利用python中的gzip模块压缩和解压数据流和文件

直接给出源码实现, 分为两种情况:

1.网络连接中的数据流的压缩和解压,或是打开的文件读取一部分

2.打开文件压缩或是解压

#!/usr/bin/env python
#encoding: utf-8
#filename: gzip_demo.py
#author: [e-mail]
#date: 2015-06-30

import gzip, binascii, os
from cStringIO import StringIO

def gzip_compress(raw_data):
    buf = StringIO()
    f = gzip.GzipFile(mode='wb', fileobj=buf)
    try:
        f.write(raw_data)
    finally:
        f.close()
    return buf.getvalue()

def gzip_uncompress(c_data):
    buf = StringIO(c_data)
    f = gzip.GzipFile(mode = 'rb', fileobj = buf)
    try:
        r_data = f.read()
    finally:
        f.close()
    return r_data


def compress_file(fn_in, fn_out):
    f_in = open(fn_in, 'rb')
    f_out = gzip.open(fn_out, 'wb')
    f_out.writelines(f_in)
    f_out.close()
    f_in.close()

def uncompress_file(fn_in, fn_out):
    f_in = gzip.open(fn_in, 'rb')
    f_out = open(fn_out, 'wb')
    file_content = f_in.read()
    f_out.write(file_content)
    f_out.close()
    f_in.close()


if __name__ == '__main__':
    in_data = 'hello, world!'
    print in_data
    out_data = gzip_compress(in_data)
    print binascii.hexlify(out_data)

    r_data = gzip_uncompress(out_data)
    print r_data

    raw_f = '/opt/log/raw/access.log_HLJYD-ICS-68_20150609040506.old'
    #raw_f = '/home/taoyx/program_develop/python_dev/a.html';

    gzip_f2 = '/opt/log/raw/access.log_HLJYD-ICS-68_20150609040506.gz'
    #gzip_f2 = '/home/taoyx/program_develop/python_dev/log_gz/cpm.access.log-20150225.gz'
    #gzip_f2 = '/home/taoyx/program_develop/python_dev/a.html.1.gz'
    compress_file(raw_f, gzip_f2)

    #gunzip_f = '/home/taoyx/program_develop/python_dev/log_gz/cpm.access.log-20150225.old'
    #gunzip_f = '/home/taoyx/program_develop/python_dev/a.html.1'
    #uncompress_file(gzip_f2, gunzip_f)

请自己修改输入和输出文件路径, 确保相应的文件存在, 取消相应的注释进行测试.

参考文献：

[1].https://docs.python.org/2/library/gzip.html   官网

[2].http://blog.csdn.net/jhonguy/article/details/7867348