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0001-misc-add-a-new-statics_hash-in-context-variables-887.patch

Frédéric Péters, 18 novembre 2015 12:28

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Subject: [PATCH] misc: add a new statics_hash in context variables (#8875)

This variable is to be used to prevent browser using stale resources
(javascript and stylesheets) after package upgrades.

Use it like href="{% static 'foobar.css' %}?{{statics_hash}}".

It is computed from installed module versions + the access time of
/var/lib/publik/theme-counter (so it's possible to "force" a reload by touching
that file).

 hobo/__init__.py           |  3 +++
 hobo/context_processors.py | 16 ++++++++++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)
hobo/__init__.py
1 
# import the context_processors module so it gets to compute the versions hash
2 
# early on.
3 
from . import context_processors
hobo/context_processors.py
3 3 
import logging
4 4 
import requests
5 5 
import threading
6 
import os
6 7 
import urlparse
7 8 

  		




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from django.conf import settings

  		




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from django.core.cache import cache

  		




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from django.template import Template

  		




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def template_vars(request):

  		




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    return getattr(settings, 'TEMPLATE_VARS', {})

  		




  
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from hobo.scrutiny.wsgi.middleware import VersionMiddleware

  		




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logger = logging.getLogger('hobo')

  		




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CACHE_REFRESH_TIMEOUT = 300

  		




  
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VERSIONS = VersionMiddleware.get_packages_version()

  		




  
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def template_vars(request):

  		




  
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    statics_hash = hashlib.md5(repr(sorted(VERSIONS.items())))

  		




  
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    try:

  		




  
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        statics_hash.update(str(os.stat('/var/lib/publik/theme-counter').st_atime))

  		




  
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    except OSError:

  		




  
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        pass

  		




  
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    template_vars = getattr(settings, 'TEMPLATE_VARS', {})

  		




  
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    template_vars.update({'statics_hash': statics_hash.hexdigest()})

  		




  
  29
  
    
    return template_vars

  		




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class RemoteTemplate(object):

  		




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    def __init__(self, source):

  		




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