def _get_ip_addr(self, environ):

        return _get_ip_addr(environ)

    def _get_method_args(self):

        """

        Return `self._rpc_args` to dispatched controller method

        chosen by __call__

        """

        return self._rpc_args

    def __call__(self, environ, start_response):

        """

        Parse the request body as JSON, look up the method on the

        controller and if it exists, dispatch to it.

        """

        start = time.time()

        ip_addr = self.ip_addr = self._get_ip_addr(environ)

        self._req_id = None

        if 'CONTENT_LENGTH' not in environ:

            log.debug("No Content-Length")

            return jsonrpc_error(retid=self._req_id,

                                 message="No Content-Length in request")

        else:

            length = environ['CONTENT_LENGTH'] or 0

            length = int(environ['CONTENT_LENGTH'])

            log.debug('Content-Length: %s' % length)

        if length == 0:

            log.debug("Content-Length is 0")

            return jsonrpc_error(retid=self._req_id,

                                 message="Content-Length is 0")

        raw_body = environ['wsgi.input'].read(length)

        try:

            json_body = json.loads(urllib.unquote_plus(raw_body))

        except ValueError, e:

            # catch JSON errors Here

            return jsonrpc_error(retid=self._req_id,

                                 message="JSON parse error ERR:%s RAW:%r" \

                                 % (e, urllib.unquote_plus(raw_body)))

        # check AUTH based on API KEY

        try:

            self._req_api_key = json_body['api_key']

            self._req_id = json_body['id']

            self._req_method = json_body['method']

            self._request_params = json_body['args']

            log.debug(

                'method: %s, params: %s' % (self._req_method,

                                            self._request_params)

            )

        except KeyError, e:

            return jsonrpc_error(retid=self._req_id,

                                 message='Incorrect JSON query missing %s' % e)

        # check if we can find this session using api_key

        try:

            u = User.get_by_api_key(self._req_api_key)

            if u is None:

                return jsonrpc_error(retid=self._req_id,

                                     message='Invalid API KEY')

            #check if we are allowed to use this IP

            auth_u = AuthUser(u.user_id, self._req_api_key, ip_addr=ip_addr)

            if not auth_u.ip_allowed:

                return jsonrpc_error(retid=self._req_id,

                        message='request from IP:%s not allowed' % (ip_addr))

            else:

                log.info('Access for IP:%s allowed' % (ip_addr))

        except Exception, e:

            return jsonrpc_error(retid=self._req_id,

                                 message='Invalid API KEY')

        self._error = None

        try:

            self._func = self._find_method()

        except AttributeError, e:

            return jsonrpc_error(retid=self._req_id,

                                 message=str(e))

        # now that we have a method, add self._req_params to

        # self.kargs and dispatch control to WGIController

        argspec = inspect.getargspec(self._func)

        arglist = argspec[0][1:]

        defaults = map(type, argspec[3] or [])

        default_empty = types.NotImplementedType

        # kw arguments required by this method

        func_kwargs = dict(izip_longest(reversed(arglist), reversed(defaults),

                                        fillvalue=default_empty))

        # this is little trick to inject logged in user for

        # perms decorators to work they expect the controller class to have

        # rhodecode_user attribute set

        self.rhodecode_user = auth_u

        # This attribute will need to be first param of a method that uses

        # api_key, which is translated to instance of user at that name

        USER_SESSION_ATTR = 'apiuser'

        if USER_SESSION_ATTR not in arglist:

            return jsonrpc_error(

                retid=self._req_id,

                message='This method [%s] does not support '

                         'authentication (missing %s param)' % (

                                    self._func.__name__, USER_SESSION_ATTR)

            )

        # get our arglist and check if we provided them as args

        for arg, default in func_kwargs.iteritems():

            if arg == USER_SESSION_ATTR:

                # USER_SESSION_ATTR is something translated from api key and

                # this is checked before so we don't need validate it

                continue

            # skip the required param check if it's default value is

            # NotImplementedType (default_empty)

            if (default == default_empty and arg not in self._request_params):

                return jsonrpc_error(

                    retid=self._req_id,

                    message=(

                        'Missing non optional `%s` arg in JSON DATA' % arg

                    )

                )

        self._rpc_args = {USER_SESSION_ATTR: u}

        self._rpc_args.update(self._request_params)

        self._rpc_args['action'] = self._req_method

        self._rpc_args['environ'] = environ

        self._rpc_args['start_response'] = start_response

        status = []

        headers = []

        exc_info = []

        def change_content(new_status, new_headers, new_exc_info=None):

            status.append(new_status)

            headers.extend(new_headers)

            exc_info.append(new_exc_info)

        output = WSGIController.__call__(self, environ, change_content)

        output = list(output)

        headers.append(('Content-Length', str(len(output[0]))))

        replace_header(headers, 'Content-Type', 'application/json')

        start_response(status[0], headers, exc_info[0])

        log.info('IP: %s Request to %s time: %.3fs' % (

            _get_ip_addr(environ),

            safe_unicode(_get_access_path(environ)), time.time() - start)

        )

        return output

    def _dispatch_call(self):

        """

        Implement dispatch interface specified by WSGIController

        """

        try:

            raw_response = self._inspect_call(self._func)

            if isinstance(raw_response, HTTPError):

                self._error = str(raw_response)

        except JSONRPCError, e:

            self._error = str(e)

        except Exception, e:

            log.error('Encountered unhandled exception: %s' \

                      % traceback.format_exc())

            json_exc = JSONRPCError('Internal server error')

            self._error = str(json_exc)

        if self._error is not None:

            raw_response = None

        response = dict(id=self._req_id, result=raw_response,

                        error=self._error)

    def setUp(self):

        self.maxDiff = None

        make_users_group()

    def tearDown(self):

        destroy_users_group()

    def _compare_ok(self, id_, expected, given):

        expected = jsonify({

            'id': id_,

            'error': None,

            'result': expected

        })

        given = json.loads(given)

        self.assertEqual(expected, given)

    def _compare_error(self, id_, expected, given):

        expected = jsonify({

            'id': id_,

            'error': expected,

            'result': None

        })

        given = json.loads(given)

        self.assertEqual(expected, given)

#    def test_Optional(self):

#        from rhodecode.controllers.api.api import Optional

#        option1 = Optional(None)

#        self.assertEqual('<Optional:%s>' % None, repr(option1))

#

#        self.assertEqual(1, Optional.extract(Optional(1)))

#        self.assertEqual('trololo', Optional.extract('trololo'))

    def test_api_wrong_key(self):

        id_, params = _build_data('trololo', 'get_user')

        response = api_call(self, params)

        expected = 'Invalid API KEY'

        self._compare_error(id_, expected, given=response.body)

    def test_api_missing_non_optional_param(self):

        id_, params = _build_data(self.apikey, 'get_repo')

        response = api_call(self, params)

        expected = 'Missing non optional `repoid` arg in JSON DATA'

        self._compare_error(id_, expected, given=response.body)

    def test_api_get_users(self):

        id_, params = _build_data(self.apikey, 'get_users',)

        response = api_call(self, params)

        ret_all = []

        for usr in UserModel().get_all():

            ret = usr.get_api_data()

            ret_all.append(jsonify(ret))

        expected = ret_all

        self._compare_ok(id_, expected, given=response.body)

    def test_api_get_user(self):

        id_, params = _build_data(self.apikey, 'get_user',

                                  userid=TEST_USER_ADMIN_LOGIN)

        response = api_call(self, params)

        usr = UserModel().get_by_username(TEST_USER_ADMIN_LOGIN)

        ret = usr.get_api_data()

        ret['permissions'] = AuthUser(usr.user_id).permissions

        expected = ret

        self._compare_ok(id_, expected, given=response.body)

    def test_api_get_user_that_does_not_exist(self):

        id_, params = _build_data(self.apikey, 'get_user',

                                  userid='trololo')

        response = api_call(self, params)

        expected = "user `%s` does not exist" % 'trololo'

        self._compare_error(id_, expected, given=response.body)

    def test_api_get_user_without_giving_userid(self):

        id_, params = _build_data(self.apikey, 'get_user')

        response = api_call(self, params)

        usr = UserModel().get_by_username(TEST_USER_ADMIN_LOGIN)

        ret = usr.get_api_data()

        ret['permissions'] = AuthUser(usr.user_id).permissions

        expected = ret

        self._compare_ok(id_, expected, given=response.body)

    def test_api_get_user_without_giving_userid_non_admin(self):

        id_, params = _build_data(self.apikey_regular, 'get_user')

        response = api_call(self, params)

        usr = UserModel().get_by_username(self.TEST_USER_LOGIN)

        ret = usr.get_api_data()

        ret['permissions'] = AuthUser(usr.user_id).permissions