book.pdf_file.path + archive.write(filename, str('%s.pdf' % book.slug)) + if book.odt_file: + filename = book.odt_file.path + archive.write(filename, str('%s.odt' % book.slug)) + if book.txt_file: + filename = book.txt_file.path + archive.write(filename, str('%s.txt' % 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 + + @login_required @require_POST @cache.never_cache