Source Code for Module Products.ZenWidgets.FileGzipper'

 1  ############################################################################## 
 2  #  
 3  # Copyright (C) Zenoss, Inc. 2007, all rights reserved. 
 4  #  
 5  # This content is made available according to terms specified in 
 6  # License.zenoss under the directory where your Zenoss product is installed. 
 7  #  
 8  ############################################################################## 
 9   
10   
11  """ FileGzipper 
12   
13  A monkey patch that enables gzip compression on static files 
14   
15  """ 
16   
17  from Products.CMFCore.utils import _setCacheHeaders, _ViewEmulator 
18  from Products.CMFCore.utils import _checkConditionalGET 
19  from Products.CMFCore.FSFile import FSFile 
20  from Products.CMFCore.FSImage import FSImage 
21 -def index_html(self, REQUEST, RESPONSE): 
22      """ 
23      The default view of the contents of a File or Image. 
24   
25      Returns the contents of the file or image.  Also, sets the 
26      Content-Type HTTP header to the objects content type. 
27      """ 
28      self._updateFromFS() 
29      view = _ViewEmulator().__of__(self) 
30   
31      # If we have a conditional get, set status 304 and return 
32      # no content 
33      if _checkConditionalGET(view, extra_context={}): 
34          return '' 
35   
36      ###### ZENOSS PATCH ##### 
37      # Patch to ensure a static charset 
38      if ";" not in self.content_type: 
39          self.content_type += "; charset=utf-8" 
40      ######################### 
41      RESPONSE.setHeader('Content-Type', self.content_type) 
42   
43   
44      # old-style If-Modified-Since header handling. 
45      if self._setOldCacheHeaders(): 
46          # Make sure the CachingPolicyManager gets a go as well 
47          _setCacheHeaders(view, extra_context={}) 
48          return '' 
49   
50      data = self._readFile(0) 
51      data_len = len(data) 
52      RESPONSE.setHeader('Content-Length', data_len) 
53   
54      ###### ZENOSS PATCH ##### 
55      # Patch to use gzip compression 
56      RESPONSE.enableHTTPCompression(REQUEST) 
57      ######################### 
58   
59      #There are 2 Cache Managers which can be in play.... 
60      #need to decide which to use to determine where the cache headers 
61      #are decided on. 
62      if self.ZCacheable_getManager() is not None: 
63          self.ZCacheable_set(None) 
64      else: 
65          _setCacheHeaders(view, extra_context={}) 
66      return data 
67   
68  FSFile.index_html = index_html 
69  FSImage.index_html = index_html 
70   
71  from zope.browserresource.file import FileResource 
72  from Products.ZenUtils.Utils import monkeypatch 
73  from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile 
74   
75  @monkeypatch(ViewPageTemplateFile) 
76 -def __call__(self, __instance, *args, **keywords): 
77      try: 
78          response = __instance.request.response 
79          response.enableHTTPCompression(REQUEST=__instance.request) 
80      except AttributeError: 
81          pass 
82      return original(self, __instance, *args, **keywords) 
83   
84  oldget = FileResource.GET 
85  @monkeypatch(FileResource) 
86 -def GET(self): 
87      self.request.response.enableHTTPCompression(self.request) 
88      return oldget(self) 
89