mirror of
https://github.com/python/cpython.git
synced 2025-10-31 05:31:20 +00:00
8c43641271
Also fixes - Issue #1526: Allow more than 64k files to be added to Zip64 file. - Issue #1746: Correct handling of zipfile archive comments (previously archives with comments over 4k were flagged as invalid). Allow writing Zip files with archives by setting the 'comment' attribute of a ZipFile.
1407 lines
52 KiB
Python
1407 lines
52 KiB
Python
"""
|
|
Read and write ZIP files.
|
|
"""
|
|
import struct, os, time, sys, shutil
|
|
import binascii, cStringIO
|
|
|
|
try:
|
|
import zlib # We may need its compression method
|
|
crc32 = zlib.crc32
|
|
except ImportError:
|
|
zlib = None
|
|
crc32 = binascii.crc32
|
|
|
|
__all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",
|
|
"ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile" ]
|
|
|
|
class BadZipfile(Exception):
|
|
pass
|
|
|
|
|
|
class LargeZipFile(Exception):
|
|
"""
|
|
Raised when writing a zipfile, the zipfile requires ZIP64 extensions
|
|
and those extensions are disabled.
|
|
"""
|
|
|
|
error = BadZipfile # The exception raised by this module
|
|
|
|
ZIP64_LIMIT= (1 << 31) - 1
|
|
ZIP_FILECOUNT_LIMIT = 1 << 16
|
|
ZIP_MAX_COMMENT = (1 << 16) - 1
|
|
|
|
# constants for Zip file compression methods
|
|
ZIP_STORED = 0
|
|
ZIP_DEFLATED = 8
|
|
# Other ZIP compression methods not supported
|
|
|
|
# Below are some formats and associated data for reading/writing headers using
|
|
# the struct module. The names and structures of headers/records are those used
|
|
# in the PKWARE description of the ZIP file format:
|
|
# http://www.pkware.com/documents/casestudies/APPNOTE.TXT
|
|
# (URL valid as of January 2008)
|
|
|
|
# The "end of central directory" structure, magic number, size, and indices
|
|
# (section V.I in the format document)
|
|
structEndCentDir = "<4s4H2LH"
|
|
magicEndCentDir = "PK\005\006"
|
|
sizeEndCentDir = struct.calcsize(structEndCentDir)
|
|
|
|
_ECD_SIGNATURE = 0
|
|
_ECD_DISK_NUMBER = 1
|
|
_ECD_DISK_START = 2
|
|
_ECD_ENTRIES_THIS_DISK = 3
|
|
_ECD_ENTRIES_TOTAL = 4
|
|
_ECD_SIZE = 5
|
|
_ECD_OFFSET = 6
|
|
_ECD_COMMENT_SIZE = 7
|
|
# These last two indices are not part of the structure as defined in the
|
|
# spec, but they are used internally by this module as a convenience
|
|
_ECD_COMMENT = 8
|
|
_ECD_LOCATION = 9
|
|
|
|
# The "central directory" structure, magic number, size, and indices
|
|
# of entries in the structure (section V.F in the format document)
|
|
structCentralDir = "<4s4B4HL2L5H2L"
|
|
magicCentralDir = "PK\001\002"
|
|
sizeCentralDir = struct.calcsize(structCentralDir)
|
|
|
|
# The "local file header" structure, magic number, size, and indices
|
|
# (section V.A in the format document)
|
|
structFileHeader = "<4s2B4HL2L2H"
|
|
magicFileHeader = "PK\003\004"
|
|
sizeFileHeader = struct.calcsize(structFileHeader)
|
|
|
|
# The "Zip64 end of central directory locator" structure, magic number, and size
|
|
structEndCentDir64Locator = "<4sLQL"
|
|
magicEndCentDir64Locator = "PK\x06\x07"
|
|
sizeEndCentDir64Locator = struct.calcsize(structEndCentDir64Locator)
|
|
|
|
# The "Zip64 end of central directory" record, magic number, size, and indices
|
|
# (section V.G in the format document)
|
|
structEndCentDir64 = "<4sQ2H2L4Q"
|
|
magicEndCentDir64 = "PK\x06\x06"
|
|
sizeEndCentDir64 = struct.calcsize(structEndCentDir64)
|
|
|
|
_CD64_SIGNATURE = 0
|
|
_CD64_DIRECTORY_RECSIZE = 1
|
|
_CD64_CREATE_VERSION = 2
|
|
_CD64_EXTRACT_VERSION = 3
|
|
_CD64_DISK_NUMBER = 4
|
|
_CD64_DISK_NUMBER_START = 5
|
|
_CD64_NUMBER_ENTRIES_THIS_DISK = 6
|
|
_CD64_NUMBER_ENTRIES_TOTAL = 7
|
|
_CD64_DIRECTORY_SIZE = 8
|
|
_CD64_OFFSET_START_CENTDIR = 9
|
|
|
|
# indexes of entries in the central directory structure
|
|
_CD_SIGNATURE = 0
|
|
_CD_CREATE_VERSION = 1
|
|
_CD_CREATE_SYSTEM = 2
|
|
_CD_EXTRACT_VERSION = 3
|
|
_CD_EXTRACT_SYSTEM = 4
|
|
_CD_FLAG_BITS = 5
|
|
_CD_COMPRESS_TYPE = 6
|
|
_CD_TIME = 7
|
|
_CD_DATE = 8
|
|
_CD_CRC = 9
|
|
_CD_COMPRESSED_SIZE = 10
|
|
_CD_UNCOMPRESSED_SIZE = 11
|
|
_CD_FILENAME_LENGTH = 12
|
|
_CD_EXTRA_FIELD_LENGTH = 13
|
|
_CD_COMMENT_LENGTH = 14
|
|
_CD_DISK_NUMBER_START = 15
|
|
_CD_INTERNAL_FILE_ATTRIBUTES = 16
|
|
_CD_EXTERNAL_FILE_ATTRIBUTES = 17
|
|
_CD_LOCAL_HEADER_OFFSET = 18
|
|
|
|
# The "local file header" structure, magic number, size, and indices
|
|
# (section V.A in the format document)
|
|
structFileHeader = "<4s2B4HL2L2H"
|
|
magicFileHeader = "PK\003\004"
|
|
sizeFileHeader = struct.calcsize(structFileHeader)
|
|
|
|
_FH_SIGNATURE = 0
|
|
_FH_EXTRACT_VERSION = 1
|
|
_FH_EXTRACT_SYSTEM = 2
|
|
_FH_GENERAL_PURPOSE_FLAG_BITS = 3
|
|
_FH_COMPRESSION_METHOD = 4
|
|
_FH_LAST_MOD_TIME = 5
|
|
_FH_LAST_MOD_DATE = 6
|
|
_FH_CRC = 7
|
|
_FH_COMPRESSED_SIZE = 8
|
|
_FH_UNCOMPRESSED_SIZE = 9
|
|
_FH_FILENAME_LENGTH = 10
|
|
_FH_EXTRA_FIELD_LENGTH = 11
|
|
|
|
# The "Zip64 end of central directory locator" structure, magic number, and size
|
|
structEndCentDir64Locator = "<4sLQL"
|
|
magicEndCentDir64Locator = "PK\x06\x07"
|
|
sizeEndCentDir64Locator = struct.calcsize(structEndCentDir64Locator)
|
|
|
|
# The "Zip64 end of central directory" record, magic number, size, and indices
|
|
# (section V.G in the format document)
|
|
structEndCentDir64 = "<4sQ2H2L4Q"
|
|
magicEndCentDir64 = "PK\x06\x06"
|
|
sizeEndCentDir64 = struct.calcsize(structEndCentDir64)
|
|
|
|
_CD64_SIGNATURE = 0
|
|
_CD64_DIRECTORY_RECSIZE = 1
|
|
_CD64_CREATE_VERSION = 2
|
|
_CD64_EXTRACT_VERSION = 3
|
|
_CD64_DISK_NUMBER = 4
|
|
_CD64_DISK_NUMBER_START = 5
|
|
_CD64_NUMBER_ENTRIES_THIS_DISK = 6
|
|
_CD64_NUMBER_ENTRIES_TOTAL = 7
|
|
_CD64_DIRECTORY_SIZE = 8
|
|
_CD64_OFFSET_START_CENTDIR = 9
|
|
|
|
def is_zipfile(filename):
|
|
"""Quickly see if file is a ZIP file by checking the magic number."""
|
|
try:
|
|
fpin = open(filename, "rb")
|
|
endrec = _EndRecData(fpin)
|
|
fpin.close()
|
|
if endrec:
|
|
return True # file has correct magic number
|
|
except IOError:
|
|
pass
|
|
return False
|
|
|
|
def _EndRecData64(fpin, offset, endrec):
|
|
"""
|
|
Read the ZIP64 end-of-archive records and use that to update endrec
|
|
"""
|
|
fpin.seek(offset - sizeEndCentDir64Locator, 2)
|
|
data = fpin.read(sizeEndCentDir64Locator)
|
|
sig, diskno, reloff, disks = struct.unpack(structEndCentDir64Locator, data)
|
|
if sig != magicEndCentDir64Locator:
|
|
return endrec
|
|
|
|
if diskno != 0 or disks != 1:
|
|
raise BadZipfile("zipfiles that span multiple disks are not supported")
|
|
|
|
# Assume no 'zip64 extensible data'
|
|
fpin.seek(offset - sizeEndCentDir64Locator - sizeEndCentDir64, 2)
|
|
data = fpin.read(sizeEndCentDir64)
|
|
sig, sz, create_version, read_version, disk_num, disk_dir, \
|
|
dircount, dircount2, dirsize, diroffset = \
|
|
struct.unpack(structEndCentDir64, data)
|
|
if sig != magicEndCentDir64:
|
|
return endrec
|
|
|
|
# Update the original endrec using data from the ZIP64 record
|
|
endrec[_ECD_DISK_NUMBER] = disk_num
|
|
endrec[_ECD_DISK_START] = disk_dir
|
|
endrec[_ECD_ENTRIES_THIS_DISK] = dircount
|
|
endrec[_ECD_ENTRIES_TOTAL] = dircount2
|
|
endrec[_ECD_SIZE] = dirsize
|
|
endrec[_ECD_OFFSET] = diroffset
|
|
return endrec
|
|
|
|
|
|
def _EndRecData(fpin):
|
|
"""Return data from the "End of Central Directory" record, or None.
|
|
|
|
The data is a list of the nine items in the ZIP "End of central dir"
|
|
record followed by a tenth item, the file seek offset of this record."""
|
|
|
|
# Determine file size
|
|
fpin.seek(0, 2)
|
|
filesize = fpin.tell()
|
|
|
|
# Check to see if this is ZIP file with no archive comment (the
|
|
# "end of central directory" structure should be the last item in the
|
|
# file if this is the case).
|
|
fpin.seek(-sizeEndCentDir, 2)
|
|
data = fpin.read()
|
|
if data[0:4] == magicEndCentDir and data[-2:] == "\000\000":
|
|
# the signature is correct and there's no comment, unpack structure
|
|
endrec = struct.unpack(structEndCentDir, data)
|
|
endrec=list(endrec)
|
|
|
|
# Append a blank comment and record start offset
|
|
endrec.append("")
|
|
endrec.append(filesize - sizeEndCentDir)
|
|
if endrec[_ECD_OFFSET] == 0xffffffff:
|
|
# the value for the "offset of the start of the central directory"
|
|
# indicates that there is a "Zip64 end of central directory"
|
|
# structure present, so go look for it
|
|
return _EndRecData64(fpin, -sizeEndCentDir, endrec)
|
|
|
|
return endrec
|
|
|
|
# Either this is not a ZIP file, or it is a ZIP file with an archive
|
|
# comment. Search the end of the file for the "end of central directory"
|
|
# record signature. The comment is the last item in the ZIP file and may be
|
|
# up to 64K long. It is assumed that the "end of central directory" magic
|
|
# number does not appear in the comment.
|
|
maxCommentStart = max(filesize - (1 << 16) - sizeEndCentDir, 0)
|
|
fpin.seek(maxCommentStart, 0)
|
|
data = fpin.read()
|
|
start = data.rfind(magicEndCentDir)
|
|
if start >= 0:
|
|
# found the magic number; attempt to unpack and interpret
|
|
recData = data[start:start+sizeEndCentDir]
|
|
endrec = list(struct.unpack(structEndCentDir, recData))
|
|
comment = data[start+sizeEndCentDir:]
|
|
# check that comment length is correct
|
|
if endrec[_ECD_COMMENT_SIZE] == len(comment):
|
|
# Append the archive comment and start offset
|
|
endrec.append(comment)
|
|
endrec.append(maxCommentStart + start)
|
|
if endrec[_ECD_OFFSET] == 0xffffffff:
|
|
# There is apparently a "Zip64 end of central directory"
|
|
# structure present, so go look for it
|
|
return _EndRecData64(fpin, start - filesize, endrec)
|
|
return endrec
|
|
|
|
# Unable to find a valid end of central directory structure
|
|
return
|
|
|
|
|
|
class ZipInfo (object):
|
|
"""Class with attributes describing each file in the ZIP archive."""
|
|
|
|
__slots__ = (
|
|
'orig_filename',
|
|
'filename',
|
|
'date_time',
|
|
'compress_type',
|
|
'comment',
|
|
'extra',
|
|
'create_system',
|
|
'create_version',
|
|
'extract_version',
|
|
'reserved',
|
|
'flag_bits',
|
|
'volume',
|
|
'internal_attr',
|
|
'external_attr',
|
|
'header_offset',
|
|
'CRC',
|
|
'compress_size',
|
|
'file_size',
|
|
'_raw_time',
|
|
)
|
|
|
|
def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
|
|
self.orig_filename = filename # Original file name in archive
|
|
|
|
# Terminate the file name at the first null byte. Null bytes in file
|
|
# names are used as tricks by viruses in archives.
|
|
null_byte = filename.find(chr(0))
|
|
if null_byte >= 0:
|
|
filename = filename[0:null_byte]
|
|
# This is used to ensure paths in generated ZIP files always use
|
|
# forward slashes as the directory separator, as required by the
|
|
# ZIP format specification.
|
|
if os.sep != "/" and os.sep in filename:
|
|
filename = filename.replace(os.sep, "/")
|
|
|
|
self.filename = filename # Normalized file name
|
|
self.date_time = date_time # year, month, day, hour, min, sec
|
|
# Standard values:
|
|
self.compress_type = ZIP_STORED # Type of compression for the file
|
|
self.comment = "" # Comment for each file
|
|
self.extra = "" # ZIP extra data
|
|
if sys.platform == 'win32':
|
|
self.create_system = 0 # System which created ZIP archive
|
|
else:
|
|
# Assume everything else is unix-y
|
|
self.create_system = 3 # System which created ZIP archive
|
|
self.create_version = 20 # Version which created ZIP archive
|
|
self.extract_version = 20 # Version needed to extract archive
|
|
self.reserved = 0 # Must be zero
|
|
self.flag_bits = 0 # ZIP flag bits
|
|
self.volume = 0 # Volume number of file header
|
|
self.internal_attr = 0 # Internal attributes
|
|
self.external_attr = 0 # External file attributes
|
|
# Other attributes are set by class ZipFile:
|
|
# header_offset Byte offset to the file header
|
|
# CRC CRC-32 of the uncompressed file
|
|
# compress_size Size of the compressed file
|
|
# file_size Size of the uncompressed file
|
|
|
|
def FileHeader(self):
|
|
"""Return the per-file header as a string."""
|
|
dt = self.date_time
|
|
dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
|
|
dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
|
|
if self.flag_bits & 0x08:
|
|
# Set these to zero because we write them after the file data
|
|
CRC = compress_size = file_size = 0
|
|
else:
|
|
CRC = self.CRC
|
|
compress_size = self.compress_size
|
|
file_size = self.file_size
|
|
|
|
extra = self.extra
|
|
|
|
if file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT:
|
|
# File is larger than what fits into a 4 byte integer,
|
|
# fall back to the ZIP64 extension
|
|
fmt = '<HHQQ'
|
|
extra = extra + struct.pack(fmt,
|
|
1, struct.calcsize(fmt)-4, file_size, compress_size)
|
|
file_size = 0xffffffff
|
|
compress_size = 0xffffffff
|
|
self.extract_version = max(45, self.extract_version)
|
|
self.create_version = max(45, self.extract_version)
|
|
|
|
filename, flag_bits = self._encodeFilenameFlags()
|
|
header = struct.pack(structFileHeader, magicFileHeader,
|
|
self.extract_version, self.reserved, flag_bits,
|
|
self.compress_type, dostime, dosdate, CRC,
|
|
compress_size, file_size,
|
|
len(filename), len(extra))
|
|
return header + filename + extra
|
|
|
|
def _encodeFilenameFlags(self):
|
|
if isinstance(self.filename, unicode):
|
|
try:
|
|
return self.filename.encode('ascii'), self.flag_bits
|
|
except UnicodeEncodeError:
|
|
return self.filename.encode('utf-8'), self.flag_bits | 0x800
|
|
else:
|
|
return self.filename, self.flag_bits
|
|
|
|
def _decodeFilename(self):
|
|
if self.flag_bits & 0x800:
|
|
return self.filename.decode('utf-8')
|
|
else:
|
|
return self.filename
|
|
|
|
def _decodeExtra(self):
|
|
# Try to decode the extra field.
|
|
extra = self.extra
|
|
unpack = struct.unpack
|
|
while extra:
|
|
tp, ln = unpack('<HH', extra[:4])
|
|
if tp == 1:
|
|
if ln >= 24:
|
|
counts = unpack('<QQQ', extra[4:28])
|
|
elif ln == 16:
|
|
counts = unpack('<QQ', extra[4:20])
|
|
elif ln == 8:
|
|
counts = unpack('<Q', extra[4:12])
|
|
elif ln == 0:
|
|
counts = ()
|
|
else:
|
|
raise RuntimeError, "Corrupt extra field %s"%(ln,)
|
|
|
|
idx = 0
|
|
|
|
# ZIP64 extension (large files and/or large archives)
|
|
if self.file_size in (0xffffffffffffffffL, 0xffffffffL):
|
|
self.file_size = counts[idx]
|
|
idx += 1
|
|
|
|
if self.compress_size == 0xFFFFFFFFL:
|
|
self.compress_size = counts[idx]
|
|
idx += 1
|
|
|
|
if self.header_offset == 0xffffffffL:
|
|
old = self.header_offset
|
|
self.header_offset = counts[idx]
|
|
idx+=1
|
|
|
|
extra = extra[ln+4:]
|
|
|
|
|
|
class _ZipDecrypter:
|
|
"""Class to handle decryption of files stored within a ZIP archive.
|
|
|
|
ZIP supports a password-based form of encryption. Even though known
|
|
plaintext attacks have been found against it, it is still useful
|
|
to be able to get data out of such a file.
|
|
|
|
Usage:
|
|
zd = _ZipDecrypter(mypwd)
|
|
plain_char = zd(cypher_char)
|
|
plain_text = map(zd, cypher_text)
|
|
"""
|
|
|
|
def _GenerateCRCTable():
|
|
"""Generate a CRC-32 table.
|
|
|
|
ZIP encryption uses the CRC32 one-byte primitive for scrambling some
|
|
internal keys. We noticed that a direct implementation is faster than
|
|
relying on binascii.crc32().
|
|
"""
|
|
poly = 0xedb88320
|
|
table = [0] * 256
|
|
for i in range(256):
|
|
crc = i
|
|
for j in range(8):
|
|
if crc & 1:
|
|
crc = ((crc >> 1) & 0x7FFFFFFF) ^ poly
|
|
else:
|
|
crc = ((crc >> 1) & 0x7FFFFFFF)
|
|
table[i] = crc
|
|
return table
|
|
crctable = _GenerateCRCTable()
|
|
|
|
def _crc32(self, ch, crc):
|
|
"""Compute the CRC32 primitive on one byte."""
|
|
return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ord(ch)) & 0xff]
|
|
|
|
def __init__(self, pwd):
|
|
self.key0 = 305419896
|
|
self.key1 = 591751049
|
|
self.key2 = 878082192
|
|
for p in pwd:
|
|
self._UpdateKeys(p)
|
|
|
|
def _UpdateKeys(self, c):
|
|
self.key0 = self._crc32(c, self.key0)
|
|
self.key1 = (self.key1 + (self.key0 & 255)) & 4294967295
|
|
self.key1 = (self.key1 * 134775813 + 1) & 4294967295
|
|
self.key2 = self._crc32(chr((self.key1 >> 24) & 255), self.key2)
|
|
|
|
def __call__(self, c):
|
|
"""Decrypt a single character."""
|
|
c = ord(c)
|
|
k = self.key2 | 2
|
|
c = c ^ (((k * (k^1)) >> 8) & 255)
|
|
c = chr(c)
|
|
self._UpdateKeys(c)
|
|
return c
|
|
|
|
class ZipExtFile:
|
|
"""File-like object for reading an archive member.
|
|
Is returned by ZipFile.open().
|
|
"""
|
|
|
|
def __init__(self, fileobj, zipinfo, decrypt=None):
|
|
self.fileobj = fileobj
|
|
self.decrypter = decrypt
|
|
self.bytes_read = 0L
|
|
self.rawbuffer = ''
|
|
self.readbuffer = ''
|
|
self.linebuffer = ''
|
|
self.eof = False
|
|
self.univ_newlines = False
|
|
self.nlSeps = ("\n", )
|
|
self.lastdiscard = ''
|
|
|
|
self.compress_type = zipinfo.compress_type
|
|
self.compress_size = zipinfo.compress_size
|
|
|
|
self.closed = False
|
|
self.mode = "r"
|
|
self.name = zipinfo.filename
|
|
|
|
# read from compressed files in 64k blocks
|
|
self.compreadsize = 64*1024
|
|
if self.compress_type == ZIP_DEFLATED:
|
|
self.dc = zlib.decompressobj(-15)
|
|
|
|
def set_univ_newlines(self, univ_newlines):
|
|
self.univ_newlines = univ_newlines
|
|
|
|
# pick line separator char(s) based on universal newlines flag
|
|
self.nlSeps = ("\n", )
|
|
if self.univ_newlines:
|
|
self.nlSeps = ("\r\n", "\r", "\n")
|
|
|
|
def __iter__(self):
|
|
return self
|
|
|
|
def next(self):
|
|
nextline = self.readline()
|
|
if not nextline:
|
|
raise StopIteration()
|
|
|
|
return nextline
|
|
|
|
def close(self):
|
|
self.closed = True
|
|
|
|
def _checkfornewline(self):
|
|
nl, nllen = -1, -1
|
|
if self.linebuffer:
|
|
# ugly check for cases where half of an \r\n pair was
|
|
# read on the last pass, and the \r was discarded. In this
|
|
# case we just throw away the \n at the start of the buffer.
|
|
if (self.lastdiscard, self.linebuffer[0]) == ('\r','\n'):
|
|
self.linebuffer = self.linebuffer[1:]
|
|
|
|
for sep in self.nlSeps:
|
|
nl = self.linebuffer.find(sep)
|
|
if nl >= 0:
|
|
nllen = len(sep)
|
|
return nl, nllen
|
|
|
|
return nl, nllen
|
|
|
|
def readline(self, size = -1):
|
|
"""Read a line with approx. size. If size is negative,
|
|
read a whole line.
|
|
"""
|
|
if size < 0:
|
|
size = sys.maxint
|
|
elif size == 0:
|
|
return ''
|
|
|
|
# check for a newline already in buffer
|
|
nl, nllen = self._checkfornewline()
|
|
|
|
if nl >= 0:
|
|
# the next line was already in the buffer
|
|
nl = min(nl, size)
|
|
else:
|
|
# no line break in buffer - try to read more
|
|
size -= len(self.linebuffer)
|
|
while nl < 0 and size > 0:
|
|
buf = self.read(min(size, 100))
|
|
if not buf:
|
|
break
|
|
self.linebuffer += buf
|
|
size -= len(buf)
|
|
|
|
# check for a newline in buffer
|
|
nl, nllen = self._checkfornewline()
|
|
|
|
# we either ran out of bytes in the file, or
|
|
# met the specified size limit without finding a newline,
|
|
# so return current buffer
|
|
if nl < 0:
|
|
s = self.linebuffer
|
|
self.linebuffer = ''
|
|
return s
|
|
|
|
buf = self.linebuffer[:nl]
|
|
self.lastdiscard = self.linebuffer[nl:nl + nllen]
|
|
self.linebuffer = self.linebuffer[nl + nllen:]
|
|
|
|
# line is always returned with \n as newline char (except possibly
|
|
# for a final incomplete line in the file, which is handled above).
|
|
return buf + "\n"
|
|
|
|
def readlines(self, sizehint = -1):
|
|
"""Return a list with all (following) lines. The sizehint parameter
|
|
is ignored in this implementation.
|
|
"""
|
|
result = []
|
|
while True:
|
|
line = self.readline()
|
|
if not line: break
|
|
result.append(line)
|
|
return result
|
|
|
|
def read(self, size = None):
|
|
# act like file() obj and return empty string if size is 0
|
|
if size == 0:
|
|
return ''
|
|
|
|
# determine read size
|
|
bytesToRead = self.compress_size - self.bytes_read
|
|
|
|
# adjust read size for encrypted files since the first 12 bytes
|
|
# are for the encryption/password information
|
|
if self.decrypter is not None:
|
|
bytesToRead -= 12
|
|
|
|
if size is not None and size >= 0:
|
|
if self.compress_type == ZIP_STORED:
|
|
lr = len(self.readbuffer)
|
|
bytesToRead = min(bytesToRead, size - lr)
|
|
elif self.compress_type == ZIP_DEFLATED:
|
|
if len(self.readbuffer) > size:
|
|
# the user has requested fewer bytes than we've already
|
|
# pulled through the decompressor; don't read any more
|
|
bytesToRead = 0
|
|
else:
|
|
# user will use up the buffer, so read some more
|
|
lr = len(self.rawbuffer)
|
|
bytesToRead = min(bytesToRead, self.compreadsize - lr)
|
|
|
|
# avoid reading past end of file contents
|
|
if bytesToRead + self.bytes_read > self.compress_size:
|
|
bytesToRead = self.compress_size - self.bytes_read
|
|
|
|
# try to read from file (if necessary)
|
|
if bytesToRead > 0:
|
|
bytes = self.fileobj.read(bytesToRead)
|
|
self.bytes_read += len(bytes)
|
|
self.rawbuffer += bytes
|
|
|
|
# handle contents of raw buffer
|
|
if self.rawbuffer:
|
|
newdata = self.rawbuffer
|
|
self.rawbuffer = ''
|
|
|
|
# decrypt new data if we were given an object to handle that
|
|
if newdata and self.decrypter is not None:
|
|
newdata = ''.join(map(self.decrypter, newdata))
|
|
|
|
# decompress newly read data if necessary
|
|
if newdata and self.compress_type == ZIP_DEFLATED:
|
|
newdata = self.dc.decompress(newdata)
|
|
self.rawbuffer = self.dc.unconsumed_tail
|
|
if self.eof and len(self.rawbuffer) == 0:
|
|
# we're out of raw bytes (both from the file and
|
|
# the local buffer); flush just to make sure the
|
|
# decompressor is done
|
|
newdata += self.dc.flush()
|
|
# prevent decompressor from being used again
|
|
self.dc = None
|
|
|
|
self.readbuffer += newdata
|
|
|
|
|
|
# return what the user asked for
|
|
if size is None or len(self.readbuffer) <= size:
|
|
bytes = self.readbuffer
|
|
self.readbuffer = ''
|
|
else:
|
|
bytes = self.readbuffer[:size]
|
|
self.readbuffer = self.readbuffer[size:]
|
|
|
|
return bytes
|
|
|
|
|
|
class ZipFile:
|
|
""" Class with methods to open, read, write, close, list zip files.
|
|
|
|
z = ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=False)
|
|
|
|
file: Either the path to the file, or a file-like object.
|
|
If it is a path, the file will be opened and closed by ZipFile.
|
|
mode: The mode can be either read "r", write "w" or append "a".
|
|
compression: ZIP_STORED (no compression) or ZIP_DEFLATED (requires zlib).
|
|
allowZip64: if True ZipFile will create files with ZIP64 extensions when
|
|
needed, otherwise it will raise an exception when this would
|
|
be necessary.
|
|
|
|
"""
|
|
|
|
fp = None # Set here since __del__ checks it
|
|
|
|
def __init__(self, file, mode="r", compression=ZIP_STORED, allowZip64=False):
|
|
"""Open the ZIP file with mode read "r", write "w" or append "a"."""
|
|
if mode not in ("r", "w", "a"):
|
|
raise RuntimeError('ZipFile() requires mode "r", "w", or "a"')
|
|
|
|
if compression == ZIP_STORED:
|
|
pass
|
|
elif compression == ZIP_DEFLATED:
|
|
if not zlib:
|
|
raise RuntimeError,\
|
|
"Compression requires the (missing) zlib module"
|
|
else:
|
|
raise RuntimeError, "That compression method is not supported"
|
|
|
|
self._allowZip64 = allowZip64
|
|
self._didModify = False
|
|
self.debug = 0 # Level of printing: 0 through 3
|
|
self.NameToInfo = {} # Find file info given name
|
|
self.filelist = [] # List of ZipInfo instances for archive
|
|
self.compression = compression # Method of compression
|
|
self.mode = key = mode.replace('b', '')[0]
|
|
self.pwd = None
|
|
self.comment = ''
|
|
|
|
# Check if we were passed a file-like object
|
|
if isinstance(file, basestring):
|
|
self._filePassed = 0
|
|
self.filename = file
|
|
modeDict = {'r' : 'rb', 'w': 'wb', 'a' : 'r+b'}
|
|
try:
|
|
self.fp = open(file, modeDict[mode])
|
|
except IOError:
|
|
if mode == 'a':
|
|
mode = key = 'w'
|
|
self.fp = open(file, modeDict[mode])
|
|
else:
|
|
raise
|
|
else:
|
|
self._filePassed = 1
|
|
self.fp = file
|
|
self.filename = getattr(file, 'name', None)
|
|
|
|
if key == 'r':
|
|
self._GetContents()
|
|
elif key == 'w':
|
|
pass
|
|
elif key == 'a':
|
|
try: # See if file is a zip file
|
|
self._RealGetContents()
|
|
# seek to start of directory and overwrite
|
|
self.fp.seek(self.start_dir, 0)
|
|
except BadZipfile: # file is not a zip file, just append
|
|
self.fp.seek(0, 2)
|
|
else:
|
|
if not self._filePassed:
|
|
self.fp.close()
|
|
self.fp = None
|
|
raise RuntimeError, 'Mode must be "r", "w" or "a"'
|
|
|
|
def _GetContents(self):
|
|
"""Read the directory, making sure we close the file if the format
|
|
is bad."""
|
|
try:
|
|
self._RealGetContents()
|
|
except BadZipfile:
|
|
if not self._filePassed:
|
|
self.fp.close()
|
|
self.fp = None
|
|
raise
|
|
|
|
def _RealGetContents(self):
|
|
"""Read in the table of contents for the ZIP file."""
|
|
fp = self.fp
|
|
endrec = _EndRecData(fp)
|
|
if not endrec:
|
|
raise BadZipfile, "File is not a zip file"
|
|
if self.debug > 1:
|
|
print endrec
|
|
size_cd = endrec[_ECD_SIZE] # bytes in central directory
|
|
offset_cd = endrec[_ECD_OFFSET] # offset of central directory
|
|
self.comment = endrec[_ECD_COMMENT] # archive comment
|
|
|
|
# "concat" is zero, unless zip was concatenated to another file
|
|
concat = endrec[_ECD_LOCATION] - size_cd - offset_cd
|
|
if endrec[_ECD_LOCATION] > ZIP64_LIMIT:
|
|
# If the offset of the "End of Central Dir" record requires Zip64
|
|
# extension structures, account for them
|
|
concat -= (sizeEndCentDir64 + sizeEndCentDir64Locator)
|
|
|
|
if self.debug > 2:
|
|
inferred = concat + offset_cd
|
|
print "given, inferred, offset", offset_cd, inferred, concat
|
|
# self.start_dir: Position of start of central directory
|
|
self.start_dir = offset_cd + concat
|
|
fp.seek(self.start_dir, 0)
|
|
data = fp.read(size_cd)
|
|
fp = cStringIO.StringIO(data)
|
|
total = 0
|
|
while total < size_cd:
|
|
centdir = fp.read(sizeCentralDir)
|
|
if centdir[0:4] != magicCentralDir:
|
|
raise BadZipfile, "Bad magic number for central directory"
|
|
centdir = struct.unpack(structCentralDir, centdir)
|
|
if self.debug > 2:
|
|
print centdir
|
|
filename = fp.read(centdir[_CD_FILENAME_LENGTH])
|
|
# Create ZipInfo instance to store file information
|
|
x = ZipInfo(filename)
|
|
x.extra = fp.read(centdir[_CD_EXTRA_FIELD_LENGTH])
|
|
x.comment = fp.read(centdir[_CD_COMMENT_LENGTH])
|
|
x.header_offset = centdir[_CD_LOCAL_HEADER_OFFSET]
|
|
(x.create_version, x.create_system, x.extract_version, x.reserved,
|
|
x.flag_bits, x.compress_type, t, d,
|
|
x.CRC, x.compress_size, x.file_size) = centdir[1:12]
|
|
x.volume, x.internal_attr, x.external_attr = centdir[15:18]
|
|
# Convert date/time code to (year, month, day, hour, min, sec)
|
|
x._raw_time = t
|
|
x.date_time = ( (d>>9)+1980, (d>>5)&0xF, d&0x1F,
|
|
t>>11, (t>>5)&0x3F, (t&0x1F) * 2 )
|
|
|
|
x._decodeExtra()
|
|
x.header_offset = x.header_offset + concat
|
|
x.filename = x._decodeFilename()
|
|
self.filelist.append(x)
|
|
self.NameToInfo[x.filename] = x
|
|
|
|
# update total bytes read from central directory
|
|
total = (total + sizeCentralDir + centdir[_CD_FILENAME_LENGTH]
|
|
+ centdir[_CD_EXTRA_FIELD_LENGTH]
|
|
+ centdir[_CD_COMMENT_LENGTH])
|
|
|
|
if self.debug > 2:
|
|
print "total", total
|
|
|
|
|
|
def namelist(self):
|
|
"""Return a list of file names in the archive."""
|
|
l = []
|
|
for data in self.filelist:
|
|
l.append(data.filename)
|
|
return l
|
|
|
|
def infolist(self):
|
|
"""Return a list of class ZipInfo instances for files in the
|
|
archive."""
|
|
return self.filelist
|
|
|
|
def printdir(self):
|
|
"""Print a table of contents for the zip file."""
|
|
print "%-46s %19s %12s" % ("File Name", "Modified ", "Size")
|
|
for zinfo in self.filelist:
|
|
date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time[:6]
|
|
print "%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size)
|
|
|
|
def testzip(self):
|
|
"""Read all the files and check the CRC."""
|
|
for zinfo in self.filelist:
|
|
try:
|
|
self.read(zinfo.filename) # Check CRC-32
|
|
except BadZipfile:
|
|
return zinfo.filename
|
|
|
|
def getinfo(self, name):
|
|
"""Return the instance of ZipInfo given 'name'."""
|
|
info = self.NameToInfo.get(name)
|
|
if info is None:
|
|
raise KeyError(
|
|
'There is no item named %r in the archive' % name)
|
|
|
|
return info
|
|
|
|
def setpassword(self, pwd):
|
|
"""Set default password for encrypted files."""
|
|
self.pwd = pwd
|
|
|
|
def read(self, name, pwd=None):
|
|
"""Return file bytes (as a string) for name."""
|
|
return self.open(name, "r", pwd).read()
|
|
|
|
def open(self, name, mode="r", pwd=None):
|
|
"""Return file-like object for 'name'."""
|
|
if mode not in ("r", "U", "rU"):
|
|
raise RuntimeError, 'open() requires mode "r", "U", or "rU"'
|
|
if not self.fp:
|
|
raise RuntimeError, \
|
|
"Attempt to read ZIP archive that was already closed"
|
|
|
|
# Only open a new file for instances where we were not
|
|
# given a file object in the constructor
|
|
if self._filePassed:
|
|
zef_file = self.fp
|
|
else:
|
|
zef_file = open(self.filename, 'rb')
|
|
|
|
# Make sure we have an info object
|
|
if isinstance(name, ZipInfo):
|
|
# 'name' is already an info object
|
|
zinfo = name
|
|
else:
|
|
# Get info object for name
|
|
zinfo = self.getinfo(name)
|
|
|
|
zef_file.seek(zinfo.header_offset, 0)
|
|
|
|
# Skip the file header:
|
|
fheader = zef_file.read(sizeFileHeader)
|
|
if fheader[0:4] != magicFileHeader:
|
|
raise BadZipfile, "Bad magic number for file header"
|
|
|
|
fheader = struct.unpack(structFileHeader, fheader)
|
|
fname = zef_file.read(fheader[_FH_FILENAME_LENGTH])
|
|
if fheader[_FH_EXTRA_FIELD_LENGTH]:
|
|
zef_file.read(fheader[_FH_EXTRA_FIELD_LENGTH])
|
|
|
|
if fname != zinfo.orig_filename:
|
|
raise BadZipfile, \
|
|
'File name in directory "%s" and header "%s" differ.' % (
|
|
zinfo.orig_filename, fname)
|
|
|
|
# check for encrypted flag & handle password
|
|
is_encrypted = zinfo.flag_bits & 0x1
|
|
zd = None
|
|
if is_encrypted:
|
|
if not pwd:
|
|
pwd = self.pwd
|
|
if not pwd:
|
|
raise RuntimeError, "File %s is encrypted, " \
|
|
"password required for extraction" % name
|
|
|
|
zd = _ZipDecrypter(pwd)
|
|
# The first 12 bytes in the cypher stream is an encryption header
|
|
# used to strengthen the algorithm. The first 11 bytes are
|
|
# completely random, while the 12th contains the MSB of the CRC,
|
|
# or the MSB of the file time depending on the header type
|
|
# and is used to check the correctness of the password.
|
|
bytes = zef_file.read(12)
|
|
h = map(zd, bytes[0:12])
|
|
if zinfo.flag_bits & 0x8:
|
|
# compare against the file type from extended local headers
|
|
check_byte = (zinfo._raw_time >> 8) & 0xff
|
|
else:
|
|
# compare against the CRC otherwise
|
|
check_byte = (zinfo.CRC >> 24) & 0xff
|
|
if ord(h[11]) != check_byte:
|
|
raise RuntimeError("Bad password for file", name)
|
|
|
|
# build and return a ZipExtFile
|
|
if zd is None:
|
|
zef = ZipExtFile(zef_file, zinfo)
|
|
else:
|
|
zef = ZipExtFile(zef_file, zinfo, zd)
|
|
|
|
# set universal newlines on ZipExtFile if necessary
|
|
if "U" in mode:
|
|
zef.set_univ_newlines(True)
|
|
return zef
|
|
|
|
def extract(self, member, path=None, pwd=None):
|
|
"""Extract a member from the archive to the current working directory,
|
|
using its full name. Its file information is extracted as accurately
|
|
as possible. `member' may be a filename or a ZipInfo object. You can
|
|
specify a different directory using `path'.
|
|
"""
|
|
if not isinstance(member, ZipInfo):
|
|
member = self.getinfo(member)
|
|
|
|
if path is None:
|
|
path = os.getcwd()
|
|
|
|
return self._extract_member(member, path, pwd)
|
|
|
|
def extractall(self, path=None, members=None, pwd=None):
|
|
"""Extract all members from the archive to the current working
|
|
directory. `path' specifies a different directory to extract to.
|
|
`members' is optional and must be a subset of the list returned
|
|
by namelist().
|
|
"""
|
|
if members is None:
|
|
members = self.namelist()
|
|
|
|
for zipinfo in members:
|
|
self.extract(zipinfo, path, pwd)
|
|
|
|
def _extract_member(self, member, targetpath, pwd):
|
|
"""Extract the ZipInfo object 'member' to a physical
|
|
file on the path targetpath.
|
|
"""
|
|
# build the destination pathname, replacing
|
|
# forward slashes to platform specific separators.
|
|
if targetpath[-1:] == "/":
|
|
targetpath = targetpath[:-1]
|
|
|
|
# don't include leading "/" from file name if present
|
|
if os.path.isabs(member.filename):
|
|
targetpath = os.path.join(targetpath, member.filename[1:])
|
|
else:
|
|
targetpath = os.path.join(targetpath, member.filename)
|
|
|
|
targetpath = os.path.normpath(targetpath)
|
|
|
|
# Create all upper directories if necessary.
|
|
upperdirs = os.path.dirname(targetpath)
|
|
if upperdirs and not os.path.exists(upperdirs):
|
|
os.makedirs(upperdirs)
|
|
|
|
source = self.open(member, pwd=pwd)
|
|
target = file(targetpath, "wb")
|
|
shutil.copyfileobj(source, target)
|
|
source.close()
|
|
target.close()
|
|
|
|
return targetpath
|
|
|
|
def _writecheck(self, zinfo):
|
|
"""Check for errors before writing a file to the archive."""
|
|
if zinfo.filename in self.NameToInfo:
|
|
if self.debug: # Warning for duplicate names
|
|
print "Duplicate name:", zinfo.filename
|
|
if self.mode not in ("w", "a"):
|
|
raise RuntimeError, 'write() requires mode "w" or "a"'
|
|
if not self.fp:
|
|
raise RuntimeError, \
|
|
"Attempt to write ZIP archive that was already closed"
|
|
if zinfo.compress_type == ZIP_DEFLATED and not zlib:
|
|
raise RuntimeError, \
|
|
"Compression requires the (missing) zlib module"
|
|
if zinfo.compress_type not in (ZIP_STORED, ZIP_DEFLATED):
|
|
raise RuntimeError, \
|
|
"That compression method is not supported"
|
|
if zinfo.file_size > ZIP64_LIMIT:
|
|
if not self._allowZip64:
|
|
raise LargeZipFile("Filesize would require ZIP64 extensions")
|
|
if zinfo.header_offset > ZIP64_LIMIT:
|
|
if not self._allowZip64:
|
|
raise LargeZipFile("Zipfile size would require ZIP64 extensions")
|
|
|
|
def write(self, filename, arcname=None, compress_type=None):
|
|
"""Put the bytes from filename into the archive under the name
|
|
arcname."""
|
|
if not self.fp:
|
|
raise RuntimeError(
|
|
"Attempt to write to ZIP archive that was already closed")
|
|
|
|
st = os.stat(filename)
|
|
mtime = time.localtime(st.st_mtime)
|
|
date_time = mtime[0:6]
|
|
# Create ZipInfo instance to store file information
|
|
if arcname is None:
|
|
arcname = filename
|
|
arcname = os.path.normpath(os.path.splitdrive(arcname)[1])
|
|
while arcname[0] in (os.sep, os.altsep):
|
|
arcname = arcname[1:]
|
|
zinfo = ZipInfo(arcname, date_time)
|
|
zinfo.external_attr = (st[0] & 0xFFFF) << 16L # Unix attributes
|
|
if compress_type is None:
|
|
zinfo.compress_type = self.compression
|
|
else:
|
|
zinfo.compress_type = compress_type
|
|
|
|
zinfo.file_size = st.st_size
|
|
zinfo.flag_bits = 0x00
|
|
zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
|
|
self._writecheck(zinfo)
|
|
self._didModify = True
|
|
fp = open(filename, "rb")
|
|
# Must overwrite CRC and sizes with correct data later
|
|
zinfo.CRC = CRC = 0
|
|
zinfo.compress_size = compress_size = 0
|
|
zinfo.file_size = file_size = 0
|
|
self.fp.write(zinfo.FileHeader())
|
|
if zinfo.compress_type == ZIP_DEFLATED:
|
|
cmpr = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
zlib.DEFLATED, -15)
|
|
else:
|
|
cmpr = None
|
|
while 1:
|
|
buf = fp.read(1024 * 8)
|
|
if not buf:
|
|
break
|
|
file_size = file_size + len(buf)
|
|
CRC = crc32(buf, CRC) & 0xffffffff
|
|
if cmpr:
|
|
buf = cmpr.compress(buf)
|
|
compress_size = compress_size + len(buf)
|
|
self.fp.write(buf)
|
|
fp.close()
|
|
if cmpr:
|
|
buf = cmpr.flush()
|
|
compress_size = compress_size + len(buf)
|
|
self.fp.write(buf)
|
|
zinfo.compress_size = compress_size
|
|
else:
|
|
zinfo.compress_size = file_size
|
|
zinfo.CRC = CRC
|
|
zinfo.file_size = file_size
|
|
# Seek backwards and write CRC and file sizes
|
|
position = self.fp.tell() # Preserve current position in file
|
|
self.fp.seek(zinfo.header_offset + 14, 0)
|
|
self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
|
|
zinfo.file_size))
|
|
self.fp.seek(position, 0)
|
|
self.filelist.append(zinfo)
|
|
self.NameToInfo[zinfo.filename] = zinfo
|
|
|
|
def writestr(self, zinfo_or_arcname, bytes):
|
|
"""Write a file into the archive. The contents is the string
|
|
'bytes'. 'zinfo_or_arcname' is either a ZipInfo instance or
|
|
the name of the file in the archive."""
|
|
if not isinstance(zinfo_or_arcname, ZipInfo):
|
|
zinfo = ZipInfo(filename=zinfo_or_arcname,
|
|
date_time=time.localtime(time.time())[:6])
|
|
zinfo.compress_type = self.compression
|
|
else:
|
|
zinfo = zinfo_or_arcname
|
|
|
|
if not self.fp:
|
|
raise RuntimeError(
|
|
"Attempt to write to ZIP archive that was already closed")
|
|
|
|
zinfo.file_size = len(bytes) # Uncompressed size
|
|
zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
self._writecheck(zinfo)
|
|
self._didModify = True
|
|
zinfo.CRC = crc32(bytes) & 0xffffffff # CRC-32 checksum
|
|
if zinfo.compress_type == ZIP_DEFLATED:
|
|
co = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
zlib.DEFLATED, -15)
|
|
bytes = co.compress(bytes) + co.flush()
|
|
zinfo.compress_size = len(bytes) # Compressed size
|
|
else:
|
|
zinfo.compress_size = zinfo.file_size
|
|
zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
self.fp.write(zinfo.FileHeader())
|
|
self.fp.write(bytes)
|
|
self.fp.flush()
|
|
if zinfo.flag_bits & 0x08:
|
|
# Write CRC and file sizes after the file data
|
|
self.fp.write(struct.pack("<lLL", zinfo.CRC, zinfo.compress_size,
|
|
zinfo.file_size))
|
|
self.filelist.append(zinfo)
|
|
self.NameToInfo[zinfo.filename] = zinfo
|
|
|
|
def __del__(self):
|
|
"""Call the "close()" method in case the user forgot."""
|
|
self.close()
|
|
|
|
def close(self):
|
|
"""Close the file, and for mode "w" and "a" write the ending
|
|
records."""
|
|
if self.fp is None:
|
|
return
|
|
|
|
if self.mode in ("w", "a") and self._didModify: # write ending records
|
|
count = 0
|
|
pos1 = self.fp.tell()
|
|
for zinfo in self.filelist: # write central directory
|
|
count = count + 1
|
|
dt = zinfo.date_time
|
|
dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
|
|
dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
|
|
extra = []
|
|
if zinfo.file_size > ZIP64_LIMIT \
|
|
or zinfo.compress_size > ZIP64_LIMIT:
|
|
extra.append(zinfo.file_size)
|
|
extra.append(zinfo.compress_size)
|
|
file_size = 0xffffffff
|
|
compress_size = 0xffffffff
|
|
else:
|
|
file_size = zinfo.file_size
|
|
compress_size = zinfo.compress_size
|
|
|
|
if zinfo.header_offset > ZIP64_LIMIT:
|
|
extra.append(zinfo.header_offset)
|
|
header_offset = 0xffffffffL
|
|
else:
|
|
header_offset = zinfo.header_offset
|
|
|
|
extra_data = zinfo.extra
|
|
if extra:
|
|
# Append a ZIP64 field to the extra's
|
|
extra_data = struct.pack(
|
|
'<HH' + 'Q'*len(extra),
|
|
1, 8*len(extra), *extra) + extra_data
|
|
|
|
extract_version = max(45, zinfo.extract_version)
|
|
create_version = max(45, zinfo.create_version)
|
|
else:
|
|
extract_version = zinfo.extract_version
|
|
create_version = zinfo.create_version
|
|
|
|
try:
|
|
filename, flag_bits = zinfo._encodeFilenameFlags()
|
|
centdir = struct.pack(structCentralDir,
|
|
magicCentralDir, create_version,
|
|
zinfo.create_system, extract_version, zinfo.reserved,
|
|
flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
zinfo.CRC, compress_size, file_size,
|
|
len(filename), len(extra_data), len(zinfo.comment),
|
|
0, zinfo.internal_attr, zinfo.external_attr,
|
|
header_offset)
|
|
except DeprecationWarning:
|
|
print >>sys.stderr, (structCentralDir,
|
|
stringCentralDir, create_version,
|
|
zinfo.create_system, extract_version, zinfo.reserved,
|
|
zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
zinfo.CRC, compress_size, file_size,
|
|
len(zinfo.filename), len(extra_data), len(zinfo.comment),
|
|
0, zinfo.internal_attr, zinfo.external_attr,
|
|
header_offset)
|
|
raise
|
|
self.fp.write(centdir)
|
|
self.fp.write(filename)
|
|
self.fp.write(extra_data)
|
|
self.fp.write(zinfo.comment)
|
|
|
|
pos2 = self.fp.tell()
|
|
# Write end-of-zip-archive record
|
|
centDirOffset = pos1
|
|
if pos1 > ZIP64_LIMIT:
|
|
# Need to write the ZIP64 end-of-archive records
|
|
zip64endrec = struct.pack(
|
|
structEndCentDir64, magicEndCentDir64,
|
|
44, 45, 45, 0, 0, count, count, pos2 - pos1, pos1)
|
|
self.fp.write(zip64endrec)
|
|
|
|
zip64locrec = struct.pack(
|
|
structEndCentDir64Locator,
|
|
magicEndCentDir64Locator, 0, pos2, 1)
|
|
self.fp.write(zip64locrec)
|
|
centDirOffset = 0xFFFFFFFF
|
|
|
|
# check for valid comment length
|
|
if len(self.comment) >= ZIP_MAX_COMMENT:
|
|
if self.debug > 0:
|
|
msg = 'Archive comment is too long; truncating to %d bytes' \
|
|
% ZIP_MAX_COMMENT
|
|
self.comment = self.comment[:ZIP_MAX_COMMENT]
|
|
|
|
endrec = struct.pack(structEndCentDir, magicEndCentDir,
|
|
0, 0, count % ZIP_FILECOUNT_LIMIT,
|
|
count % ZIP_FILECOUNT_LIMIT, pos2 - pos1,
|
|
centDirOffset, len(self.comment))
|
|
self.fp.write(endrec)
|
|
self.fp.write(self.comment)
|
|
self.fp.flush()
|
|
|
|
if not self._filePassed:
|
|
self.fp.close()
|
|
self.fp = None
|
|
|
|
|
|
class PyZipFile(ZipFile):
|
|
"""Class to create ZIP archives with Python library files and packages."""
|
|
|
|
def writepy(self, pathname, basename = ""):
|
|
"""Add all files from "pathname" to the ZIP archive.
|
|
|
|
If pathname is a package directory, search the directory and
|
|
all package subdirectories recursively for all *.py and enter
|
|
the modules into the archive. If pathname is a plain
|
|
directory, listdir *.py and enter all modules. Else, pathname
|
|
must be a Python *.py file and the module will be put into the
|
|
archive. Added modules are always module.pyo or module.pyc.
|
|
This method will compile the module.py into module.pyc if
|
|
necessary.
|
|
"""
|
|
dir, name = os.path.split(pathname)
|
|
if os.path.isdir(pathname):
|
|
initname = os.path.join(pathname, "__init__.py")
|
|
if os.path.isfile(initname):
|
|
# This is a package directory, add it
|
|
if basename:
|
|
basename = "%s/%s" % (basename, name)
|
|
else:
|
|
basename = name
|
|
if self.debug:
|
|
print "Adding package in", pathname, "as", basename
|
|
fname, arcname = self._get_codename(initname[0:-3], basename)
|
|
if self.debug:
|
|
print "Adding", arcname
|
|
self.write(fname, arcname)
|
|
dirlist = os.listdir(pathname)
|
|
dirlist.remove("__init__.py")
|
|
# Add all *.py files and package subdirectories
|
|
for filename in dirlist:
|
|
path = os.path.join(pathname, filename)
|
|
root, ext = os.path.splitext(filename)
|
|
if os.path.isdir(path):
|
|
if os.path.isfile(os.path.join(path, "__init__.py")):
|
|
# This is a package directory, add it
|
|
self.writepy(path, basename) # Recursive call
|
|
elif ext == ".py":
|
|
fname, arcname = self._get_codename(path[0:-3],
|
|
basename)
|
|
if self.debug:
|
|
print "Adding", arcname
|
|
self.write(fname, arcname)
|
|
else:
|
|
# This is NOT a package directory, add its files at top level
|
|
if self.debug:
|
|
print "Adding files from directory", pathname
|
|
for filename in os.listdir(pathname):
|
|
path = os.path.join(pathname, filename)
|
|
root, ext = os.path.splitext(filename)
|
|
if ext == ".py":
|
|
fname, arcname = self._get_codename(path[0:-3],
|
|
basename)
|
|
if self.debug:
|
|
print "Adding", arcname
|
|
self.write(fname, arcname)
|
|
else:
|
|
if pathname[-3:] != ".py":
|
|
raise RuntimeError, \
|
|
'Files added with writepy() must end with ".py"'
|
|
fname, arcname = self._get_codename(pathname[0:-3], basename)
|
|
if self.debug:
|
|
print "Adding file", arcname
|
|
self.write(fname, arcname)
|
|
|
|
def _get_codename(self, pathname, basename):
|
|
"""Return (filename, archivename) for the path.
|
|
|
|
Given a module name path, return the correct file path and
|
|
archive name, compiling if necessary. For example, given
|
|
/python/lib/string, return (/python/lib/string.pyc, string).
|
|
"""
|
|
file_py = pathname + ".py"
|
|
file_pyc = pathname + ".pyc"
|
|
file_pyo = pathname + ".pyo"
|
|
if os.path.isfile(file_pyo) and \
|
|
os.stat(file_pyo).st_mtime >= os.stat(file_py).st_mtime:
|
|
fname = file_pyo # Use .pyo file
|
|
elif not os.path.isfile(file_pyc) or \
|
|
os.stat(file_pyc).st_mtime < os.stat(file_py).st_mtime:
|
|
import py_compile
|
|
if self.debug:
|
|
print "Compiling", file_py
|
|
try:
|
|
py_compile.compile(file_py, file_pyc, None, True)
|
|
except py_compile.PyCompileError,err:
|
|
print err.msg
|
|
fname = file_pyc
|
|
else:
|
|
fname = file_pyc
|
|
archivename = os.path.split(fname)[1]
|
|
if basename:
|
|
archivename = "%s/%s" % (basename, archivename)
|
|
return (fname, archivename)
|
|
|
|
|
|
def main(args = None):
|
|
import textwrap
|
|
USAGE=textwrap.dedent("""\
|
|
Usage:
|
|
zipfile.py -l zipfile.zip # Show listing of a zipfile
|
|
zipfile.py -t zipfile.zip # Test if a zipfile is valid
|
|
zipfile.py -e zipfile.zip target # Extract zipfile into target dir
|
|
zipfile.py -c zipfile.zip src ... # Create zipfile from sources
|
|
""")
|
|
if args is None:
|
|
args = sys.argv[1:]
|
|
|
|
if not args or args[0] not in ('-l', '-c', '-e', '-t'):
|
|
print USAGE
|
|
sys.exit(1)
|
|
|
|
if args[0] == '-l':
|
|
if len(args) != 2:
|
|
print USAGE
|
|
sys.exit(1)
|
|
zf = ZipFile(args[1], 'r')
|
|
zf.printdir()
|
|
zf.close()
|
|
|
|
elif args[0] == '-t':
|
|
if len(args) != 2:
|
|
print USAGE
|
|
sys.exit(1)
|
|
zf = ZipFile(args[1], 'r')
|
|
zf.testzip()
|
|
print "Done testing"
|
|
|
|
elif args[0] == '-e':
|
|
if len(args) != 3:
|
|
print USAGE
|
|
sys.exit(1)
|
|
|
|
zf = ZipFile(args[1], 'r')
|
|
out = args[2]
|
|
for path in zf.namelist():
|
|
if path.startswith('./'):
|
|
tgt = os.path.join(out, path[2:])
|
|
else:
|
|
tgt = os.path.join(out, path)
|
|
|
|
tgtdir = os.path.dirname(tgt)
|
|
if not os.path.exists(tgtdir):
|
|
os.makedirs(tgtdir)
|
|
fp = open(tgt, 'wb')
|
|
fp.write(zf.read(path))
|
|
fp.close()
|
|
zf.close()
|
|
|
|
elif args[0] == '-c':
|
|
if len(args) < 3:
|
|
print USAGE
|
|
sys.exit(1)
|
|
|
|
def addToZip(zf, path, zippath):
|
|
if os.path.isfile(path):
|
|
zf.write(path, zippath, ZIP_DEFLATED)
|
|
elif os.path.isdir(path):
|
|
for nm in os.listdir(path):
|
|
addToZip(zf,
|
|
os.path.join(path, nm), os.path.join(zippath, nm))
|
|
# else: ignore
|
|
|
|
zf = ZipFile(args[1], 'w', allowZip64=True)
|
|
for src in args[2:]:
|
|
addToZip(zf, src, os.path.basename(src))
|
|
|
|
zf.close()
|
|
|
|
if __name__ == "__main__":
|
|
main()
|