1 import gluon.contrib.simplejson as simplejson

     2 import types

     3 import sys

     4 

     5 class JSONRPCServiceBase:

     6 

     7     def __init__(self):

     8         self.methods={}

     9 

    10     def response(self, id, result):

    11         return simplejson.dumps({'version': '1.1', 'id':id,

    12                                  'result':result, 'error':None})

    13     def error(self, id, code, message):

    14         return simplejson.dumps({'id': id,

    15                                  'version': '1.1',

    16                                  'error': {'name': 'JSONRPCError',

    17                                            'code': code,

    18                                            'message': message

    19                                            }

    20                                      })

    21 

    22     def add_method(self, name, method):

    23         self.methods[name] = method

    24 

    25     def process(self, data):

    26         data = simplejson.loads(data)

    27         id, method, params = data["id"], data["method"], data["params"]

    28         if method in self.methods:

    29             try:

    30                 result =self.methods[method](*params)

    31                 return self.response(id, result)

    32             except BaseException:

    33                 etype, eval, etb = sys.exc_info()

    34                 return self.error(id, 100, '%s: %s' %(etype.__name__, eval))

    35             except:

    36                 etype, eval, etb = sys.exc_info()

    37                 return self.error(id, 100, 'Exception %s: %s' %(etype, eval))

    38         else:

    39             return self.error(id, 100, 'method "%s" does not exist' % method)

    40 

    41     def listmethods(self):

    42         return self.methods.keys() 

    43