Source Code for Module ZenWidgets.FileGzipper'

 1  ########################################################################### 
 2  # 
 3  # This program is part of Zenoss Core, an open source monitoring platform. 
 4  # Copyright (C) 2007, Zenoss Inc. 
 5  # 
 6  # This program is free software; you can redistribute it and/or modify it 
 7  # under the terms of the GNU General Public License version 2 as published by 
 8  # the Free Software Foundation. 
 9  # 
10  # For complete information please visit: http://www.zenoss.com/oss/ 
11  # 
12  ########################################################################### 
13   
14  """ FileGzipper 
15   
16  A monkey patch that enables gzip compression on static files 
17   
18  """ 
19   
20  from Products.CMFCore.utils import _setCacheHeaders, _ViewEmulator 
21  from DateTime import DateTime 
22  from webdav.common import rfc1123_date 
23  from Products.CMFCore.FSFile import FSFile 
24  from Products.CMFCore.FSImage import FSImage 
25 -def index_html(self, REQUEST, RESPONSE): 
26      """ Modified default view for files to enable 
27          gzip compression on js and css files. 
28      """ 
29      self._updateFromFS() 
30      if hasattr(self, '_data'): 
31          data = self._data 
32      else: 
33          data = self._readFile(0) 
34      data_len = len(data) 
35      last_mod = self._file_mod_time 
36      status = 200 
37      # HTTP If-Modified-Since header handling. 
38      header=REQUEST.get_header('If-Modified-Since', None) 
39      if header is not None: 
40          header = header.split(';')[0] 
41          try: 
42              mod_since=long(DateTime(header).timeTime()) 
43          except: 
44              mod_since=None 
45               
46          if mod_since is not None: 
47              if last_mod > 0 and last_mod <= mod_since: 
48                  status = 304 
49                  data = '' 
50      now = DateTime() 
51      later = now + 30 
52      RESPONSE.setStatus(status) 
53      RESPONSE.setHeader('Last-Modified', rfc1123_date(last_mod)) 
54      RESPONSE.setHeader('Content-Type', self.content_type) 
55      RESPONSE.setHeader('Cache-Control', 'public,max-age=%d' % int(3600*24*30)) 
56      RESPONSE.setHeader('Expires', later.rfc822()) 
57   
58      # The key line! 
59      RESPONSE.enableHTTPCompression(force=1) 
60   
61      if status != 304: 
62          RESPONSE.setHeader('Content-Length', data_len) 
63      if self.ZCacheable_getManager() is not None: 
64          self.ZCacheable_set(None) 
65      else: 
66          _setCacheHeaders(_ViewEmulator().__of__(self), extra_context={}) 
67      return data 
68   
69  FSFile.index_html = index_html 
70  FSImage.index_html = index_html 
71