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

Frédéric Péters, 18 novembre 2015 14:08

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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
settings.STATICS_HASH_COUNTER (so it's possible to "force" a reload by touching
that file).

Set settings.STATICS_HASH_COUNTER to /var/lib/publik/statics-counter in the
debian packaging.

 debian/debian_config_common.py |  2 ++
 hobo/__init__.py               |  3 +++
 hobo/context_processors.py     | 18 ++++++++++++++++--
 3 files changed, 21 insertions(+), 2 deletions(-)
debian/debian_config_common.py
194 194 
# Celery configuration
195 195 
BROKER_URL = 'amqp://'
196 196 
BROKER_TASK_EXPIRES = 120
197 

  		




  
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STATICS_HASH_COUNTER = '/var/lib/publik/statics-counter'

  		












  

    
      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
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import logging

  		




  4
  4
  
    
import requests

  		




  5
  5
  
    
import threading

  		




  
  6
  
    
import os

  		




  6
  7
  
    
import urlparse

  		




  7
  8
  
    

  		




  8
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from django.conf import settings

  		




  9
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from django.core.cache import cache

  		




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from django.template import Template

  		




  11
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  12
  
  
    
def template_vars(request):

  		




  13
  
  
    
    return getattr(settings, 'TEMPLATE_VARS', {})

  		




  
  13
  
    
from hobo.scrutiny.wsgi.middleware import VersionMiddleware

  		




  14
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  15
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logger = logging.getLogger('hobo')

  		




  16
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CACHE_REFRESH_TIMEOUT = 300

  		




  
  18
  
    
VERSIONS = VersionMiddleware.get_packages_version()

  		




  
  19
  
    

  		




  
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  21
  
    
def template_vars(request):

  		




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

  		




  
  23
  
    
    try:

  		




  
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        counter_filename = getattr(settings, 'STATICS_HASH_COUNTER', None)

  		




  
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        if counter_filename:

  		




  
  26
  
    
            statics_hash.update(str(os.stat(counter_filename).st_atime))

  		




  
  27
  
    
    except OSError:

  		




  
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        pass

  		




  
  29
  
    
    template_vars = getattr(settings, 'TEMPLATE_VARS', {})

  		




  
  30
  
    
    template_vars.update({'statics_hash': statics_hash.hexdigest()})

  		




  
  31
  
    
    return template_vars

  		




  18
  32
  
    

  		




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class RemoteTemplate(object):

  		




  20
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    def __init__(self, source):

  		




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