## page was renamed from MicroProj/2008-02-16 ##language:zh #pragma section-numbers on ::-- ZoomQuiet [<>] <> ## 默许导航,请保留 <> = deflate算法压缩 = 2008/2/16 马踏飞燕 : * 现在需要将一段内容用deflate算法压缩一下，但是找了半天也没找到python有这方面的代码阿。 * 我用zlib压缩出来的结果与用C#压缩出来的结果不一致，导致对方应用程序读不出来，胸闷阿。。。 * 有没有相关的代码阿？ == limodou == {{{limodou reply-to python-cn@googlegroups.com, to python-cn@googlegroups.com, date Sat, Feb 16, 2008 at 10:36 AM }}} subject [CPyUG:40252] [[http://groups.google.com/group/python-cn/t/c1ab48f77f359296|Re: python如何使用deflate压缩算法？]] {{{#!python # Programmer: limodou # E-mail: limodou@gmail.com # # Copyleft 2005 limodou # # Distributed under the terms of the GPL (GNU Public License) # # ZFile is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # $Id$ import zipfile import os import os.path import sys import getopt __appname__ = 'zfile' __author__ = 'limodou' __version__ = '0.1' class ZFile(object): def __init__(self, filename, mode='r', basedir='', visitor=None): self.filename = filename self.mode = mode if self.mode in ('w', 'a'): self.zfile = zipfile.ZipFile(filename, self.mode,compression=zipfile.ZIP_DEFLATED) else: self.zfile = zipfile.ZipFile(filename, self.mode) self.basedir = basedir if not self.basedir: self.basedir = os.path.dirname(filename) self.basedir = os.path.normpath(os.path.abspath(self.basedir)).replace('\\', '/') self.visitor = visitor def addfile(self, path, arcname=None): path = os.path.normpath(path).replace('\\', '/') if not arcname: if path.startswith(self.basedir + '/'): arcname = path[len(self.basedir) + 1:] else: arcname = '' if self.visitor: self.visitor(path, arcname) self.zfile.write(path, arcname) def addstring(self, arcname, string): self.zfile.writestr(arcname, string) def addfiles(self, paths): for path in paths: if isinstance(path, tuple): p, arcname = path p = os.path.abspath(p) if os.path.isdir(p): self.addpath(p) else: self.addfile(p, arcname) else: path = os.path.abspath(path) if os.path.isdir(path): self.addpath(path) else: self.addfile(path) def addpath(self, path): files = self._getallfiles(path) self.addfiles(files) def close(self): self.zfile.close() def extract_to(self, path): for p in self.zfile.namelist(): self.extract(p, path) def extract(self, filename, path): if not filename.endswith('/'): f = os.path.join(path, filename) dir = os.path.dirname(f) if not os.path.exists(dir): os.makedirs(dir) file(f, 'wb').write(self.zfile.read(filename)) def _getallfiles(self, path): fset = [] for root, dirs, files in os.walk(path): for f in files: fset.append(os.path.join(root, f)) return fset def create(zfile, files, basedir='', visitor=None): z = ZFile(zfile, 'w', basedir, visitor=visitor) z.addfiles(files) z.close() def extract(zfile, path): z = ZFile(zfile) z.extract_to(path) z.close() def main(): #process command line cmdstring = "Vhl:i:b:" try: opts, args = getopt.getopt(sys.argv[1:], cmdstring, []) except getopt.GetoptError: Usage() sys.exit(1) filelist = '' inputfiles = '' basedir = '' for o, a in opts: if o == '-V': #version Version() sys.exit() elif o == '-h': Usage() sys.exit() elif o == '-l': filelist = a elif o == '-i': inputfiles = a elif o == '-b': basedir = a if not basedir: basedir = os.getcwd() if inputfiles and filelist or len(args) < 1: Usage() sys.exit() zipfile = args[0] if not inputfiles and len(args) > 1: fout = None if filelist: fout = file(filelist, 'w') def visitor(path, arcname, f=fout): if f: f.write(arcname + '\n') if len(args) == 2 and os.path.isdir(args[1]): create(zipfile, args[1:], basedir, visitor) else: create(zipfile, args[1:], basedir, visitor=visitor) if fout: fout.close() elif inputfiles and len(args) == 1: lines = file(inputfiles).readlines() files = [f.strip() for f in lines] create(zipfile, files, basedir) else: Usage() sys.exit() def Usage(): print """Usage %s [options] zipfilename directories|filenames %s -i listfile zipfilename -V Show version -h Show usage -l Create a listinfo file -i Input file list -b Specify base directory """ % (sys.argv[0], sys.argv[0]) def Version(): print """%s Copyleft GPL Author: %s Version: %s""" % (__appname__, __author__, __version__) if __name__ == '__main__': # a = ZFile('d:/aaaa.zip', 'w') # a.addfile('d:/a.csv') # a.addfile('d:/test/a.JPG') # a.addfile('d:/test/mixin/main.py', 'main.py') # files = ['d:/a.csv', 'd:/test/a.JPG', ('d:/test/mixin/main.py', 'main.py')] ## a.addfiles(files) ## a.close() # create('d:/aaaa.zip', files) # a = ZFile('d:/aaaa.zip') # a.extract_to('d:/test/aaaa') # extract('d:/aaaa.zip', 'd:/test/aaaa/aaaa') main() }}} == 反馈 ==