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21
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1 """
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2 Read and write ZIP files.
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3
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4 XXX references to utf-8 need further investigation.
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5 """
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6 # Improved by Chortos-2 in 2010 (added bzip2 support)
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7 import struct, os, time, sys, shutil
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8 import binascii, io, stat
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9
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10 try:
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11 import zlib # We may need its compression method
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12 crc32 = zlib.crc32
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13 except ImportError:
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14 zlib = None
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15 crc32 = binascii.crc32
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16
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17 try:
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18 import bz2 # We may need its compression method
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19 except ImportError:
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20 bz2 = None
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21
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22 __all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",
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23 "ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile", "ZIP_BZIP2" ]
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24
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25 class BadZipfile(Exception):
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26 pass
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27
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28
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29 class LargeZipFile(Exception):
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30 """
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31 Raised when writing a zipfile, the zipfile requires ZIP64 extensions
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32 and those extensions are disabled.
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33 """
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34
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35 error = BadZipfile # The exception raised by this module
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36
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37 ZIP64_LIMIT = (1 << 31) - 1
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38 ZIP_FILECOUNT_LIMIT = 1 << 16
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39 ZIP_MAX_COMMENT = (1 << 16) - 1
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40
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41 # constants for Zip file compression methods
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42 ZIP_STORED = 0
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43 ZIP_DEFLATED = 8
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44 ZIP_BZIP2 = 12
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45 # Other ZIP compression methods not supported
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46
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47 # Below are some formats and associated data for reading/writing headers using
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48 # the struct module. The names and structures of headers/records are those used
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49 # in the PKWARE description of the ZIP file format:
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50 # http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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51 # (URL valid as of January 2008)
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52
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53 # The "end of central directory" structure, magic number, size, and indices
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54 # (section V.I in the format document)
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55 structEndArchive = b"<4s4H2LH"
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56 stringEndArchive = b"PK\005\006"
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57 sizeEndCentDir = struct.calcsize(structEndArchive)
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58
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59 _ECD_SIGNATURE = 0
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60 _ECD_DISK_NUMBER = 1
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61 _ECD_DISK_START = 2
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62 _ECD_ENTRIES_THIS_DISK = 3
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63 _ECD_ENTRIES_TOTAL = 4
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64 _ECD_SIZE = 5
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65 _ECD_OFFSET = 6
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66 _ECD_COMMENT_SIZE = 7
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67 # These last two indices are not part of the structure as defined in the
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68 # spec, but they are used internally by this module as a convenience
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69 _ECD_COMMENT = 8
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70 _ECD_LOCATION = 9
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71
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72 # The "central directory" structure, magic number, size, and indices
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73 # of entries in the structure (section V.F in the format document)
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74 structCentralDir = "<4s4B4HL2L5H2L"
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75 stringCentralDir = b"PK\001\002"
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76 sizeCentralDir = struct.calcsize(structCentralDir)
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77
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78 # indexes of entries in the central directory structure
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79 _CD_SIGNATURE = 0
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80 _CD_CREATE_VERSION = 1
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81 _CD_CREATE_SYSTEM = 2
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82 _CD_EXTRACT_VERSION = 3
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83 _CD_EXTRACT_SYSTEM = 4
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84 _CD_FLAG_BITS = 5
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85 _CD_COMPRESS_TYPE = 6
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86 _CD_TIME = 7
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87 _CD_DATE = 8
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88 _CD_CRC = 9
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89 _CD_COMPRESSED_SIZE = 10
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90 _CD_UNCOMPRESSED_SIZE = 11
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91 _CD_FILENAME_LENGTH = 12
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92 _CD_EXTRA_FIELD_LENGTH = 13
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93 _CD_COMMENT_LENGTH = 14
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94 _CD_DISK_NUMBER_START = 15
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95 _CD_INTERNAL_FILE_ATTRIBUTES = 16
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96 _CD_EXTERNAL_FILE_ATTRIBUTES = 17
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97 _CD_LOCAL_HEADER_OFFSET = 18
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98
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99 # The "local file header" structure, magic number, size, and indices
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100 # (section V.A in the format document)
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101 structFileHeader = "<4s2B4HL2L2H"
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102 stringFileHeader = b"PK\003\004"
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103 sizeFileHeader = struct.calcsize(structFileHeader)
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104
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105 _FH_SIGNATURE = 0
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106 _FH_EXTRACT_VERSION = 1
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107 _FH_EXTRACT_SYSTEM = 2
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108 _FH_GENERAL_PURPOSE_FLAG_BITS = 3
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109 _FH_COMPRESSION_METHOD = 4
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110 _FH_LAST_MOD_TIME = 5
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111 _FH_LAST_MOD_DATE = 6
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112 _FH_CRC = 7
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113 _FH_COMPRESSED_SIZE = 8
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114 _FH_UNCOMPRESSED_SIZE = 9
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115 _FH_FILENAME_LENGTH = 10
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116 _FH_EXTRA_FIELD_LENGTH = 11
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117
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118 # The "Zip64 end of central directory locator" structure, magic number, and size
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119 structEndArchive64Locator = "<4sLQL"
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120 stringEndArchive64Locator = b"PK\x06\x07"
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121 sizeEndCentDir64Locator = struct.calcsize(structEndArchive64Locator)
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122
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123 # The "Zip64 end of central directory" record, magic number, size, and indices
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124 # (section V.G in the format document)
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125 structEndArchive64 = "<4sQ2H2L4Q"
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126 stringEndArchive64 = b"PK\x06\x06"
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127 sizeEndCentDir64 = struct.calcsize(structEndArchive64)
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128
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129 _CD64_SIGNATURE = 0
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130 _CD64_DIRECTORY_RECSIZE = 1
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131 _CD64_CREATE_VERSION = 2
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132 _CD64_EXTRACT_VERSION = 3
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133 _CD64_DISK_NUMBER = 4
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134 _CD64_DISK_NUMBER_START = 5
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135 _CD64_NUMBER_ENTRIES_THIS_DISK = 6
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136 _CD64_NUMBER_ENTRIES_TOTAL = 7
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137 _CD64_DIRECTORY_SIZE = 8
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138 _CD64_OFFSET_START_CENTDIR = 9
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139
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140 def _check_zipfile(fp):
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141 try:
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142 if _EndRecData(fp):
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143 return True # file has correct magic number
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144 except IOError:
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145 pass
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146 return False
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147
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148 def is_zipfile(filename):
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149 """Quickly see if a file is a ZIP file by checking the magic number.
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150
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151 The filename argument may be a file or file-like object too.
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152 """
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153 result = False
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154 try:
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155 if hasattr(filename, "read"):
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156 result = _check_zipfile(fp=filename)
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157 else:
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158 with open(filename, "rb") as fp:
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159 result = _check_zipfile(fp)
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160 except IOError:
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161 pass
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162 return result
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163
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164 def _EndRecData64(fpin, offset, endrec):
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165 """
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166 Read the ZIP64 end-of-archive records and use that to update endrec
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167 """
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168 fpin.seek(offset - sizeEndCentDir64Locator, 2)
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169 data = fpin.read(sizeEndCentDir64Locator)
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170 sig, diskno, reloff, disks = struct.unpack(structEndArchive64Locator, data)
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171 if sig != stringEndArchive64Locator:
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172 return endrec
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173
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174 if diskno != 0 or disks != 1:
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175 raise BadZipfile("zipfiles that span multiple disks are not supported")
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176
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177 # Assume no 'zip64 extensible data'
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178 fpin.seek(offset - sizeEndCentDir64Locator - sizeEndCentDir64, 2)
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179 data = fpin.read(sizeEndCentDir64)
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180 sig, sz, create_version, read_version, disk_num, disk_dir, \
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181 dircount, dircount2, dirsize, diroffset = \
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182 struct.unpack(structEndArchive64, data)
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183 if sig != stringEndArchive64:
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184 return endrec
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185
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186 # Update the original endrec using data from the ZIP64 record
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187 endrec[_ECD_SIGNATURE] = sig
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188 endrec[_ECD_DISK_NUMBER] = disk_num
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189 endrec[_ECD_DISK_START] = disk_dir
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190 endrec[_ECD_ENTRIES_THIS_DISK] = dircount
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191 endrec[_ECD_ENTRIES_TOTAL] = dircount2
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192 endrec[_ECD_SIZE] = dirsize
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193 endrec[_ECD_OFFSET] = diroffset
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194 return endrec
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195
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196
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197 def _EndRecData(fpin):
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198 """Return data from the "End of Central Directory" record, or None.
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199
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200 The data is a list of the nine items in the ZIP "End of central dir"
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201 record followed by a tenth item, the file seek offset of this record."""
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202
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203 # Determine file size
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204 fpin.seek(0, 2)
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205 filesize = fpin.tell()
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206
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207 # Check to see if this is ZIP file with no archive comment (the
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208 # "end of central directory" structure should be the last item in the
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209 # file if this is the case).
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210 try:
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211 fpin.seek(-sizeEndCentDir, 2)
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212 except IOError:
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213 return None
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214 data = fpin.read()
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215 if data[0:4] == stringEndArchive and data[-2:] == b"\000\000":
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216 # the signature is correct and there's no comment, unpack structure
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217 endrec = struct.unpack(structEndArchive, data)
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218 endrec=list(endrec)
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219
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220 # Append a blank comment and record start offset
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221 endrec.append(b"")
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222 endrec.append(filesize - sizeEndCentDir)
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223
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224 # Try to read the "Zip64 end of central directory" structure
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225 return _EndRecData64(fpin, -sizeEndCentDir, endrec)
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226
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227 # Either this is not a ZIP file, or it is a ZIP file with an archive
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228 # comment. Search the end of the file for the "end of central directory"
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229 # record signature. The comment is the last item in the ZIP file and may be
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230 # up to 64K long. It is assumed that the "end of central directory" magic
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231 # number does not appear in the comment.
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232 maxCommentStart = max(filesize - (1 << 16) - sizeEndCentDir, 0)
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233 fpin.seek(maxCommentStart, 0)
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234 data = fpin.read()
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235 start = data.rfind(stringEndArchive)
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236 if start >= 0:
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237 # found the magic number; attempt to unpack and interpret
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238 recData = data[start:start+sizeEndCentDir]
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239 endrec = list(struct.unpack(structEndArchive, recData))
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240 comment = data[start+sizeEndCentDir:]
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241 # check that comment length is correct
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242 if endrec[_ECD_COMMENT_SIZE] == len(comment):
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243 # Append the archive comment and start offset
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244 endrec.append(comment)
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245 endrec.append(maxCommentStart + start)
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246
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247 # Try to read the "Zip64 end of central directory" structure
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248 return _EndRecData64(fpin, maxCommentStart + start - filesize,
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249 endrec)
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250
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251 # Unable to find a valid end of central directory structure
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252 return
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253
|
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254
|
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255 class ZipInfo (object):
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256 """Class with attributes describing each file in the ZIP archive."""
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257
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258 __slots__ = (
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259 'orig_filename',
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260 'filename',
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261 'date_time',
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262 'compress_type',
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263 'comment',
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264 'extra',
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265 'create_system',
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266 'create_version',
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267 'extract_version',
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268 'reserved',
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269 'flag_bits',
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270 'volume',
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271 'internal_attr',
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272 'external_attr',
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273 'header_offset',
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274 'CRC',
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275 'compress_size',
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276 'file_size',
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277 '_raw_time',
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278 )
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279
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280 def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
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281 self.orig_filename = filename # Original file name in archive
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282
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283 # Terminate the file name at the first null byte. Null bytes in file
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284 # names are used as tricks by viruses in archives.
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285 null_byte = filename.find(chr(0))
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286 if null_byte >= 0:
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287 filename = filename[0:null_byte]
|
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288 # This is used to ensure paths in generated ZIP files always use
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289 # forward slashes as the directory separator, as required by the
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290 # ZIP format specification.
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291 if os.sep != "/" and os.sep in filename:
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292 filename = filename.replace(os.sep, "/")
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293
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294 self.filename = filename # Normalized file name
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295 self.date_time = date_time # year, month, day, hour, min, sec
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296 # Standard values:
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297 self.compress_type = ZIP_STORED # Type of compression for the file
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298 self.comment = b"" # Comment for each file
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299 self.extra = b"" # ZIP extra data
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300 if sys.platform == 'win32':
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301 self.create_system = 0 # System which created ZIP archive
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302 else:
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303 # Assume everything else is unix-y
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304 self.create_system = 3 # System which created ZIP archive
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305 self.create_version = 20 # Version which created ZIP archive
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306 self.extract_version = 20 # Version needed to extract archive
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307 self.reserved = 0 # Must be zero
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308 self.flag_bits = 0 # ZIP flag bits
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309 self.volume = 0 # Volume number of file header
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310 self.internal_attr = 0 # Internal attributes
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311 self.external_attr = 0 # External file attributes
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|
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312 # Other attributes are set by class ZipFile:
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313 # header_offset Byte offset to the file header
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314 # CRC CRC-32 of the uncompressed file
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315 # compress_size Size of the compressed file
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316 # file_size Size of the uncompressed file
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317
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318 def FileHeader(self):
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|
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319 """Return the per-file header as a string."""
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320 dt = self.date_time
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321 dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
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322 dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
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|
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323 if self.flag_bits & 0x08:
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324 # Set these to zero because we write them after the file data
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325 CRC = compress_size = file_size = 0
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326 else:
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327 CRC = self.CRC
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328 compress_size = self.compress_size
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329 file_size = self.file_size
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330
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331 extra = self.extra
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|
|
332
|
|
|
333 if file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT:
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|
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334 # File is larger than what fits into a 4 byte integer,
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|
|
335 # fall back to the ZIP64 extension
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|
|
336 fmt = '<HHQQ'
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|
|
337 extra = extra + struct.pack(fmt,
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|
|
338 1, struct.calcsize(fmt)-4, file_size, compress_size)
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|
|
339 file_size = 0xffffffff
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|
|
340 compress_size = 0xffffffff
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|
|
341 self.extract_version = max(45, self.extract_version)
|
|
|
342 self.create_version = max(45, self.extract_version)
|
|
|
343
|
|
|
344 filename, flag_bits = self._encodeFilenameFlags()
|
|
|
345 header = struct.pack(structFileHeader, stringFileHeader,
|
|
|
346 self.extract_version, self.reserved, flag_bits,
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|
|
347 self.compress_type, dostime, dosdate, CRC,
|
|
|
348 compress_size, file_size,
|
|
|
349 len(filename), len(extra))
|
|
|
350 return header + filename + extra
|
|
|
351
|
|
|
352 def _encodeFilenameFlags(self):
|
|
|
353 try:
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|
|
354 return self.filename.encode('ascii'), self.flag_bits
|
|
|
355 except UnicodeEncodeError:
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|
|
356 return self.filename.encode('utf-8'), self.flag_bits | 0x800
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|
|
357
|
|
|
358 def _decodeExtra(self):
|
|
|
359 # Try to decode the extra field.
|
|
|
360 extra = self.extra
|
|
|
361 unpack = struct.unpack
|
|
|
362 while extra:
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|
|
363 tp, ln = unpack('<HH', extra[:4])
|
|
|
364 if tp == 1:
|
|
|
365 if ln >= 24:
|
|
|
366 counts = unpack('<QQQ', extra[4:28])
|
|
|
367 elif ln == 16:
|
|
|
368 counts = unpack('<QQ', extra[4:20])
|
|
|
369 elif ln == 8:
|
|
|
370 counts = unpack('<Q', extra[4:12])
|
|
|
371 elif ln == 0:
|
|
|
372 counts = ()
|
|
|
373 else:
|
|
|
374 raise RuntimeError("Corrupt extra field %s"%(ln,))
|
|
|
375
|
|
|
376 idx = 0
|
|
|
377
|
|
|
378 # ZIP64 extension (large files and/or large archives)
|
|
|
379 if self.file_size in (0xffffffffffffffff, 0xffffffff):
|
|
|
380 self.file_size = counts[idx]
|
|
|
381 idx += 1
|
|
|
382
|
|
|
383 if self.compress_size == 0xFFFFFFFF:
|
|
|
384 self.compress_size = counts[idx]
|
|
|
385 idx += 1
|
|
|
386
|
|
|
387 if self.header_offset == 0xffffffff:
|
|
|
388 old = self.header_offset
|
|
|
389 self.header_offset = counts[idx]
|
|
|
390 idx+=1
|
|
|
391
|
|
|
392 extra = extra[ln+4:]
|
|
|
393
|
|
|
394
|
|
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395 class _ZipDecrypter:
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396 """Class to handle decryption of files stored within a ZIP archive.
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|
397
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|
|
398 ZIP supports a password-based form of encryption. Even though known
|
|
|
399 plaintext attacks have been found against it, it is still useful
|
|
|
400 to be able to get data out of such a file.
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|
|
401
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|
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402 Usage:
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|
403 zd = _ZipDecrypter(mypwd)
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|
404 plain_char = zd(cypher_char)
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|
|
405 plain_text = map(zd, cypher_text)
|
|
|
406 """
|
|
|
407
|
|
|
408 def _GenerateCRCTable():
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|
|
409 """Generate a CRC-32 table.
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|
|
410
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|
|
411 ZIP encryption uses the CRC32 one-byte primitive for scrambling some
|
|
|
412 internal keys. We noticed that a direct implementation is faster than
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|
|
413 relying on binascii.crc32().
|
|
|
414 """
|
|
|
415 poly = 0xedb88320
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|
|
416 table = [0] * 256
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|
|
417 for i in range(256):
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|
|
418 crc = i
|
|
|
419 for j in range(8):
|
|
|
420 if crc & 1:
|
|
|
421 crc = ((crc >> 1) & 0x7FFFFFFF) ^ poly
|
|
|
422 else:
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|
|
423 crc = ((crc >> 1) & 0x7FFFFFFF)
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|
|
424 table[i] = crc
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|
|
425 return table
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|
|
426 crctable = _GenerateCRCTable()
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|
|
427
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|
|
428 def _crc32(self, ch, crc):
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|
429 """Compute the CRC32 primitive on one byte."""
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|
430 return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ch) & 0xff]
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|
|
431
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|
|
432 def __init__(self, pwd):
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|
433 self.key0 = 305419896
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|
|
434 self.key1 = 591751049
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|
|
435 self.key2 = 878082192
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|
|
436 for p in pwd:
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|
|
437 self._UpdateKeys(p)
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|
|
438
|
|
|
439 def _UpdateKeys(self, c):
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|
|
440 self.key0 = self._crc32(c, self.key0)
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|
|
441 self.key1 = (self.key1 + (self.key0 & 255)) & 4294967295
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|
|
442 self.key1 = (self.key1 * 134775813 + 1) & 4294967295
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|
|
443 self.key2 = self._crc32((self.key1 >> 24) & 255, self.key2)
|
|
|
444
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|
|
445 def __call__(self, c):
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|
|
446 """Decrypt a single character."""
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|
|
447 assert isinstance(c, int)
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|
|
448 k = self.key2 | 2
|
|
|
449 c = c ^ (((k * (k^1)) >> 8) & 255)
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|
|
450 self._UpdateKeys(c)
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|
|
451 return c
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|
|
452
|
|
|
453 class ZipExtFile:
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454 """File-like object for reading an archive member.
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|
|
455 Is returned by ZipFile.open().
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|
|
456 """
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|
|
457
|
|
|
458 def __init__(self, fileobj, zipinfo, decrypt=None):
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|
|
459 self.fileobj = fileobj
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|
|
460 self.decrypter = decrypt
|
|
|
461 self.bytes_read = 0
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|
|
462 self.rawbuffer = b''
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|
|
463 self.readbuffer = b''
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|
464 self.linebuffer = b''
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|
465 self.eof = False
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|
466 self.univ_newlines = False
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|
|
467 self.nlSeps = (b"\n", )
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|
|
468 self.lastdiscard = b''
|
|
|
469
|
|
|
470 self.compress_type = zipinfo.compress_type
|
|
|
471 self.compress_size = zipinfo.compress_size
|
|
|
472
|
|
|
473 self.closed = False
|
|
|
474 self.mode = "r"
|
|
|
475 self.name = zipinfo.filename
|
|
|
476
|
|
|
477 # read from compressed files in 64k blocks
|
|
|
478 self.compreadsize = 64*1024
|
|
|
479 if self.compress_type == ZIP_DEFLATED:
|
|
|
480 self.dc = zlib.decompressobj(-15)
|
|
|
481 elif self.compress_type == ZIP_BZIP2:
|
|
|
482 self.dc = bz2.BZ2Decompressor()
|
|
|
483 self.compreadsize = 900000
|
|
|
484
|
|
|
485 def set_univ_newlines(self, univ_newlines):
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|
|
486 self.univ_newlines = univ_newlines
|
|
|
487
|
|
|
488 # pick line separator char(s) based on universal newlines flag
|
|
|
489 self.nlSeps = (b"\n", )
|
|
|
490 if self.univ_newlines:
|
|
|
491 self.nlSeps = (b"\r\n", b"\r", b"\n")
|
|
|
492
|
|
|
493 def __iter__(self):
|
|
|
494 return self
|
|
|
495
|
|
|
496 def __next__(self):
|
|
|
497 nextline = self.readline()
|
|
|
498 if not nextline:
|
|
|
499 raise StopIteration()
|
|
|
500
|
|
|
501 return nextline
|
|
|
502
|
|
|
503 def close(self):
|
|
|
504 self.closed = True
|
|
|
505
|
|
|
506 def _checkfornewline(self):
|
|
|
507 nl, nllen = -1, -1
|
|
|
508 if self.linebuffer:
|
|
|
509 # ugly check for cases where half of an \r\n pair was
|
|
|
510 # read on the last pass, and the \r was discarded. In this
|
|
|
511 # case we just throw away the \n at the start of the buffer.
|
|
|
512 if (self.lastdiscard, self.linebuffer[:1]) == (b'\r', b'\n'):
|
|
|
513 self.linebuffer = self.linebuffer[1:]
|
|
|
514
|
|
|
515 for sep in self.nlSeps:
|
|
|
516 nl = self.linebuffer.find(sep)
|
|
|
517 if nl >= 0:
|
|
|
518 nllen = len(sep)
|
|
|
519 return nl, nllen
|
|
|
520
|
|
|
521 return nl, nllen
|
|
|
522
|
|
|
523 def readline(self, size = -1):
|
|
|
524 """Read a line with approx. size. If size is negative,
|
|
|
525 read a whole line.
|
|
|
526 """
|
|
|
527 if size < 0:
|
|
|
528 size = sys.maxsize
|
|
|
529 elif size == 0:
|
|
|
530 return b''
|
|
|
531
|
|
|
532 # check for a newline already in buffer
|
|
|
533 nl, nllen = self._checkfornewline()
|
|
|
534
|
|
|
535 if nl >= 0:
|
|
|
536 # the next line was already in the buffer
|
|
|
537 nl = min(nl, size)
|
|
|
538 else:
|
|
|
539 # no line break in buffer - try to read more
|
|
|
540 size -= len(self.linebuffer)
|
|
|
541 while nl < 0 and size > 0:
|
|
|
542 buf = self.read(min(size, 100))
|
|
|
543 if not buf:
|
|
|
544 break
|
|
|
545 self.linebuffer += buf
|
|
|
546 size -= len(buf)
|
|
|
547
|
|
|
548 # check for a newline in buffer
|
|
|
549 nl, nllen = self._checkfornewline()
|
|
|
550
|
|
|
551 # we either ran out of bytes in the file, or
|
|
|
552 # met the specified size limit without finding a newline,
|
|
|
553 # so return current buffer
|
|
|
554 if nl < 0:
|
|
|
555 s = self.linebuffer
|
|
|
556 self.linebuffer = b''
|
|
|
557 return s
|
|
|
558
|
|
|
559 buf = self.linebuffer[:nl]
|
|
|
560 self.lastdiscard = self.linebuffer[nl:nl + nllen]
|
|
|
561 self.linebuffer = self.linebuffer[nl + nllen:]
|
|
|
562
|
|
|
563 # line is always returned with \n as newline char (except possibly
|
|
|
564 # for a final incomplete line in the file, which is handled above).
|
|
|
565 return buf + b"\n"
|
|
|
566
|
|
|
567 def readlines(self, sizehint = -1):
|
|
|
568 """Return a list with all (following) lines. The sizehint parameter
|
|
|
569 is ignored in this implementation.
|
|
|
570 """
|
|
|
571 result = []
|
|
|
572 while True:
|
|
|
573 line = self.readline()
|
|
|
574 if not line: break
|
|
|
575 result.append(line)
|
|
|
576 return result
|
|
|
577
|
|
|
578 def read(self, size = None):
|
|
|
579 # act like file obj and return empty string if size is 0
|
|
|
580 if size == 0:
|
|
|
581 return b''
|
|
|
582
|
|
|
583 # determine read size
|
|
|
584 bytesToRead = self.compress_size - self.bytes_read
|
|
|
585
|
|
|
586 # adjust read size for encrypted files since the first 12 bytes
|
|
|
587 # are for the encryption/password information
|
|
|
588 if self.decrypter is not None:
|
|
|
589 bytesToRead -= 12
|
|
|
590
|
|
|
591 if size is not None and size >= 0:
|
|
|
592 if self.compress_type == ZIP_STORED:
|
|
|
593 lr = len(self.readbuffer)
|
|
|
594 bytesToRead = min(bytesToRead, size - lr)
|
|
|
595 else:
|
|
|
596 if len(self.readbuffer) > size:
|
|
|
597 # the user has requested fewer bytes than we've already
|
|
|
598 # pulled through the decompressor; don't read any more
|
|
|
599 bytesToRead = 0
|
|
|
600 else:
|
|
|
601 # user will use up the buffer, so read some more
|
|
|
602 lr = len(self.rawbuffer)
|
|
|
603 bytesToRead = min(bytesToRead, self.compreadsize - lr)
|
|
|
604
|
|
|
605 # avoid reading past end of file contents
|
|
|
606 if bytesToRead + self.bytes_read > self.compress_size:
|
|
|
607 bytesToRead = self.compress_size - self.bytes_read
|
|
|
608
|
|
|
609 # try to read from file (if necessary)
|
|
|
610 if bytesToRead > 0:
|
|
|
611 data = self.fileobj.read(bytesToRead)
|
|
|
612 self.bytes_read += len(data)
|
|
|
613 try:
|
|
|
614 self.rawbuffer += data
|
|
|
615 except:
|
|
|
616 print(repr(self.fileobj), repr(self.rawbuffer),
|
|
|
617 repr(data))
|
|
|
618 raise
|
|
|
619
|
|
|
620 # handle contents of raw buffer
|
|
|
621 if self.rawbuffer:
|
|
|
622 newdata = self.rawbuffer
|
|
|
623 self.rawbuffer = b''
|
|
|
624
|
|
|
625 # decrypt new data if we were given an object to handle that
|
|
|
626 if newdata and self.decrypter is not None:
|
|
|
627 newdata = bytes(map(self.decrypter, newdata))
|
|
|
628
|
|
|
629 # decompress newly read data if necessary
|
|
|
630 if newdata and self.compress_type != ZIP_STORED:
|
|
|
631 newdata = self.dc.decompress(newdata)
|
|
|
632 self.rawbuffer = self.dc.unconsumed_tail if self.compress_type == ZIP_DEFLATED else ''
|
|
|
633 if self.eof and len(self.rawbuffer) == 0:
|
|
|
634 # we're out of raw bytes (both from the file and
|
|
|
635 # the local buffer); flush just to make sure the
|
|
|
636 # decompressor is done
|
|
|
637 if hasattr(self.dc, 'flush'):
|
|
|
638 newdata += self.dc.flush()
|
|
|
639 # prevent decompressor from being used again
|
|
|
640 self.dc = None
|
|
|
641
|
|
|
642 self.readbuffer += newdata
|
|
|
643
|
|
|
644
|
|
|
645 # return what the user asked for
|
|
|
646 if size is None or len(self.readbuffer) <= size:
|
|
|
647 data = self.readbuffer
|
|
|
648 self.readbuffer = b''
|
|
|
649 else:
|
|
|
650 data = self.readbuffer[:size]
|
|
|
651 self.readbuffer = self.readbuffer[size:]
|
|
|
652
|
|
|
653 return data
|
|
|
654
|
|
|
655
|
|
|
656 class ZipFile:
|
|
|
657 """ Class with methods to open, read, write, close, list zip files.
|
|
|
658
|
|
|
659 z = ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=False)
|
|
|
660
|
|
|
661 file: Either the path to the file, or a file-like object.
|
|
|
662 If it is a path, the file will be opened and closed by ZipFile.
|
|
|
663 mode: The mode can be either read "r", write "w" or append "a".
|
|
|
664 compression: ZIP_STORED (no compression), ZIP_DEFLATED (requires zlib),
|
|
|
665 or ZIP_BZIP2 (requires bz2).
|
|
|
666 allowZip64: if True ZipFile will create files with ZIP64 extensions when
|
|
|
667 needed, otherwise it will raise an exception when this would
|
|
|
668 be necessary.
|
|
|
669
|
|
|
670 """
|
|
|
671
|
|
|
672 fp = None # Set here since __del__ checks it
|
|
|
673
|
|
|
674 def __init__(self, file, mode="r", compression=ZIP_STORED, allowZip64=False):
|
|
|
675 """Open the ZIP file with mode read "r", write "w" or append "a"."""
|
|
|
676 if mode not in ("r", "w", "a"):
|
|
|
677 raise RuntimeError('ZipFile() requires mode "r", "w", or "a"')
|
|
|
678
|
|
|
679 if compression == ZIP_STORED:
|
|
|
680 pass
|
|
|
681 elif compression == ZIP_DEFLATED:
|
|
|
682 if not zlib:
|
|
|
683 raise RuntimeError(
|
|
|
684 "Compression requires the (missing) zlib module")
|
|
|
685 elif compression == ZIP_BZIP2:
|
|
|
686 if not bz2:
|
|
|
687 raise RuntimeError(
|
|
|
688 "Compression requires the (missing) bz2 module")
|
|
|
689 else:
|
|
|
690 raise RuntimeError("That compression method is not supported")
|
|
|
691
|
|
|
692 self._allowZip64 = allowZip64
|
|
|
693 self._didModify = False
|
|
|
694 self.debug = 0 # Level of printing: 0 through 3
|
|
|
695 self.NameToInfo = {} # Find file info given name
|
|
|
696 self.filelist = [] # List of ZipInfo instances for archive
|
|
|
697 self.compression = compression # Method of compression
|
|
|
698 self.mode = key = mode.replace('b', '')[0]
|
|
|
699 self.pwd = None
|
|
|
700 self.comment = b''
|
|
|
701
|
|
|
702 # Check if we were passed a file-like object
|
|
|
703 if isinstance(file, str):
|
|
|
704 # No, it's a filename
|
|
|
705 self._filePassed = 0
|
|
|
706 self.filename = file
|
|
|
707 modeDict = {'r' : 'rb', 'w': 'wb', 'a' : 'r+b'}
|
|
|
708 try:
|
|
|
709 self.fp = io.open(file, modeDict[mode])
|
|
|
710 except IOError:
|
|
|
711 if mode == 'a':
|
|
|
712 mode = key = 'w'
|
|
|
713 self.fp = io.open(file, modeDict[mode])
|
|
|
714 else:
|
|
|
715 raise
|
|
|
716 else:
|
|
|
717 self._filePassed = 1
|
|
|
718 self.fp = file
|
|
|
719 self.filename = getattr(file, 'name', None)
|
|
|
720
|
|
|
721 if key == 'r':
|
|
|
722 self._GetContents()
|
|
|
723 elif key == 'w':
|
|
|
724 pass
|
|
|
725 elif key == 'a':
|
|
|
726 try: # See if file is a zip file
|
|
|
727 self._RealGetContents()
|
|
|
728 # seek to start of directory and overwrite
|
|
|
729 self.fp.seek(self.start_dir, 0)
|
|
|
730 except BadZipfile: # file is not a zip file, just append
|
|
|
731 self.fp.seek(0, 2)
|
|
|
732 else:
|
|
|
733 if not self._filePassed:
|
|
|
734 self.fp.close()
|
|
|
735 self.fp = None
|
|
|
736 raise RuntimeError('Mode must be "r", "w" or "a"')
|
|
|
737
|
|
|
738 def _GetContents(self):
|
|
|
739 """Read the directory, making sure we close the file if the format
|
|
|
740 is bad."""
|
|
|
741 try:
|
|
|
742 self._RealGetContents()
|
|
|
743 except BadZipfile:
|
|
|
744 if not self._filePassed:
|
|
|
745 self.fp.close()
|
|
|
746 self.fp = None
|
|
|
747 raise
|
|
|
748
|
|
|
749 def _RealGetContents(self):
|
|
|
750 """Read in the table of contents for the ZIP file."""
|
|
|
751 fp = self.fp
|
|
|
752 endrec = _EndRecData(fp)
|
|
|
753 if not endrec:
|
|
|
754 raise BadZipfile("File is not a zip file")
|
|
|
755 if self.debug > 1:
|
|
|
756 print(endrec)
|
|
|
757 size_cd = endrec[_ECD_SIZE] # bytes in central directory
|
|
|
758 offset_cd = endrec[_ECD_OFFSET] # offset of central directory
|
|
|
759 self.comment = endrec[_ECD_COMMENT] # archive comment
|
|
|
760
|
|
|
761 # "concat" is zero, unless zip was concatenated to another file
|
|
|
762 concat = endrec[_ECD_LOCATION] - size_cd - offset_cd
|
|
|
763 if endrec[_ECD_SIGNATURE] == stringEndArchive64:
|
|
|
764 # If Zip64 extension structures are present, account for them
|
|
|
765 concat -= (sizeEndCentDir64 + sizeEndCentDir64Locator)
|
|
|
766
|
|
|
767 if self.debug > 2:
|
|
|
768 inferred = concat + offset_cd
|
|
|
769 print("given, inferred, offset", offset_cd, inferred, concat)
|
|
|
770 # self.start_dir: Position of start of central directory
|
|
|
771 self.start_dir = offset_cd + concat
|
|
|
772 fp.seek(self.start_dir, 0)
|
|
|
773 data = fp.read(size_cd)
|
|
|
774 fp = io.BytesIO(data)
|
|
|
775 total = 0
|
|
|
776 while total < size_cd:
|
|
|
777 centdir = fp.read(sizeCentralDir)
|
|
|
778 if centdir[0:4] != stringCentralDir:
|
|
|
779 raise BadZipfile("Bad magic number for central directory")
|
|
|
780 centdir = struct.unpack(structCentralDir, centdir)
|
|
|
781 if self.debug > 2:
|
|
|
782 print(centdir)
|
|
|
783 filename = fp.read(centdir[_CD_FILENAME_LENGTH])
|
|
|
784 flags = centdir[5]
|
|
|
785 if flags & 0x800:
|
|
|
786 # UTF-8 file names extension
|
|
|
787 filename = filename.decode('utf-8')
|
|
|
788 else:
|
|
|
789 # Historical ZIP filename encoding
|
|
|
790 filename = filename.decode('cp437')
|
|
|
791 # Create ZipInfo instance to store file information
|
|
|
792 x = ZipInfo(filename)
|
|
|
793 x.extra = fp.read(centdir[_CD_EXTRA_FIELD_LENGTH])
|
|
|
794 x.comment = fp.read(centdir[_CD_COMMENT_LENGTH])
|
|
|
795 x.header_offset = centdir[_CD_LOCAL_HEADER_OFFSET]
|
|
|
796 (x.create_version, x.create_system, x.extract_version, x.reserved,
|
|
|
797 x.flag_bits, x.compress_type, t, d,
|
|
|
798 x.CRC, x.compress_size, x.file_size) = centdir[1:12]
|
|
|
799 x.volume, x.internal_attr, x.external_attr = centdir[15:18]
|
|
|
800 # Convert date/time code to (year, month, day, hour, min, sec)
|
|
|
801 x._raw_time = t
|
|
|
802 x.date_time = ( (d>>9)+1980, (d>>5)&0xF, d&0x1F,
|
|
|
803 t>>11, (t>>5)&0x3F, (t&0x1F) * 2 )
|
|
|
804
|
|
|
805 x._decodeExtra()
|
|
|
806 x.header_offset = x.header_offset + concat
|
|
|
807 self.filelist.append(x)
|
|
|
808 self.NameToInfo[x.filename] = x
|
|
|
809
|
|
|
810 # update total bytes read from central directory
|
|
|
811 total = (total + sizeCentralDir + centdir[_CD_FILENAME_LENGTH]
|
|
|
812 + centdir[_CD_EXTRA_FIELD_LENGTH]
|
|
|
813 + centdir[_CD_COMMENT_LENGTH])
|
|
|
814
|
|
|
815 if self.debug > 2:
|
|
|
816 print("total", total)
|
|
|
817
|
|
|
818
|
|
|
819 def namelist(self):
|
|
|
820 """Return a list of file names in the archive."""
|
|
|
821 l = []
|
|
|
822 for data in self.filelist:
|
|
|
823 l.append(data.filename)
|
|
|
824 return l
|
|
|
825
|
|
|
826 def infolist(self):
|
|
|
827 """Return a list of class ZipInfo instances for files in the
|
|
|
828 archive."""
|
|
|
829 return self.filelist
|
|
|
830
|
|
|
831 def printdir(self, file=None):
|
|
|
832 """Print a table of contents for the zip file."""
|
|
|
833 print("%-46s %19s %12s" % ("File Name", "Modified ", "Size"),
|
|
|
834 file=file)
|
|
|
835 for zinfo in self.filelist:
|
|
|
836 date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time[:6]
|
|
|
837 print("%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size),
|
|
|
838 file=file)
|
|
|
839
|
|
|
840 def testzip(self):
|
|
|
841 """Read all the files and check the CRC."""
|
|
|
842 chunk_size = 2 ** 20
|
|
|
843 for zinfo in self.filelist:
|
|
|
844 try:
|
|
|
845 # Read by chunks, to avoid an OverflowError or a
|
|
|
846 # MemoryError with very large embedded files.
|
|
|
847 f = self.open(zinfo.filename, "r")
|
|
|
848 while f.read(chunk_size): # Check CRC-32
|
|
|
849 pass
|
|
|
850 except BadZipfile:
|
|
|
851 return zinfo.filename
|
|
|
852
|
|
|
853 def getinfo(self, name):
|
|
|
854 """Return the instance of ZipInfo given 'name'."""
|
|
|
855 info = self.NameToInfo.get(name)
|
|
|
856 if info is None:
|
|
|
857 raise KeyError(
|
|
|
858 'There is no item named %r in the archive' % name)
|
|
|
859
|
|
|
860 return info
|
|
|
861
|
|
|
862 def setpassword(self, pwd):
|
|
|
863 """Set default password for encrypted files."""
|
|
|
864 assert isinstance(pwd, bytes)
|
|
|
865 self.pwd = pwd
|
|
|
866
|
|
|
867 def read(self, name, pwd=None):
|
|
|
868 """Return file bytes (as a string) for name."""
|
|
|
869 return self.open(name, "r", pwd).read()
|
|
|
870
|
|
|
871 def open(self, name, mode="r", pwd=None):
|
|
|
872 """Return file-like object for 'name'."""
|
|
|
873 if mode not in ("r", "U", "rU"):
|
|
|
874 raise RuntimeError('open() requires mode "r", "U", or "rU"')
|
|
|
875 if not self.fp:
|
|
|
876 raise RuntimeError(
|
|
|
877 "Attempt to read ZIP archive that was already closed")
|
|
|
878
|
|
|
879 # Only open a new file for instances where we were not
|
|
|
880 # given a file object in the constructor
|
|
|
881 if self._filePassed:
|
|
|
882 zef_file = self.fp
|
|
|
883 else:
|
|
|
884 zef_file = io.open(self.filename, 'rb')
|
|
|
885
|
|
|
886 # Make sure we have an info object
|
|
|
887 if isinstance(name, ZipInfo):
|
|
|
888 # 'name' is already an info object
|
|
|
889 zinfo = name
|
|
|
890 else:
|
|
|
891 # Get info object for name
|
|
|
892 zinfo = self.getinfo(name)
|
|
|
893
|
|
|
894 zef_file.seek(zinfo.header_offset, 0)
|
|
|
895
|
|
|
896 # Skip the file header:
|
|
|
897 fheader = zef_file.read(sizeFileHeader)
|
|
|
898 if fheader[0:4] != stringFileHeader:
|
|
|
899 raise BadZipfile("Bad magic number for file header")
|
|
|
900
|
|
|
901 fheader = struct.unpack(structFileHeader, fheader)
|
|
|
902 fname = zef_file.read(fheader[_FH_FILENAME_LENGTH])
|
|
|
903 if fheader[_FH_EXTRA_FIELD_LENGTH]:
|
|
|
904 zef_file.read(fheader[_FH_EXTRA_FIELD_LENGTH])
|
|
|
905
|
|
|
906 if fname != zinfo.orig_filename.encode("utf-8"):
|
|
|
907 raise BadZipfile(
|
|
|
908 'File name in directory %r and header %r differ.'
|
|
|
909 % (zinfo.orig_filename, fname))
|
|
|
910
|
|
|
911 # check for encrypted flag & handle password
|
|
|
912 is_encrypted = zinfo.flag_bits & 0x1
|
|
|
913 zd = None
|
|
|
914 if is_encrypted:
|
|
|
915 if not pwd:
|
|
|
916 pwd = self.pwd
|
|
|
917 if not pwd:
|
|
|
918 raise RuntimeError("File %s is encrypted, "
|
|
|
919 "password required for extraction" % name)
|
|
|
920
|
|
|
921 zd = _ZipDecrypter(pwd)
|
|
|
922 # The first 12 bytes in the cypher stream is an encryption header
|
|
|
923 # used to strengthen the algorithm. The first 11 bytes are
|
|
|
924 # completely random, while the 12th contains the MSB of the CRC,
|
|
|
925 # or the MSB of the file time depending on the header type
|
|
|
926 # and is used to check the correctness of the password.
|
|
|
927 bytes = zef_file.read(12)
|
|
|
928 h = list(map(zd, bytes[0:12]))
|
|
|
929 if zinfo.flag_bits & 0x8:
|
|
|
930 # compare against the file type from extended local headers
|
|
|
931 check_byte = (zinfo._raw_time >> 8) & 0xff
|
|
|
932 else:
|
|
|
933 # compare against the CRC otherwise
|
|
|
934 check_byte = (zinfo.CRC >> 24) & 0xff
|
|
|
935 if h[11] != check_byte:
|
|
|
936 raise RuntimeError("Bad password for file", name)
|
|
|
937
|
|
|
938 # build and return a ZipExtFile
|
|
|
939 if zd is None:
|
|
|
940 zef = ZipExtFile(zef_file, zinfo)
|
|
|
941 else:
|
|
|
942 zef = ZipExtFile(zef_file, zinfo, zd)
|
|
|
943
|
|
|
944 # set universal newlines on ZipExtFile if necessary
|
|
|
945 if "U" in mode:
|
|
|
946 zef.set_univ_newlines(True)
|
|
|
947 return zef
|
|
|
948
|
|
|
949 def extract(self, member, path=None, pwd=None):
|
|
|
950 """Extract a member from the archive to the current working directory,
|
|
|
951 using its full name. Its file information is extracted as accurately
|
|
|
952 as possible. `member' may be a filename or a ZipInfo object. You can
|
|
|
953 specify a different directory using `path'.
|
|
|
954 """
|
|
|
955 if not isinstance(member, ZipInfo):
|
|
|
956 member = self.getinfo(member)
|
|
|
957
|
|
|
958 if path is None:
|
|
|
959 path = os.getcwd()
|
|
|
960
|
|
|
961 return self._extract_member(member, path, pwd)
|
|
|
962
|
|
|
963 def extractall(self, path=None, members=None, pwd=None):
|
|
|
964 """Extract all members from the archive to the current working
|
|
|
965 directory. `path' specifies a different directory to extract to.
|
|
|
966 `members' is optional and must be a subset of the list returned
|
|
|
967 by namelist().
|
|
|
968 """
|
|
|
969 if members is None:
|
|
|
970 members = self.namelist()
|
|
|
971
|
|
|
972 for zipinfo in members:
|
|
|
973 self.extract(zipinfo, path, pwd)
|
|
|
974
|
|
|
975 def _extract_member(self, member, targetpath, pwd):
|
|
|
976 """Extract the ZipInfo object 'member' to a physical
|
|
|
977 file on the path targetpath.
|
|
|
978 """
|
|
|
979 # build the destination pathname, replacing
|
|
|
980 # forward slashes to platform specific separators.
|
|
|
981 # Strip trailing path separator, unless it represents the root.
|
|
|
982 if (targetpath[-1:] in (os.path.sep, os.path.altsep)
|
|
|
983 and len(os.path.splitdrive(targetpath)[1]) > 1):
|
|
|
984 targetpath = targetpath[:-1]
|
|
|
985
|
|
|
986 # don't include leading "/" from file name if present
|
|
|
987 if member.filename[0] == '/':
|
|
|
988 targetpath = os.path.join(targetpath, member.filename[1:])
|
|
|
989 else:
|
|
|
990 targetpath = os.path.join(targetpath, member.filename)
|
|
|
991
|
|
|
992 targetpath = os.path.normpath(targetpath)
|
|
|
993
|
|
|
994 # Create all upper directories if necessary.
|
|
|
995 upperdirs = os.path.dirname(targetpath)
|
|
|
996 if upperdirs and not os.path.exists(upperdirs):
|
|
|
997 os.makedirs(upperdirs)
|
|
|
998
|
|
|
999 if member.filename[-1] == '/':
|
|
|
1000 if not os.path.isdir(targetpath):
|
|
|
1001 os.mkdir(targetpath)
|
|
|
1002 return targetpath
|
|
|
1003
|
|
|
1004 source = self.open(member, pwd=pwd)
|
|
|
1005 target = open(targetpath, "wb")
|
|
|
1006 shutil.copyfileobj(source, target)
|
|
|
1007 source.close()
|
|
|
1008 target.close()
|
|
|
1009
|
|
|
1010 return targetpath
|
|
|
1011
|
|
|
1012 def _writecheck(self, zinfo):
|
|
|
1013 """Check for errors before writing a file to the archive."""
|
|
|
1014 if zinfo.filename in self.NameToInfo:
|
|
|
1015 if self.debug: # Warning for duplicate names
|
|
|
1016 print("Duplicate name:", zinfo.filename)
|
|
|
1017 if self.mode not in ("w", "a"):
|
|
|
1018 raise RuntimeError('write() requires mode "w" or "a"')
|
|
|
1019 if not self.fp:
|
|
|
1020 raise RuntimeError(
|
|
|
1021 "Attempt to write ZIP archive that was already closed")
|
|
|
1022 if zinfo.compress_type == ZIP_DEFLATED and not zlib:
|
|
|
1023 raise RuntimeError(
|
|
|
1024 "Compression requires the (missing) zlib module")
|
|
|
1025 if zinfo.compress_type == ZIP_BZIP2 and not bz2:
|
|
|
1026 raise RuntimeError(
|
|
|
1027 "Compression requires the (missing) bz2 module")
|
|
|
1028 if zinfo.compress_type not in (ZIP_STORED, ZIP_DEFLATED, ZIP_BZIP2):
|
|
|
1029 raise RuntimeError("That compression method is not supported")
|
|
|
1030 if zinfo.file_size > ZIP64_LIMIT:
|
|
|
1031 if not self._allowZip64:
|
|
|
1032 raise LargeZipFile("Filesize would require ZIP64 extensions")
|
|
|
1033 if zinfo.header_offset > ZIP64_LIMIT:
|
|
|
1034 if not self._allowZip64:
|
|
|
1035 raise LargeZipFile(
|
|
|
1036 "Zipfile size would require ZIP64 extensions")
|
|
|
1037
|
|
|
1038 def write(self, filename, arcname=None, compress_type=None):
|
|
|
1039 """Put the bytes from filename into the archive under the name
|
|
|
1040 arcname."""
|
|
|
1041 if not self.fp:
|
|
|
1042 raise RuntimeError(
|
|
|
1043 "Attempt to write to ZIP archive that was already closed")
|
|
|
1044
|
|
|
1045 st = os.stat(filename)
|
|
|
1046 isdir = stat.S_ISDIR(st.st_mode)
|
|
|
1047 mtime = time.localtime(st.st_mtime)
|
|
|
1048 date_time = mtime[0:6]
|
|
|
1049 # Create ZipInfo instance to store file information
|
|
|
1050 if arcname is None:
|
|
|
1051 arcname = filename
|
|
|
1052 arcname = os.path.normpath(os.path.splitdrive(arcname)[1])
|
|
|
1053 while arcname[0] in (os.sep, os.altsep):
|
|
|
1054 arcname = arcname[1:]
|
|
|
1055 if isdir:
|
|
|
1056 arcname += '/'
|
|
|
1057 zinfo = ZipInfo(arcname, date_time)
|
|
|
1058 zinfo.external_attr = (st[0] & 0xFFFF) << 16 # Unix attributes
|
|
|
1059 if compress_type is None:
|
|
|
1060 zinfo.compress_type = self.compression
|
|
|
1061 else:
|
|
|
1062 zinfo.compress_type = compress_type
|
|
|
1063
|
|
|
1064 zinfo.file_size = st.st_size
|
|
|
1065 zinfo.flag_bits = 0x00
|
|
|
1066 zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
|
1067
|
|
|
1068 self._writecheck(zinfo)
|
|
|
1069 self._didModify = True
|
|
|
1070
|
|
|
1071 if isdir:
|
|
|
1072 zinfo.file_size = 0
|
|
|
1073 zinfo.compress_size = 0
|
|
|
1074 zinfo.CRC = 0
|
|
|
1075 self.filelist.append(zinfo)
|
|
|
1076 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1077 self.fp.write(zinfo.FileHeader())
|
|
|
1078 return
|
|
|
1079
|
|
|
1080 with open(filename, "rb") as fp:
|
|
|
1081 # Must overwrite CRC and sizes with correct data later
|
|
|
1082 zinfo.CRC = CRC = 0
|
|
|
1083 zinfo.compress_size = compress_size = 0
|
|
|
1084 zinfo.file_size = file_size = 0
|
|
|
1085 self.fp.write(zinfo.FileHeader())
|
|
|
1086 if zinfo.compress_type == ZIP_DEFLATED:
|
|
|
1087 cmpr = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
|
1088 zlib.DEFLATED, -15)
|
|
|
1089 elif zinfo.compress_type == ZIP_BZIP2:
|
|
|
1090 cmpr = bz2.BZ2Compressor()
|
|
|
1091 else:
|
|
|
1092 cmpr = None
|
|
|
1093 while 1:
|
|
|
1094 buf = fp.read(1024 * 8)
|
|
|
1095 if not buf:
|
|
|
1096 break
|
|
|
1097 file_size = file_size + len(buf)
|
|
|
1098 CRC = crc32(buf, CRC) & 0xffffffff
|
|
|
1099 if cmpr:
|
|
|
1100 buf = cmpr.compress(buf)
|
|
|
1101 compress_size = compress_size + len(buf)
|
|
|
1102 self.fp.write(buf)
|
|
|
1103 if cmpr:
|
|
|
1104 buf = cmpr.flush()
|
|
|
1105 compress_size = compress_size + len(buf)
|
|
|
1106 self.fp.write(buf)
|
|
|
1107 zinfo.compress_size = compress_size
|
|
|
1108 else:
|
|
|
1109 zinfo.compress_size = file_size
|
|
|
1110 zinfo.CRC = CRC
|
|
|
1111 zinfo.file_size = file_size
|
|
|
1112 # Seek backwards and write CRC and file sizes
|
|
|
1113 position = self.fp.tell() # Preserve current position in file
|
|
|
1114 self.fp.seek(zinfo.header_offset + 14, 0)
|
|
|
1115 self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
|
|
|
1116 zinfo.file_size))
|
|
|
1117 self.fp.seek(position, 0)
|
|
|
1118 self.filelist.append(zinfo)
|
|
|
1119 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1120
|
|
|
1121 def writestr(self, zinfo_or_arcname, data):
|
|
|
1122 """Write a file into the archive. The contents is 'data', which
|
|
|
1123 may be either a 'str' or a 'bytes' instance; if it is a 'str',
|
|
|
1124 it is encoded as UTF-8 first.
|
|
|
1125 'zinfo_or_arcname' is either a ZipInfo instance or
|
|
|
1126 the name of the file in the archive."""
|
|
|
1127 if isinstance(data, str):
|
|
|
1128 data = data.encode("utf-8")
|
|
|
1129 if not isinstance(zinfo_or_arcname, ZipInfo):
|
|
|
1130 zinfo = ZipInfo(filename=zinfo_or_arcname,
|
|
|
1131 date_time=time.localtime(time.time())[:6])
|
|
|
1132 zinfo.compress_type = self.compression
|
|
|
1133 zinfo.external_attr = 0o600 << 16
|
|
|
1134 else:
|
|
|
1135 zinfo = zinfo_or_arcname
|
|
|
1136
|
|
|
1137 if not self.fp:
|
|
|
1138 raise RuntimeError(
|
|
|
1139 "Attempt to write to ZIP archive that was already closed")
|
|
|
1140
|
|
|
1141 zinfo.file_size = len(data) # Uncompressed size
|
|
|
1142 zinfo.header_offset = self.fp.tell() # Start of header data
|
|
|
1143 self._writecheck(zinfo)
|
|
|
1144 self._didModify = True
|
|
|
1145 zinfo.CRC = crc32(data) & 0xffffffff # CRC-32 checksum
|
|
|
1146 if zinfo.compress_type == ZIP_DEFLATED:
|
|
|
1147 co = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
|
1148 zlib.DEFLATED, -15)
|
|
|
1149 data = co.compress(data) + co.flush()
|
|
|
1150 zinfo.compress_size = len(data) # Compressed size
|
|
|
1151 elif zinfo.compress_type == ZIP_BZIP2:
|
|
|
1152 co = bz2.BZ2Compressor()
|
|
|
1153 data = co.compress(data) + co.flush()
|
|
|
1154 zinfo.compress_size = len(data) # Compressed size
|
|
|
1155 else:
|
|
|
1156 zinfo.compress_size = zinfo.file_size
|
|
|
1157 zinfo.header_offset = self.fp.tell() # Start of header data
|
|
|
1158 self.fp.write(zinfo.FileHeader())
|
|
|
1159 self.fp.write(data)
|
|
|
1160 self.fp.flush()
|
|
|
1161 if zinfo.flag_bits & 0x08:
|
|
|
1162 # Write CRC and file sizes after the file data
|
|
|
1163 self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
|
|
|
1164 zinfo.file_size))
|
|
|
1165 self.filelist.append(zinfo)
|
|
|
1166 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1167
|
|
|
1168 def __del__(self):
|
|
|
1169 """Call the "close()" method in case the user forgot."""
|
|
|
1170 self.close()
|
|
|
1171
|
|
|
1172 def close(self):
|
|
|
1173 """Close the file, and for mode "w" and "a" write the ending
|
|
|
1174 records."""
|
|
|
1175 if self.fp is None:
|
|
|
1176 return
|
|
|
1177
|
|
|
1178 if self.mode in ("w", "a") and self._didModify: # write ending records
|
|
|
1179 count = 0
|
|
|
1180 pos1 = self.fp.tell()
|
|
|
1181 for zinfo in self.filelist: # write central directory
|
|
|
1182 count = count + 1
|
|
|
1183 dt = zinfo.date_time
|
|
|
1184 dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
|
|
|
1185 dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
|
|
|
1186 extra = []
|
|
|
1187 if zinfo.file_size > ZIP64_LIMIT \
|
|
|
1188 or zinfo.compress_size > ZIP64_LIMIT:
|
|
|
1189 extra.append(zinfo.file_size)
|
|
|
1190 extra.append(zinfo.compress_size)
|
|
|
1191 file_size = 0xffffffff
|
|
|
1192 compress_size = 0xffffffff
|
|
|
1193 else:
|
|
|
1194 file_size = zinfo.file_size
|
|
|
1195 compress_size = zinfo.compress_size
|
|
|
1196
|
|
|
1197 if zinfo.header_offset > ZIP64_LIMIT:
|
|
|
1198 extra.append(zinfo.header_offset)
|
|
|
1199 header_offset = 0xffffffff
|
|
|
1200 else:
|
|
|
1201 header_offset = zinfo.header_offset
|
|
|
1202
|
|
|
1203 extra_data = zinfo.extra
|
|
|
1204 if extra:
|
|
|
1205 # Append a ZIP64 field to the extra's
|
|
|
1206 extra_data = struct.pack(
|
|
|
1207 '<HH' + 'Q'*len(extra),
|
|
|
1208 1, 8*len(extra), *extra) + extra_data
|
|
|
1209
|
|
|
1210 extract_version = max(45, zinfo.extract_version)
|
|
|
1211 create_version = max(45, zinfo.create_version)
|
|
|
1212 else:
|
|
|
1213 extract_version = zinfo.extract_version
|
|
|
1214 create_version = zinfo.create_version
|
|
|
1215
|
|
|
1216 try:
|
|
|
1217 filename, flag_bits = zinfo._encodeFilenameFlags()
|
|
|
1218 centdir = struct.pack(structCentralDir,
|
|
|
1219 stringCentralDir, create_version,
|
|
|
1220 zinfo.create_system, extract_version, zinfo.reserved,
|
|
|
1221 flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
|
1222 zinfo.CRC, compress_size, file_size,
|
|
|
1223 len(filename), len(extra_data), len(zinfo.comment),
|
|
|
1224 0, zinfo.internal_attr, zinfo.external_attr,
|
|
|
1225 header_offset)
|
|
|
1226 except DeprecationWarning:
|
|
|
1227 print((structCentralDir, stringCentralDir, create_version,
|
|
|
1228 zinfo.create_system, extract_version, zinfo.reserved,
|
|
|
1229 zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
|
1230 zinfo.CRC, compress_size, file_size,
|
|
|
1231 len(zinfo.filename), len(extra_data), len(zinfo.comment),
|
|
|
1232 0, zinfo.internal_attr, zinfo.external_attr,
|
|
|
1233 header_offset), file=sys.stderr)
|
|
|
1234 raise
|
|
|
1235 self.fp.write(centdir)
|
|
|
1236 self.fp.write(filename)
|
|
|
1237 self.fp.write(extra_data)
|
|
|
1238 self.fp.write(zinfo.comment)
|
|
|
1239
|
|
|
1240 pos2 = self.fp.tell()
|
|
|
1241 # Write end-of-zip-archive record
|
|
|
1242 centDirCount = count
|
|
|
1243 centDirSize = pos2 - pos1
|
|
|
1244 centDirOffset = pos1
|
|
|
1245 if (centDirCount >= ZIP_FILECOUNT_LIMIT or
|
|
|
1246 centDirOffset > ZIP64_LIMIT or
|
|
|
1247 centDirSize > ZIP64_LIMIT):
|
|
|
1248 # Need to write the ZIP64 end-of-archive records
|
|
|
1249 zip64endrec = struct.pack(
|
|
|
1250 structEndArchive64, stringEndArchive64,
|
|
|
1251 44, 45, 45, 0, 0, centDirCount, centDirCount,
|
|
|
1252 centDirSize, centDirOffset)
|
|
|
1253 self.fp.write(zip64endrec)
|
|
|
1254
|
|
|
1255 zip64locrec = struct.pack(
|
|
|
1256 structEndArchive64Locator,
|
|
|
1257 stringEndArchive64Locator, 0, pos2, 1)
|
|
|
1258 self.fp.write(zip64locrec)
|
|
|
1259 centDirCount = min(centDirCount, 0xFFFF)
|
|
|
1260 centDirSize = min(centDirSize, 0xFFFFFFFF)
|
|
|
1261 centDirOffset = min(centDirOffset, 0xFFFFFFFF)
|
|
|
1262
|
|
|
1263 # check for valid comment length
|
|
|
1264 if len(self.comment) >= ZIP_MAX_COMMENT:
|
|
|
1265 if self.debug > 0:
|
|
|
1266 msg = 'Archive comment is too long; truncating to %d bytes' \
|
|
|
1267 % ZIP_MAX_COMMENT
|
|
|
1268 self.comment = self.comment[:ZIP_MAX_COMMENT]
|
|
|
1269
|
|
|
1270 endrec = struct.pack(structEndArchive, stringEndArchive,
|
|
|
1271 0, 0, centDirCount, centDirCount,
|
|
|
1272 centDirSize, centDirOffset, len(self.comment))
|
|
|
1273 self.fp.write(endrec)
|
|
|
1274 self.fp.write(self.comment)
|
|
|
1275 self.fp.flush()
|
|
|
1276
|
|
|
1277 if not self._filePassed:
|
|
|
1278 self.fp.close()
|
|
|
1279 self.fp = None
|
|
|
1280
|
|
|
1281
|
|
|
1282 class PyZipFile(ZipFile):
|
|
|
1283 """Class to create ZIP archives with Python library files and packages."""
|
|
|
1284
|
|
|
1285 def writepy(self, pathname, basename=""):
|
|
|
1286 """Add all files from "pathname" to the ZIP archive.
|
|
|
1287
|
|
|
1288 If pathname is a package directory, search the directory and
|
|
|
1289 all package subdirectories recursively for all *.py and enter
|
|
|
1290 the modules into the archive. If pathname is a plain
|
|
|
1291 directory, listdir *.py and enter all modules. Else, pathname
|
|
|
1292 must be a Python *.py file and the module will be put into the
|
|
|
1293 archive. Added modules are always module.pyo or module.pyc.
|
|
|
1294 This method will compile the module.py into module.pyc if
|
|
|
1295 necessary.
|
|
|
1296 """
|
|
|
1297 dir, name = os.path.split(pathname)
|
|
|
1298 if os.path.isdir(pathname):
|
|
|
1299 initname = os.path.join(pathname, "__init__.py")
|
|
|
1300 if os.path.isfile(initname):
|
|
|
1301 # This is a package directory, add it
|
|
|
1302 if basename:
|
|
|
1303 basename = "%s/%s" % (basename, name)
|
|
|
1304 else:
|
|
|
1305 basename = name
|
|
|
1306 if self.debug:
|
|
|
1307 print("Adding package in", pathname, "as", basename)
|
|
|
1308 fname, arcname = self._get_codename(initname[0:-3], basename)
|
|
|
1309 if self.debug:
|
|
|
1310 print("Adding", arcname)
|
|
|
1311 self.write(fname, arcname)
|
|
|
1312 dirlist = os.listdir(pathname)
|
|
|
1313 dirlist.remove("__init__.py")
|
|
|
1314 # Add all *.py files and package subdirectories
|
|
|
1315 for filename in dirlist:
|
|
|
1316 path = os.path.join(pathname, filename)
|
|
|
1317 root, ext = os.path.splitext(filename)
|
|
|
1318 if os.path.isdir(path):
|
|
|
1319 if os.path.isfile(os.path.join(path, "__init__.py")):
|
|
|
1320 # This is a package directory, add it
|
|
|
1321 self.writepy(path, basename) # Recursive call
|
|
|
1322 elif ext == ".py":
|
|
|
1323 fname, arcname = self._get_codename(path[0:-3],
|
|
|
1324 basename)
|
|
|
1325 if self.debug:
|
|
|
1326 print("Adding", arcname)
|
|
|
1327 self.write(fname, arcname)
|
|
|
1328 else:
|
|
|
1329 # This is NOT a package directory, add its files at top level
|
|
|
1330 if self.debug:
|
|
|
1331 print("Adding files from directory", pathname)
|
|
|
1332 for filename in os.listdir(pathname):
|
|
|
1333 path = os.path.join(pathname, filename)
|
|
|
1334 root, ext = os.path.splitext(filename)
|
|
|
1335 if ext == ".py":
|
|
|
1336 fname, arcname = self._get_codename(path[0:-3],
|
|
|
1337 basename)
|
|
|
1338 if self.debug:
|
|
|
1339 print("Adding", arcname)
|
|
|
1340 self.write(fname, arcname)
|
|
|
1341 else:
|
|
|
1342 if pathname[-3:] != ".py":
|
|
|
1343 raise RuntimeError(
|
|
|
1344 'Files added with writepy() must end with ".py"')
|
|
|
1345 fname, arcname = self._get_codename(pathname[0:-3], basename)
|
|
|
1346 if self.debug:
|
|
|
1347 print("Adding file", arcname)
|
|
|
1348 self.write(fname, arcname)
|
|
|
1349
|
|
|
1350 def _get_codename(self, pathname, basename):
|
|
|
1351 """Return (filename, archivename) for the path.
|
|
|
1352
|
|
|
1353 Given a module name path, return the correct file path and
|
|
|
1354 archive name, compiling if necessary. For example, given
|
|
|
1355 /python/lib/string, return (/python/lib/string.pyc, string).
|
|
|
1356 """
|
|
|
1357 file_py = pathname + ".py"
|
|
|
1358 file_pyc = pathname + ".pyc"
|
|
|
1359 file_pyo = pathname + ".pyo"
|
|
|
1360 if os.path.isfile(file_pyo) and \
|
|
|
1361 os.stat(file_pyo).st_mtime >= os.stat(file_py).st_mtime:
|
|
|
1362 fname = file_pyo # Use .pyo file
|
|
|
1363 elif not os.path.isfile(file_pyc) or \
|
|
|
1364 os.stat(file_pyc).st_mtime < os.stat(file_py).st_mtime:
|
|
|
1365 import py_compile
|
|
|
1366 if self.debug:
|
|
|
1367 print("Compiling", file_py)
|
|
|
1368 try:
|
|
|
1369 py_compile.compile(file_py, file_pyc, None, True)
|
|
|
1370 except py_compile.PyCompileError as err:
|
|
|
1371 print(err.msg)
|
|
|
1372 fname = file_pyc
|
|
|
1373 else:
|
|
|
1374 fname = file_pyc
|
|
|
1375 archivename = os.path.split(fname)[1]
|
|
|
1376 if basename:
|
|
|
1377 archivename = "%s/%s" % (basename, archivename)
|
|
|
1378 return (fname, archivename)
|
|
|
1379
|
|
|
1380
|
|
|
1381 def main(args = None):
|
|
|
1382 import textwrap
|
|
|
1383 USAGE=textwrap.dedent("""\
|
|
|
1384 Usage:
|
|
|
1385 zipfile.py -l zipfile.zip # Show listing of a zipfile
|
|
|
1386 zipfile.py -t zipfile.zip # Test if a zipfile is valid
|
|
|
1387 zipfile.py -e zipfile.zip target # Extract zipfile into target dir
|
|
|
1388 zipfile.py -c zipfile.zip src ... # Create zipfile from sources
|
|
|
1389 """)
|
|
|
1390 if args is None:
|
|
|
1391 args = sys.argv[1:]
|
|
|
1392
|
|
|
1393 if not args or args[0] not in ('-l', '-c', '-e', '-t'):
|
|
|
1394 print(USAGE)
|
|
|
1395 sys.exit(1)
|
|
|
1396
|
|
|
1397 if args[0] == '-l':
|
|
|
1398 if len(args) != 2:
|
|
|
1399 print(USAGE)
|
|
|
1400 sys.exit(1)
|
|
|
1401 zf = ZipFile(args[1], 'r')
|
|
|
1402 zf.printdir()
|
|
|
1403 zf.close()
|
|
|
1404
|
|
|
1405 elif args[0] == '-t':
|
|
|
1406 if len(args) != 2:
|
|
|
1407 print(USAGE)
|
|
|
1408 sys.exit(1)
|
|
|
1409 zf = ZipFile(args[1], 'r')
|
|
|
1410 zf.testzip()
|
|
|
1411 print("Done testing")
|
|
|
1412
|
|
|
1413 elif args[0] == '-e':
|
|
|
1414 if len(args) != 3:
|
|
|
1415 print(USAGE)
|
|
|
1416 sys.exit(1)
|
|
|
1417
|
|
|
1418 zf = ZipFile(args[1], 'r')
|
|
|
1419 out = args[2]
|
|
|
1420 for path in zf.namelist():
|
|
|
1421 if path.startswith('./'):
|
|
|
1422 tgt = os.path.join(out, path[2:])
|
|
|
1423 else:
|
|
|
1424 tgt = os.path.join(out, path)
|
|
|
1425
|
|
|
1426 tgtdir = os.path.dirname(tgt)
|
|
|
1427 if not os.path.exists(tgtdir):
|
|
|
1428 os.makedirs(tgtdir)
|
|
|
1429 with open(tgt, 'wb') as fp:
|
|
|
1430 fp.write(zf.read(path))
|
|
|
1431 zf.close()
|
|
|
1432
|
|
|
1433 elif args[0] == '-c':
|
|
|
1434 if len(args) < 3:
|
|
|
1435 print(USAGE)
|
|
|
1436 sys.exit(1)
|
|
|
1437
|
|
|
1438 def addToZip(zf, path, zippath):
|
|
|
1439 if os.path.isfile(path):
|
|
|
1440 zf.write(path, zippath, ZIP_DEFLATED)
|
|
|
1441 elif os.path.isdir(path):
|
|
|
1442 for nm in os.listdir(path):
|
|
|
1443 addToZip(zf,
|
|
|
1444 os.path.join(path, nm), os.path.join(zippath, nm))
|
|
|
1445 # else: ignore
|
|
|
1446
|
|
|
1447 zf = ZipFile(args[1], 'w', allowZip64=True)
|
|
|
1448 for src in args[2:]:
|
|
|
1449 addToZip(zf, src, os.path.basename(src))
|
|
|
1450
|
|
|
1451 zf.close()
|
|
|
1452
|
|
|
1453 if __name__ == "__main__":
|
|
|
1454 main()
|
