def thumbnails(html): """ Given a HTML string, converts paths in img tags to thumbnail paths, using Mezzanine's ``thumbnail`` template tag. Used as one of the default values in the ``RICHTEXT_FILTERS`` setting. """ from django.conf import settings from html5lib.treebuilders import getTreeBuilder from html5lib.html5parser import HTMLParser #from mezzanine.core.templatetags.mezzanine_tags import thumbnail from asylum_custom.templatetags.asylum_tags import thumbnail dom = HTMLParser(tree=getTreeBuilder("dom")).parse(html) for img in dom.getElementsByTagName("img"): src = img.getAttribute("src") width = img.getAttribute("width") height = img.getAttribute("height") if src and width and height: src = settings.MEDIA_URL + thumbnail(src, width, height) img.setAttribute("src", src) nodes = dom.getElementsByTagName("body")[0].childNodes return "".join([node.toxml() for node in nodes])