[Zope-Checkins] CVS: Zope2 - Resource.py:1.42.12.1

[Martijn Pieters]

Update of /cvs-repository/Zope2/lib/python/webdav
In directory korak:/tmp/cvs-serv31242/webdav

Modified Files:
      Tag: mj-http_range_support-branch
	Resource.py 
Log Message:
- Move HTTP Range methods to own module.

- Create a HTTPRangeInterface flag interface so we can test for support.

- Have WebDAV enabled objects set 'Accept-Ranges: bytes' for supporting
  objects and 'Accept-Ranges: none' for the rest.

- Add ETag support to If-Range (ETags were already generated for Image and
  File objects, just not updated when the contents of the resource changed).

- Removed some unused imports.



--- Updated File Resource.py in package Zope2 --
--- Resource.py	2001/03/27 19:52:11	1.42
+++ Resource.py	2001/04/23 14:28:28	1.42.12.1
@@ -94,6 +94,7 @@
 from AccessControl import getSecurityManager
 from WriteLockInterface import WriteLockInterface
 import Globals, time
+from ZPublisher.HTTPRangeSupport import HTTPRangeInterface
 
 class Resource(ExtensionClass.Base, Lockable.LockableItem):
     """The Resource mixin class provides basic WebDAV support for
@@ -130,6 +131,12 @@
             response.setHeader('Connection', 'close')
             response.setHeader('Date', rfc1123_date(), 1)
         response.setHeader('MS-Author-Via', 'DAV')
+
+        # HTTP Range support
+        if HTTPRangeInterface.isImplementedBy(self):
+            response.setHeader('Accept-Ranges', 'bytes')
+        else:
+            response.setHeader('Accept-Ranges', 'none')
 
     def dav__validate(self, object, methodname, REQUEST):
         msg='<strong>You are not authorized to access this resource.</strong>'