c11bca3c37
put encoders and framers into their own files. also rework messages and dispatcher make tcpserver functional FIRST WORKING VERSION! (no daemon mode yet, sorry) start bin/server.py, connect a terminal to localhost:10767 and press enter.... note: not all requests are bug free yet, ListDevicesRequest() works Change-Id: I46d6e469bca32fc53057d64ff48cce4f41ea12ea
123 lines
4.3 KiB
Python
123 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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# *****************************************************************************
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
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#
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# *****************************************************************************
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"""Define validators."""
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# a Validator returns a validated object or raises an ValueError
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# easy python validators: int(), float(), str()
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# also validators should have a __repr__ returning a 'python' string
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# which recreates them
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class Validator(object):
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# list of tuples: (name, converter)
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params = []
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valuetype = float
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def __init__(self, *args, **kwds):
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plist = self.params[:]
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if len(args) > len(plist):
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raise ProgrammingError('%s takes %d parameters only (%d given)' % (
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self.__class__.__name__,
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len(plist), len(args)))
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for pval in args:
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pname, pconv = plist.pop(0)
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if pname in kwds:
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raise ProgrammingError('%s: positional parameter %s als given '
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'as keyword!' % (
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self.__class__.__name__,
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pname))
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self.__dict__[pname] = pconv(pval)
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for pname, pconv in plist:
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if pname in kwds:
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pval = kwds.pop(pname)
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self.__dict__[pname] = pconv(pval)
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else:
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raise ProgrammingError('%s: param %s left unspecified!' % (
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self.__class__.__name__,
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pname))
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if kwds:
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raise ProgrammingError('%s got unknown arguments: %s' % (
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self.__class__.__name__,
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', '.join(list(kwds.keys()))))
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def __repr__(self):
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params = ['%s=%r' % (pn, self.__dict__[pn]) for pn in self.params]
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return ('%s(%s)' % (self.__class__.__name__, ', '.join(params)))
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def __call__(self, value):
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return self.check(self.valuetype(value))
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class floatrange(Validator):
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params = [('lower', float), ('upper', float)]
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def check(self, value):
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if self.lower <= value <= self.upper:
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return value
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raise ValueError('Floatrange: value %r must be within %f and %f' %
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(value, self.lower, self.upper))
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class positive(Validator):
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def check(self, value):
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if value > 0:
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return value
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raise ValueError('Value %r must be positive!' % obj)
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class nonnegative(Validator):
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def check(self, value):
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if value >= 0:
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return value
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raise ValueError('Value %r must be positive!' % obj)
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# more complicated validator may not be able to use validator base class
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class mapping(object):
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def __init__(self, *args, **kwds):
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self.mapping = {}
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# use given kwds directly
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self.mapping.update(kwds)
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# enumerate args
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i = -1
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args = list(args)
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while args:
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i += 1
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if i in self.mapping:
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continue
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self.mapping[args.pop(0)] = i
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# generate reverse mapping too for use by protocol
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self.revmapping = {}
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for k, v in self.mapping.items():
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self.revmapping[v] = k
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def __call__(self, obj):
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if obj in self.mapping:
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return obj
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raise ValueError("%r should be one of %r" %
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(obj, list(self.mapping.keys())))
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def __repr__(self):
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params = ['%s=%r' % (mname, mval) for mname, mval in self.mapping]
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return ('%s(%s)' % (self.__class__.__name__, ', '.join(params)))
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