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@@ -0,0 +1,1448 @@
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+"""
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+Read and write ZIP files.
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+"""
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+import struct, os, time, sys, shutil
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+import binascii, cStringIO, stat
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+import io
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+import re
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+
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+try:
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+ import zlib # We may need its compression method
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+ crc32 = zlib.crc32
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+except ImportError:
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+ zlib = None
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+ crc32 = binascii.crc32
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+
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+__all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",
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+ "ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile" ]
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+
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+class BadZipfile(Exception):
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+ pass
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+
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+
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+class LargeZipFile(Exception):
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+ """
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+ Raised when writing a zipfile, the zipfile requires ZIP64 extensions
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+ and those extensions are disabled.
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+ """
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+
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+error = BadZipfile # The exception raised by this module
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+
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+ZIP64_LIMIT = (1 << 31) - 1
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+ZIP_FILECOUNT_LIMIT = 1 << 16
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+ZIP_MAX_COMMENT = (1 << 16) - 1
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+
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+# constants for Zip file compression methods
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+ZIP_STORED = 0
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+ZIP_DEFLATED = 8
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+# Other ZIP compression methods not supported
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+
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+# Below are some formats and associated data for reading/writing headers using
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+# the struct module. The names and structures of headers/records are those used
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+# in the PKWARE description of the ZIP file format:
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+# http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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+# (URL valid as of January 2008)
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+
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+# The "end of central directory" structure, magic number, size, and indices
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+# (section V.I in the format document)
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+structEndArchive = "<4s4H2LH"
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+stringEndArchive = "PK\005\006"
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+sizeEndCentDir = struct.calcsize(structEndArchive)
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+
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+_ECD_SIGNATURE = 0
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+_ECD_DISK_NUMBER = 1
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+_ECD_DISK_START = 2
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+_ECD_ENTRIES_THIS_DISK = 3
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+_ECD_ENTRIES_TOTAL = 4
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+_ECD_SIZE = 5
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+_ECD_OFFSET = 6
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+_ECD_COMMENT_SIZE = 7
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+# These last two indices are not part of the structure as defined in the
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+# spec, but they are used internally by this module as a convenience
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+_ECD_COMMENT = 8
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+_ECD_LOCATION = 9
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+
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+# The "central directory" structure, magic number, size, and indices
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+# of entries in the structure (section V.F in the format document)
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+structCentralDir = "<4s4B4HL2L5H2L"
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+stringCentralDir = "PK\001\002"
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+sizeCentralDir = struct.calcsize(structCentralDir)
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+
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+# indexes of entries in the central directory structure
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+_CD_SIGNATURE = 0
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+_CD_CREATE_VERSION = 1
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+_CD_CREATE_SYSTEM = 2
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+_CD_EXTRACT_VERSION = 3
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+_CD_EXTRACT_SYSTEM = 4
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+_CD_FLAG_BITS = 5
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+_CD_COMPRESS_TYPE = 6
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+_CD_TIME = 7
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+_CD_DATE = 8
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+_CD_CRC = 9
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+_CD_COMPRESSED_SIZE = 10
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+_CD_UNCOMPRESSED_SIZE = 11
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+_CD_FILENAME_LENGTH = 12
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+_CD_EXTRA_FIELD_LENGTH = 13
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+_CD_COMMENT_LENGTH = 14
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+_CD_DISK_NUMBER_START = 15
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+_CD_INTERNAL_FILE_ATTRIBUTES = 16
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+_CD_EXTERNAL_FILE_ATTRIBUTES = 17
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+_CD_LOCAL_HEADER_OFFSET = 18
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+
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+# The "local file header" structure, magic number, size, and indices
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+# (section V.A in the format document)
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+structFileHeader = "<4s2B4HL2L2H"
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+stringFileHeader = "PK\003\004"
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+sizeFileHeader = struct.calcsize(structFileHeader)
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+
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+_FH_SIGNATURE = 0
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+_FH_EXTRACT_VERSION = 1
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+_FH_EXTRACT_SYSTEM = 2
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+_FH_GENERAL_PURPOSE_FLAG_BITS = 3
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+_FH_COMPRESSION_METHOD = 4
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+_FH_LAST_MOD_TIME = 5
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+_FH_LAST_MOD_DATE = 6
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+_FH_CRC = 7
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+_FH_COMPRESSED_SIZE = 8
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+_FH_UNCOMPRESSED_SIZE = 9
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+_FH_FILENAME_LENGTH = 10
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+_FH_EXTRA_FIELD_LENGTH = 11
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+
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+# The "Zip64 end of central directory locator" structure, magic number, and size
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+structEndArchive64Locator = "<4sLQL"
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+stringEndArchive64Locator = "PK\x06\x07"
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+sizeEndCentDir64Locator = struct.calcsize(structEndArchive64Locator)
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+
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+# The "Zip64 end of central directory" record, magic number, size, and indices
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+# (section V.G in the format document)
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+structEndArchive64 = "<4sQ2H2L4Q"
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+stringEndArchive64 = "PK\x06\x06"
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+sizeEndCentDir64 = struct.calcsize(structEndArchive64)
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+
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+_CD64_SIGNATURE = 0
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+_CD64_DIRECTORY_RECSIZE = 1
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+_CD64_CREATE_VERSION = 2
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+_CD64_EXTRACT_VERSION = 3
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+_CD64_DISK_NUMBER = 4
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+_CD64_DISK_NUMBER_START = 5
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+_CD64_NUMBER_ENTRIES_THIS_DISK = 6
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+_CD64_NUMBER_ENTRIES_TOTAL = 7
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+_CD64_DIRECTORY_SIZE = 8
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+_CD64_OFFSET_START_CENTDIR = 9
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+
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+def _check_zipfile(fp):
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+ try:
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+ if _EndRecData(fp):
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+ return True # file has correct magic number
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+ except IOError:
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+ pass
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+ return False
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+
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+def is_zipfile(filename):
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+ """Quickly see if a file is a ZIP file by checking the magic number.
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+
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+ The filename argument may be a file or file-like object too.
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+ """
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+ result = False
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+ try:
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+ if hasattr(filename, "read"):
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+ result = _check_zipfile(fp=filename)
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+ else:
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+ with open(filename, "rb") as fp:
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+ result = _check_zipfile(fp)
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+ except IOError:
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+ pass
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+ return result
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+
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+def _EndRecData64(fpin, offset, endrec):
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+ """
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+ Read the ZIP64 end-of-archive records and use that to update endrec
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+ """
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+ try:
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+ fpin.seek(offset - sizeEndCentDir64Locator, 2)
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+ except IOError:
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+ # If the seek fails, the file is not large enough to contain a ZIP64
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+ # end-of-archive record, so just return the end record we were given.
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+ return endrec
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+
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+ data = fpin.read(sizeEndCentDir64Locator)
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+ sig, diskno, reloff, disks = struct.unpack(structEndArchive64Locator, data)
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+ if sig != stringEndArchive64Locator:
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+ return endrec
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+
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+ if diskno != 0 or disks != 1:
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+ raise BadZipfile("zipfiles that span multiple disks are not supported")
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+
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+ # Assume no 'zip64 extensible data'
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+ fpin.seek(offset - sizeEndCentDir64Locator - sizeEndCentDir64, 2)
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+ data = fpin.read(sizeEndCentDir64)
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+ sig, sz, create_version, read_version, disk_num, disk_dir, \
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+ dircount, dircount2, dirsize, diroffset = \
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+ struct.unpack(structEndArchive64, data)
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+ if sig != stringEndArchive64:
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+ return endrec
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+
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+ # Update the original endrec using data from the ZIP64 record
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+ endrec[_ECD_SIGNATURE] = sig
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+ endrec[_ECD_DISK_NUMBER] = disk_num
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+ endrec[_ECD_DISK_START] = disk_dir
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+ endrec[_ECD_ENTRIES_THIS_DISK] = dircount
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+ endrec[_ECD_ENTRIES_TOTAL] = dircount2
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+ endrec[_ECD_SIZE] = dirsize
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+ endrec[_ECD_OFFSET] = diroffset
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+ return endrec
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+
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+
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+def _EndRecData(fpin):
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+ """Return data from the "End of Central Directory" record, or None.
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+
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+ The data is a list of the nine items in the ZIP "End of central dir"
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+ record followed by a tenth item, the file seek offset of this record."""
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+
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+ # Determine file size
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+ fpin.seek(0, 2)
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+ filesize = fpin.tell()
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+
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+ # Check to see if this is ZIP file with no archive comment (the
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+ # "end of central directory" structure should be the last item in the
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+ # file if this is the case).
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+ try:
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+ fpin.seek(-sizeEndCentDir, 2)
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+ except IOError:
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+ return None
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+ data = fpin.read()
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+ if data[0:4] == stringEndArchive and data[-2:] == "\000\000":
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+ # the signature is correct and there's no comment, unpack structure
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+ endrec = struct.unpack(structEndArchive, data)
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+ endrec=list(endrec)
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+
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+ # Append a blank comment and record start offset
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+ endrec.append("")
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+ endrec.append(filesize - sizeEndCentDir)
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+
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+ # Try to read the "Zip64 end of central directory" structure
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+ return _EndRecData64(fpin, -sizeEndCentDir, endrec)
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+
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+ # Either this is not a ZIP file, or it is a ZIP file with an archive
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+ # comment. Search the end of the file for the "end of central directory"
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+ # record signature. The comment is the last item in the ZIP file and may be
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+ # up to 64K long. It is assumed that the "end of central directory" magic
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+ # number does not appear in the comment.
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+ maxCommentStart = max(filesize - (1 << 16) - sizeEndCentDir, 0)
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+ fpin.seek(maxCommentStart, 0)
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+ data = fpin.read()
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+ start = data.rfind(stringEndArchive)
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+ if start >= 0:
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+ # found the magic number; attempt to unpack and interpret
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+ recData = data[start:start+sizeEndCentDir]
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+ endrec = list(struct.unpack(structEndArchive, recData))
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+ commentSize = endrec[_ECD_COMMENT_SIZE] #as claimed by the zip file
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+ comment = data[start+sizeEndCentDir:start+sizeEndCentDir+commentSize]
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+ endrec.append(comment)
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+ endrec.append(maxCommentStart + start)
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+
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+ # Try to read the "Zip64 end of central directory" structure
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+ return _EndRecData64(fpin, maxCommentStart + start - filesize,
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+ endrec)
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+
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+ # Unable to find a valid end of central directory structure
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+ return
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+
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+
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+class ZipInfo (object):
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+ """Class with attributes describing each file in the ZIP archive."""
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+
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+ __slots__ = (
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+ 'orig_filename',
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+ 'filename',
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+ 'date_time',
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+ 'compress_type',
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+ 'comment',
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+ 'extra',
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+ 'create_system',
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+ 'create_version',
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+ 'extract_version',
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+ 'reserved',
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+ 'flag_bits',
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+ 'volume',
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+ 'internal_attr',
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+ 'external_attr',
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+ 'header_offset',
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+ 'CRC',
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+ 'compress_size',
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+ 'file_size',
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+ '_raw_time',
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+ )
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+
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+ def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
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+ self.orig_filename = filename # Original file name in archive
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+
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+ # Terminate the file name at the first null byte. Null bytes in file
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+ # names are used as tricks by viruses in archives.
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+ null_byte = filename.find(chr(0))
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+ if null_byte >= 0:
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+ filename = filename[0:null_byte]
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+ # This is used to ensure paths in generated ZIP files always use
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+ # forward slashes as the directory separator, as required by the
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+ # ZIP format specification.
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+ if os.sep != "/" and os.sep in filename:
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+ filename = filename.replace(os.sep, "/")
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+
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+ self.filename = filename # Normalized file name
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+ self.date_time = date_time # year, month, day, hour, min, sec
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+
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+ if date_time[0] < 1980:
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+ raise ValueError('ZIP does not support timestamps before 1980')
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+
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+ # Standard values:
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+ self.compress_type = ZIP_STORED # Type of compression for the file
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+ self.comment = "" # Comment for each file
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+ self.extra = "" # ZIP extra data
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+ if sys.platform == 'win32':
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+ self.create_system = 0 # System which created ZIP archive
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+ else:
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+ # Assume everything else is unix-y
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+ self.create_system = 3 # System which created ZIP archive
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+ self.create_version = 20 # Version which created ZIP archive
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+ self.extract_version = 20 # Version needed to extract archive
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+ self.reserved = 0 # Must be zero
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+ self.flag_bits = 0 # ZIP flag bits
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+ self.volume = 0 # Volume number of file header
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+ self.internal_attr = 0 # Internal attributes
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+ self.external_attr = 0 # External file attributes
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+ # Other attributes are set by class ZipFile:
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+ # header_offset Byte offset to the file header
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+ # CRC CRC-32 of the uncompressed file
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+ # compress_size Size of the compressed file
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+ # file_size Size of the uncompressed file
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+
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+ def FileHeader(self):
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+ """Return the per-file header as a string."""
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+ dt = self.date_time
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+ dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
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+ dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
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+ if self.flag_bits & 0x08:
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+ # Set these to zero because we write them after the file data
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+ CRC = compress_size = file_size = 0
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+ else:
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+ CRC = self.CRC
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+ compress_size = self.compress_size
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+ file_size = self.file_size
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+
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+ extra = self.extra
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+
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+ if file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT:
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+ # File is larger than what fits into a 4 byte integer,
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+ # fall back to the ZIP64 extension
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+ fmt = '<HHQQ'
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+ extra = extra + struct.pack(fmt,
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+ 1, struct.calcsize(fmt)-4, file_size, compress_size)
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+ file_size = 0xffffffff
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+ compress_size = 0xffffffff
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+ self.extract_version = max(45, self.extract_version)
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+ self.create_version = max(45, self.extract_version)
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+
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+ filename, flag_bits = self._encodeFilenameFlags()
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+ header = struct.pack(structFileHeader, stringFileHeader,
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+ self.extract_version, self.reserved, flag_bits,
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+ self.compress_type, dostime, dosdate, CRC,
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+ compress_size, file_size,
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+ len(filename), len(extra))
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+ return header + filename + extra
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+
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+ def _encodeFilenameFlags(self):
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+ if isinstance(self.filename, unicode):
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+ try:
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+ return self.filename.encode('ascii'), self.flag_bits
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+ except UnicodeEncodeError:
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+ return self.filename.encode('utf-8'), self.flag_bits | 0x800
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+ else:
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+ return self.filename, self.flag_bits
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+
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+ def _decodeFilename(self):
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+ if self.flag_bits & 0x800:
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+ return self.filename.decode('utf-8')
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+ else:
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+ return self.filename
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+
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+ def _decodeExtra(self):
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+ # Try to decode the extra field.
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+ extra = self.extra
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+ unpack = struct.unpack
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+ while extra:
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+ tp, ln = unpack('<HH', extra[:4])
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+ if tp == 1:
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+ if ln >= 24:
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+ counts = unpack('<QQQ', extra[4:28])
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+ elif ln == 16:
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+ counts = unpack('<QQ', extra[4:20])
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+ elif ln == 8:
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+ counts = unpack('<Q', extra[4:12])
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+ elif ln == 0:
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+ counts = ()
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+ else:
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+ raise RuntimeError, "Corrupt extra field %s"%(ln,)
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+
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+ idx = 0
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+
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+ # ZIP64 extension (large files and/or large archives)
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+ if self.file_size in (0xffffffffffffffffL, 0xffffffffL):
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+ self.file_size = counts[idx]
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+ idx += 1
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+
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|
|
+ 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(io.BufferedIOBase):
|
|
|
+ """File-like object for reading an archive member.
|
|
|
+ Is returned by ZipFile.open().
|
|
|
+ """
|
|
|
+
|
|
|
+ # Max size supported by decompressor.
|
|
|
+ MAX_N = 1 << 31 - 1
|
|
|
+
|
|
|
+ # Read from compressed files in 4k blocks.
|
|
|
+ MIN_READ_SIZE = 4096
|
|
|
+
|
|
|
+ # Search for universal newlines or line chunks.
|
|
|
+ PATTERN = re.compile(r'^(?P<chunk>[^\r\n]+)|(?P<newline>\n|\r\n?)')
|
|
|
+
|
|
|
+ def __init__(self, fileobj, mode, zipinfo, decrypter=None):
|
|
|
+ self._fileobj = fileobj
|
|
|
+ self._decrypter = decrypter
|
|
|
+
|
|
|
+ self._compress_type = zipinfo.compress_type
|
|
|
+ self._compress_size = zipinfo.compress_size
|
|
|
+ self._compress_left = zipinfo.compress_size
|
|
|
+
|
|
|
+ if self._compress_type == ZIP_DEFLATED:
|
|
|
+ self._decompressor = zlib.decompressobj(-15)
|
|
|
+ self._unconsumed = ''
|
|
|
+
|
|
|
+ self._readbuffer = ''
|
|
|
+ self._offset = 0
|
|
|
+
|
|
|
+ self._universal = 'U' in mode
|
|
|
+ self.newlines = None
|
|
|
+
|
|
|
+ # Adjust read size for encrypted files since the first 12 bytes
|
|
|
+ # are for the encryption/password information.
|
|
|
+ if self._decrypter is not None:
|
|
|
+ self._compress_left -= 12
|
|
|
+
|
|
|
+ self.mode = mode
|
|
|
+ self.name = zipinfo.filename
|
|
|
+
|
|
|
+ if hasattr(zipinfo, 'CRC'):
|
|
|
+ self._expected_crc = zipinfo.CRC
|
|
|
+ self._running_crc = crc32(b'') & 0xffffffff
|
|
|
+ else:
|
|
|
+ self._expected_crc = None
|
|
|
+
|
|
|
+ def readline(self, limit=-1):
|
|
|
+ """Read and return a line from the stream.
|
|
|
+
|
|
|
+ If limit is specified, at most limit bytes will be read.
|
|
|
+ """
|
|
|
+
|
|
|
+ if not self._universal and limit < 0:
|
|
|
+ # Shortcut common case - newline found in buffer.
|
|
|
+ i = self._readbuffer.find('\n', self._offset) + 1
|
|
|
+ if i > 0:
|
|
|
+ line = self._readbuffer[self._offset: i]
|
|
|
+ self._offset = i
|
|
|
+ return line
|
|
|
+
|
|
|
+ if not self._universal:
|
|
|
+ return io.BufferedIOBase.readline(self, limit)
|
|
|
+
|
|
|
+ line = ''
|
|
|
+ while limit < 0 or len(line) < limit:
|
|
|
+ readahead = self.peek(2)
|
|
|
+ if readahead == '':
|
|
|
+ return line
|
|
|
+
|
|
|
+ #
|
|
|
+ # Search for universal newlines or line chunks.
|
|
|
+ #
|
|
|
+ # The pattern returns either a line chunk or a newline, but not
|
|
|
+ # both. Combined with peek(2), we are assured that the sequence
|
|
|
+ # '\r\n' is always retrieved completely and never split into
|
|
|
+ # separate newlines - '\r', '\n' due to coincidental readaheads.
|
|
|
+ #
|
|
|
+ match = self.PATTERN.search(readahead)
|
|
|
+ newline = match.group('newline')
|
|
|
+ if newline is not None:
|
|
|
+ if self.newlines is None:
|
|
|
+ self.newlines = []
|
|
|
+ if newline not in self.newlines:
|
|
|
+ self.newlines.append(newline)
|
|
|
+ self._offset += len(newline)
|
|
|
+ return line + '\n'
|
|
|
+
|
|
|
+ chunk = match.group('chunk')
|
|
|
+ if limit >= 0:
|
|
|
+ chunk = chunk[: limit - len(line)]
|
|
|
+
|
|
|
+ self._offset += len(chunk)
|
|
|
+ line += chunk
|
|
|
+
|
|
|
+ return line
|
|
|
+
|
|
|
+ def peek(self, n=1):
|
|
|
+ """Returns buffered bytes without advancing the position."""
|
|
|
+ if n > len(self._readbuffer) - self._offset:
|
|
|
+ chunk = self.read(n)
|
|
|
+ self._offset -= len(chunk)
|
|
|
+
|
|
|
+ # Return up to 512 bytes to reduce allocation overhead for tight loops.
|
|
|
+ return self._readbuffer[self._offset: self._offset + 512]
|
|
|
+
|
|
|
+ def readable(self):
|
|
|
+ return True
|
|
|
+
|
|
|
+ def read(self, n=-1):
|
|
|
+ """Read and return up to n bytes.
|
|
|
+ If the argument is omitted, None, or negative, data is read and returned until EOF is reached..
|
|
|
+ """
|
|
|
+ buf = ''
|
|
|
+ if n is None:
|
|
|
+ n = -1
|
|
|
+ while True:
|
|
|
+ if n < 0:
|
|
|
+ data = self.read1(n)
|
|
|
+ elif n > len(buf):
|
|
|
+ data = self.read1(n - len(buf))
|
|
|
+ else:
|
|
|
+ return buf
|
|
|
+ if len(data) == 0:
|
|
|
+ return buf
|
|
|
+ buf += data
|
|
|
+
|
|
|
+ def _update_crc(self, newdata, eof):
|
|
|
+ # Update the CRC using the given data.
|
|
|
+ if self._expected_crc is None:
|
|
|
+ # No need to compute the CRC if we don't have a reference value
|
|
|
+ return
|
|
|
+ self._running_crc = crc32(newdata, self._running_crc) & 0xffffffff
|
|
|
+ # Check the CRC if we're at the end of the file
|
|
|
+ if eof and self._running_crc != self._expected_crc:
|
|
|
+ raise BadZipfile("Bad CRC-32 for file %r" % self.name)
|
|
|
+
|
|
|
+ def read1(self, n):
|
|
|
+ """Read up to n bytes with at most one read() system call."""
|
|
|
+
|
|
|
+ # Simplify algorithm (branching) by transforming negative n to large n.
|
|
|
+ if n < 0 or n is None:
|
|
|
+ n = self.MAX_N
|
|
|
+
|
|
|
+ # Bytes available in read buffer.
|
|
|
+ len_readbuffer = len(self._readbuffer) - self._offset
|
|
|
+
|
|
|
+ # Read from file.
|
|
|
+ if self._compress_left > 0 and n > len_readbuffer + len(self._unconsumed):
|
|
|
+ nbytes = n - len_readbuffer - len(self._unconsumed)
|
|
|
+ nbytes = max(nbytes, self.MIN_READ_SIZE)
|
|
|
+ nbytes = min(nbytes, self._compress_left)
|
|
|
+
|
|
|
+ data = self._fileobj.read(nbytes)
|
|
|
+ self._compress_left -= len(data)
|
|
|
+
|
|
|
+ if data and self._decrypter is not None:
|
|
|
+ data = ''.join(map(self._decrypter, data))
|
|
|
+
|
|
|
+ if self._compress_type == ZIP_STORED:
|
|
|
+ self._update_crc(data, eof=(self._compress_left==0))
|
|
|
+ self._readbuffer = self._readbuffer[self._offset:] + data
|
|
|
+ self._offset = 0
|
|
|
+ else:
|
|
|
+ # Prepare deflated bytes for decompression.
|
|
|
+ self._unconsumed += data
|
|
|
+
|
|
|
+ # Handle unconsumed data.
|
|
|
+ if (len(self._unconsumed) > 0 and n > len_readbuffer and
|
|
|
+ self._compress_type == ZIP_DEFLATED):
|
|
|
+ data = self._decompressor.decompress(
|
|
|
+ self._unconsumed,
|
|
|
+ max(n - len_readbuffer, self.MIN_READ_SIZE)
|
|
|
+ )
|
|
|
+
|
|
|
+ self._unconsumed = self._decompressor.unconsumed_tail
|
|
|
+ eof = len(self._unconsumed) == 0 and self._compress_left == 0
|
|
|
+ if eof:
|
|
|
+ data += self._decompressor.flush()
|
|
|
+
|
|
|
+ self._update_crc(data, eof=eof)
|
|
|
+ self._readbuffer = self._readbuffer[self._offset:] + data
|
|
|
+ self._offset = 0
|
|
|
+
|
|
|
+ # Read from buffer.
|
|
|
+ data = self._readbuffer[self._offset: self._offset + n]
|
|
|
+ self._offset += len(data)
|
|
|
+ return data
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+class ZipFile(object):
|
|
|
+ """ 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':
|
|
|
+ # set the modified flag so central directory gets written
|
|
|
+ # even if no files are added to the archive
|
|
|
+ self._didModify = True
|
|
|
+ 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)
|
|
|
+
|
|
|
+ # set the modified flag so central directory gets written
|
|
|
+ # even if no files are added to the archive
|
|
|
+ self._didModify = True
|
|
|
+ else:
|
|
|
+ if not self._filePassed:
|
|
|
+ self.fp.close()
|
|
|
+ self.fp = None
|
|
|
+ raise RuntimeError, 'Mode must be "r", "w" or "a"'
|
|
|
+
|
|
|
+ def __enter__(self):
|
|
|
+ return self
|
|
|
+
|
|
|
+ def __exit__(self, type, value, traceback):
|
|
|
+ self.close()
|
|
|
+
|
|
|
+ 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
|
|
|
+ try:
|
|
|
+ endrec = _EndRecData(fp)
|
|
|
+ except IOError:
|
|
|
+ raise BadZipfile("File is not a zip file")
|
|
|
+ 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_SIGNATURE] == stringEndArchive64:
|
|
|
+ # If Zip64 extension structures are present, 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] != stringCentralDir:
|
|
|
+ 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."""
|
|
|
+ chunk_size = 2 ** 20
|
|
|
+ for zinfo in self.filelist:
|
|
|
+ try:
|
|
|
+ # Read by chunks, to avoid an OverflowError or a
|
|
|
+ # MemoryError with very large embedded files.
|
|
|
+ f = self.open(zinfo.filename, "r")
|
|
|
+ while f.read(chunk_size): # Check CRC-32
|
|
|
+ pass
|
|
|
+ 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
|
|
|
+
|
|
|
+ @property
|
|
|
+ def comment(self):
|
|
|
+ """The comment text associated with the ZIP file."""
|
|
|
+ return self._comment
|
|
|
+
|
|
|
+ @comment.setter
|
|
|
+ def comment(self, comment):
|
|
|
+ # check for valid comment length
|
|
|
+ if len(comment) >= ZIP_MAX_COMMENT:
|
|
|
+ if self.debug:
|
|
|
+ print('Archive comment is too long; truncating to %d bytes'
|
|
|
+ % ZIP_MAX_COMMENT)
|
|
|
+ comment = comment[:ZIP_MAX_COMMENT]
|
|
|
+ self._comment = comment
|
|
|
+ self._didModify = True
|
|
|
+
|
|
|
+ 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] != stringFileHeader:
|
|
|
+ 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)
|
|
|
+
|
|
|
+ return ZipExtFile(zef_file, mode, zinfo, zd)
|
|
|
+
|
|
|
+ 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.
|
|
|
+ # Strip trailing path separator, unless it represents the root.
|
|
|
+ if (targetpath[-1:] in (os.path.sep, os.path.altsep)
|
|
|
+ and len(os.path.splitdrive(targetpath)[1]) > 1):
|
|
|
+ targetpath = targetpath[:-1]
|
|
|
+
|
|
|
+ # don't include leading "/" from file name if present
|
|
|
+ if member.filename[0] == '/':
|
|
|
+ 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)
|
|
|
+
|
|
|
+ if member.filename[-1] == '/':
|
|
|
+ if not os.path.isdir(targetpath):
|
|
|
+ os.mkdir(targetpath)
|
|
|
+ return targetpath
|
|
|
+
|
|
|
+ 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)
|
|
|
+ isdir = stat.S_ISDIR(st.st_mode)
|
|
|
+ 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:]
|
|
|
+ if isdir:
|
|
|
+ arcname += '/'
|
|
|
+ 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
|
|
|
+
|
|
|
+ if isdir:
|
|
|
+ zinfo.file_size = 0
|
|
|
+ zinfo.compress_size = 0
|
|
|
+ zinfo.CRC = 0
|
|
|
+ self.filelist.append(zinfo)
|
|
|
+ self.NameToInfo[zinfo.filename] = zinfo
|
|
|
+ self.fp.write(zinfo.FileHeader())
|
|
|
+ return
|
|
|
+
|
|
|
+ with open(filename, "rb") as fp:
|
|
|
+ # 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)
|
|
|
+ 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, compress_type=None):
|
|
|
+ """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
|
|
|
+ zinfo.external_attr = 0600 << 16
|
|
|
+ else:
|
|
|
+ zinfo = zinfo_or_arcname
|
|
|
+
|
|
|
+ if not self.fp:
|
|
|
+ raise RuntimeError(
|
|
|
+ "Attempt to write to ZIP archive that was already closed")
|
|
|
+
|
|
|
+ if compress_type is not None:
|
|
|
+ zinfo.compress_type = compress_type
|
|
|
+
|
|
|
+ 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,
|
|
|
+ stringCentralDir, 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
|
|
|
+ centDirCount = count
|
|
|
+ centDirSize = pos2 - pos1
|
|
|
+ centDirOffset = pos1
|
|
|
+ if (centDirCount >= ZIP_FILECOUNT_LIMIT or
|
|
|
+ centDirOffset > ZIP64_LIMIT or
|
|
|
+ centDirSize > ZIP64_LIMIT):
|
|
|
+ # Need to write the ZIP64 end-of-archive records
|
|
|
+ zip64endrec = struct.pack(
|
|
|
+ structEndArchive64, stringEndArchive64,
|
|
|
+ 44, 45, 45, 0, 0, centDirCount, centDirCount,
|
|
|
+ centDirSize, centDirOffset)
|
|
|
+ self.fp.write(zip64endrec)
|
|
|
+
|
|
|
+ zip64locrec = struct.pack(
|
|
|
+ structEndArchive64Locator,
|
|
|
+ stringEndArchive64Locator, 0, pos2, 1)
|
|
|
+ self.fp.write(zip64locrec)
|
|
|
+ centDirCount = min(centDirCount, 0xFFFF)
|
|
|
+ centDirSize = min(centDirSize, 0xFFFFFFFF)
|
|
|
+ centDirOffset = min(centDirOffset, 0xFFFFFFFF)
|
|
|
+
|
|
|
+ endrec = struct.pack(structEndArchive, stringEndArchive,
|
|
|
+ 0, 0, centDirCount, centDirCount,
|
|
|
+ centDirSize, 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')
|
|
|
+ badfile = zf.testzip()
|
|
|
+ if badfile:
|
|
|
+ print("The following enclosed file is corrupted: {!r}".format(badfile))
|
|
|
+ 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)
|
|
|
+ with open(tgt, 'wb') as fp:
|
|
|
+ fp.write(zf.read(path))
|
|
|
+ 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()
|
Ivan Safrin