How can I debug txJSON-Rpc calls using a javascript client and Python server?
سؤال
I have implemented a wxPython app, that also has a Twisted txJSONrpc server in it. This is my RPC "server"; I can call it using a TCP socket and issue commands.
There is a Python test script called client_subhandled.py in txjsonrpc that I used to test, and it calls and receives an answer from the RPC server, so Python client/server communication works.
However, I need to make JSON RPC calls from javascript, not from Python. To do that I have used a small java applet that allows you to open a TCP socket from javascript and read and write to/from it (java_socket_bridge.js). This also works, I have tested it not using the JSON RPC protocol, but sending and receiving plain text using a simple twisted echo protocol.
The problem is that using javascript as a client, I can't seem to get rpc JSON calls to work. Is there a way to debug incoming JSON rpc calls in txJSONrpc? I would ideally like to see what JSON objects come in in the server to see if they're compliant.
Thanks!
from twisted.internet import wxreactor # socket library
wxreactor.install() # for using twisted along with wxPython
# using netstring TCP protocol
from txjsonrpc.netstring import jsonrpc
from twisted.web import server
# import twisted reactor *only after* installing wxreactor
from twisted.internet import reactor
myreactor = reactor
def register(application):
# initialise and run the TWISTED reactor
reactor.registerWxApp(application)
#rpcCom.myreactor.listenTCP(9000, rpcCom.EchoServerFactory())
reactor.listenTCP(9000, factory)
reactor.run()
class Example(jsonrpc.JSONRPC):
"""An example object to be published."""
def jsonrpc_echo(self, x):
"""Return all passed args."""
print "echo called"
return x
class Testing(jsonrpc.JSONRPC):
def jsonrpc_getList(self):
"""Return a list."""
return [1,2,3,4,'a','b','c','d']
class Math(jsonrpc.JSONRPC):
"""
An example object to be published.
"""
def jsonrpc_add(self, a, b):
"""
Return sum of arguments.
"""
return a + b
factory = jsonrpc.RPCFactory(Example)
factory.putSubHandler('math', Math)
factory.putSubHandler('testing', Testing)
factory.addIntrospection()
المحلول
have you tried using Wireshark ?
Be careful, it seems like there are some issues when capturing on localhost ;)