Switch client to JSON-RPC

Modify ipalib.rpc to support JSON-RPC in addition to XML-RPC.
This is done by subclassing and extending xmlrpclib, because
our existing code relies on xmlrpclib internals.

The URI to use is given in the new jsonrpc_uri env variable. When
it is not given, it is generated from xmlrpc_uri by replacing
/xml with /json.

The rpc_json_uri env variable existed before, but was unused,
undocumented and not set the install scripts.
This patch removes it in favor of jsonrpc_uri (for consistency
with xmlrpc_uri).

Add the rpc_protocol env variable to control the protocol
IPA uses. rpc_protocol defaults to 'jsonrpc', but may be changed
to 'xmlrpc'.
Make backend.Executioner and tests use the backend specified by
rpc_protocol.

For compatibility with unwrap_xml, decoding JSON now gives tuples
instead of lists.

Design: http://freeipa.org/page/V3/JSON-RPC
Ticket: https://fedorahosted.org/freeipa/ticket/3299

1 files changed, 5 insertions, 2 deletions

diff --git a/ipalib/constants.py b/ipalib/constants.py
index 79885a33a..5f9f03a4a 100644
--- a/ipalib/constants.py
+++ b/ipalib/constants.py
@@ -111,10 +111,12 @@ DEFAULT_CONFIG = (
     ('container_otp', DN(('cn', 'otp'))),
 
     # Ports, hosts, and URIs:
-    # FIXME: let's renamed xmlrpc_uri to rpc_xml_uri
     ('xmlrpc_uri', 'http://localhost:8888/ipa/xml'),
-    ('rpc_json_uri', 'http://localhost:8888/ipa/json'),
+    # jsonrpc_uri is set in Env._finalize_core()
     ('ldap_uri', 'ldap://localhost:389'),
+
+    ('rpc_protocol', 'jsonrpc'),
+
     # Time to wait for a service to start, in seconds
     ('startup_timeout', 120),
 
@@ -199,5 +201,6 @@ DEFAULT_CONFIG = (
     ('in_server', object),  # Whether or not running in-server (bool)
     ('logdir', object),  # Directory containing log files
     ('log', object),  # Path to context specific log file
+    ('jsonrpc_uri', object),  # derived from xmlrpc_uri in Env._finalize_core()
 
 )