+# Create your views here.
+import os.path
+from django.conf import settings
+from django.http import HttpResponse, Http404
+from catalogue.models import Chunk
+from django.views.decorators.http import require_POST
+from django.views.decorators.csrf import csrf_exempt
+from django.shortcuts import render
+
+
+PREVIEW_SIZE = (216, 300)
+
+def preview(request, book, chunk=None, rev=None):
+ """Creates a cover image.
+
+ If chunk and rev number are given, use version from given revision.
+ If rev is not given, use publishable version.
+ """
+ import Image
+ from librarian.cover import WLCover
+ from librarian.dcparser import BookInfo
+
+ chunk = Chunk.get(book, chunk)
+ if rev is not None:
+ try:
+ revision = chunk.at_revision(rev)
+ except Chunk.change_model.DoesNotExist:
+ raise Http404
+ else:
+ revision = chunk.publishable()
+ if revision is None:
+ raise Http404
+ xml = revision.materialize().encode('utf-8')
+
+ info = BookInfo.from_string(xml)
+ cover = WLCover(info)
+ response = HttpResponse(mimetype=cover.mime_type())
+ image = cover.image().resize(PREVIEW_SIZE, Image.ANTIALIAS)
+ image.save(response, cover.format)
+ return response
+
+
+@csrf_exempt
+@require_POST
+def preview_from_xml(request):
+ from hashlib import sha1
+ import Image
+ from os import makedirs
+ from lxml import etree
+ from librarian.cover import WLCover
+ from librarian.dcparser import BookInfo
+
+ xml = request.POST['xml']
+ info = BookInfo.from_string(xml.encode('utf-8'))
+ coverid = sha1(etree.tostring(info.to_etree())).hexdigest()
+ cover = WLCover(info)
+
+ cover_dir = 'cover/preview'
+ try:
+ makedirs(os.path.join(settings.MEDIA_ROOT, cover_dir))
+ except OSError:
+ pass
+ fname = os.path.join(cover_dir, "%s.%s" % (coverid, cover.ext()))
+ image = cover.image().resize(PREVIEW_SIZE, Image.ANTIALIAS)
+ image.save(os.path.join(settings.MEDIA_ROOT, fname))
+ return HttpResponse(os.path.join(settings.MEDIA_URL, fname))
fnp / redakcja.git / commitdiff