plistservice.py

#!/usr/bin/python
# coding: utf-8

# Copyright (c) 2013 Mountainstorm
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


from MobileDevice import *
import os
import struct


class PlistService(object):
    def __init__(
            self,
            amdevice,
            servicenames,
            format=kCFPropertyListBinaryFormat_v1_0,
            bigendian=False
        ):
        self.bigendian = bigendian
        self.format = format
        self.s = None
        self.dev = amdevice
        self.format = format
        for name in servicenames:
            self.s = amdevice.start_service(name)
            if self.s is not None:
                break

        if self.s is None:
            raise RuntimeError(u'Unable to launch one of:', servicenames)

    def disconnect(self):
        os.close(self.s)

    def _sendmsg(self, msg):
        endian = u'>I'
        if self.bigendian:
            endian = u'<I'
        data = dict_to_plist_encoding(msg, self.format)
        os.write(self.s, struct.pack(endian.encode(u'utf-8'), len(data)))
        os.write(self.s, data)


    def _recvmsg(self):
        retval = None
        endian = u'>I'
        if self.bigendian:
            endian = u'<I'
        length = os.read(self.s, 4)
        if length is not None and len(length) == 4:
            l = struct.unpack(endian.encode(u'utf-8'), length)[0]
            reply = ''
            left = l
            while left > 0:
                r = os.read(self.s, left)
                if r is None:
                    raise RuntimeError(u'Unable to read reply')
                reply += r
                left -= len(r)
            retval = dict_from_plist_encoding(reply, self.format)
        return retval