本文整理匯總了Python中zipfile._EndRecData方法的典型用法代碼示例。如果您正苦於以下問題：Python zipfile._EndRecData方法的具體用法？Python zipfile._EndRecData怎麽用？Python zipfile._EndRecData使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類zipfile的用法示例。
在下文中一共展示了zipfile._EndRecData方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: extract_wininst_cfg
# 需要導入模塊: import zipfile [as 別名]
# 或者: from zipfile import _EndRecData [as 別名]
def extract_wininst_cfg(dist_filename):
"""Extract configuration data from a bdist_wininst .exe
Returns a configparser.RawConfigParser, or None
"""
f = open(dist_filename, 'rb')
try:
endrec = zipfile._EndRecData(f)
if endrec is None:
return None
prepended = (endrec[9] - endrec[5]) - endrec[6]
if prepended < 12: # no wininst data here
return None
f.seek(prepended - 12)
tag, cfglen, bmlen = struct.unpack("<iii", f.read(12))
if tag not in (0x1234567A, 0x1234567B):
return None # not a valid tag
f.seek(prepended - (12 + cfglen))
cfg = configparser.RawConfigParser(
{'version': '', 'target_version': ''})
try:
part = f.read(cfglen)
# Read up to the first null byte.
config = part.split(b'\0', 1)[0]
# Now the config is in bytes, but for RawConfigParser, it should
# be text, so decode it.
config = config.decode(sys.getfilesystemencoding())
cfg.readfp(six.StringIO(config))
except configparser.Error:
return None
if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
return None
return cfg
finally:
f.close() 示例2: extract_wininst_cfg
# 需要導入模塊: import zipfile [as 別名]
# 或者: from zipfile import _EndRecData [as 別名]
def extract_wininst_cfg(dist_filename):
"""Extract configuration data from a bdist_wininst .exe
Returns a configparser.RawConfigParser, or None
"""
f = open(dist_filename, 'rb')
try:
endrec = zipfile._EndRecData(f)
if endrec is None:
return None
prepended = (endrec[9] - endrec[5]) - endrec[6]
if prepended < 12: # no wininst data here
return None
f.seek(prepended - 12)
tag, cfglen, bmlen = struct.unpack("<iii", f.read(12))
if tag not in (0x1234567A, 0x1234567B):
return None # not a valid tag
f.seek(prepended - (12 + cfglen))
init = {'version': '', 'target_version': ''}
cfg = configparser.RawConfigParser(init)
try:
part = f.read(cfglen)
# Read up to the first null byte.
config = part.split(b'\0', 1)[0]
# Now the config is in bytes, but for RawConfigParser, it should
# be text, so decode it.
config = config.decode(sys.getfilesystemencoding())
cfg.readfp(six.StringIO(config))
except configparser.Error:
return None
if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
return None
return cfg
finally:
f.close() 示例3: get_endrec
# 需要導入模塊: import zipfile [as 別名]
# 或者: from zipfile import _EndRecData [as 別名]
def get_endrec(file):
pos = file.tell()
endrec = _EndRecData(file)
file.seek(pos)
return endrec