| """ |
| Read and write ZIP files. |
| """ |
| import struct, os, time, sys |
| import binascii, cStringIO |
| |
| try: |
| import zlib # We may need its compression method |
| except ImportError: |
| zlib = None |
| |
| __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 |
| |
| # constants for Zip file compression methods |
| ZIP_STORED = 0 |
| ZIP_DEFLATED = 8 |
| # Other ZIP compression methods not supported |
| |
| # Here are some struct module formats for reading headers |
| structEndArchive = "<4s4H2LH" # 9 items, end of archive, 22 bytes |
| stringEndArchive = "PK\005\006" # magic number for end of archive record |
| structCentralDir = "<4s4B4HlLL5HLL"# 19 items, central directory, 46 bytes |
| stringCentralDir = "PK\001\002" # magic number for central directory |
| structFileHeader = "<4s2B4HlLL2H" # 12 items, file header record, 30 bytes |
| stringFileHeader = "PK\003\004" # magic number for file header |
| structEndArchive64Locator = "<4slql" # 4 items, locate Zip64 header, 20 bytes |
| stringEndArchive64Locator = "PK\x06\x07" # magic token for locator header |
| structEndArchive64 = "<4sqhhllqqqq" # 10 items, end of archive (Zip64), 56 bytes |
| stringEndArchive64 = "PK\x06\x06" # magic token for Zip64 header |
| |
| |
| # 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 # is this meaningful? |
| _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 |
| |
| # indexes of entries in the local file header structure |
| _FH_SIGNATURE = 0 |
| _FH_EXTRACT_VERSION = 1 |
| _FH_EXTRACT_SYSTEM = 2 # is this meaningful? |
| _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 |
| |
| 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 |
| """ |
| locatorSize = struct.calcsize(structEndArchive64Locator) |
| fpin.seek(offset - locatorSize, 2) |
| data = fpin.read(locatorSize) |
| sig, diskno, reloff, disks = struct.unpack(structEndArchive64Locator, data) |
| if sig != stringEndArchive64Locator: |
| return endrec |
| |
| if diskno != 0 or disks != 1: |
| raise BadZipfile("zipfiles that span multiple disks are not supported") |
| |
| # Assume no 'zip64 extensible data' |
| endArchiveSize = struct.calcsize(structEndArchive64) |
| fpin.seek(offset - locatorSize - endArchiveSize, 2) |
| data = fpin.read(endArchiveSize) |
| sig, sz, create_version, read_version, disk_num, disk_dir, \ |
| dircount, dircount2, dirsize, diroffset = \ |
| struct.unpack(structEndArchive64, data) |
| if sig != stringEndArchive64: |
| return endrec |
| |
| # Update the original endrec using data from the ZIP64 record |
| endrec[1] = disk_num |
| endrec[2] = disk_dir |
| endrec[3] = dircount |
| endrec[4] = dircount2 |
| endrec[5] = dirsize |
| endrec[6] = 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.""" |
| fpin.seek(-22, 2) # Assume no archive comment. |
| filesize = fpin.tell() + 22 # Get file size |
| data = fpin.read() |
| if data[0:4] == stringEndArchive and data[-2:] == "\000\000": |
| endrec = struct.unpack(structEndArchive, data) |
| endrec = list(endrec) |
| endrec.append("") # Append the archive comment |
| endrec.append(filesize - 22) # Append the record start offset |
| if endrec[-4] == -1 or endrec[-4] == 0xffffffff: |
| return _EndRecData64(fpin, -22, endrec) |
| return endrec |
| # Search the last END_BLOCK bytes of the file for the record signature. |
| # The comment is appended to the ZIP file and has a 16 bit length. |
| # So the comment may be up to 64K long. We limit the search for the |
| # signature to a few Kbytes at the end of the file for efficiency. |
| # also, the signature must not appear in the comment. |
| END_BLOCK = min(filesize, 1024 * 4) |
| fpin.seek(filesize - END_BLOCK, 0) |
| data = fpin.read() |
| start = data.rfind(stringEndArchive) |
| if start >= 0: # Correct signature string was found |
| endrec = struct.unpack(structEndArchive, data[start:start+22]) |
| endrec = list(endrec) |
| comment = data[start+22:] |
| if endrec[7] == len(comment): # Comment length checks out |
| # Append the archive comment and start offset |
| endrec.append(comment) |
| endrec.append(filesize - END_BLOCK + start) |
| if endrec[-4] == -1 or endrec[-4] == 0xffffffff: |
| return _EndRecData64(fpin, - END_BLOCK + start, endrec) |
| return endrec |
| return # Error, return None |
| |
| |
| 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', |
| ) |
| |
| 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 # -1 |
| compress_size = 0xffffffff # -1 |
| self.extract_version = max(45, self.extract_version) |
| self.create_version = max(45, self.extract_version) |
| |
| header = struct.pack(structFileHeader, stringFileHeader, |
| self.extract_version, self.reserved, self.flag_bits, |
| self.compress_type, dostime, dosdate, CRC, |
| compress_size, file_size, |
| len(self.filename), len(extra)) |
| return header + self.filename + extra |
| |
| 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 == -1 or self.file_size == 0xFFFFFFFFL: |
| self.file_size = counts[idx] |
| idx += 1 |
| |
| if self.compress_size == -1 or self.compress_size == 0xFFFFFFFFL: |
| self.compress_size = counts[idx] |
| idx += 1 |
| |
| if self.header_offset == -1 or self.header_offset == 0xffffffffL: |
| old = self.header_offset |
| self.header_offset = counts[idx] |
| idx+=1 |
| |
| extra = extra[ln+4:] |
| |
| |
| class ZipFile: |
| """ Class with methods to open, read, write, close, list zip files. |
| |
| z = ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=True) |
| |
| 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".""" |
| self._allowZip64 = allowZip64 |
| self._didModify = False |
| 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.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] |
| |
| # 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'} |
| self.fp = open(file, modeDict[mode]) |
| 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[5] # bytes in central directory |
| offset_cd = endrec[6] # offset of central directory |
| self.comment = endrec[8] # archive comment |
| # endrec[9] is the offset of the "End of Central Dir" record |
| if endrec[9] > ZIP64_LIMIT: |
| x = endrec[9] - size_cd - 56 - 20 |
| else: |
| x = endrec[9] - size_cd |
| # "concat" is zero, unless zip was concatenated to another file |
| concat = x - offset_cd |
| if self.debug > 2: |
| print "given, inferred, offset", offset_cd, x, 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(46) |
| total = total + 46 |
| 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]) |
| total = (total + centdir[_CD_FILENAME_LENGTH] |
| + centdir[_CD_EXTRA_FIELD_LENGTH] |
| + 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.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 |
| self.filelist.append(x) |
| self.NameToInfo[x.filename] = x |
| 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'.""" |
| return self.NameToInfo[name] |
| |
| def read(self, name): |
| """Return file bytes (as a string) for name.""" |
| if self.mode not in ("r", "a"): |
| raise RuntimeError, 'read() requires mode "r" or "a"' |
| if not self.fp: |
| raise RuntimeError, \ |
| "Attempt to read ZIP archive that was already closed" |
| zinfo = self.getinfo(name) |
| filepos = self.fp.tell() |
| |
| self.fp.seek(zinfo.header_offset, 0) |
| |
| # Skip the file header: |
| fheader = self.fp.read(30) |
| if fheader[0:4] != stringFileHeader: |
| raise BadZipfile, "Bad magic number for file header" |
| |
| fheader = struct.unpack(structFileHeader, fheader) |
| fname = self.fp.read(fheader[_FH_FILENAME_LENGTH]) |
| if fheader[_FH_EXTRA_FIELD_LENGTH]: |
| self.fp.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) |
| |
| bytes = self.fp.read(zinfo.compress_size) |
| self.fp.seek(filepos, 0) |
| if zinfo.compress_type == ZIP_STORED: |
| pass |
| elif zinfo.compress_type == ZIP_DEFLATED: |
| if not zlib: |
| raise RuntimeError, \ |
| "De-compression requires the (missing) zlib module" |
| # zlib compress/decompress code by Jeremy Hylton of CNRI |
| dc = zlib.decompressobj(-15) |
| bytes = dc.decompress(bytes) |
| # need to feed in unused pad byte so that zlib won't choke |
| ex = dc.decompress('Z') + dc.flush() |
| if ex: |
| bytes = bytes + ex |
| else: |
| raise BadZipfile, \ |
| "Unsupported compression method %d for file %s" % \ |
| (zinfo.compress_type, name) |
| crc = binascii.crc32(bytes) |
| if crc != zinfo.CRC: |
| raise BadZipfile, "Bad CRC-32 for file %s" % name |
| return bytes |
| |
| 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.""" |
| 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 = binascii.crc32(buf, CRC) |
| 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 |
| 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 = binascii.crc32(bytes) # 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 #-1 |
| compress_size = 0xffffffff #-1 |
| else: |
| file_size = zinfo.file_size |
| compress_size = zinfo.compress_size |
| |
| if zinfo.header_offset > ZIP64_LIMIT: |
| extra.append(zinfo.header_offset) |
| header_offset = -1 # struct "l" format: 32 one bits |
| 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 |
| |
| centdir = struct.pack(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) |
| self.fp.write(centdir) |
| self.fp.write(zinfo.filename) |
| self.fp.write(extra_data) |
| self.fp.write(zinfo.comment) |
| |
| pos2 = self.fp.tell() |
| # Write end-of-zip-archive record |
| if pos1 > ZIP64_LIMIT: |
| # Need to write the ZIP64 end-of-archive records |
| zip64endrec = struct.pack( |
| structEndArchive64, stringEndArchive64, |
| 44, 45, 45, 0, 0, count, count, pos2 - pos1, pos1) |
| self.fp.write(zip64endrec) |
| |
| zip64locrec = struct.pack( |
| structEndArchive64Locator, |
| stringEndArchive64Locator, 0, pos2, 1) |
| self.fp.write(zip64locrec) |
| |
| # XXX Why is `pos3` computed next? It's never referenced. |
| pos3 = self.fp.tell() |
| endrec = struct.pack(structEndArchive, stringEndArchive, |
| 0, 0, count, count, pos2 - pos1, -1, 0) |
| self.fp.write(endrec) |
| |
| else: |
| endrec = struct.pack(structEndArchive, stringEndArchive, |
| 0, 0, count, count, pos2 - pos1, pos1, 0) |
| self.fp.write(endrec) |
| 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() |