PyPI 官网下载 | django-cachebuster-0.2.1.tar.gz

__author__ = 'James Addison' import posixpath import datetime import urllib import os from django import template from django.conf import settings try: # finders won't exist if we're not using Django 1.3+ from django.contrib.staticfiles import finders except ImportError: finders = None register = template.Library() @register.tag(name="media") def do_media(parser, token): return CacheBusterTag(token, True) @register.tag(name="static") def do_static(parser, token): return CacheBusterTag(token, False) class CacheBusterTag(template.Node): def __init__(self, token, is_media): self.is_media = is_media try: tokens = token.split_contents() except ValueError: raise template.TemplateSyntaxError, "'%r' tag must have one or two arguments" % token.contents.split()[0] self.path = tokens[1] self.force_timestamp = len(tokens) == 3 and tokens[2] or False def render(self, context): # self.path may be a template variable rather than a simple static file string try: path = template.Variable(self.path).resolve(context) except template.VariableDoesNotExist: path = self.path path = posixpath.normpath(urllib.unquote(path)).lstrip('/') if self.is_media: url_prepend = settings.MEDIA_URL unique_prepend = getattr(settings, 'CACHEBUSTER_PREPEND_MEDIA', False) unique_string = self.get_file_modified(os.path.join(settings.MEDIA_ROOT, path)) else: # django versions < 1.3 don't have a STATIC_URL, so fall back to MEDIA_URL url_prepend = getattr(settings, "STATIC_URL", settings.MEDIA_URL) unique_prepend = getattr(settings, 'CACHEBUSTER_PREPEND_STATIC', False) if settings.DEBUG and finders: absolute_path = finders.find(path) else: # django versions < 1.3 don't have a STATIC_ROOT, so fall back to MEDIA_ROOT absolute_path = os.path.join(getattr(settings, 'STATIC_ROOT', settings.MEDIA_ROOT), path) if self.force_timestamp: unique_string = self.get_file_modified(absolute_path) else: unique_string = getattr(settings, 'CACHEBUSTER_UNIQUE_STRING', None) if not unique_string: unique_string = self.get_file_modified(absolute_path) # Add in harder cachebusting required for CloudFront et al if unique_prepend: return url_prepend + unique_string + '/' + path else: return url_prepend + path + '?' + unique_string def get_file_modified(self, path): try: return datetime.datetime.fromtimestamp(os.path.getmtime(os.path.abspath(path))).strftime('%S%M%H%d%m%y') except: # if the file can't be found, return this; it will be an # indicator to the developer that collectstatic needs to be run # (as if the resulting 404 for the missing file wouldn't be) return '000000000000'