svgui/pyjs/jsonrpc/jsonrpc.py
author Edouard Tisserant
Tue, 09 Apr 2019 13:05:35 +0200
changeset 2583 e172ab28d04e
parent 1881 091005ec69c4
permissions -rw-r--r--
Continue fixing deadlock of previous commit, this time occuring when waiting for 'cleanup' python runtime call to finish. Now 'init' and 'cleanup' python runtime calls are called directly from main thread, and aren't anymore invoked in the context of wxMainloop and/or twisted reactor.
from __future__ import absolute_import
import sys
import gluon.contrib.simplejson as simplejson


class JSONRPCServiceBase(object):

    def __init__(self):
        self.methods = {}

    def response(self, id, result):
        return simplejson.dumps({'version': '1.1', 'id': id,
                                 'result': result, 'error': None})

    def error(self, id, code, message):
        return simplejson.dumps({
            'id': id,
            'version': '1.1',
            'error': {'name': 'JSONRPCError',
                      'code': code,
                      'message': message}
        })

    def add_method(self, name, method):
        self.methods[name] = method

    def process(self, data):
        data = simplejson.loads(data)
        id, method, params = data["id"], data["method"], data["params"]
        if method in self.methods:
            try:
                result = self.methods[method](*params)
                return self.response(id, result)
            except Exception:
                etype, eval, _etb = sys.exc_info()
                return self.error(id, 100, 'Exception %s: %s' % (etype, eval))
            except BaseException:
                etype, eval, _etb = sys.exc_info()
                return self.error(id, 100, '%s: %s' % (etype.__name__, eval))
        else:
            return self.error(id, 100, 'method "%s" does not exist' % method)

    def listmethods(self):
        return self.methods.keys()