sstatic.py

import os
import random
import string

from django import template
from django.conf import settings
from django.core.cache import cache

# credits : https://bitbucket.org/ad3w/django-sstatic

register = template.Library()


@register.simple_tag(takes_context=True)
def sstatic(context, path):
    url = cache.get(path)
    if url:
        return url
    url = get_absolut_url(context["request"], compute_url_for_path(path))
    cache.set(path, url, None)
    return url


def get_absolut_url(request, relative_url):
    return "%s://%s%s" % (getattr(settings, "DEFAULT_SCHEME", request.scheme), request.get_host(), relative_url)


def compute_url_for_path(path):
    '''
    Returns absolute URL to static file with versioning.
    '''
    try:
        full_path = os.path.join(settings.STATIC_ROOT, path[1:] if path[0] == '/' else path)
        # Get file modification time.
        mtime = os.path.getmtime(full_path)
        return '%s%s?%s' % (settings.STATIC_URL[:-1], path, mtime)
    except OSError:
        pass
    except TypeError:
        pass
    # Returns normal url if this file was not found in filesystem.
    return '%s%s?%s' % (settings.STATIC_URL[:-1], path, ''.join(
        random.choice(''.join((string.ascii_letters, string.digits))) for _ in range(4)))