使用ZipFile从Python的zip文件中提取.app

Question

我正在尝试从快照中提取Chromium.app的新修订版，并且可以很好地下载该文件，但是在提取时，ZipFile要么将chrome-mac文件夹提取为一个文件，要么说目录不不存在，等等。我是python的新手，所以这些错误对我来说意义不大。 这是我到目前为止所拥有的。

import urllib2
response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print latestRev

# we have the revision, now we need to download the zip and extract it
latestZip = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev)), '~/Desktop/ChromiumUpdate/%i-update' % (int(latestRev)))
#declare some vars that hold paths n shit
workingDir = '/Users/slehan/Desktop/ChromiumUpdate/'
chromiumZipPath = '%s%i-update.zip' % (workingDir, (int(latestRev)))
chromiumAppPath = 'chrome-mac/' #the path of the chromium executable within the zip file
chromiumAppExtracted = '%s/Chromium.app' % (workingDir) # path of the extracted executable

output = open(chromiumZipPath, 'w') #delete any current file there
output.write(latestZip.read())
output.close()

# we have the .zip now we need to extract the Chromium.app file, it's in ziproot/chrome-mac/Chromium.app
import zipfile, os
zippedFile = open(chromiumZipPath)
zippedChromium = zipfile.ZipFile(zippedFile, 'r')
zippedChromium.extract(chromiumAppPath, workingDir)
#print zippedChromium.namelist()

zippedChromium.close()
#zippedChromium.close()

有任何想法吗？

Answer 1

看来您在Python中遇到了一个错误 。 此其他问题详细说明了问题和解决方法。 您可以选择使用其中一种变通办法，或者更新至Python 2.6.5或2.7b2。

解决方法之一是建议从固定的Python复制修补的zipfile.py模块 。

祝你好运！

Answer 2

这似乎为我工作：

import os
import urllib2
import zipfile
from StringIO import StringIO

response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print 'getting revision', latestRev

# we have the revision, now we need to download the zip and extract it
locRef='http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev))
latestZip = StringIO(urllib2.urlopen(locRef).read())

# we have the .zip now we need to extract the Chromium.app file, it's in chrome-mac/Chromium.app/
zippedChromium = zipfile.ZipFile(latestZip)
# find all zip members in chrome-mac/Chromium.app
members = [m for m in zippedChromium.namelist() if m.startswith('chrome-mac/Chromium.app/')]
#zippedChromium.extract(chromiumAppPath, workingDir)
target = 'chromium-%s' % latestRev
if os.path.isdir(target):
    print 'destination already exists, exiting'
    raise SystemExit(1)
os.makedirs(target)
zippedChromium.extractall(target, members)

#zippedChromium.close()

Answer 3

这是另一种方法-这是相同的技术，但是可以通过结果证明其有效。

import os
import urllib2
import zipfile
from StringIO import StringIO

response = urllib2.urlopen('http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/LATEST')
latestRev = response.read()
print 'getting revision', latestRev

# we have the revision, now we need to download the zip and extract it
locRef='http://build.chromium.org/buildbot/snapshots/chromium-rel-mac/%i/chrome-mac.zip' % (int(latestRev))
latestZip = StringIO(urllib2.urlopen(locRef).read())

# we have the .zip now we need to extract the Chromium.app file, it's in chrome-mac/Chromium.app/
zippedChromium = zipfile.ZipFile(latestZip)
# find all zip members in chrome-mac/Chromium.app
members = [m for m in zippedChromium.namelist() if m.startswith('chrome-mac/Chromium.app/')]
#zippedChromium.extract(chromiumAppPath, workingDir)
target = 'chromium-%s' % latestRev
if os.path.isdir(target):
    print 'destination already exists, exiting'
    raise SystemExit(1)
os.makedirs(target)
zippedChromium.extractall(target, members)

lengths = [
    (len(dirnames), len(filenames))
    for dirpath, dirnames, filenames in os.walk(target)
    ]
dirlengths, filelengths = zip(*lengths)
ndirs = sum(dirlengths)
nfiles = sum(filelengths)
print 'extracted %(nfiles)d files in %(ndirs)d dirs' % vars()
#zippedChromium.close()

我运行时得到的输出是

> .\getapp.py
getting revision 48479
extracted 537 files in 184 dirs

Answer 4

从Python中的zip提取.app时还有另一个问题（通常zip实用程序不会发生）。 似乎没有人提到这一点...

由于丢失了嵌套二进制文件上的执行权限位，.app可能会停止以这种方式进行后期提取。 您可以通过简单地再次授予它来解决此问题。

这是我正在使用的一小段代码。 根据您的需要对此进行修改（或编写一个更通用的函数以更通用的方式处理这种情况）：

import os, zipfile
...
ZIP_PATH     = APP_PATH + ".zip" 
APP_BIN_DIR  = os.path.join( APP_PATH, "Contents/MacOS" )
zipfile.ZipFile( ZIP_PATH, 'r' ).extractall( WORK_DIR )   
BIN_PATH = os.path.join( APP_BIN_DIR, os.listdir( APP_BIN_DIR )[0] )
os.chmod( BIN_PATH, 0o777 )

我的程序已经知道可以在哪里找到APP_PATH （即在WORK_DIR ）。 但是我不得不将其拉上拉链，然后把鞋拔掉。 我将zip命名为XXXXX.app.zip 。 我很简单地在这里解析BIN_PATH ，而无需知道.app内部的二进制名称，因为我知道在我的用例中只有一个文件。 我授予它全部（777）权限，因为无论如何我只是在脚本末尾删除.app。