Changes between Initial Version and Version 1 of JSONRPCServerMiddleware

Timestamp:

Dec 7, 2008, 4:54:10 AM (17 years ago)

Author:

alx3

Comment:

first draft

JSONRPCServerMiddleware

@@ +1 @@
+= Django and AJAX =
+This middleware is another attemp to simplify using AJAX with Dajngo based on JSON-RPC specification (http://json-rpc.org/). It inspired by Java Struts2 JSON-plugin by Musachy Barroso (http://cwiki.apache.org/S2PLUGINS/json-plugin.html) and
+SimpleJSONRPCServer by David McNab (http://code.djangoproject.com/wiki/JSON-RPC).
+= Basic configuration =
+ * jsonrpcserver.py must be on your PYTHONPATH.
+ * Put class 'jsonrpcserver.JSONRPCServerMiddleware' to Django middleware list in settings.py:
+{{{
+#!python
+MIDDLEWARE_CLASSES = (
+    'django.middleware.common.CommonMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.middleware.transaction.TransactionMiddleware',
+    "jsonrpcserver.JSONRPCServerMiddleware",
+)
+
+}}}
+ * Add 'jsonrpc_urlpatterns' to 'urls.py' with 'urlpatterns' syntax:
+{{{
+#!python
+from django.conf.urls.defaults import *
+
+urlpatterns = patterns('',
+#standard django url configuration here
+#...
+)
+
+jsonrpc_urlpatterns = patterns('',
+    (r'^myapp/json_rpc_service/$', 'myapp.newapp.json_rpc_views'),
+    (r'^myapp/json_rpc_geoservice/$', 'myapp.geo.views'),
+)
+}}}
+note: 'myapp.newapp.json_rpc_views' IS NOT A FUNCTION, BUT A MODULE, that contains exposed JSON-RPC functions.
+= Optional Django settings =
+ * JSONRPC_URLPATTERNS_NAME:
+    Default value: 'jsonrpc_urlpatterns'.
+    Name of the variable in 'urls.py',that contains JSON-RPC URL patterns.
+    URL pattern must have Django syntax, but they must contain 
+    MODULES NAMES, NOT FUNCTION NAMES as second element in tuple for patterns function.
+ * JSONRPC_SERIALIZER:
+    Default value: JSONSerializer class - thin wrapper over django.utils.simplejson.
+    Name of the JSON serializer class, that must have methods 'serialize' and 'deserialize'
+ * JSONRPC_JSONFY_AT_ALL_COSTS:
+    Default value: False.
+    Boolean flag, that determines whether JSON encoder should throwing an error or
+    returning a str() representation of unsupportable python object.
+    See implementation of AugmentedJSONEncoder class.
+= Usage =
+ * Write exposed function im module, listed in jsonrpc_urlpatterns:
+{{{
+#!python
+from jsonrpcserver import jsonrpc_function
+@jsonrpc_function
+def my_python_method(par1, par2):
+    return par1 + par2
+    ...
+}}}
+ * use from JS client (e.g. dojo):
+{{{
+#!python
+var  service = new dojo.rpc.JsonService({
+    "serviceType": "JSON-RPC", 
+    "serviceURL": "/myapp/json_rpc_service/"
+});
+service.callRemote("my_python_method", ["string1", "string2"])
+    .addCallback(...);
+}}}
+= Example =
+See example here: http://alx3apps.appspot.com/jsonrpc_example/.
+= Other =
+Written by alx3 (alx3apps(at)gmail(dot)com).
+You can use this code under the terms of BSD licence (like Django project).
+