Description of problem:
radicale's listing multiple calendars under a single user doesn't work
when radicale runs using apache for configuration,
IF radicale is not at the root of a virtual server.
(e.g., if it is at www.example.com/caldav/ instead of
caldav.example.com/).

Version-Release number of selected component (if applicable):
radicale-0.8-10.fc20.noarch


How reproducible:
every time

Steps to Reproduce:
1. set up radicale under a sub direcotry
2.giving www.example.com/caldav/user/
to acal (on android) checks out as caldav,
but it doesn't list any sub-calendars,
even if
www.example.com/caldav/user/foo.ics/
and
www.example.com/caldav/user/bar.ics/
exist.


Actual results:
see above

Expected results:
In acal, "list calendars" should find foo.ics and bar.ics.


Additional info:
why? apache strips off the /caldav/ base prefix.
Radicale then returns entries with short href's
(/user/, /user/foo.ics/, /user/bar.ics/)
in response to the PROPFIND Depth: 1 query during discovery.

But these hrefs are wrong... they're missing /caldav/.

One might think fixing this by putting 
base_prefix=/caldav/
in /etc/radicale/config 
would do the trick, but no:
because Apache strips that off, this config fails
the check "Path not starting with prefix"
in radicale.init.

Suggested fix:

add a new config parameter:
can_skip_base_prefix
that avoids this check. It all then works, provided this goes in the
config:
base_prefix=/caldav/
can_skip_base_prefix=True

Patch:

--- __init__.py-    2013-07-12 08:45:26.000000000 -0700
+++ __init__.py 2014-04-19 11:10:43.791856360 -0700
@@ -252,6 +252,8 @@
             environ["PATH_INFO"] = self.sanitize_uri(
                 "/%s" % environ["PATH_INFO"][len(base_prefix):])
             log.LOGGER.debug("Sanitized path: %s", environ["PATH_INFO"])
+        elif config.get("server", "can_skip_base_prefix"):
+            log.LOGGER.debug("skipped already sanitized path: %s", environ["PATH_INFO"])
         else:
             # Request path not starting with base_prefix, not allowed
             log.LOGGER.debug(
--- config.py-  2014-04-19 11:01:38.655498852 -0700
+++ config.py   2014-04-19 11:06:04.930683289 -0700
@@ -47,6 +47,7 @@
         "key": "/etc/apache2/ssl/server.key",
         "dns_lookup": "True",
         "base_prefix": "/",
+        "can_skip_base_prefix": "False",
         "realm": "Radicale - Password Required"},
     "encoding": {
         "request": "utf-8",

Th
is fix addresses two issues on
http://radicale.org/user_documentation/#idapache-and-mod-wsgi

the statement: "The [server] part of the configuration is ignored."
is not true. Giving a base_prefix is enforced.

The statement "You should use the root of the (sub)domain
(WSGIScriptAlias /), else some CalDAV features may not work." is true
and is the limitation I hit.
With the patch, this statement should change to :
"If you have a non-empty base_prefix, then you MUST set
"can_skip_base_prefix=True" in your config or some CalDAV features
(like discovering calendars) will not work.

This patch was accepted upstream, see https://github.com/Kozea/Radicale/issues/147

However, the update radicale-0.8-10.fc20.noarch broke my copy patched by hand.
It's unclear when upstream will do a release, so if the maintainer is interested,
they may wish to apply this patch to fedora as well until the 0.9 release.

Thanks.