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104 lines
3.4 KiB
Python
104 lines
3.4 KiB
Python
#!/usr/bin/env python
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'''
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@author: David Shaw, david.shaw.aw@gmail.com
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Inspired by EAS Inspector for Fiddler
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https://easinspectorforfiddler.codeplex.com
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----- The MIT License (MIT) -----
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Filename: ASWBXMLByteQueue.py
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Copyright (c) 2014, David P. Shaw
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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'''
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from Queue import Queue
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import logging
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class ASWBXMLByteQueue(Queue):
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def __init__(self, wbxmlBytes):
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self.bytesDequeued = 0
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self.bytesEnqueued = 0
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Queue.__init__(self)
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for byte in wbxmlBytes:
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self.put(ord(byte))
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self.bytesEnqueued += 1
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logging.debug("Array byte count: %d, enqueued: %d" % (self.qsize(), self.bytesEnqueued))
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"""
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Created to debug the dequeueing of bytes
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"""
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def dequeueAndLog(self):
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singleByte = self.get()
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self.bytesDequeued += 1
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logging.debug("Dequeued byte 0x{0:X} ({1} total)".format(singleByte, self.bytesDequeued))
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return singleByte
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"""
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Return true if the continuation bit is set in the byte
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"""
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def checkContinuationBit(self, byteval):
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continuationBitmask = 0x80
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return (continuationBitmask & byteval) != 0
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def dequeueMultibyteInt(self):
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iReturn = 0
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singleByte = 0xFF
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while True:
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iReturn <<= 7
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if (self.qsize() == 0):
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break
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else:
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singleByte = self.dequeueAndLog()
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iReturn += int(singleByte & 0x7F)
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if not self.checkContinuationBit(singleByte):
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return iReturn
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def dequeueString(self, length=None):
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if ( length != None):
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currentByte = 0x00
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strReturn = ""
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for i in range(0, length):
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# TODO: Improve this handling. We are technically UTF-8, meaning
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# that characters could be more than one byte long. This will fail if we have
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# characters outside of the US-ASCII range
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if ( self.qsize() == 0 ):
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break
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currentByte = self.dequeueAndLog()
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strReturn += chr(currentByte)
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else:
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currentByte = 0x00
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strReturn = ""
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while True:
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currentByte = self.dequeueAndLog()
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if (currentByte != 0x00):
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strReturn += chr(currentByte)
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else:
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break
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return strReturn
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