下载并在内存中解压缩gzip文件？(Download and decompress gzipped

我想使用的urllib下载文件，并保存之前在内存中的文件解压缩。

这就是我现在所拥有的：

response = urllib2.urlopen(baseURL + filename)
compressedFile = StringIO.StringIO()
compressedFile.write(response.read())
decompressedFile = gzip.GzipFile(fileobj=compressedFile, mode='rb')
outfile = open(outFilePath, 'w')
outfile.write(decompressedFile.read())

这结束了编写空文件。 我如何能实现我追求的？

更新答案：

#! /usr/bin/env python2
import urllib2
import StringIO
import gzip

baseURL = "https://www.kernel.org/pub/linux/docs/man-pages/"
filename = "man-pages-3.34.tar.gz"
outFilePath = filename[:-3]

response = urllib2.urlopen(baseURL + filename)
compressedFile = StringIO.StringIO(response.read())
decompressedFile = gzip.GzipFile(fileobj=compressedFile)

with open(outFilePath, 'w') as outfile:
    outfile.write(decompressedFile.read())

Answer 1:

你需要寻求年初compressedFile写入之后，但它传递给前gzip.GzipFile() 否则，它会从最终读取gzip模块，并会出现一个空文件给它。 见下文：

#! /usr/bin/env python
import urllib2
import StringIO
import gzip

baseURL = "https://www.kernel.org/pub/linux/docs/man-pages/"
filename = "man-pages-3.34.tar.gz"
outFilePath = "man-pages-3.34.tar"

response = urllib2.urlopen(baseURL + filename)
compressedFile = StringIO.StringIO()
compressedFile.write(response.read())
#
# Set the file's current position to the beginning
# of the file so that gzip.GzipFile can read
# its contents from the top.
#
compressedFile.seek(0)

decompressedFile = gzip.GzipFile(fileobj=compressedFile, mode='rb')

with open(outFilePath, 'w') as outfile:
    outfile.write(decompressedFile.read())

Answer 2:

对于使用Python 3的，相当于答案是：

import urllib.request
import io
import gzip

response = urllib.request.urlopen(FILE_URL)
compressed_file = io.BytesIO(response.read())
decompressed_file = gzip.GzipFile(fileobj=compressed_file)

with open(OUTFILE_PATH, 'wb') as outfile:
    outfile.write(decompressed_file.read())

Answer 3:

如果你有Python的3.2以上，生活会更容易：

#!/usr/bin/env python3
import gzip
import urllib.request

baseURL = "https://www.kernel.org/pub/linux/docs/man-pages/"
filename = "man-pages-4.03.tar.gz"
outFilePath = filename[:-3]

response = urllib.request.urlopen(baseURL + filename)
with open(outFilePath, 'wb') as outfile:
    outfile.write(gzip.decompress(response.read()))

对于那些谁是对历史感兴趣，看到https://bugs.python.org/issue3488和https://hg.python.org/cpython/rev/3fa0a9553402 。

Answer 4:

一号线码打印的压缩文件的内容：

print gzip.GzipFile(fileobj=StringIO.StringIO(urllib2.urlopen(DOWNLOAD_LINK).read()), mode='rb').read()

文章来源: Download and decompress gzipped file in memory?