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git://projects.qi-hardware.com/openwrt-packages.git
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113 lines
3.2 KiB
Python
113 lines
3.2 KiB
Python
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"""
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Copyright (c) 2007 Jan-Klaas Kollhof
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This file is part of jsonrpc.
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jsonrpc is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This software is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this software; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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from jsonrpc import loads, dumps, JSONEncodeException
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def ServiceMethod(fn):
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fn.IsServiceMethod = True
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return fn
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class ServiceException(Exception):
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pass
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class ServiceRequestNotTranslatable(ServiceException):
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pass
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class BadServiceRequest(ServiceException):
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pass
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class ServiceMethodNotFound(ServiceException):
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def __init__(self, name):
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self.methodName=name
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class ServiceHandler(object):
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def __init__(self, service):
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self.service=service
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def handleRequest(self, json):
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err=None
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result = None
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id_=''
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try:
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req = self.translateRequest(json)
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except ServiceRequestNotTranslatable, e:
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err = e
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req={'id':id_}
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if err==None:
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try:
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id_ = req['id']
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methName = req['method']
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args = req['params']
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except:
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err = BadServiceRequest(json)
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if err == None:
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try:
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meth = self.findServiceEndpoint(methName)
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except Exception, e:
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err = e
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if err == None:
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try:
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result = self.invokeServiceEndpoint(meth, args)
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except Exception, e:
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err = e
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resultdata = self.translateResult(result, err, id_)
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return resultdata
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def translateRequest(self, data):
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try:
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req = loads(data)
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except:
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raise ServiceRequestNotTranslatable(data)
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return req
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def findServiceEndpoint(self, name):
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try:
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meth = getattr(self.service, name)
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if getattr(meth, "IsServiceMethod"):
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return meth
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else:
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raise ServiceMethodNotFound(name)
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except AttributeError:
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raise ServiceMethodNotFound(name)
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def invokeServiceEndpoint(self, meth, args):
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return meth(*args)
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def translateResult(self, rslt, err, id_):
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if err != None:
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err = {"name": err.__class__.__name__, "message":err.message}
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rslt = None
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try:
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data = dumps({"result":rslt,"id":id_,"error":err})
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except JSONEncodeException, e:
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err = {"name": "JSONEncodeException", "message":"Result Object Not Serializable"}
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data = dumps({"result":None, "id":id_,"error":err})
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return data |