本文整理汇总了Python中tarfile.TarInfo.frombuf方法的典型用法代码示例。如果您正苦于以下问题：Python TarInfo.frombuf方法的具体用法？Python TarInfo.frombuf怎么用？Python TarInfo.frombuf使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类tarfile.TarInfo的用法示例。
在下文中一共展示了TarInfo.frombuf方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: generate_catalog
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def generate_catalog(args, recsize, out=stdout, verbose=0):
out.write(''.join( str(i % 10) for i in xrange(1,recsize) ) + '\n')
args.sort()
recno = 0
errno = 0
for fname in args:
if verbose:
print >>stderr, 'reading: %r...' % fname
name = basename(fname)
if name.endswith('.tar'):
name = name[:-4]
if recsize < (len(name) + 9):
print >>stderr, 'tarfile %r does not fit to the catalog record size.' % fname
errno = 1
continue
name += ' '*(recsize-9-len(name))
missing = 'x'*(recsize-1)
tarfp = file(fname, 'rb')
while 1:
offset = tarfp.tell()
buf = tarfp.read(BLOCKSIZE)
if len(buf) != BLOCKSIZE: break
try:
info = TarInfo.frombuf(buf)
except ValueError:
print >>stderr, '%r: tar record corrputed at offset=%d' % (fname, offset)
errno = 1
break
size = ((info.size + BLOCKSIZE-1) / BLOCKSIZE) * BLOCKSIZE
data = tarfp.read(size)
if len(data) != size:
print >>stderr, '%r: premature eof at offset=%d' % (fname, offset)
errno = 1
break
recid = int(info.name[:8], 16)
if recid < recno:
print >>stderr, '%r: duplicated recno: %d at offset=%d' % (fname, recid, offset)
errno = 1
continue
if recno < recid:
print >>stderr, '%r: missing recno: %d-%d' % (fname, recno, recid-1)
for _ in xrange(recno, recid):
out.write(missing+'\n')
recno = recid
errno = 1
out.write('%08x%s\n' % (offset, name))
recno += 1
tarfp.close()
return errno示例2: get_info
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def get_info(self, recno):
if not self.mode:
raise TarDB.FileError('get_info: not opened: %r' % self)
try:
(name, offset) = self._catalog.get(recno)
except Catalog.InvalidRecord:
raise TarDB.InvalidRecord(recno)
tarfp = self._get_tarfile(name)
tarfp.seek(offset)
buf = tarfp.read(BLOCKSIZE)
if len(buf) != BLOCKSIZE:
raise TarDB.Corrupted('get_info: premature eof in info block: %r, recno=%d, info_offset=%d' % (self, recno, offset))
try:
return TarInfo.frombuf(buf)
except ValueError:
raise TarDB.Corrupted('get_info: tar record corrupted: %r, recno=%d, info_offset=%d' % (self, recno, offset))示例3: get_recinfo
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def get_recinfo(self, recno, data=False):
(idx, offset) = self._get_catent(recno)
if self._ridx != idx:
if self._rtar is not None:
self._rtar.close()
assert idx in self._files
path = os.path.join(self.basedir, self._files[idx])
self._rtar = open(path, mode='rb')
self._ridx = idx
self._rtar.seek(offset)
buf = self._rtar.read(BLOCKSIZE)
info = TarInfo.frombuf(buf, 'utf-8', 'ignore')
if data:
b = self._rtar.read(info.size)
else:
b = None
return (info, b)示例4: generate_labelidx
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def generate_labelidx(args, prefix, verbose=0):
import re, struct
pat = re.compile(r'([0-9a-f]{8})\.(.*)')
valid_labels = re.compile(r'[0-9a-zA-Z]')
labelmap = {}
errno = 0
for fname in args:
if verbose:
print >>stderr, 'reading: %r...' % fname
tarfp = file(fname, 'rb')
while 1:
offset = tarfp.tell()
buf = tarfp.read(BLOCKSIZE)
if len(buf) != BLOCKSIZE: break
try:
info = TarInfo.frombuf(buf)
except ValueError:
print >>stderr, '%r: tar record corrputed at offset=%d' % (fname, offset)
errno = 1
break
size = ((info.size + BLOCKSIZE-1) / BLOCKSIZE) * BLOCKSIZE
data = tarfp.read(size)
if len(data) != size:
print >>stderr, '%r: premature eof at offset=%d' % (fname, offset)
errno = 1
break
m = pat.match(info.name)
if not m:
print >>stderr, '%r: invalid name %r at offset=%d' % (fname, info.name, offset)
errno = 1
continue
(recno, labels) = m.groups()
recno = int(recno, 16)
for label in valid_labels.findall(labels):
if label not in labelmap: labelmap[label] = []
labelmap[label].append(recno)
tarfp.close()
#
for (label,recnos) in labelmap.iteritems():
fname = '%s_%02x' % (prefix, ord(label))
recnos.sort(reverse=True)
data = struct.pack('>%di' % len(recnos), *recnos)
fp = file(fname, 'wb')
fp.write(data)
fp.close()
return errno示例5: _get_catalog
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def _get_catalog(self):
for fname in os.listdir(self.basedir):
try:
idx = self.name2idx(fname)
except ValueError:
continue
try:
fp = file(os.path.join(self.basedir, fname), 'rb')
except IOError, e:
raise TarDB.FileError(e)
while 1:
offset = fp.tell()
buf = fp.read(BLOCKSIZE)
if len(buf) != BLOCKSIZE: break
info = TarInfo.frombuf(buf)
size = ((info.size + BLOCKSIZE-1) / BLOCKSIZE) * BLOCKSIZE
if len(fp.read(size)) != size: break
yield (idx, offset)
fp.close()示例6: get_record
# 需要导入模块: from tarfile import TarInfo [as 别名]
# 或者: from tarfile.TarInfo import frombuf [as 别名]
def get_record(self, recno):
if not self._mode: raise TarDB.FileError('not open: %r' % self)
(idx, offset) = self.get_filepos(recno)
fp = self._get_fp(idx)
try:
fp.open()
except FileLock.Failed, e:
raise TarDB.LockError(e)
fp.seek(offset)
buf = fp.read(BLOCKSIZE)
if len(buf) != BLOCKSIZE:
raise TarDB.Corrupted('get_record: premature eof info: %r, recno=%d, info_offset=%d' %
(self, recno, offset))
try:
info = TarInfo.frombuf(buf)
except ValueError:
raise TarDB.Corrupted('get_record: record corrupted: %r, recno=%d, offset=%d' %
(self, recno, offset))
data = fp.read(info.size)
if len(data) != info.size:
raise TarDB.Corrupted('get_record: premature eof data: %r, recno=%d, info_offset=%d' %
(self, recno, offset))
fp.close()
return (info, data)
def get_info(self, recno):
if not self._mode: raise TarDB.FileError('not open: %r' % self)
(idx, offset) = self.get_filepos(recno)
fp = self._get_fp(idx)
try: