-@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', 'odt', 'txt', 'mp3', 'ogg']
-
- # Create a ZIP archive
- temp = temp = tempfile.TemporaryFile()
- 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))
- 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')