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7
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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 # Improved by Chortos-2 in 2009 (added bzip2 support)
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5 import struct, os, time, sys, shutil
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6 import binascii, cStringIO, stat
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7
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8 try:
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9 import zlib # We may need its compression method
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10 crc32 = zlib.crc32
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11 except ImportError:
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12 zlib = None
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13 crc32 = binascii.crc32
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14
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15 try:
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16 import bz2 # We may need its compression method
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17 except ImportError:
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18 bz2 = None
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19
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20 __all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",
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21 "ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile" ]
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22
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23 class BadZipfile(Exception):
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24 pass
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25
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26
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27 class LargeZipFile(Exception):
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28 """
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29 Raised when writing a zipfile, the zipfile requires ZIP64 extensions
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30 and those extensions are disabled.
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31 """
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32
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33 error = BadZipfile # The exception raised by this module
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34
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35 ZIP64_LIMIT = (1 << 31) - 1
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36 ZIP_FILECOUNT_LIMIT = 1 << 16
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37 ZIP_MAX_COMMENT = (1 << 16) - 1
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38
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39 # constants for Zip file compression methods
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40 ZIP_STORED = 0
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41 ZIP_DEFLATED = 8
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42 ZIP_BZIP2 = 12
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43 # Other ZIP compression methods not supported
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44
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45 # Below are some formats and associated data for reading/writing headers using
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46 # the struct module. The names and structures of headers/records are those used
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47 # in the PKWARE description of the ZIP file format:
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48 # http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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49 # (URL valid as of January 2008)
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50
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51 # The "end of central directory" structure, magic number, size, and indices
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52 # (section V.I in the format document)
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53 structEndArchive = "<4s4H2LH"
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54 stringEndArchive = "PK\005\006"
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55 sizeEndCentDir = struct.calcsize(structEndArchive)
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56
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57 _ECD_SIGNATURE = 0
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58 _ECD_DISK_NUMBER = 1
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59 _ECD_DISK_START = 2
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60 _ECD_ENTRIES_THIS_DISK = 3
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61 _ECD_ENTRIES_TOTAL = 4
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62 _ECD_SIZE = 5
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63 _ECD_OFFSET = 6
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64 _ECD_COMMENT_SIZE = 7
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65 # These last two indices are not part of the structure as defined in the
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66 # spec, but they are used internally by this module as a convenience
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67 _ECD_COMMENT = 8
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68 _ECD_LOCATION = 9
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69
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70 # The "central directory" structure, magic number, size, and indices
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71 # of entries in the structure (section V.F in the format document)
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72 structCentralDir = "<4s4B4HL2L5H2L"
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73 stringCentralDir = "PK\001\002"
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74 sizeCentralDir = struct.calcsize(structCentralDir)
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75
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76 # indexes of entries in the central directory structure
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77 _CD_SIGNATURE = 0
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78 _CD_CREATE_VERSION = 1
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79 _CD_CREATE_SYSTEM = 2
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80 _CD_EXTRACT_VERSION = 3
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81 _CD_EXTRACT_SYSTEM = 4
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82 _CD_FLAG_BITS = 5
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83 _CD_COMPRESS_TYPE = 6
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84 _CD_TIME = 7
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85 _CD_DATE = 8
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86 _CD_CRC = 9
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87 _CD_COMPRESSED_SIZE = 10
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88 _CD_UNCOMPRESSED_SIZE = 11
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89 _CD_FILENAME_LENGTH = 12
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90 _CD_EXTRA_FIELD_LENGTH = 13
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91 _CD_COMMENT_LENGTH = 14
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92 _CD_DISK_NUMBER_START = 15
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93 _CD_INTERNAL_FILE_ATTRIBUTES = 16
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94 _CD_EXTERNAL_FILE_ATTRIBUTES = 17
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95 _CD_LOCAL_HEADER_OFFSET = 18
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96
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97 # The "local file header" structure, magic number, size, and indices
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98 # (section V.A in the format document)
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99 structFileHeader = "<4s2B4HL2L2H"
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100 stringFileHeader = "PK\003\004"
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101 sizeFileHeader = struct.calcsize(structFileHeader)
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102
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103 _FH_SIGNATURE = 0
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104 _FH_EXTRACT_VERSION = 1
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105 _FH_EXTRACT_SYSTEM = 2
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106 _FH_GENERAL_PURPOSE_FLAG_BITS = 3
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107 _FH_COMPRESSION_METHOD = 4
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108 _FH_LAST_MOD_TIME = 5
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109 _FH_LAST_MOD_DATE = 6
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110 _FH_CRC = 7
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111 _FH_COMPRESSED_SIZE = 8
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112 _FH_UNCOMPRESSED_SIZE = 9
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113 _FH_FILENAME_LENGTH = 10
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114 _FH_EXTRA_FIELD_LENGTH = 11
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115
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116 # The "Zip64 end of central directory locator" structure, magic number, and size
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117 structEndArchive64Locator = "<4sLQL"
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118 stringEndArchive64Locator = "PK\x06\x07"
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119 sizeEndCentDir64Locator = struct.calcsize(structEndArchive64Locator)
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120
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121 # The "Zip64 end of central directory" record, magic number, size, and indices
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122 # (section V.G in the format document)
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123 structEndArchive64 = "<4sQ2H2L4Q"
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124 stringEndArchive64 = "PK\x06\x06"
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125 sizeEndCentDir64 = struct.calcsize(structEndArchive64)
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126
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127 _CD64_SIGNATURE = 0
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128 _CD64_DIRECTORY_RECSIZE = 1
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129 _CD64_CREATE_VERSION = 2
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130 _CD64_EXTRACT_VERSION = 3
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131 _CD64_DISK_NUMBER = 4
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132 _CD64_DISK_NUMBER_START = 5
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133 _CD64_NUMBER_ENTRIES_THIS_DISK = 6
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134 _CD64_NUMBER_ENTRIES_TOTAL = 7
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135 _CD64_DIRECTORY_SIZE = 8
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136 _CD64_OFFSET_START_CENTDIR = 9
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137
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138 def is_zipfile(filename):
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139 """Quickly see if file is a ZIP file by checking the magic number."""
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140 try:
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141 fpin = open(filename, "rb")
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142 endrec = _EndRecData(fpin)
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143 fpin.close()
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144 if endrec:
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145 return True # file has correct magic number
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146 except IOError:
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147 pass
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148 return False
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149
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150 def _EndRecData64(fpin, offset, endrec):
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151 """
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152 Read the ZIP64 end-of-archive records and use that to update endrec
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153 """
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154 fpin.seek(offset - sizeEndCentDir64Locator, 2)
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155 data = fpin.read(sizeEndCentDir64Locator)
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156 sig, diskno, reloff, disks = struct.unpack(structEndArchive64Locator, data)
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157 if sig != stringEndArchive64Locator:
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158 return endrec
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159
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160 if diskno != 0 or disks != 1:
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161 raise BadZipfile("zipfiles that span multiple disks are not supported")
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162
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163 # Assume no 'zip64 extensible data'
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164 fpin.seek(offset - sizeEndCentDir64Locator - sizeEndCentDir64, 2)
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165 data = fpin.read(sizeEndCentDir64)
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166 sig, sz, create_version, read_version, disk_num, disk_dir, \
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167 dircount, dircount2, dirsize, diroffset = \
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168 struct.unpack(structEndArchive64, data)
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169 if sig != stringEndArchive64:
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170 return endrec
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171
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172 # Update the original endrec using data from the ZIP64 record
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173 endrec[_ECD_SIGNATURE] = sig
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174 endrec[_ECD_DISK_NUMBER] = disk_num
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175 endrec[_ECD_DISK_START] = disk_dir
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176 endrec[_ECD_ENTRIES_THIS_DISK] = dircount
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177 endrec[_ECD_ENTRIES_TOTAL] = dircount2
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178 endrec[_ECD_SIZE] = dirsize
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179 endrec[_ECD_OFFSET] = diroffset
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180 return endrec
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181
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182
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183 def _EndRecData(fpin):
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184 """Return data from the "End of Central Directory" record, or None.
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185
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186 The data is a list of the nine items in the ZIP "End of central dir"
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187 record followed by a tenth item, the file seek offset of this record."""
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188
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189 # Determine file size
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190 fpin.seek(0, 2)
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191 filesize = fpin.tell()
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192
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193 # Check to see if this is ZIP file with no archive comment (the
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194 # "end of central directory" structure should be the last item in the
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195 # file if this is the case).
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196 fpin.seek(-sizeEndCentDir, 2)
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197 data = fpin.read()
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198 if data[0:4] == stringEndArchive and data[-2:] == "\000\000":
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199 # the signature is correct and there's no comment, unpack structure
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200 endrec = struct.unpack(structEndArchive, data)
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201 endrec=list(endrec)
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202
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203 # Append a blank comment and record start offset
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204 endrec.append("")
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205 endrec.append(filesize - sizeEndCentDir)
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206
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207 # Try to read the "Zip64 end of central directory" structure
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208 return _EndRecData64(fpin, -sizeEndCentDir, endrec)
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209
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210 # Either this is not a ZIP file, or it is a ZIP file with an archive
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211 # comment. Search the end of the file for the "end of central directory"
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212 # record signature. The comment is the last item in the ZIP file and may be
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213 # up to 64K long. It is assumed that the "end of central directory" magic
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214 # number does not appear in the comment.
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215 maxCommentStart = max(filesize - (1 << 16) - sizeEndCentDir, 0)
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216 fpin.seek(maxCommentStart, 0)
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217 data = fpin.read()
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218 start = data.rfind(stringEndArchive)
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219 if start >= 0:
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220 # found the magic number; attempt to unpack and interpret
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221 recData = data[start:start+sizeEndCentDir]
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222 endrec = list(struct.unpack(structEndArchive, recData))
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223 comment = data[start+sizeEndCentDir:]
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224 # check that comment length is correct
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225 if endrec[_ECD_COMMENT_SIZE] == len(comment):
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226 # Append the archive comment and start offset
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227 endrec.append(comment)
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228 endrec.append(maxCommentStart + start)
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229
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230 # Try to read the "Zip64 end of central directory" structure
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231 return _EndRecData64(fpin, maxCommentStart + start - filesize,
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232 endrec)
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233
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234 # Unable to find a valid end of central directory structure
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235 return
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236
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237
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238 class ZipInfo (object):
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239 """Class with attributes describing each file in the ZIP archive."""
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240
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241 __slots__ = (
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242 'orig_filename',
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243 'filename',
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244 'date_time',
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245 'compress_type',
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246 'comment',
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247 'extra',
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248 'create_system',
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249 'create_version',
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250 'extract_version',
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251 'reserved',
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252 'flag_bits',
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253 'volume',
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254 'internal_attr',
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255 'external_attr',
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256 'header_offset',
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257 'CRC',
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258 'compress_size',
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259 'file_size',
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260 '_raw_time',
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261 )
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262
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263 def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
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264 self.orig_filename = filename # Original file name in archive
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265
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266 # Terminate the file name at the first null byte. Null bytes in file
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267 # names are used as tricks by viruses in archives.
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268 null_byte = filename.find(chr(0))
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269 if null_byte >= 0:
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270 filename = filename[0:null_byte]
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271 # This is used to ensure paths in generated ZIP files always use
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272 # forward slashes as the directory separator, as required by the
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273 # ZIP format specification.
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274 if os.sep != "/" and os.sep in filename:
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275 filename = filename.replace(os.sep, "/")
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276
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277 self.filename = filename # Normalized file name
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278 self.date_time = date_time # year, month, day, hour, min, sec
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279 # Standard values:
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280 self.compress_type = ZIP_STORED # Type of compression for the file
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281 self.comment = "" # Comment for each file
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282 self.extra = "" # ZIP extra data
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283 if sys.platform == 'win32':
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284 self.create_system = 0 # System which created ZIP archive
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285 else:
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286 # Assume everything else is unix-y
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287 self.create_system = 3 # System which created ZIP archive
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288 self.create_version = 20 # Version which created ZIP archive
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289 self.extract_version = 20 # Version needed to extract archive
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290 self.reserved = 0 # Must be zero
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291 self.flag_bits = 0 # ZIP flag bits
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292 self.volume = 0 # Volume number of file header
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293 self.internal_attr = 0 # Internal attributes
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294 self.external_attr = 0 # External file attributes
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295 # Other attributes are set by class ZipFile:
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296 # header_offset Byte offset to the file header
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297 # CRC CRC-32 of the uncompressed file
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298 # compress_size Size of the compressed file
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299 # file_size Size of the uncompressed file
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300
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301 def FileHeader(self):
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302 """Return the per-file header as a string."""
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303 dt = self.date_time
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304 dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
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305 dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
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306 if self.flag_bits & 0x08:
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307 # Set these to zero because we write them after the file data
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308 CRC = compress_size = file_size = 0
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309 else:
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310 CRC = self.CRC
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311 compress_size = self.compress_size
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312 file_size = self.file_size
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313
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314 extra = self.extra
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315
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316 if file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT:
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317 # File is larger than what fits into a 4 byte integer,
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318 # fall back to the ZIP64 extension
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319 fmt = '<HHQQ'
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320 extra = extra + struct.pack(fmt,
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321 1, struct.calcsize(fmt)-4, file_size, compress_size)
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322 file_size = 0xffffffff
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323 compress_size = 0xffffffff
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324 self.extract_version = max(45, self.extract_version)
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325 self.create_version = max(45, self.extract_version)
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326
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327 filename, flag_bits = self._encodeFilenameFlags()
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328 header = struct.pack(structFileHeader, stringFileHeader,
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329 self.extract_version, self.reserved, flag_bits,
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330 self.compress_type, dostime, dosdate, CRC,
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331 compress_size, file_size,
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332 len(filename), len(extra))
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333 return header + filename + extra
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334
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335 def _encodeFilenameFlags(self):
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336 if isinstance(self.filename, unicode):
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337 try:
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338 return self.filename.encode('ascii'), self.flag_bits
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339 except UnicodeEncodeError:
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340 return self.filename.encode('utf-8'), self.flag_bits | 0x800
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341 else:
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342 return self.filename, self.flag_bits
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343
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344 def _decodeFilename(self):
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345 if self.flag_bits & 0x800:
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346 return self.filename.decode('utf-8')
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347 else:
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348 return self.filename
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349
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350 def _decodeExtra(self):
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351 # Try to decode the extra field.
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352 extra = self.extra
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353 unpack = struct.unpack
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354 while extra:
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355 tp, ln = unpack('<HH', extra[:4])
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356 if tp == 1:
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357 if ln >= 24:
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358 counts = unpack('<QQQ', extra[4:28])
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359 elif ln == 16:
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360 counts = unpack('<QQ', extra[4:20])
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361 elif ln == 8:
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362 counts = unpack('<Q', extra[4:12])
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363 elif ln == 0:
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364 counts = ()
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365 else:
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366 raise RuntimeError, "Corrupt extra field %s"%(ln,)
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367
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368 idx = 0
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369
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370 # ZIP64 extension (large files and/or large archives)
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371 if self.file_size in (0xffffffffffffffffL, 0xffffffffL):
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372 self.file_size = counts[idx]
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373 idx += 1
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374
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375 if self.compress_size == 0xFFFFFFFFL:
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376 self.compress_size = counts[idx]
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377 idx += 1
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378
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379 if self.header_offset == 0xffffffffL:
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380 old = self.header_offset
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381 self.header_offset = counts[idx]
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382 idx+=1
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383
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384 extra = extra[ln+4:]
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385
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386
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387 class _ZipDecrypter:
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388 """Class to handle decryption of files stored within a ZIP archive.
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389
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390 ZIP supports a password-based form of encryption. Even though known
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391 plaintext attacks have been found against it, it is still useful
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392 to be able to get data out of such a file.
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|
|
393
|
|
|
394 Usage:
|
|
|
395 zd = _ZipDecrypter(mypwd)
|
|
|
396 plain_char = zd(cypher_char)
|
|
|
397 plain_text = map(zd, cypher_text)
|
|
|
398 """
|
|
|
399
|
|
|
400 def _GenerateCRCTable():
|
|
|
401 """Generate a CRC-32 table.
|
|
|
402
|
|
|
403 ZIP encryption uses the CRC32 one-byte primitive for scrambling some
|
|
|
404 internal keys. We noticed that a direct implementation is faster than
|
|
|
405 relying on binascii.crc32().
|
|
|
406 """
|
|
|
407 poly = 0xedb88320
|
|
|
408 table = [0] * 256
|
|
|
409 for i in range(256):
|
|
|
410 crc = i
|
|
|
411 for j in range(8):
|
|
|
412 if crc & 1:
|
|
|
413 crc = ((crc >> 1) & 0x7FFFFFFF) ^ poly
|
|
|
414 else:
|
|
|
415 crc = ((crc >> 1) & 0x7FFFFFFF)
|
|
|
416 table[i] = crc
|
|
|
417 return table
|
|
|
418 crctable = _GenerateCRCTable()
|
|
|
419
|
|
|
420 def _crc32(self, ch, crc):
|
|
|
421 """Compute the CRC32 primitive on one byte."""
|
|
|
422 return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ord(ch)) & 0xff]
|
|
|
423
|
|
|
424 def __init__(self, pwd):
|
|
|
425 self.key0 = 305419896
|
|
|
426 self.key1 = 591751049
|
|
|
427 self.key2 = 878082192
|
|
|
428 for p in pwd:
|
|
|
429 self._UpdateKeys(p)
|
|
|
430
|
|
|
431 def _UpdateKeys(self, c):
|
|
|
432 self.key0 = self._crc32(c, self.key0)
|
|
|
433 self.key1 = (self.key1 + (self.key0 & 255)) & 4294967295
|
|
|
434 self.key1 = (self.key1 * 134775813 + 1) & 4294967295
|
|
|
435 self.key2 = self._crc32(chr((self.key1 >> 24) & 255), self.key2)
|
|
|
436
|
|
|
437 def __call__(self, c):
|
|
|
438 """Decrypt a single character."""
|
|
|
439 c = ord(c)
|
|
|
440 k = self.key2 | 2
|
|
|
441 c = c ^ (((k * (k^1)) >> 8) & 255)
|
|
|
442 c = chr(c)
|
|
|
443 self._UpdateKeys(c)
|
|
|
444 return c
|
|
|
445
|
|
|
446 class ZipExtFile:
|
|
|
447 """File-like object for reading an archive member.
|
|
|
448 Is returned by ZipFile.open().
|
|
|
449 """
|
|
|
450
|
|
|
451 def __init__(self, fileobj, zipinfo, decrypt=None):
|
|
|
452 self.fileobj = fileobj
|
|
|
453 self.decrypter = decrypt
|
|
|
454 self.bytes_read = 0L
|
|
|
455 self.rawbuffer = ''
|
|
|
456 self.readbuffer = ''
|
|
|
457 self.linebuffer = ''
|
|
|
458 self.eof = False
|
|
|
459 self.univ_newlines = False
|
|
|
460 self.nlSeps = ("\n", )
|
|
|
461 self.lastdiscard = ''
|
|
|
462
|
|
|
463 self.compress_type = zipinfo.compress_type
|
|
|
464 self.compress_size = zipinfo.compress_size
|
|
|
465
|
|
|
466 self.closed = False
|
|
|
467 self.mode = "r"
|
|
|
468 self.name = zipinfo.filename
|
|
|
469
|
|
|
470 # read from compressed files in 64k blocks
|
|
|
471 self.compreadsize = 64*1024
|
|
|
472 if self.compress_type == ZIP_DEFLATED:
|
|
|
473 self.dc = zlib.decompressobj(-15)
|
|
|
474 elif self.compress_type == ZIP_BZIP2:
|
|
|
475 self.dc = bz2.BZ2Decompressor()
|
|
|
476 self.compreadsize = 900000
|
|
|
477 elif self.compress_type != ZIP_STORED:
|
|
|
478 raise RuntimeError, "The compression method of this file is not supported"
|
|
|
479
|
|
|
480 def set_univ_newlines(self, univ_newlines):
|
|
|
481 self.univ_newlines = univ_newlines
|
|
|
482
|
|
|
483 # pick line separator char(s) based on universal newlines flag
|
|
|
484 self.nlSeps = ("\n", )
|
|
|
485 if self.univ_newlines:
|
|
|
486 self.nlSeps = ("\r\n", "\r", "\n")
|
|
|
487
|
|
|
488 def __iter__(self):
|
|
|
489 return self
|
|
|
490
|
|
|
491 def next(self):
|
|
|
492 nextline = self.readline()
|
|
|
493 if not nextline:
|
|
|
494 raise StopIteration()
|
|
|
495
|
|
|
496 return nextline
|
|
|
497
|
|
|
498 def close(self):
|
|
|
499 self.closed = True
|
|
|
500
|
|
|
501 def _checkfornewline(self):
|
|
|
502 nl, nllen = -1, -1
|
|
|
503 if self.linebuffer:
|
|
|
504 # ugly check for cases where half of an \r\n pair was
|
|
|
505 # read on the last pass, and the \r was discarded. In this
|
|
|
506 # case we just throw away the \n at the start of the buffer.
|
|
|
507 if (self.lastdiscard, self.linebuffer[0]) == ('\r','\n'):
|
|
|
508 self.linebuffer = self.linebuffer[1:]
|
|
|
509
|
|
|
510 for sep in self.nlSeps:
|
|
|
511 nl = self.linebuffer.find(sep)
|
|
|
512 if nl >= 0:
|
|
|
513 nllen = len(sep)
|
|
|
514 return nl, nllen
|
|
|
515
|
|
|
516 return nl, nllen
|
|
|
517
|
|
|
518 def readline(self, size = -1):
|
|
|
519 """Read a line with approx. size. If size is negative,
|
|
|
520 read a whole line.
|
|
|
521 """
|
|
|
522 if size < 0:
|
|
|
523 size = sys.maxint
|
|
|
524 elif size == 0:
|
|
|
525 return ''
|
|
|
526
|
|
|
527 # check for a newline already in buffer
|
|
|
528 nl, nllen = self._checkfornewline()
|
|
|
529
|
|
|
530 if nl >= 0:
|
|
|
531 # the next line was already in the buffer
|
|
|
532 nl = min(nl, size)
|
|
|
533 else:
|
|
|
534 # no line break in buffer - try to read more
|
|
|
535 size -= len(self.linebuffer)
|
|
|
536 while nl < 0 and size > 0:
|
|
|
537 buf = self.read(min(size, 100))
|
|
|
538 if not buf:
|
|
|
539 break
|
|
|
540 self.linebuffer += buf
|
|
|
541 size -= len(buf)
|
|
|
542
|
|
|
543 # check for a newline in buffer
|
|
|
544 nl, nllen = self._checkfornewline()
|
|
|
545
|
|
|
546 # we either ran out of bytes in the file, or
|
|
|
547 # met the specified size limit without finding a newline,
|
|
|
548 # so return current buffer
|
|
|
549 if nl < 0:
|
|
|
550 s = self.linebuffer
|
|
|
551 self.linebuffer = ''
|
|
|
552 return s
|
|
|
553
|
|
|
554 buf = self.linebuffer[:nl]
|
|
|
555 self.lastdiscard = self.linebuffer[nl:nl + nllen]
|
|
|
556 self.linebuffer = self.linebuffer[nl + nllen:]
|
|
|
557
|
|
|
558 # line is always returned with \n as newline char (except possibly
|
|
|
559 # for a final incomplete line in the file, which is handled above).
|
|
|
560 return buf + "\n"
|
|
|
561
|
|
|
562 def readlines(self, sizehint = -1):
|
|
|
563 """Return a list with all (following) lines. The sizehint parameter
|
|
|
564 is ignored in this implementation.
|
|
|
565 """
|
|
|
566 result = []
|
|
|
567 while True:
|
|
|
568 line = self.readline()
|
|
|
569 if not line: break
|
|
|
570 result.append(line)
|
|
|
571 return result
|
|
|
572
|
|
|
573 def read(self, size = None):
|
|
|
574 # act like file() obj and return empty string if size is 0
|
|
|
575 if size == 0:
|
|
|
576 return ''
|
|
|
577
|
|
|
578 # determine read size
|
|
|
579 bytesToRead = self.compress_size - self.bytes_read
|
|
|
580
|
|
|
581 # adjust read size for encrypted files since the first 12 bytes
|
|
|
582 # are for the encryption/password information
|
|
|
583 if self.decrypter is not None:
|
|
|
584 bytesToRead -= 12
|
|
|
585
|
|
|
586 if size is not None and size >= 0:
|
|
|
587 if self.compress_type == ZIP_STORED:
|
|
|
588 lr = len(self.readbuffer)
|
|
|
589 bytesToRead = min(bytesToRead, size - lr)
|
|
|
590 else:
|
|
|
591 if len(self.readbuffer) > size:
|
|
|
592 # the user has requested fewer bytes than we've already
|
|
|
593 # pulled through the decompressor; don't read any more
|
|
|
594 bytesToRead = 0
|
|
|
595 else:
|
|
|
596 # user will use up the buffer, so read some more
|
|
|
597 lr = len(self.rawbuffer)
|
|
|
598 bytesToRead = min(bytesToRead, self.compreadsize - lr)
|
|
|
599
|
|
|
600 # avoid reading past end of file contents
|
|
|
601 if bytesToRead + self.bytes_read > self.compress_size:
|
|
|
602 bytesToRead = self.compress_size - self.bytes_read
|
|
|
603
|
|
|
604 # try to read from file (if necessary)
|
|
|
605 if bytesToRead > 0:
|
|
|
606 bytes = self.fileobj.read(bytesToRead)
|
|
|
607 self.bytes_read += len(bytes)
|
|
|
608 self.rawbuffer += bytes
|
|
|
609
|
|
|
610 # handle contents of raw buffer
|
|
|
611 if self.rawbuffer:
|
|
|
612 newdata = self.rawbuffer
|
|
|
613 self.rawbuffer = ''
|
|
|
614
|
|
|
615 # decrypt new data if we were given an object to handle that
|
|
|
616 if newdata and self.decrypter is not None:
|
|
|
617 newdata = ''.join(map(self.decrypter, newdata))
|
|
|
618
|
|
|
619 # decompress newly read data if necessary
|
|
|
620 if newdata and self.compress_type != ZIP_STORED:
|
|
|
621 newdata = self.dc.decompress(newdata)
|
|
|
622 self.rawbuffer = self.dc.unconsumed_tail if self.compress_type == ZIP_DEFLATED else ''
|
|
|
623 if self.eof and len(self.rawbuffer) == 0:
|
|
|
624 # we're out of raw bytes (both from the file and
|
|
|
625 # the local buffer); flush just to make sure the
|
|
|
626 # decompressor is done
|
|
|
627 newdata += self.dc.flush()
|
|
|
628 # prevent decompressor from being used again
|
|
|
629 self.dc = None
|
|
|
630
|
|
|
631 self.readbuffer += newdata
|
|
|
632
|
|
|
633
|
|
|
634 # return what the user asked for
|
|
|
635 if size is None or len(self.readbuffer) <= size:
|
|
|
636 bytes = self.readbuffer
|
|
|
637 self.readbuffer = ''
|
|
|
638 else:
|
|
|
639 bytes = self.readbuffer[:size]
|
|
|
640 self.readbuffer = self.readbuffer[size:]
|
|
|
641
|
|
|
642 return bytes
|
|
|
643
|
|
|
644
|
|
|
645 class ZipFile:
|
|
|
646 """ Class with methods to open, read, write, close, list zip files.
|
|
|
647
|
|
|
648 z = ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=False)
|
|
|
649
|
|
|
650 file: Either the path to the file, or a file-like object.
|
|
|
651 If it is a path, the file will be opened and closed by ZipFile.
|
|
|
652 mode: The mode can be either read "r", write "w" or append "a".
|
|
|
653 compression: ZIP_STORED (no compression), ZIP_DEFLATED (requires zlib) or ZIP_BZIP2 (requires bz2).
|
|
|
654 allowZip64: if True ZipFile will create files with ZIP64 extensions when
|
|
|
655 needed, otherwise it will raise an exception when this would
|
|
|
656 be necessary.
|
|
|
657
|
|
|
658 """
|
|
|
659
|
|
|
660 fp = None # Set here since __del__ checks it
|
|
|
661
|
|
|
662 def __init__(self, file, mode="r", compression=ZIP_STORED, allowZip64=False):
|
|
|
663 """Open the ZIP file with mode read "r", write "w" or append "a"."""
|
|
|
664 if mode not in ("r", "w", "a"):
|
|
|
665 raise RuntimeError('ZipFile() requires mode "r", "w", or "a"')
|
|
|
666
|
|
|
667 if compression == ZIP_STORED:
|
|
|
668 pass
|
|
|
669 elif compression == ZIP_DEFLATED:
|
|
|
670 if not zlib:
|
|
|
671 raise RuntimeError,\
|
|
|
672 "Compression requires the (missing) zlib module"
|
|
|
673 elif compression == ZIP_BZIP2:
|
|
|
674 if not bz2:
|
|
|
675 raise RuntimeError,\
|
|
|
676 "Compression requires the (missing) bz2 module"
|
|
|
677 else:
|
|
|
678 raise RuntimeError, "That compression method is not supported"
|
|
|
679
|
|
|
680 self._allowZip64 = allowZip64
|
|
|
681 self._didModify = False
|
|
|
682 self.debug = 0 # Level of printing: 0 through 3
|
|
|
683 self.NameToInfo = {} # Find file info given name
|
|
|
684 self.filelist = [] # List of ZipInfo instances for archive
|
|
|
685 self.compression = compression # Method of compression
|
|
|
686 self.mode = key = mode.replace('b', '')[0]
|
|
|
687 self.pwd = None
|
|
|
688 self.comment = ''
|
|
|
689
|
|
|
690 # Check if we were passed a file-like object
|
|
|
691 if isinstance(file, basestring):
|
|
|
692 self._filePassed = 0
|
|
|
693 self.filename = file
|
|
|
694 modeDict = {'r' : 'rb', 'w': 'wb', 'a' : 'r+b'}
|
|
|
695 try:
|
|
|
696 self.fp = open(file, modeDict[mode])
|
|
|
697 except IOError:
|
|
|
698 if mode == 'a':
|
|
|
699 mode = key = 'w'
|
|
|
700 self.fp = open(file, modeDict[mode])
|
|
|
701 else:
|
|
|
702 raise
|
|
|
703 else:
|
|
|
704 self._filePassed = 1
|
|
|
705 self.fp = file
|
|
|
706 self.filename = getattr(file, 'name', None)
|
|
|
707
|
|
|
708 if key == 'r':
|
|
|
709 self._GetContents()
|
|
|
710 elif key == 'w':
|
|
|
711 pass
|
|
|
712 elif key == 'a':
|
|
|
713 try: # See if file is a zip file
|
|
|
714 self._RealGetContents()
|
|
|
715 # seek to start of directory and overwrite
|
|
|
716 self.fp.seek(self.start_dir, 0)
|
|
|
717 except BadZipfile: # file is not a zip file, just append
|
|
|
718 self.fp.seek(0, 2)
|
|
|
719 else:
|
|
|
720 if not self._filePassed:
|
|
|
721 self.fp.close()
|
|
|
722 self.fp = None
|
|
|
723 raise RuntimeError, 'Mode must be "r", "w" or "a"'
|
|
|
724
|
|
|
725 def _GetContents(self):
|
|
|
726 """Read the directory, making sure we close the file if the format
|
|
|
727 is bad."""
|
|
|
728 try:
|
|
|
729 self._RealGetContents()
|
|
|
730 except BadZipfile:
|
|
|
731 if not self._filePassed:
|
|
|
732 self.fp.close()
|
|
|
733 self.fp = None
|
|
|
734 raise
|
|
|
735
|
|
|
736 def _RealGetContents(self):
|
|
|
737 """Read in the table of contents for the ZIP file."""
|
|
|
738 fp = self.fp
|
|
|
739 endrec = _EndRecData(fp)
|
|
|
740 if not endrec:
|
|
|
741 raise BadZipfile, "File is not a zip file"
|
|
|
742 if self.debug > 1:
|
|
|
743 print endrec
|
|
|
744 size_cd = endrec[_ECD_SIZE] # bytes in central directory
|
|
|
745 offset_cd = endrec[_ECD_OFFSET] # offset of central directory
|
|
|
746 self.comment = endrec[_ECD_COMMENT] # archive comment
|
|
|
747
|
|
|
748 # "concat" is zero, unless zip was concatenated to another file
|
|
|
749 concat = endrec[_ECD_LOCATION] - size_cd - offset_cd
|
|
|
750 if endrec[_ECD_SIGNATURE] == stringEndArchive64:
|
|
|
751 # If Zip64 extension structures are present, account for them
|
|
|
752 concat -= (sizeEndCentDir64 + sizeEndCentDir64Locator)
|
|
|
753
|
|
|
754 if self.debug > 2:
|
|
|
755 inferred = concat + offset_cd
|
|
|
756 print "given, inferred, offset", offset_cd, inferred, concat
|
|
|
757 # self.start_dir: Position of start of central directory
|
|
|
758 self.start_dir = offset_cd + concat
|
|
|
759 fp.seek(self.start_dir, 0)
|
|
|
760 data = fp.read(size_cd)
|
|
|
761 fp = cStringIO.StringIO(data)
|
|
|
762 total = 0
|
|
|
763 while total < size_cd:
|
|
|
764 centdir = fp.read(sizeCentralDir)
|
|
|
765 if centdir[0:4] != stringCentralDir:
|
|
|
766 raise BadZipfile, "Bad magic number for central directory"
|
|
|
767 centdir = struct.unpack(structCentralDir, centdir)
|
|
|
768 if self.debug > 2:
|
|
|
769 print centdir
|
|
|
770 filename = fp.read(centdir[_CD_FILENAME_LENGTH])
|
|
|
771 # Create ZipInfo instance to store file information
|
|
|
772 x = ZipInfo(filename)
|
|
|
773 x.extra = fp.read(centdir[_CD_EXTRA_FIELD_LENGTH])
|
|
|
774 x.comment = fp.read(centdir[_CD_COMMENT_LENGTH])
|
|
|
775 x.header_offset = centdir[_CD_LOCAL_HEADER_OFFSET]
|
|
|
776 (x.create_version, x.create_system, x.extract_version, x.reserved,
|
|
|
777 x.flag_bits, x.compress_type, t, d,
|
|
|
778 x.CRC, x.compress_size, x.file_size) = centdir[1:12]
|
|
|
779 x.volume, x.internal_attr, x.external_attr = centdir[15:18]
|
|
|
780 # Convert date/time code to (year, month, day, hour, min, sec)
|
|
|
781 x._raw_time = t
|
|
|
782 x.date_time = ( (d>>9)+1980, (d>>5)&0xF, d&0x1F,
|
|
|
783 t>>11, (t>>5)&0x3F, (t&0x1F) * 2 )
|
|
|
784
|
|
|
785 x._decodeExtra()
|
|
|
786 x.header_offset = x.header_offset + concat
|
|
|
787 x.filename = x._decodeFilename()
|
|
|
788 self.filelist.append(x)
|
|
|
789 self.NameToInfo[x.filename] = x
|
|
|
790
|
|
|
791 # update total bytes read from central directory
|
|
|
792 total = (total + sizeCentralDir + centdir[_CD_FILENAME_LENGTH]
|
|
|
793 + centdir[_CD_EXTRA_FIELD_LENGTH]
|
|
|
794 + centdir[_CD_COMMENT_LENGTH])
|
|
|
795
|
|
|
796 if self.debug > 2:
|
|
|
797 print "total", total
|
|
|
798
|
|
|
799
|
|
|
800 def namelist(self):
|
|
|
801 """Return a list of file names in the archive."""
|
|
|
802 l = []
|
|
|
803 for data in self.filelist:
|
|
|
804 l.append(data.filename)
|
|
|
805 return l
|
|
|
806
|
|
|
807 def infolist(self):
|
|
|
808 """Return a list of class ZipInfo instances for files in the
|
|
|
809 archive."""
|
|
|
810 return self.filelist
|
|
|
811
|
|
|
812 def printdir(self):
|
|
|
813 """Print a table of contents for the zip file."""
|
|
|
814 print "%-46s %19s %12s" % ("File Name", "Modified ", "Size")
|
|
|
815 for zinfo in self.filelist:
|
|
|
816 date = "%d-%02d-%02d %02d:%02d:%02d" % zinfo.date_time[:6]
|
|
|
817 print "%-46s %s %12d" % (zinfo.filename, date, zinfo.file_size)
|
|
|
818
|
|
|
819 def testzip(self):
|
|
|
820 """Read all the files and check the CRC."""
|
|
|
821 chunk_size = 2 ** 20
|
|
|
822 for zinfo in self.filelist:
|
|
|
823 try:
|
|
|
824 # Read by chunks, to avoid an OverflowError or a
|
|
|
825 # MemoryError with very large embedded files.
|
|
|
826 f = self.open(zinfo.filename, "r")
|
|
|
827 while f.read(chunk_size): # Check CRC-32
|
|
|
828 pass
|
|
|
829 except BadZipfile:
|
|
|
830 return zinfo.filename
|
|
|
831
|
|
|
832 def getinfo(self, name):
|
|
|
833 """Return the instance of ZipInfo given 'name'."""
|
|
|
834 info = self.NameToInfo.get(name)
|
|
|
835 if info is None:
|
|
|
836 raise KeyError(
|
|
|
837 'There is no item named %r in the archive' % name)
|
|
|
838
|
|
|
839 return info
|
|
|
840
|
|
|
841 def setpassword(self, pwd):
|
|
|
842 """Set default password for encrypted files."""
|
|
|
843 self.pwd = pwd
|
|
|
844
|
|
|
845 def read(self, name, pwd=None):
|
|
|
846 """Return file bytes (as a string) for name."""
|
|
|
847 return self.open(name, "r", pwd).read()
|
|
|
848
|
|
|
849 def open(self, name, mode="r", pwd=None):
|
|
|
850 """Return file-like object for 'name'."""
|
|
|
851 if mode not in ("r", "U", "rU"):
|
|
|
852 raise RuntimeError, 'open() requires mode "r", "U", or "rU"'
|
|
|
853 if not self.fp:
|
|
|
854 raise RuntimeError, \
|
|
|
855 "Attempt to read ZIP archive that was already closed"
|
|
|
856
|
|
|
857 # Only open a new file for instances where we were not
|
|
|
858 # given a file object in the constructor
|
|
|
859 if self._filePassed:
|
|
|
860 zef_file = self.fp
|
|
|
861 else:
|
|
|
862 zef_file = open(self.filename, 'rb')
|
|
|
863
|
|
|
864 # Make sure we have an info object
|
|
|
865 if isinstance(name, ZipInfo):
|
|
|
866 # 'name' is already an info object
|
|
|
867 zinfo = name
|
|
|
868 else:
|
|
|
869 # Get info object for name
|
|
|
870 zinfo = self.getinfo(name)
|
|
|
871
|
|
|
872 zef_file.seek(zinfo.header_offset, 0)
|
|
|
873
|
|
|
874 # Skip the file header:
|
|
|
875 fheader = zef_file.read(sizeFileHeader)
|
|
|
876 if fheader[0:4] != stringFileHeader:
|
|
|
877 raise BadZipfile, "Bad magic number for file header"
|
|
|
878
|
|
|
879 fheader = struct.unpack(structFileHeader, fheader)
|
|
|
880 fname = zef_file.read(fheader[_FH_FILENAME_LENGTH])
|
|
|
881 if fheader[_FH_EXTRA_FIELD_LENGTH]:
|
|
|
882 zef_file.read(fheader[_FH_EXTRA_FIELD_LENGTH])
|
|
|
883
|
|
|
884 if fname != zinfo.orig_filename:
|
|
|
885 raise BadZipfile, \
|
|
|
886 'File name in directory "%s" and header "%s" differ.' % (
|
|
|
887 zinfo.orig_filename, fname)
|
|
|
888
|
|
|
889 # check for encrypted flag & handle password
|
|
|
890 is_encrypted = zinfo.flag_bits & 0x1
|
|
|
891 zd = None
|
|
|
892 if is_encrypted:
|
|
|
893 if not pwd:
|
|
|
894 pwd = self.pwd
|
|
|
895 if not pwd:
|
|
|
896 raise RuntimeError, "File %s is encrypted, " \
|
|
|
897 "password required for extraction" % name
|
|
|
898
|
|
|
899 zd = _ZipDecrypter(pwd)
|
|
|
900 # The first 12 bytes in the cypher stream is an encryption header
|
|
|
901 # used to strengthen the algorithm. The first 11 bytes are
|
|
|
902 # completely random, while the 12th contains the MSB of the CRC,
|
|
|
903 # or the MSB of the file time depending on the header type
|
|
|
904 # and is used to check the correctness of the password.
|
|
|
905 bytes = zef_file.read(12)
|
|
|
906 h = map(zd, bytes[0:12])
|
|
|
907 if zinfo.flag_bits & 0x8:
|
|
|
908 # compare against the file type from extended local headers
|
|
|
909 check_byte = (zinfo._raw_time >> 8) & 0xff
|
|
|
910 else:
|
|
|
911 # compare against the CRC otherwise
|
|
|
912 check_byte = (zinfo.CRC >> 24) & 0xff
|
|
|
913 if ord(h[11]) != check_byte:
|
|
|
914 raise RuntimeError("Bad password for file", name)
|
|
|
915
|
|
|
916 # build and return a ZipExtFile
|
|
|
917 if zd is None:
|
|
|
918 zef = ZipExtFile(zef_file, zinfo)
|
|
|
919 else:
|
|
|
920 zef = ZipExtFile(zef_file, zinfo, zd)
|
|
|
921
|
|
|
922 # set universal newlines on ZipExtFile if necessary
|
|
|
923 if "U" in mode:
|
|
|
924 zef.set_univ_newlines(True)
|
|
|
925 return zef
|
|
|
926
|
|
|
927 def extract(self, member, path=None, pwd=None):
|
|
|
928 """Extract a member from the archive to the current working directory,
|
|
|
929 using its full name. Its file information is extracted as accurately
|
|
|
930 as possible. `member' may be a filename or a ZipInfo object. You can
|
|
|
931 specify a different directory using `path'.
|
|
|
932 """
|
|
|
933 if not isinstance(member, ZipInfo):
|
|
|
934 member = self.getinfo(member)
|
|
|
935
|
|
|
936 if path is None:
|
|
|
937 path = os.getcwd()
|
|
|
938
|
|
|
939 return self._extract_member(member, path, pwd)
|
|
|
940
|
|
|
941 def extractall(self, path=None, members=None, pwd=None):
|
|
|
942 """Extract all members from the archive to the current working
|
|
|
943 directory. `path' specifies a different directory to extract to.
|
|
|
944 `members' is optional and must be a subset of the list returned
|
|
|
945 by namelist().
|
|
|
946 """
|
|
|
947 if members is None:
|
|
|
948 members = self.namelist()
|
|
|
949
|
|
|
950 for zipinfo in members:
|
|
|
951 self.extract(zipinfo, path, pwd)
|
|
|
952
|
|
|
953 def _extract_member(self, member, targetpath, pwd):
|
|
|
954 """Extract the ZipInfo object 'member' to a physical
|
|
|
955 file on the path targetpath.
|
|
|
956 """
|
|
|
957 # build the destination pathname, replacing
|
|
|
958 # forward slashes to platform specific separators.
|
|
|
959 # Strip trailing path separator, unless it represents the root.
|
|
|
960 if (targetpath[-1:] in (os.path.sep, os.path.altsep)
|
|
|
961 and len(os.path.splitdrive(targetpath)[1]) > 1):
|
|
|
962 targetpath = targetpath[:-1]
|
|
|
963
|
|
|
964 # don't include leading "/" from file name if present
|
|
|
965 if member.filename[0] == '/':
|
|
|
966 targetpath = os.path.join(targetpath, member.filename[1:])
|
|
|
967 else:
|
|
|
968 targetpath = os.path.join(targetpath, member.filename)
|
|
|
969
|
|
|
970 targetpath = os.path.normpath(targetpath)
|
|
|
971
|
|
|
972 # Create all upper directories if necessary.
|
|
|
973 upperdirs = os.path.dirname(targetpath)
|
|
|
974 if upperdirs and not os.path.exists(upperdirs):
|
|
|
975 os.makedirs(upperdirs)
|
|
|
976
|
|
|
977 if member.filename[-1] == '/':
|
|
|
978 if not os.path.isdir(targetpath):
|
|
|
979 os.mkdir(targetpath)
|
|
|
980 return targetpath
|
|
|
981
|
|
|
982 source = self.open(member, pwd=pwd)
|
|
|
983 target = file(targetpath, "wb")
|
|
|
984 shutil.copyfileobj(source, target)
|
|
|
985 source.close()
|
|
|
986 target.close()
|
|
|
987
|
|
|
988 return targetpath
|
|
|
989
|
|
|
990 def _writecheck(self, zinfo):
|
|
|
991 """Check for errors before writing a file to the archive."""
|
|
|
992 if zinfo.filename in self.NameToInfo:
|
|
|
993 if self.debug: # Warning for duplicate names
|
|
|
994 print "Duplicate name:", zinfo.filename
|
|
|
995 if self.mode not in ("w", "a"):
|
|
|
996 raise RuntimeError, 'write() requires mode "w" or "a"'
|
|
|
997 if not self.fp:
|
|
|
998 raise RuntimeError, \
|
|
|
999 "Attempt to write ZIP archive that was already closed"
|
|
|
1000 if zinfo.compress_type == ZIP_DEFLATED and not zlib:
|
|
|
1001 raise RuntimeError, \
|
|
|
1002 "Compression requires the (missing) zlib module"
|
|
|
1003 if zinfo.compress_type == ZIP_BZIP2 and not bz2:
|
|
|
1004 raise RuntimeError, \
|
|
|
1005 "Compression requires the (missing) bz2 module"
|
|
|
1006 if zinfo.compress_type not in (ZIP_STORED, ZIP_DEFLATED, ZIP_BZIP2):
|
|
|
1007 raise RuntimeError, \
|
|
|
1008 "That compression method is not supported"
|
|
|
1009 if zinfo.file_size > ZIP64_LIMIT:
|
|
|
1010 if not self._allowZip64:
|
|
|
1011 raise LargeZipFile("Filesize would require ZIP64 extensions")
|
|
|
1012 if zinfo.header_offset > ZIP64_LIMIT:
|
|
|
1013 if not self._allowZip64:
|
|
|
1014 raise LargeZipFile("Zipfile size would require ZIP64 extensions")
|
|
|
1015
|
|
|
1016 def write(self, filename, arcname=None, compress_type=None):
|
|
|
1017 """Put the bytes from filename into the archive under the name
|
|
|
1018 arcname."""
|
|
|
1019 if not self.fp:
|
|
|
1020 raise RuntimeError(
|
|
|
1021 "Attempt to write to ZIP archive that was already closed")
|
|
|
1022
|
|
|
1023 st = os.stat(filename)
|
|
|
1024 isdir = stat.S_ISDIR(st.st_mode)
|
|
|
1025 mtime = time.localtime(st.st_mtime)
|
|
|
1026 date_time = mtime[0:6]
|
|
|
1027 # Create ZipInfo instance to store file information
|
|
|
1028 if arcname is None:
|
|
|
1029 arcname = filename
|
|
|
1030 arcname = os.path.normpath(os.path.splitdrive(arcname)[1])
|
|
|
1031 while arcname[0] in (os.sep, os.altsep):
|
|
|
1032 arcname = arcname[1:]
|
|
|
1033 if isdir:
|
|
|
1034 arcname += '/'
|
|
|
1035 zinfo = ZipInfo(arcname, date_time)
|
|
|
1036 zinfo.external_attr = (st[0] & 0xFFFF) << 16L # Unix attributes
|
|
|
1037 if compress_type is None:
|
|
|
1038 zinfo.compress_type = self.compression
|
|
|
1039 else:
|
|
|
1040 zinfo.compress_type = compress_type
|
|
|
1041
|
|
|
1042 zinfo.file_size = st.st_size
|
|
|
1043 zinfo.flag_bits = 0x00
|
|
|
1044 zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
|
1045
|
|
|
1046 self._writecheck(zinfo)
|
|
|
1047 self._didModify = True
|
|
|
1048
|
|
|
1049 if isdir:
|
|
|
1050 zinfo.file_size = 0
|
|
|
1051 zinfo.compress_size = 0
|
|
|
1052 zinfo.CRC = 0
|
|
|
1053 self.filelist.append(zinfo)
|
|
|
1054 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1055 self.fp.write(zinfo.FileHeader())
|
|
|
1056 return
|
|
|
1057
|
|
|
1058 fp = open(filename, "rb")
|
|
|
1059 # Must overwrite CRC and sizes with correct data later
|
|
|
1060 zinfo.CRC = CRC = 0
|
|
|
1061 zinfo.compress_size = compress_size = 0
|
|
|
1062 zinfo.file_size = file_size = 0
|
|
|
1063 self.fp.write(zinfo.FileHeader())
|
|
|
1064 if zinfo.compress_type == ZIP_DEFLATED:
|
|
|
1065 cmpr = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
|
1066 zlib.DEFLATED, -15)
|
|
|
1067 elif zinfo.compress_type == ZIP_BZIP2:
|
|
|
1068 cmpr = bz2.BZ2Compressor()
|
|
|
1069 else:
|
|
|
1070 cmpr = None
|
|
|
1071 while 1:
|
|
|
1072 buf = fp.read(1024 * 8)
|
|
|
1073 if not buf:
|
|
|
1074 break
|
|
|
1075 file_size = file_size + len(buf)
|
|
|
1076 CRC = crc32(buf, CRC) & 0xffffffff
|
|
|
1077 if cmpr:
|
|
|
1078 buf = cmpr.compress(buf)
|
|
|
1079 compress_size = compress_size + len(buf)
|
|
|
1080 self.fp.write(buf)
|
|
|
1081 fp.close()
|
|
|
1082 if cmpr:
|
|
|
1083 buf = cmpr.flush()
|
|
|
1084 compress_size = compress_size + len(buf)
|
|
|
1085 self.fp.write(buf)
|
|
|
1086 zinfo.compress_size = compress_size
|
|
|
1087 else:
|
|
|
1088 zinfo.compress_size = file_size
|
|
|
1089 zinfo.CRC = CRC
|
|
|
1090 zinfo.file_size = file_size
|
|
|
1091 # Seek backwards and write CRC and file sizes
|
|
|
1092 position = self.fp.tell() # Preserve current position in file
|
|
|
1093 self.fp.seek(zinfo.header_offset + 14, 0)
|
|
|
1094 self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
|
|
|
1095 zinfo.file_size))
|
|
|
1096 self.fp.seek(position, 0)
|
|
|
1097 self.filelist.append(zinfo)
|
|
|
1098 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1099
|
|
|
1100 def writestr(self, zinfo_or_arcname, bytes):
|
|
|
1101 """Write a file into the archive. The contents is the string
|
|
|
1102 'bytes'. 'zinfo_or_arcname' is either a ZipInfo instance or
|
|
|
1103 the name of the file in the archive."""
|
|
|
1104 if not isinstance(zinfo_or_arcname, ZipInfo):
|
|
|
1105 zinfo = ZipInfo(filename=zinfo_or_arcname,
|
|
|
1106 date_time=time.localtime(time.time())[:6])
|
|
|
1107 zinfo.compress_type = self.compression
|
|
|
1108 zinfo.external_attr = 0600 << 16
|
|
|
1109 else:
|
|
|
1110 zinfo = zinfo_or_arcname
|
|
|
1111
|
|
|
1112 if not self.fp:
|
|
|
1113 raise RuntimeError(
|
|
|
1114 "Attempt to write to ZIP archive that was already closed")
|
|
|
1115
|
|
|
1116 zinfo.file_size = len(bytes) # Uncompressed size
|
|
|
1117 zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
|
1118 self._writecheck(zinfo)
|
|
|
1119 self._didModify = True
|
|
|
1120 zinfo.CRC = crc32(bytes) & 0xffffffff # CRC-32 checksum
|
|
|
1121 if zinfo.compress_type == ZIP_DEFLATED:
|
|
|
1122 co = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
|
|
|
1123 zlib.DEFLATED, -15)
|
|
|
1124 bytes = co.compress(bytes) + co.flush()
|
|
|
1125 zinfo.compress_size = len(bytes) # Compressed size
|
|
|
1126 elif zinfo.compress_type == ZIP_BZIP2:
|
|
|
1127 co = bz2.BZ2Compressor()
|
|
|
1128 bytes = co.compress(bytes) + co.flush()
|
|
|
1129 zinfo.compress_size = len(bytes) # Compressed size
|
|
|
1130 else:
|
|
|
1131 zinfo.compress_size = zinfo.file_size
|
|
|
1132 zinfo.header_offset = self.fp.tell() # Start of header bytes
|
|
|
1133 self.fp.write(zinfo.FileHeader())
|
|
|
1134 self.fp.write(bytes)
|
|
|
1135 self.fp.flush()
|
|
|
1136 if zinfo.flag_bits & 0x08:
|
|
|
1137 # Write CRC and file sizes after the file data
|
|
|
1138 self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
|
|
|
1139 zinfo.file_size))
|
|
|
1140 self.filelist.append(zinfo)
|
|
|
1141 self.NameToInfo[zinfo.filename] = zinfo
|
|
|
1142
|
|
|
1143 def __del__(self):
|
|
|
1144 """Call the "close()" method in case the user forgot."""
|
|
|
1145 self.close()
|
|
|
1146
|
|
|
1147 def close(self):
|
|
|
1148 """Close the file, and for mode "w" and "a" write the ending
|
|
|
1149 records."""
|
|
|
1150 if self.fp is None:
|
|
|
1151 return
|
|
|
1152
|
|
|
1153 if self.mode in ("w", "a") and self._didModify: # write ending records
|
|
|
1154 count = 0
|
|
|
1155 pos1 = self.fp.tell()
|
|
|
1156 for zinfo in self.filelist: # write central directory
|
|
|
1157 count = count + 1
|
|
|
1158 dt = zinfo.date_time
|
|
|
1159 dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
|
|
|
1160 dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
|
|
|
1161 extra = []
|
|
|
1162 if zinfo.file_size > ZIP64_LIMIT \
|
|
|
1163 or zinfo.compress_size > ZIP64_LIMIT:
|
|
|
1164 extra.append(zinfo.file_size)
|
|
|
1165 extra.append(zinfo.compress_size)
|
|
|
1166 file_size = 0xffffffff
|
|
|
1167 compress_size = 0xffffffff
|
|
|
1168 else:
|
|
|
1169 file_size = zinfo.file_size
|
|
|
1170 compress_size = zinfo.compress_size
|
|
|
1171
|
|
|
1172 if zinfo.header_offset > ZIP64_LIMIT:
|
|
|
1173 extra.append(zinfo.header_offset)
|
|
|
1174 header_offset = 0xffffffffL
|
|
|
1175 else:
|
|
|
1176 header_offset = zinfo.header_offset
|
|
|
1177
|
|
|
1178 extra_data = zinfo.extra
|
|
|
1179 if extra:
|
|
|
1180 # Append a ZIP64 field to the extra's
|
|
|
1181 extra_data = struct.pack(
|
|
|
1182 '<HH' + 'Q'*len(extra),
|
|
|
1183 1, 8*len(extra), *extra) + extra_data
|
|
|
1184
|
|
|
1185 extract_version = max(45, zinfo.extract_version)
|
|
|
1186 create_version = max(45, zinfo.create_version)
|
|
|
1187 else:
|
|
|
1188 extract_version = zinfo.extract_version
|
|
|
1189 create_version = zinfo.create_version
|
|
|
1190
|
|
|
1191 try:
|
|
|
1192 filename, flag_bits = zinfo._encodeFilenameFlags()
|
|
|
1193 centdir = struct.pack(structCentralDir,
|
|
|
1194 stringCentralDir, create_version,
|
|
|
1195 zinfo.create_system, extract_version, zinfo.reserved,
|
|
|
1196 flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
|
1197 zinfo.CRC, compress_size, file_size,
|
|
|
1198 len(filename), len(extra_data), len(zinfo.comment),
|
|
|
1199 0, zinfo.internal_attr, zinfo.external_attr,
|
|
|
1200 header_offset)
|
|
|
1201 except DeprecationWarning:
|
|
|
1202 print >>sys.stderr, (structCentralDir,
|
|
|
1203 stringCentralDir, create_version,
|
|
|
1204 zinfo.create_system, extract_version, zinfo.reserved,
|
|
|
1205 zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
|
|
|
1206 zinfo.CRC, compress_size, file_size,
|
|
|
1207 len(zinfo.filename), len(extra_data), len(zinfo.comment),
|
|
|
1208 0, zinfo.internal_attr, zinfo.external_attr,
|
|
|
1209 header_offset)
|
|
|
1210 raise
|
|
|
1211 self.fp.write(centdir)
|
|
|
1212 self.fp.write(filename)
|
|
|
1213 self.fp.write(extra_data)
|
|
|
1214 self.fp.write(zinfo.comment)
|
|
|
1215
|
|
|
1216 pos2 = self.fp.tell()
|
|
|
1217 # Write end-of-zip-archive record
|
|
|
1218 centDirCount = count
|
|
|
1219 centDirSize = pos2 - pos1
|
|
|
1220 centDirOffset = pos1
|
|
|
1221 if (centDirCount >= ZIP_FILECOUNT_LIMIT or
|
|
|
1222 centDirOffset > ZIP64_LIMIT or
|
|
|
1223 centDirSize > ZIP64_LIMIT):
|
|
|
1224 # Need to write the ZIP64 end-of-archive records
|
|
|
1225 zip64endrec = struct.pack(
|
|
|
1226 structEndArchive64, stringEndArchive64,
|
|
|
1227 44, 45, 45, 0, 0, centDirCount, centDirCount,
|
|
|
1228 centDirSize, centDirOffset)
|
|
|
1229 self.fp.write(zip64endrec)
|
|
|
1230
|
|
|
1231 zip64locrec = struct.pack(
|
|
|
1232 structEndArchive64Locator,
|
|
|
1233 stringEndArchive64Locator, 0, pos2, 1)
|
|
|
1234 self.fp.write(zip64locrec)
|
|
|
1235 centDirCount = min(centDirCount, 0xFFFF)
|
|
|
1236 centDirSize = min(centDirSize, 0xFFFFFFFF)
|
|
|
1237 centDirOffset = min(centDirOffset, 0xFFFFFFFF)
|
|
|
1238
|
|
|
1239 # check for valid comment length
|
|
|
1240 if len(self.comment) >= ZIP_MAX_COMMENT:
|
|
|
1241 if self.debug > 0:
|
|
|
1242 msg = 'Archive comment is too long; truncating to %d bytes' \
|
|
|
1243 % ZIP_MAX_COMMENT
|
|
|
1244 self.comment = self.comment[:ZIP_MAX_COMMENT]
|
|
|
1245
|
|
|
1246 endrec = struct.pack(structEndArchive, stringEndArchive,
|
|
|
1247 0, 0, centDirCount, centDirCount,
|
|
|
1248 centDirSize, centDirOffset, len(self.comment))
|
|
|
1249 self.fp.write(endrec)
|
|
|
1250 self.fp.write(self.comment)
|
|
|
1251 self.fp.flush()
|
|
|
1252
|
|
|
1253 if not self._filePassed:
|
|
|
1254 self.fp.close()
|
|
|
1255 self.fp = None
|
|
|
1256
|
|
|
1257
|
|
|
1258 class PyZipFile(ZipFile):
|
|
|
1259 """Class to create ZIP archives with Python library files and packages."""
|
|
|
1260
|
|
|
1261 def writepy(self, pathname, basename = ""):
|
|
|
1262 """Add all files from "pathname" to the ZIP archive.
|
|
|
1263
|
|
|
1264 If pathname is a package directory, search the directory and
|
|
|
1265 all package subdirectories recursively for all *.py and enter
|
|
|
1266 the modules into the archive. If pathname is a plain
|
|
|
1267 directory, listdir *.py and enter all modules. Else, pathname
|
|
|
1268 must be a Python *.py file and the module will be put into the
|
|
|
1269 archive. Added modules are always module.pyo or module.pyc.
|
|
|
1270 This method will compile the module.py into module.pyc if
|
|
|
1271 necessary.
|
|
|
1272 """
|
|
|
1273 dir, name = os.path.split(pathname)
|
|
|
1274 if os.path.isdir(pathname):
|
|
|
1275 initname = os.path.join(pathname, "__init__.py")
|
|
|
1276 if os.path.isfile(initname):
|
|
|
1277 # This is a package directory, add it
|
|
|
1278 if basename:
|
|
|
1279 basename = "%s/%s" % (basename, name)
|
|
|
1280 else:
|
|
|
1281 basename = name
|
|
|
1282 if self.debug:
|
|
|
1283 print "Adding package in", pathname, "as", basename
|
|
|
1284 fname, arcname = self._get_codename(initname[0:-3], basename)
|
|
|
1285 if self.debug:
|
|
|
1286 print "Adding", arcname
|
|
|
1287 self.write(fname, arcname)
|
|
|
1288 dirlist = os.listdir(pathname)
|
|
|
1289 dirlist.remove("__init__.py")
|
|
|
1290 # Add all *.py files and package subdirectories
|
|
|
1291 for filename in dirlist:
|
|
|
1292 path = os.path.join(pathname, filename)
|
|
|
1293 root, ext = os.path.splitext(filename)
|
|
|
1294 if os.path.isdir(path):
|
|
|
1295 if os.path.isfile(os.path.join(path, "__init__.py")):
|
|
|
1296 # This is a package directory, add it
|
|
|
1297 self.writepy(path, basename) # Recursive call
|
|
|
1298 elif ext == ".py":
|
|
|
1299 fname, arcname = self._get_codename(path[0:-3],
|
|
|
1300 basename)
|
|
|
1301 if self.debug:
|
|
|
1302 print "Adding", arcname
|
|
|
1303 self.write(fname, arcname)
|
|
|
1304 else:
|
|
|
1305 # This is NOT a package directory, add its files at top level
|
|
|
1306 if self.debug:
|
|
|
1307 print "Adding files from directory", pathname
|
|
|
1308 for filename in os.listdir(pathname):
|
|
|
1309 path = os.path.join(pathname, filename)
|
|
|
1310 root, ext = os.path.splitext(filename)
|
|
|
1311 if ext == ".py":
|
|
|
1312 fname, arcname = self._get_codename(path[0:-3],
|
|
|
1313 basename)
|
|
|
1314 if self.debug:
|
|
|
1315 print "Adding", arcname
|
|
|
1316 self.write(fname, arcname)
|
|
|
1317 else:
|
|
|
1318 if pathname[-3:] != ".py":
|
|
|
1319 raise RuntimeError, \
|
|
|
1320 'Files added with writepy() must end with ".py"'
|
|
|
1321 fname, arcname = self._get_codename(pathname[0:-3], basename)
|
|
|
1322 if self.debug:
|
|
|
1323 print "Adding file", arcname
|
|
|
1324 self.write(fname, arcname)
|
|
|
1325
|
|
|
1326 def _get_codename(self, pathname, basename):
|
|
|
1327 """Return (filename, archivename) for the path.
|
|
|
1328
|
|
|
1329 Given a module name path, return the correct file path and
|
|
|
1330 archive name, compiling if necessary. For example, given
|
|
|
1331 /python/lib/string, return (/python/lib/string.pyc, string).
|
|
|
1332 """
|
|
|
1333 file_py = pathname + ".py"
|
|
|
1334 file_pyc = pathname + ".pyc"
|
|
|
1335 file_pyo = pathname + ".pyo"
|
|
|
1336 if os.path.isfile(file_pyo) and \
|
|
|
1337 os.stat(file_pyo).st_mtime >= os.stat(file_py).st_mtime:
|
|
|
1338 fname = file_pyo # Use .pyo file
|
|
|
1339 elif not os.path.isfile(file_pyc) or \
|
|
|
1340 os.stat(file_pyc).st_mtime < os.stat(file_py).st_mtime:
|
|
|
1341 import py_compile
|
|
|
1342 if self.debug:
|
|
|
1343 print "Compiling", file_py
|
|
|
1344 try:
|
|
|
1345 py_compile.compile(file_py, file_pyc, None, True)
|
|
|
1346 except py_compile.PyCompileError,err:
|
|
|
1347 print err.msg
|
|
|
1348 fname = file_pyc
|
|
|
1349 else:
|
|
|
1350 fname = file_pyc
|
|
|
1351 archivename = os.path.split(fname)[1]
|
|
|
1352 if basename:
|
|
|
1353 archivename = "%s/%s" % (basename, archivename)
|
|
|
1354 return (fname, archivename)
|
|
|
1355
|
|
|
1356
|
|
|
1357 def main(args = None):
|
|
|
1358 import textwrap
|
|
|
1359 USAGE=textwrap.dedent("""\
|
|
|
1360 Usage:
|
|
|
1361 zipfile.py -l zipfile.zip # Show listing of a zipfile
|
|
|
1362 zipfile.py -t zipfile.zip # Test if a zipfile is valid
|
|
|
1363 zipfile.py -e zipfile.zip target # Extract zipfile into target dir
|
|
|
1364 zipfile.py -c zipfile.zip src ... # Create zipfile from sources
|
|
|
1365 """)
|
|
|
1366 if args is None:
|
|
|
1367 args = sys.argv[1:]
|
|
|
1368
|
|
|
1369 if not args or args[0] not in ('-l', '-c', '-e', '-t'):
|
|
|
1370 print USAGE
|
|
|
1371 sys.exit(1)
|
|
|
1372
|
|
|
1373 if args[0] == '-l':
|
|
|
1374 if len(args) != 2:
|
|
|
1375 print USAGE
|
|
|
1376 sys.exit(1)
|
|
|
1377 zf = ZipFile(args[1], 'r')
|
|
|
1378 zf.printdir()
|
|
|
1379 zf.close()
|
|
|
1380
|
|
|
1381 elif args[0] == '-t':
|
|
|
1382 if len(args) != 2:
|
|
|
1383 print USAGE
|
|
|
1384 sys.exit(1)
|
|
|
1385 zf = ZipFile(args[1], 'r')
|
|
|
1386 zf.testzip()
|
|
|
1387 print "Done testing"
|
|
|
1388
|
|
|
1389 elif args[0] == '-e':
|
|
|
1390 if len(args) != 3:
|
|
|
1391 print USAGE
|
|
|
1392 sys.exit(1)
|
|
|
1393
|
|
|
1394 zf = ZipFile(args[1], 'r')
|
|
|
1395 out = args[2]
|
|
|
1396 for path in zf.namelist():
|
|
|
1397 if path.startswith('./'):
|
|
|
1398 tgt = os.path.join(out, path[2:])
|
|
|
1399 else:
|
|
|
1400 tgt = os.path.join(out, path)
|
|
|
1401
|
|
|
1402 tgtdir = os.path.dirname(tgt)
|
|
|
1403 if not os.path.exists(tgtdir):
|
|
|
1404 os.makedirs(tgtdir)
|
|
|
1405 fp = open(tgt, 'wb')
|
|
|
1406 fp.write(zf.read(path))
|
|
|
1407 fp.close()
|
|
|
1408 zf.close()
|
|
|
1409
|
|
|
1410 elif args[0] == '-c':
|
|
|
1411 if len(args) < 3:
|
|
|
1412 print USAGE
|
|
|
1413 sys.exit(1)
|
|
|
1414
|
|
|
1415 def addToZip(zf, path, zippath):
|
|
|
1416 if os.path.isfile(path):
|
|
|
1417 zf.write(path, zippath, ZIP_DEFLATED)
|
|
|
1418 elif os.path.isdir(path):
|
|
|
1419 for nm in os.listdir(path):
|
|
|
1420 addToZip(zf,
|
|
|
1421 os.path.join(path, nm), os.path.join(zippath, nm))
|
|
|
1422 # else: ignore
|
|
|
1423
|
|
|
1424 zf = ZipFile(args[1], 'w', allowZip64=True)
|
|
|
1425 for src in args[2:]:
|
|
|
1426 addToZip(zf, src, os.path.basename(src))
|
|
|
1427
|
|
|
1428 zf.close()
|
|
|
1429
|
|
|
1430 if __name__ == "__main__":
|
|
|
1431 main()
|
