Package translate :: Package storage :: Module xpi

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# Source Code for Module translate.storage.xpi

      1  #!/usr/bin/env python
      2  # -*- coding: utf-8 -*-
      3  #
      4  # Copyright 2004, 2005 Zuza Software Foundation
      5  #
      6  # This file is part of translate.
      7  #
      8  # translate is free software; you can redistribute it and/or modify
      9  # it under the terms of the GNU General Public License as published by
     10  # the Free Software Foundation; either version 2 of the License, or
     11  # (at your option) any later version.
     12  #
     13  # translate is distributed in the hope that it will be useful,
     14  # but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  # GNU General Public License for more details.
     17  #
     18  # You should have received a copy of the GNU General Public License
     19  # along with translate; if not, write to the Free Software
     20  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     21
     22  """module for accessing mozilla xpi packages"""
     23
     24  from __future__ import generators
     25  import zipfile
     26  import os.path
     27  import StringIO
     28  import re
     29
     30  from translate import __version__
     31
     32  # we have some enhancements to zipfile in a file called zipfileext
     33  # hopefully they will be included in a future version of python
     34  from translate.misc import zipfileext
     35  ZipFileBase = zipfileext.ZipFileExt
     36
     37
     38  from translate.misc import wStringIO
     39  # this is a fix to the StringIO in Python 2.3.3
     40  # submitted as patch 951915 on sourceforge
     41 -class FixedStringIO(wStringIO.StringIO):
     42
     43 -    def truncate(self, size=None):
     44          StringIO.StringIO.truncate(self, size)
     45          self.len = len(self.buf)
     46
     47  NamedStringInput = wStringIO.StringIO
     48  NamedStringOutput = wStringIO.StringIO
     49
     50
     51 -def _commonprefix(itemlist):
     52
     53      def cp(a, b):
     54          l = min(len(a), len(b))
     55          for n in range(l):
     56              if a[n] != b[n]:
     57                  return a[:n]
     58          return a[:l]
     59      if itemlist:
     60          return reduce(cp, itemlist)
     61      else:
     62          return ''
     63
     64
     65 -def rememberchanged(self, method):
     66
     67      def changed(*args, **kwargs):
     68          self.changed = True
     69          method(*args, **kwargs)
     70      return changed
     71
     72
     73 -class CatchPotentialOutput(NamedStringInput, object):
     74      """catches output if there has been, before closing"""
     75
     76 -    def __init__(self, contents, onclose):
     77          """Set up the output stream, and remember a method to call on closing"""
     78          NamedStringInput.__init__(self, contents)
     79          self.onclose = onclose
     80          self.changed = False
     81          s = super(CatchPotentialOutput, self)
     82          self.write = rememberchanged(self, s.write)
     83          self.writelines = rememberchanged(self, s.writelines)
     84          self.truncate = rememberchanged(self, s.truncate)
     85
     86 -    def close(self):
     87          """wrap the underlying close method, to pass the value to onclose before it goes"""
     88          if self.changed:
     89              value = self.getvalue()
     90              self.onclose(value)
     91          NamedStringInput.close(self)
     92
     93 -    def flush(self):
     94          """zip files call flush, not close, on file-like objects"""
     95          value = self.getvalue()
     96          self.onclose(value)
     97          NamedStringInput.flush(self)
     98
     99 -    def slam(self):
    100          """use this method to force the closing of the stream if it isn't closed yet"""
    101          if not self.closed:
    102              self.close()
    103
    104
    105 -class ZipFileCatcher(ZipFileBase, object):
    106      """a ZipFile that calls any methods its instructed to before closing (useful for catching stream output)"""
    107
    108 -    def __init__(self, *args, **kwargs):
    109          """initialize the ZipFileCatcher"""
    110          # storing oldclose as attribute, since if close is called from __del__ it has no access to external variables
    111          self.oldclose = super(ZipFileCatcher, self).close
    112          super(ZipFileCatcher, self).__init__(*args, **kwargs)
    113
    114 -    def addcatcher(self, pendingsave):
    115          """remember to call the given method before closing"""
    116          if hasattr(self, "pendingsaves"):
    117              if not pendingsave in self.pendingsaves:
    118                  self.pendingsaves.append(pendingsave)
    119          else:
    120              self.pendingsaves = [pendingsave]
    121
    122 -    def close(self):
    123          """close the stream, remembering to call any addcatcher methods first"""
    124          if hasattr(self, "pendingsaves"):
    125              for pendingsave in self.pendingsaves:
    126                  pendingsave()
    127          # if close is called from __del__, it somehow can't see ZipFileCatcher, so we've cached oldclose...
    128          if ZipFileCatcher is None:
    129              self.oldclose()
    130          else:
    131              super(ZipFileCatcher, self).close()
    132
    133 -    def overwritestr(self, zinfo_or_arcname, bytes):
    134          """writes the string into the archive, overwriting the file if it exists..."""
    135          if isinstance(zinfo_or_arcname, zipfile.ZipInfo):
    136              filename = zinfo_or_arcname.filename
    137          else:
    138              filename = zinfo_or_arcname
    139          if filename in self.NameToInfo:
    140              self.delete(filename)
    141          self.writestr(zinfo_or_arcname, bytes)
    142          self.writeendrec()
    143
    144
    145 -class XpiFile(ZipFileCatcher):
    146
    147 -    def __init__(self, *args, **kwargs):
    148          """sets up the xpi file"""
    149          self.includenonloc = kwargs.get("includenonloc", True)
    150          if "includenonloc" in kwargs:
    151              del kwargs["includenonloc"]
    152          if "compression" not in kwargs:
    153              kwargs["compression"] = zipfile.ZIP_DEFLATED
    154          self.locale = kwargs.pop("locale", None)
    155          self.region = kwargs.pop("region", None)
    156          super(XpiFile, self).__init__(*args, **kwargs)
    157          self.jarfiles = {}
    158          self.findlangreg()
    159          self.jarprefixes = self.findjarprefixes()
    160          self.reverseprefixes = dict([
    161              (prefix, jarfilename) for jarfilename, prefix in self.jarprefixes.iteritems() if prefix])
    162          self.reverseprefixes["package/"] = None
    163
    164 -    def iterjars(self):
    165          """iterate through the jar files in the xpi as ZipFile objects"""
    166          for filename in self.namelist():
    167              if filename.lower().endswith('.jar'):
    168                  if filename not in self.jarfiles:
    169                      jarstream = self.openinputstream(None, filename)
    170                      jarfile = ZipFileCatcher(jarstream, mode=self.mode)
    171                      self.jarfiles[filename] = jarfile
    172                  else:
    173                      jarfile = self.jarfiles[filename]
    174                  yield filename, jarfile
    175
    176 -    def islocfile(self, filename):
    177          """returns whether the given file is needed for localization (basically .dtd and .properties)"""
    178          base, ext = os.path.splitext(filename)
    179          return ext in (os.extsep + "dtd", os.extsep + "properties")
    180
    181 -    def findlangreg(self):
    182          """finds the common prefix of all the files stored in the jar files"""
    183          dirstructure = {}
    184          locale = self.locale
    185          region = self.region
    186          localematch = re.compile("^[a-z]{2,3}(-[a-zA-Z]{2,3}|)$")
    187          regionmatch = re.compile("^[a-zA-Z]{2,3}$")
    188          # exclude en-mac, en-win, en-unix for seamonkey
    189          osmatch = re.compile("^[a-z]{2,3}-(mac|unix|win)$")
    190          for jarfilename, jarfile in self.iterjars():
    191              jarname = "".join(jarfilename.split('/')[-1:]).replace(".jar", "", 1)
    192              if localematch.match(jarname) and not osmatch.match(jarname):
    193                  if locale is None:
    194                      locale = jarname
    195                  elif locale != jarname:
    196                      locale = 0
    197              elif regionmatch.match(jarname):
    198                  if region is None:
    199                      region = jarname
    200                  elif region != jarname:
    201                      region = 0
    202              for filename in jarfile.namelist():
    203                  if filename.endswith('/'):
    204                      continue
    205                  if not self.islocfile(filename) and not self.includenonloc:
    206                      continue
    207                  parts = filename.split('/')[:-1]
    208                  treepoint = dirstructure
    209                  for partnum in range(len(parts)):
    210                      part = parts[partnum]
    211                      if part in treepoint:
    212                          treepoint = treepoint[part]
    213                      else:
    214                          treepoint[part] = {}
    215                          treepoint = treepoint[part]
    216          localeentries = {}
    217          if 'locale' in dirstructure:
    218              for dirname in dirstructure['locale']:
    219                  localeentries[dirname] = 1
    220                  if localematch.match(dirname) and not osmatch.match(dirname):
    221                      if locale is None:
    222                          locale = dirname
    223                      elif locale != dirname:
    224                          print "locale dir mismatch - ", dirname, "but locale is", locale, "setting to 0"
    225                          locale = 0
    226                  elif regionmatch.match(dirname):
    227                      if region is None:
    228                          region = dirname
    229                      elif region != dirname:
    230                          region = 0
    231          if locale and locale in localeentries:
    232              del localeentries[locale]
    233          if region and region in localeentries:
    234              del localeentries[region]
    235          if locale and not region:
    236              if "-" in locale:
    237                  region = locale.split("-", 1)[1]
    238              else:
    239                  region = ""
    240          self.setlangreg(locale, region)
    241
    242 -    def setlangreg(self, locale, region):
    243          """set the locale and region of this xpi"""
    244          if locale == 0 or locale is None:
    245              raise ValueError("unable to determine locale")
    246          self.locale = locale
    247          self.region = region
    248          self.dirmap = {}
    249          if self.locale is not None:
    250              self.dirmap[('locale', self.locale)] = ('lang-reg',)
    251          if self.region:
    252              self.dirmap[('locale', self.region)] = ('reg',)
    253
    254 -    def findjarprefixes(self):
    255          """checks the uniqueness of the jar files contents"""
    256          uniquenames = {}
    257          jarprefixes = {}
    258          for jarfilename, jarfile in self.iterjars():
    259              jarprefixes[jarfilename] = ""
    260              for filename in jarfile.namelist():
    261                  if filename.endswith('/'):
    262                      continue
    263                  if filename in uniquenames:
    264                      jarprefixes[jarfilename] = True
    265                      jarprefixes[uniquenames[filename]] = True
    266                  else:
    267                      uniquenames[filename] = jarfilename
    268          for jarfilename, hasconflicts in jarprefixes.items():
    269              if hasconflicts:
    270                  shortjarfilename = os.path.split(jarfilename)[1]
    271                  shortjarfilename = os.path.splitext(shortjarfilename)[0]
    272                  jarprefixes[jarfilename] = shortjarfilename + '/'
    273          # this is a clever trick that will e.g. remove zu- from zu-win, zu-mac, zu-unix
    274          commonjarprefix = _commonprefix([prefix for prefix in jarprefixes.itervalues() if prefix])
    275          if commonjarprefix:
    276              for jarfilename, prefix in jarprefixes.items():
    277                  if prefix:
    278                      jarprefixes[jarfilename] = prefix.replace(commonjarprefix, '', 1)
    279          return jarprefixes
    280
    281 -    def ziptoospath(self, zippath):
    282          """converts a zipfile filepath to an os-style filepath"""
    283          return os.path.join(*zippath.split('/'))
    284
    285 -    def ostozippath(self, ospath):
    286          """converts an os-style filepath to a zipfile filepath"""
    287          return '/'.join(ospath.split(os.sep))
    288
    289 -    def mapfilename(self, filename):
    290          """uses a map to simplify the directory structure"""
    291          parts = tuple(filename.split('/'))
    292          possiblematch = None
    293          for prefix, mapto in self.dirmap.iteritems():
    294              if parts[:len(prefix)] == prefix:
    295                  if possiblematch is None or len(possiblematch[0]) < len(prefix):
    296                      possiblematch = prefix, mapto
    297          if possiblematch is not None:
    298              prefix, mapto = possiblematch
    299              mapped = mapto + parts[len(prefix):]
    300              return '/'.join(mapped)
    301          return filename
    302
    303 -    def mapxpifilename(self, filename):
    304          """uses a map to rename files that occur straight in the xpi"""
    305          if filename.startswith('bin/chrome/') and filename.endswith(".manifest"):
    306              return 'bin/chrome/lang-reg.manifest'
    307          return filename
    308
    309 -    def reversemapfile(self, filename):
    310          """unmaps the filename..."""
    311          possiblematch = None
    312          parts = tuple(filename.split('/'))
    313          for prefix, mapto in self.dirmap.iteritems():
    314              if parts[:len(mapto)] == mapto:
    315                  if possiblematch is None or len(possiblematch[0]) < len(mapto):
    316                      possiblematch = (mapto, prefix)
    317          if possiblematch is None:
    318              return filename
    319          mapto, prefix = possiblematch
    320          reversemapped = prefix + parts[len(mapto):]
    321          return '/'.join(reversemapped)
    322
    323 -    def reversemapxpifilename(self, filename):
    324          """uses a map to rename files that occur straight in the xpi"""
    325          if filename == 'bin/chrome/lang-reg.manifest':
    326              if self.locale:
    327                  return '/'.join(('bin', 'chrome', self.locale + '.manifest'))
    328              else:
    329                  for otherfilename in self.namelist():
    330                      if otherfilename.startswith("bin/chrome/") and otherfilename.endswith(".manifest"):
    331                          return otherfilename
    332          return filename
    333
    334 -    def jartoospath(self, jarfilename, filename):
    335          """converts a filename from within a jarfile to an os-style filepath"""
    336          if jarfilename:
    337              jarprefix = self.jarprefixes[jarfilename]
    338              return self.ziptoospath(jarprefix + self.mapfilename(filename))
    339          else:
    340              return self.ziptoospath(os.path.join("package", self.mapxpifilename(filename)))
    341
    342 -    def ostojarpath(self, ospath):
    343          """converts an extracted os-style filepath to a jarfilename and filename"""
    344          zipparts = ospath.split(os.sep)
    345          prefix = zipparts[0] + '/'
    346          if prefix in self.reverseprefixes:
    347              jarfilename = self.reverseprefixes[prefix]
    348              filename = self.reversemapfile('/'.join(zipparts[1:]))
    349              if jarfilename is None:
    350                  filename = self.reversemapxpifilename(filename)
    351              return jarfilename, filename
    352          else:
    353              filename = self.ostozippath(ospath)
    354              if filename in self.namelist():
    355                  return None, filename
    356              filename = self.reversemapfile('/'.join(zipparts))
    357              possiblejarfilenames = [jarfilename for jarfilename, prefix in self.jarprefixes.iteritems() if not prefix]
    358              for jarfilename in possiblejarfilenames:
    359                  jarfile = self.jarfiles[jarfilename]
    360                  if filename in jarfile.namelist():
    361                      return jarfilename, filename
    362              raise IndexError("ospath not found in xpi file, could not guess location: %r" % ospath)
    363
    364 -    def jarfileexists(self, jarfilename, filename):
    365          """checks whether the given file exists inside the xpi"""
    366          if jarfilename is None:
    367              return filename in self.namelist()
    368          else:
    369              jarfile = self.jarfiles[jarfilename]
    370              return filename in jarfile.namelist()
    371
    372 -    def ospathexists(self, ospath):
    373          """checks whether the given file exists inside the xpi"""
    374          jarfilename, filename = self.ostojarpath(ospath)
    375          if jarfilename is None:
    376              return filename in self.namelist()
    377          else:
    378              jarfile = self.jarfiles[jarfilename]
    379              return filename in jarfile.namelist()
    380
    381 -    def openinputstream(self, jarfilename, filename):
    382          """opens a file (possibly inside a jarfile as a StringIO"""
    383          if jarfilename is None:
    384              contents = self.read(filename)
    385
    386              def onclose(contents):
    387                  if contents != self.read(filename):
    388                      self.overwritestr(filename, contents)
    389              inputstream = CatchPotentialOutput(contents, onclose)
    390              self.addcatcher(inputstream.slam)
    391          else:
    392              jarfile = self.jarfiles[jarfilename]
    393              contents = jarfile.read(filename)
    394              inputstream = NamedStringInput(contents)
    395          inputstream.name = self.jartoospath(jarfilename, filename)
    396          if hasattr(self.fp, 'name'):
    397              inputstream.name = "%s:%s" % (self.fp.name, inputstream.name)
    398          return inputstream
    399
    400 -    def openoutputstream(self, jarfilename, filename):
    401          """opens a file for writing (possibly inside a jarfile as a StringIO"""
    402          if jarfilename is None:
    403
    404              def onclose(contents):
    405                  self.overwritestr(filename, contents)
    406          else:
    407              if jarfilename in self.jarfiles:
    408                  jarfile = self.jarfiles[jarfilename]
    409              else:
    410                  jarstream = self.openoutputstream(None, jarfilename)
    411                  jarfile = ZipFileCatcher(jarstream, "w")
    412                  self.jarfiles[jarfilename] = jarfile
    413                  self.addcatcher(jarstream.slam)
    414
    415              def onclose(contents):
    416                  jarfile.overwritestr(filename, contents)
    417          outputstream = wStringIO.CatchStringOutput(onclose)
    418          outputstream.name = "%s %s" % (jarfilename, filename)
    419          if jarfilename is None:
    420              self.addcatcher(outputstream.slam)
    421          else:
    422              jarfile.addcatcher(outputstream.slam)
    423          return outputstream
    424
    425 -    def close(self):
    426          """Close the file, and for mode "w" and "a" write the ending records."""
    427          for jarfile in self.jarfiles.itervalues():
    428              jarfile.close()
    429          super(XpiFile, self).close()
    430
    431 -    def testzip(self):
    432          """test the xpi zipfile and all enclosed jar files..."""
    433          for jarfile in self.jarfiles.itervalues():
    434              jarfile.testzip()
    435          super(XpiFile, self).testzip()
    436
    437 -    def restructurejar(self, origjarfilename, newjarfilename, otherxpi, newlang, newregion):
    438          """Create a new .jar file with the same contents as the given name, but rename directories, write to outputstream"""
    439          jarfile = self.jarfiles[origjarfilename]
    440          origlang = self.locale[:self.locale.find("-")]
    441          if newregion:
    442              newlocale = "%s-%s" % (newlang, newregion)
    443          else:
    444              newlocale = newlang
    445          for filename in jarfile.namelist():
    446              filenameparts = filename.split("/")
    447              for i in range(len(filenameparts)):
    448                  part = filenameparts[i]
    449                  if part == origlang:
    450                      filenameparts[i] = newlang
    451                  elif part == self.locale:
    452                      filenameparts[i] = newlocale
    453                  elif part == self.region:
    454                      filenameparts[i] = newregion
    455              newfilename = '/'.join(filenameparts)
    456              fileoutputstream = otherxpi.openoutputstream(newjarfilename, newfilename)
    457              fileinputstream = self.openinputstream(origjarfilename, filename)
    458              fileoutputstream.write(fileinputstream.read())
    459              fileinputstream.close()
    460              fileoutputstream.close()
    461
    462 -    def clone(self, newfilename, newmode=None, newlang=None, newregion=None):
    463          """Create a new .xpi file with the same contents as this one..."""
    464          other = XpiFile(newfilename, "w", locale=newlang, region=newregion)
    465          origlang = self.locale[:self.locale.find("-")]
    466          # TODO: check if this language replacement code is still neccessary
    467          if newlang is None:
    468              newlang = origlang
    469          if newregion is None:
    470              newregion = self.region
    471          if newregion:
    472              newlocale = "%s-%s" % (newlang, newregion)
    473          else:
    474              newlocale = newlang
    475          for filename in self.namelist():
    476              filenameparts = filename.split('/')
    477              basename = filenameparts[-1]
    478              if basename.startswith(self.locale):
    479                  newbasename = basename.replace(self.locale, newlocale)
    480              elif basename.startswith(origlang):
    481                  newbasename = basename.replace(origlang, newlang)
    482              elif basename.startswith(self.region):
    483                  newbasename = basename.replace(self.region, newregion)
    484              else:
    485                  newbasename = basename
    486              if newbasename != basename:
    487                  filenameparts[-1] = newbasename
    488                  renamefilename = "/".join(filenameparts)
    489                  print "cloning", filename, "and renaming to", renamefilename
    490              else:
    491                  print "cloning", filename
    492                  renamefilename = filename
    493              if filename.lower().endswith(".jar"):
    494                  self.restructurejar(filename, renamefilename, other, newlang, newregion)
    495              else:
    496                  inputstream = self.openinputstream(None, filename)
    497                  outputstream = other.openoutputstream(None, renamefilename)
    498                  outputstream.write(inputstream.read())
    499                  inputstream.close()
    500                  outputstream.close()
    501          other.close()
    502          if newmode is None:
    503              newmode = self.mode
    504          if newmode == "w":
    505              newmode = "a"
    506          other = XpiFile(newfilename, newmode)
    507          other.setlangreg(newlocale, newregion)
    508          return other
    509
    510 -    def iterextractnames(self, includenonjars=False, includedirs=False):
    511          """iterates through all the localization files with the common prefix stripped and a jarfile name added if neccessary"""
    512          if includenonjars:
    513              for filename in self.namelist():
    514                  if filename.endswith('/') and not includedirs:
    515                      continue
    516                  if not self.islocfile(filename) and not self.includenonloc:
    517                      continue
    518                  if not filename.lower().endswith(".jar"):
    519                      yield self.jartoospath(None, filename)
    520          for jarfilename, jarfile in self.iterjars():
    521              for filename in jarfile.namelist():
    522                  if filename.endswith('/'):
    523                      if not includedirs:
    524                          continue
    525                  if not self.islocfile(filename) and not self.includenonloc:
    526                      continue
    527                  yield self.jartoospath(jarfilename, filename)
    528
    529      # the following methods are required by translate.convert.ArchiveConvertOptionParser #
    530 -    def __iter__(self):
    531          """iterates through all the files. this is the method use by the converters"""
    532          for inputpath in self.iterextractnames(includenonjars=True):
    533              yield inputpath
    534
    535 -    def __contains__(self, fullpath):
    536          """returns whether the given pathname exists in the archive"""
    537          try:
    538              jarfilename, filename = self.ostojarpath(fullpath)
    539          except IndexError:
    540              return False
    541          return self.jarfileexists(jarfilename, filename)
    542
    543 -    def openinputfile(self, fullpath):
    544          """opens an input file given the full pathname"""
    545          jarfilename, filename = self.ostojarpath(fullpath)
    546          return self.openinputstream(jarfilename, filename)
    547
    548 -    def openoutputfile(self, fullpath):
    549          """opens an output file given the full pathname"""
    550          try:
    551              jarfilename, filename = self.ostojarpath(fullpath)
    552          except IndexError:
    553              return None
    554          return self.openoutputstream(jarfilename, filename)
    555
    556
    557  if __name__ == '__main__':
    558      import optparse
    559      optparser = optparse.OptionParser(version="%prog " + __version__.sver)
    560      optparser.usage = "%prog [-l|-x] [options] file.xpi"
    561      optparser.add_option("-l", "--list", help="list files", \
    562          action="store_true", dest="listfiles", default=False)
    563      optparser.add_option("-p", "--prefix", help="show common prefix", \
    564          action="store_true", dest="showprefix", default=False)
    565      optparser.add_option("-x", "--extract", help="extract files", \
    566          action="store_true", dest="extractfiles", default=False)
    567      optparser.add_option("-d", "--extractdir", help="extract into EXTRACTDIR", \
    568          default=".", metavar="EXTRACTDIR")
    569      (options, args) = optparser.parse_args()
    570      if len(args) < 1:
    571          optparser.error("need at least one argument")
    572      xpifile = XpiFile(args[0])
    573      if options.showprefix:
    574          for prefix, mapto in xpifile.dirmap.iteritems():
    575              print "/".join(prefix), "->", "/".join(mapto)
    576      if options.listfiles:
    577          for name in xpifile.iterextractnames(includenonjars=True, includedirs=True):
    578              print name #, xpifile.ostojarpath(name)
    579      if options.extractfiles:
    580          if options.extractdir and not os.path.isdir(options.extractdir):
    581              os.mkdir(options.extractdir)
    582          for name in xpifile.iterextractnames(includenonjars=True, includedirs=False):
    583              abspath = os.path.join(options.extractdir, name)
    584              # check neccessary directories exist - this way we don't create empty directories
    585              currentpath = options.extractdir
    586              subparts = os.path.dirname(name).split(os.sep)
    587              for part in subparts:
    588                  currentpath = os.path.join(currentpath, part)
    589                  if not os.path.isdir(currentpath):
    590                      os.mkdir(currentpath)
    591              outputstream = open(abspath, 'w')
    592              jarfilename, filename = xpifile.ostojarpath(name)
    593              inputstream = xpifile.openinputstream(jarfilename, filename)
    594              outputstream.write(inputstream.read())
    595              outputstream.close()
    596