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umd.py
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umd.py
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#!/usr/bin/python
# coding: utf8
#########################################################################
# Author: Xinyu.Xiang(John)
# email: [email protected]
# Created Time: 2009年05月20日 星期三 15时33分55秒
# File Name: umd.py
# Description:
#########################################################################
import datetime
import struct
import cStringIO
import Image
import zlib
import random
class Chapter(object):
def _getTitle(self):
return self.title
def _setTitle(self,value):
self.title=value
Title=property(_getTitle,_setTitle,None,'unicode,title of the chapter')
def _getContent(self):
return self.content
def _setContent(self,value):
self.content=value
Content=property(_getContent,_setContent,None,'unicode,content of the chapter')
def __init__(self,title,content):
self.title=title
self.content=content
class UMDFile(object):
def __init__(self):
self.additionalCheck = 0
self.author = ''
self.chapOff = []
self.chapters = []
self.cid = 0
self.contentLength =0
self.cover=None
self.day=None
self.encoding='utf-16-le'
self.gender=''
self.month=None
self.pgkSeed=0
self.publishDate=datetime.datetime.now()
self.publisher=''
self.title=''
self.type=None
self.vendor=''
self.year=None
self.zippedSeg=[]
self.arrJpeg=[]
def _getArrJpeg(self):
return self.arrJpeg
def _setArrJpeg(self,value):
self.arrJpeg=value
#ArrJpeg=property(_getArrJpeg,_setArrJpeg,None,'a list of image')
def _getTitle(self):
return self.title
def _setTitle(self,value):
self.title=value
Title=property(_getTitle,_setTitle,None,'unicode,umd title')
def _getChapters(self):
return self.chapters
def _setChapters(self,value):
self.chapters=value
Chapters=property(_getChapters,_setChapters,None,'Chapters,list of Chapter')
def _getPublisher(self):
return self.publisher
def _setPublisher(self,value):
self.publisher=value
Publisher=property(_getPublisher,_setPublisher,None,'unicode,Publisher')
def _getCover(self):
return self.cover
def _setCover(self,value):
self.cover=value
Cover=property(_getCover,_setCover,None,'Cover: an Image(in module pil), the cover of the book')
def _getAuthor(self):
return self.author
def _setAuthor(self,value):
self.author=value
Author=property(_getAuthor,_setAuthor,None,'unicode,Author')
def read(self,ufile):
'''
ufile: binary file-like object
'''
self.chapters=[]
self.arrJpeg=[]
num1=self._readuint32(ufile)
if num1 != 0xde9a9b89:
raise UMDException('wrong header')
ch1=self._peekchar(ufile)
while ch1=='#':
ufile.read(1)
num2=self._readint16(ufile)
num3=self._readbyte(ufile)
num4=self._readbyte(ufile)-5
self._readSection(num2,num3,num4,ufile)
ch1=self._peekchar(ufile)
if num2==0xf1 or num2==10:
num2=0x84
while ch1=='$':
ufile.read(1)
num5=self._readuint32(ufile)
num6=self._readuint32(ufile)-9
#print ufile.tell()
self._readadditional(num2,num5,num6,ufile)
ch1=self._peekchar(ufile)
#print ufile.tell()
#print ufile.tell()
ufile.close()
if self.type=='2':
return
extlist=[]
#print self.zippedSeg
for zitm in self.zippedSeg:
extlist.append(zlib.decompress(zitm))
totalcontent=''.join(extlist)
for i in xrange(len(self.chapOff)):
stt=self.chapOff[i]
if i<len(self.chapOff)-1:
ed=self.chapOff[i+1]
else:
ed=len(totalcontent)
#print 'stt',stt,'ed',ed,'len(totalcontent)',len(totalcontent)
self.chapters[i].content=totalcontent[stt:ed].decode(self.encoding)
self.zippedSeg=[]
self.publishDate=datetime.datetime(int(self.year),int(self.month),int(self.day))
def _readadditional(self,id,check,length,ufile):
if id==0x0e:
self.arrJpeg.append(self._readimg(ufile,length))
return
elif id==0x0f:
return
elif id==0x81:
ufile.read(length)
return
elif id==130:
self.cover=self._readimg(ufile,length)
return
elif id==0x83:
self.chapOff=[0]*(length/4)
num1=0
while num1 < len(self.chapOff):
self.chapOff[num1]=self._readint32(ufile)
num1+=1
return
elif id==0x84:
if self.additionalCheck != check:
self.zippedSeg.append(ufile.read(length))
return
num2=0
buffer1=ufile.read(length)
while num2 < len(buffer1):
num3=ord(buffer1[num2])
num2+=1
self.chapters.append(Chapter(buffer1[num2:num2+num3].decode(self.encoding),u''))
num2+=num3
return
else:
ufile.read(length)
return
def _readimg(self,ufile,length):
return Image.open(cStringIO.StringIO(ufile.read(length)))
def _writeimg(self,ufile,img):
img.save(ufile,'gif')
def _readbyte(self,ufile):
return ord(ufile.read(1))
def _writebyte(self,ufile,b):
ufile.write(chr(b))
def _readchar(self,ufile):
return ufile.read(1)
def _writechar(self,ufile,c):
ufile.write(c)
def _peekchar(self,ufile):
c=ufile.read(1)
ufile.seek(-1,1)
return c
def _readint32(self,ufile):
return struct.unpack('<i',ufile.read(4))[0]
def _writeint32(self,ufile,i32):
ufile.write(struct.pack('<i',i32))
def _readuint32(self,ufile):
return struct.unpack('<I',ufile.read(4))[0]
def _writeuint32(self,ufile,ui32):
ufile.write(struct.pack('<I',ui32))
def _readint16(self,ufile):
return struct.unpack('<h',ufile.read(2))[0]
def _writeint16(self,ufile,i16):
ufile.write(struct.pack('<h',i16))
def _readstr2uni(self,ufile,length):
return ufile.read(length).decode(self.encoding)
def _writeuni2str(self,ufile,us):
ufile.write(us.encode(self.encoding))
def _readSection(self,id,b,length,ufile):
if id==1:
self.type=str(self._readbyte(ufile))
self.pgkSeed=self._readint16(ufile)
return
elif id==2:
self.title= self._readstr2uni(ufile,length)
return
elif id==3:
self.author= self._readstr2uni(ufile,length)
return
elif id==4:
self.year=self._readstr2uni(ufile,length)
return
elif id==5:
self.month=self._readstr2uni(ufile,length)
return
elif id==6:
self.day=self._readstr2uni(ufile,length)
return
elif id==7:
self.gender=self._readstr2uni(ufile,length)
return
elif id==8:
self.publisher=self._readstr2uni(ufile,length)
return
elif id==9:
self.vendor=self._readstr2uni(ufile,length)
return
elif id==10:
self.cid=self._readint32(ufile)
return
elif id==11:
self.contentLength = self._readint32(ufile)
return
elif id==12:
ufile.read(4)
return
elif id==0x81 or id==0x83 or id==0x84:
self.additionalCheck=self._readuint32(ufile)
return
elif id==0x0e:
ufile.read(1)
return
elif id==0x0f:
ufile.read(1)
return
elif id==130:
ufile.read(1)
self.additionalCheck=self._readuint32(ufile)
return
ufile.read(length)
def _prewrite(self):
if len(self.title)==0:
raise UMDException('need umd title')
if len(self.author)==0:
raise UMDException('need umd author')
if len(self.chapters)==0:
raise UMDException('no chapters')
for chpt in self.chapters:
if chpt.content[-1]!=u'\u2029':
chpt.content=chpt.content+u'\u2029'
self.zippedSeg=[]
self.chapOff=[0]*len(self.chapters)
self.year=str(self.publishDate.year)
self.month=str(self.publishDate.month)
self.day=str(self.publishDate.day)
self.pgkSeed=random.randint(0x401,0x7ffe)%0xffff
self.cid=random.randint(0x5f5e101,0x3b9aca00-1)
num1=0
cttlst=[]
for i in xrange(len(self.chapters)):
chpt=self.chapters[i]
chpt.content=chpt.content.replace(u'\r\n',u'\u2029')
cttlst.append(chpt.content)
self.chapOff[i]=num1
num1+=len(chpt.content)*2
self.contentLength=num1
self.text=u''.join(cttlst)
cttbuflst=[]
for i in xrange(len(self.chapters)):
chpt=self.chapters[i]
cttbuflst.append(chpt.content.encode(self.encoding))
cttbuf=''.join(cttbuflst)
if len(cttbuf)%0x8000 ==0:
num2= len(cttbuf)/0x8000
else:
num2=len(cttbuf)/0x8000 +1
num1=0
for i in xrange(num2):
stt=num1
if 0x8000 < len(cttbuf)-num1:
ed=num1+0x8000
else:
ed=num1+len(cttbuf)-num1
cdt=zlib.compress(cttbuf[stt:ed])
self.zippedSeg.append(cdt)
num1=ed
def write(self,ufile):
'''
ufile: a binary file-like object
'''
self._prewrite()
self._writeuint32(ufile,0xde9a9b89)
self._writesection(1,0,3,ufile)
self._writesection(2,0,len(self.title.encode(self.encoding)),ufile)
self._writesection(3,0,len(self.author.encode(self.encoding)),ufile)
self._writesection(4,0,len(self.year.encode(self.encoding)),ufile)
self._writesection(5,0,len(self.month.encode(self.encoding)),ufile)
self._writesection(6,0,len(self.day.encode(self.encoding)),ufile)
if len(self.gender)!=0:
self._writesection(7,0,len(self.gender.encode(self.encoding)),ufile)
if len(self.publisher)!=0:
self._writesection(8,0,len(self.publisher.encode(self.encoding)),ufile)
if len(self.vendor)!=0:
self._writesection(7,0,len(self.vendor.encode(self.encoding)),ufile)
self._writesection(11,0,4,ufile)
self.additionalCheck=0x3000+random.randint(0,0xfff-1)
self._writesection(0x83,0,4,ufile)
self._writeadditional(0x83,self.additionalCheck,len(self.chapOff)*4,ufile)
num1=0
for chpt in self.chapters:
num1+=len(chpt.title)*2+1
self.additionalCheck=0x4000+random.randint(0,0xfff-1)
self._writesection(0x84,1,4,ufile)
self._writeadditional(0x84,self.additionalCheck,num1,ufile)
num2=0
num3=0
if len(self.zippedSeg)>1:
num2=random.randint(0,len(self.zippedSeg)-2)
num3=random.randint(0,len(self.zippedSeg)-2)
self.refContent=[0]*len(self.zippedSeg)
for i in xrange(len(self.zippedSeg)):
buffer1=self.zippedSeg[i]
self.refContent[i]=(1<<32)+random.randint(1,0xfffffff-1)*-1
self._writeadditional(0x84,self.refContent[i],len(buffer1),ufile)
if i==num2:
self._writesection(0xf1,0,0x10,ufile)
if i==num3:
self._writesection(10,0,4,ufile)
self.additionalCheck=0x2000+random.randint(0,0xfff-1)
self._writesection(0x81,1,4,ufile)
self._writeadditional(0x81,self.additionalCheck,len(self.refContent)*4,ufile)
if self.cover!=None:
self.additionalCheck=0x1000+random.randint(0,0xfff-1)
tmpf=cStringIO.StringIO()
self.cover.save(tmpf,'gif')
self._writesection(130,1,5,ufile)
self._writeadditional(130,self.additionalCheck,len(tmpf.getvalue()),ufile)
self._writesection(12,1,4,ufile);
ufile.close()
def _writeadditional(self,id,check,length,ufile):
self._writechar(ufile,'$')
self._writeuint32(ufile,check)
self._writeuint32(ufile,length+9)
if id==0x81:
numArray1=self.refContent
num1=0
while num1 <len(numArray1):
num2=numArray1[num1]
self._writeuint32(ufile,num2)
num1+=1
return
elif id==130:
self._writeimg(ufile,self.cover)
elif id==0x83:
numArray2=self.chapOff
num1=0
while num1 < len(numArray2):
num2=numArray2[num1]
self._writeint32(ufile,num2)
num1+=1
return
elif id==0x84:
if self.additionalCheck == check:
for chpt in self.chapters:
self._writebyte(ufile,len(chpt.title)*2)
self._writeuni2str(ufile,chpt.title)
else:
num1=self.refContent.index(check)
if num1 !=-1:
ufile.write(self.zippedSeg[num1])
return
def _writesection(self,id,b,length,ufile):
self._writechar(ufile,'#')
self._writeint16(ufile,id)
self._writebyte(ufile,b)
self._writebyte(ufile,length+5)
if id==1:
self._writebyte(ufile,1)
self._writeint16(ufile,self.pgkSeed)
return
elif id==2:
self._writeuni2str(ufile,self.title)
return
elif id==3:
self._writeuni2str(ufile,self.author)
return
elif id==4:
self._writeuni2str(ufile,self.year)
return
elif id==5:
self._writeuni2str(ufile,self.month)
return
elif id==6:
self._writeuni2str(ufile,self.day)
return
elif id==7:
self._writeuni2str(ufile,self.gender)
return
elif id==8:
self._writeuni2str(ufile,self.publisher)
return
elif id==9:
self._writeuni2str(ufile,self.vendor)
return
elif id==10:
self._writeint32(ufile,self.cid)
return
elif id==11:
self._writeint32(ufile,self.contentLength)
return
elif id==12:
self._writeuint32(ufile,ufile.tell()+4)
return
elif id==0x81 or id==0x83 or id==0x84:
self._writeuint32(ufile,self.additionalCheck)
return
elif id==130:
self._writebyte(ufile,1)
self._writeuint32(ufile,self.additionalCheck)
return
elif id==0xf1:
ufile.write('\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0')
return
class UMDException(Exception):
pass