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# Copyright 2001 - 2016 Ludek Smid [http://www.ospace.net/] |
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# |
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# This file is part of Outer Space. |
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# |
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# Outer Space is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# Outer Space is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with Outer Space; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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# |
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import types |
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from IDataHolder import IDataHolder |
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import zlib, string |
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__all__ = ('EncodeException', 'DecodeException', 'IPacket', 'IMarshal') |
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class EncodeException(Exception): |
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pass |
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class DecodeException(Exception): |
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pass |
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class IPacket: |
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def __init__(self): |
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self.sid = None |
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self.method = None |
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self.params = None |
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self.result = None |
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self.messages = None |
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self.exception = None |
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self.clientAddr = None |
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def __repr__(self): |
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result = '<%s.%s %d ' % (self.__class__.__module__, self.__class__.__name__, id(self)) |
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for key, value in self.__dict__.items(): |
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result += '%s=%s, ' % (key, repr(value)) |
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result += '>' |
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return result |
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class IMarshal: |
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def __init__(self): |
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pass |
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def encode(self, data, version = "V20"): |
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if version == "V11": |
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return u'V11%s' % string.join(self.__encodeV11(data), '') |
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# Profiling code TODO remove profiling code |
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data = u'V11%s' % self.__encodeV11(data) |
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stats.encBytes += len(data) |
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# TODO remove zlib profiling |
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stats.zipBytes += len(zlib.compress(data)) |
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# End of profiling code |
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return data |
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elif version == "V20": |
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return "V20%s" % zlib.compress(pickle.dumps(data, 1)) |
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else: |
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raise EncodeException("Cannot handle version %s." % version) |
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def __encodeV11(self, data, isKey = 0): |
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t = type(data) |
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if t == types.NoneType: |
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return [u'|N'] |
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elif t == types.IntType: |
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return [u'|I%d' % (data,)] |
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elif t == types.LongType: |
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return [u'|G%d' % (data,)] |
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elif t == types.FloatType: |
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return [u'|F%.2f' % (data,)] |
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elif t == types.StringType: |
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# Profiling code TODO comment this code |
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#if isKey: |
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# global stats |
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# stats.data[data] = stats.data.get(data, 0) + 1 |
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# stats.total += 1 |
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# stats.totalBytes += len(data) |
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# if stats.total % 100 == 0: |
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# saveStats() |
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# if compress.has_key(data): |
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# stats.hits += 1 |
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# stats.savedBytes += len(data) - len(compress[data]) |
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# End of profiling code |
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if compress.has_key(data): |
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return [u'|C%s' % (compress[data])] |
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return [u'|S%s' % (data.replace('\\','\\\\').replace('|', '\\/').replace('\n', '\\n').replace('\r', '\\r'),)] |
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elif t == types.UnicodeType: |
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return [u'|U%s' % (data.replace('\\','\\\\').replace('|', '\\/').replace('\n', '\\n').replace('\r', '\\r'),)] |
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elif t == types.ListType: |
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result = [u'|L'] |
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for item in data: |
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result.extend(self.__encodeV11(item)) |
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result.append(u'|E') |
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return result |
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elif t == types.TupleType: |
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result = [u'|T'] |
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for item in data: |
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result.extend(self.__encodeV11(item)) |
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result.append(u'|E') |
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return result |
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elif t == types.DictType: |
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result = [u'|D'] |
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for item in data.keys(): |
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result.extend(self.__encodeV11(item, 1)) |
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result.extend(self.__encodeV11(data[item])) |
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result.append(u'|E') |
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return result |
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elif t == types.InstanceType: |
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result = [u'|O'] |
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result.extend(self.__encodeV11('%s.%s' % (data.__class__.__module__, data.__class__.__name__), 1)) |
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for item in data.__dict__.keys(): |
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result.extend(self.__encodeV11(item, 1)) |
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result.extend(self.__encodeV11(data.__dict__[item])) |
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result.append(u'|E') |
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return result |
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else: |
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raise EncodeException('Cannot handle ' + repr(t)) |
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def decode(self, str): |
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prefix = str[:3] |
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if prefix == u'V11': |
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self.index = 0 |
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list = str.split('|') |
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self.list = list[1:] |
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data = self.__decodeV11() |
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elif prefix == u'V20': |
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data = pickle.loads(zlib.decompress(str[3:])) |
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else: |
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raise DecodeException('Cannot handle version %s [message: %s]' % (prefix, str)) |
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return data |
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def __decodeV11(self): |
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item = self.list[self.index] |
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self.index += 1 |
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#@print self.index, |
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t = item[0] |
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if t == u'N': |
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#@print 'None' |
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return None |
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if t == u'I': |
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return int(item[1:]) |
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if t == u'G': |
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return long(item[1:]) |
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if t == u'F': |
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return float(item[1:]) |
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elif t == u'S': |
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#@print 'String', item[1:] |
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str = item[1:] |
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i = str.find('\\') |
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index = 0 |
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result = '' |
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View Code Duplication |
while i > -1: |
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#@print str, i, |
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result += str[index:i] |
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index = i + 2 |
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c = str[i + 1] |
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if c == 'n': result += '\n' |
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elif c == 'r': result += '\r' |
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elif c == '/': result += '|' |
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else: result += c |
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#@print repr(result) |
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i = str.find('\\', i + 2) |
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result += str[index:] |
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return result.encode('ascii') |
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elif t == u'U': |
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#@print 'String', item[1:] |
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str = item[1:] |
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i = str.find('\\') |
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index = 0 |
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result = '' |
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View Code Duplication |
while i > -1: |
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#@print str, i, |
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result += str[index:i] |
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index = i + 2 |
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c = str[i + 1] |
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if c == 'n': result += '\n' |
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elif c == 'r': result += '\r' |
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elif c == '/': result += '|' |
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else: result += c |
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#@print repr(result) |
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i = str.find('\\', i + 2) |
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result += str[index:] |
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return result |
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elif t == u'C': |
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return decompress[item[1:]] |
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elif t == u'T': |
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#@print 'Tuple' |
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result = [] |
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while self.list[self.index][0] != 'E': |
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result.append(self.__decodeV11()) |
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self.index += 1 |
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#@print ':=', result |
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return tuple(result) |
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elif t == u'L': |
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#@print 'Tuple' |
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result = [] |
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while self.list[self.index][0] != 'E': |
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result.append(self.__decodeV11()) |
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self.index += 1 |
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#@print ':=', result |
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return result |
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elif t == u'D': |
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#@print 'Dict' |
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result = {} |
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while self.list[self.index][0] != 'E': |
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key = self.__decodeV11() |
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value = self.__decodeV11() |
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result[key] = value |
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self.index += 1 |
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#@print ':=', result |
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return result |
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elif t == u'O': |
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#@print 'Dict' |
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str = self.__decodeV11() |
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if str == 'ige.IMarshal.IPacket': |
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result = IPacket() |
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elif str == 'ige.IDataHolder.IDataHolder': |
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result = IDataHolder() |
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else: |
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DecodeException('Unsupported class %s' % str) |
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while self.list[self.index][0] != 'E': |
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key = self.__decodeV11() |
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value = self.__decodeV11() |
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setattr(result, key ,value) |
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self.index += 1 |
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#@print ':=', result |
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return result |
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else: |
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raise DecodeException('Cannot handle type <%s>' % t) |
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# (de)compress dictionary |
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#try: |
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# from ICompressScheme import compress |
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#except ImportError: |
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compress = {} |
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decompress = {} |
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for key, value in compress.items(): |
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decompress[str(value)] = key |
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# statistics |
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import cPickle as pickle |
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class Stats: |
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def __init__(self): |
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self.data = {} |
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self.total = 0 |
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self.hits = 0 |
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self.totalBytes = 0 |
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self.savedBytes = 0 |
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self.encBytes = 0 |
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self.zipBytes = 0 |
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# load stats TODO remove profiling code |
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# TODO change dir according to config file |
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try: |
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fh = open('var/marshal.stats.data', 'rb') |
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stats = pickle.load(fh) |
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fh.close() |
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except IOError, e: |
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stats = Stats() |
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except EOFError, e: |
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stats = Stats() |
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def saveStats(directory): |
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print 'Saving IMarshal statistics' |
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# stats |
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fh = open(os.path.join(directory, 'marshal.stats.data'), 'wb') |
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pickle.dump(stats, fh, 1) |
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fh.close() |
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# various data |
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keys = [] |
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for key in stats.data.keys(): |
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keys.append((len(key) * stats.data[key],key)) |
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keys.sort() |
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keys.reverse() |
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fstats = open(os.path.join(directory, 'marshal.stats'), 'w') |
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fscheme = open(os.path.join(directory, 'marshal.cscheme'), 'w') |
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fpysrc = open(os.path.join(directory, 'marshal.cscheme.py'), 'w') |
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print >> fpysrc, 'compress = {' |
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print >> fstats, '# Summary' |
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print >> fstats, '# Total strings:', stats.total |
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print >> fstats, '# Compressed strings:', stats.hits |
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print >> fstats, '# Uncompressed strings:', stats.total - stats.hits |
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print >> fstats, '# Ratio:', stats.hits / stats.total * 100L, '%' |
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print >> fstats, '# Uncompressed size:', stats.totalBytes |
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print >> fstats, '# Compressed size:', stats.totalBytes - stats.savedBytes |
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print >> fstats, '# Saved bytes:', stats.savedBytes |
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print >> fstats, '# Ratio:', stats.savedBytes / stats.totalBytes * 100L, '%' |
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print >> fstats, '# Encoded pckt bytes total:', stats.encBytes |
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print >> fstats, '# Encoded pckt bytes total (no compression, est.):', stats.encBytes + stats.savedBytes |
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print >> fstats, '# Ratio:', stats.encBytes / (stats.encBytes + stats.savedBytes) * 100L, '%' |
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print >> fstats, '# Encoded pckt bytes total (zipped):', stats.zipBytes |
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print >> fstats, '# Ratio (to compressed):', stats.zipBytes / stats.encBytes * 100L, '%' |
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print >> fstats, '# Ratio (to uncompressed):', stats.zipBytes / (stats.encBytes + stats.savedBytes)* 100L , '%' |
|
307
|
|
|
print >> fstats, '# total bytes,number of items,string' |
|
308
|
|
|
index = 0 |
|
309
|
|
|
for key in keys: |
|
310
|
|
|
count, name = key |
|
311
|
|
|
print >> fstats, '%d,%d,%s' % (count, stats.data[name], name) |
|
312
|
|
|
code = makeCode(index) |
|
313
|
|
|
# include in scheme when there is save in bytes |
|
314
|
|
|
if len(code) < len(name): |
|
315
|
|
|
print >> fscheme, code, name |
|
316
|
|
|
print >> fpysrc, " '%s' : '%s'," % (name, code) |
|
317
|
|
|
index += 1 |
|
318
|
|
|
print >>fpysrc, '}' |
|
319
|
|
|
fstats.close() |
|
320
|
|
|
fscheme.close() |
|
321
|
|
|
fpysrc.close() |
|
322
|
|
|
|
|
323
|
|
|
codeChars = '0123456789abcdefghjiklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' |
|
324
|
|
|
|
|
325
|
|
|
def makeCode(index): |
|
326
|
|
|
if index < len(codeChars): |
|
327
|
|
|
return codeChars[index] |
|
328
|
|
|
elif index / len(codeChars) - 1 < len(codeChars): |
|
329
|
|
|
return '%s%s' % ( |
|
330
|
|
|
codeChars[index / len(codeChars) - 1], |
|
331
|
|
|
codeChars[index % len(codeChars)] |
|
332
|
|
|
) |
|
333
|
|
|
else: |
|
334
|
|
|
return None |
|
335
|
|
|
|
|
336
|
|
|
# testing only |
|
337
|
|
|
if __name__ == '__main__': |
|
338
|
|
|
|
|
339
|
|
|
packet = IPacket() |
|
340
|
|
|
packet.sid = '0123456789' |
|
341
|
|
|
packet.method = 'test' |
|
342
|
|
|
packet.params = { 'name':u'Corvus', 'componentOf':1001, 'rules':[1,2], 'isA': (1,2) } |
|
343
|
|
|
marshal = IMarshal() |
|
344
|
|
|
|
|
345
|
|
|
str = marshal.encode(packet) |
|
346
|
|
|
|
|
347
|
|
|
print repr(str) |
|
348
|
|
|
print len(str) |
|
349
|
|
|
packet = marshal.decode(str) |
|
350
|
|
|
print packet.params |
|
351
|
|
|
|
|
352
|
|
|
import pprint |
|
353
|
|
|
pprint.pprint(packet.params) |
|
354
|
|
|
|
|
355
|
|
|
|