# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1340576412 -7200
# Node ID 5fe139a6aeb1ac11ebe97dab903feadf2f2f8983
# Parent  635de7896589517cde6aa320a742d4bbaa27d298
Added usage of the content preferences support from MoinSupport.

diff -r 635de7896589 -r 5fe139a6aeb1 actions/SharedUpdates.py
--- a/actions/SharedUpdates.py	Sun Jun 24 21:57:23 2012 +0200
+++ b/actions/SharedUpdates.py	Mon Jun 25 00:20:12 2012 +0200
@@ -99,11 +99,13 @@
     headers = ["Content-Type: application/atom+xml; charset=%s" % config.charset]
 
     # Define the last modified time.
-    # NOTE: We could get edits since a certain time and only process those.
+    # NOTE: We could attempt to get the last edit time of the fragment.
 
     page = Page(request, pagename)
     metadata = getMetadata(page)
 
+    # NOTE: Consider using request.httpDate.
+
     if metadata.has_key("last-modified"):
         latest_timestamp = metadata["last-modified"]
         headers.append("Last-Modified: %s" % latest_timestamp.as_HTTP_datetime_string())
@@ -160,12 +162,16 @@
         else:
             mimetypes = ["text/html"]
 
-        # NOTE: Perform content negotiation, obtaining mimetypes common to the
-        # NOTE: fragment and the client.
+        # Perform content negotiation, obtaining mimetypes common to the
+        # fragment and the client.
+
+        accept = getHeader(request, "Accept", "HTTP")
+        prefs = getContentPreferences(accept)
+        preferred = prefs.get_preferred_types(mimetypes)
 
         download_links = []
 
-        for mimetype in mimetypes:
+        for mimetype in preferred:
             specific_link = "%s&mimetype=%s" % (fragment_link, mimetype)
 
             download_links.append('<link rel="alternate" type="%s" href="%s"/>' % (