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annotate 2.00/zipfile313.diff @ 30:f17f19d9eb0a

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hasattr -> try in the newly added 2.6 zipfile
author Oleg Oshmyan <chortos@inbox.lv>
date Wed, 24 Nov 2010 23:42:06 +0000
parents a8cc383b787c
children 3000bb94addb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
29
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1 --- ../../zipfile.py 2010-11-24 01:54:28.000000000 +0000
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2 +++ zipfile313.py 2010-11-24 01:55:17.000000000 +0000
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3 @@ -3,6 +3,7 @@
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4
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5 XXX references to utf-8 need further investigation.
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6 """
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7 +# Improved by Chortos-2 in 2010 (added bzip2 support)
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8 import struct, os, time, sys, shutil
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9 import binascii, io, stat
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10
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11 @@ -13,8 +14,13 @@
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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 + "ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile", "ZIP_BZIP2" ]
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23
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24 class BadZipfile(Exception):
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25 pass
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26 @@ -35,6 +41,7 @@
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27 # constants for Zip file compression methods
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28 ZIP_STORED = 0
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29 ZIP_DEFLATED = 8
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30 +ZIP_BZIP2 = 12
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31 # Other ZIP compression methods not supported
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32
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33 # Below are some formats and associated data for reading/writing headers using
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34 @@ -471,6 +478,9 @@
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35 self.compreadsize = 64*1024
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36 if self.compress_type == ZIP_DEFLATED:
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37 self.dc = zlib.decompressobj(-15)
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38 + elif self.compress_type == ZIP_BZIP2:
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39 + self.dc = bz2.BZ2Decompressor()
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40 + self.compreadsize = 900000
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41
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42 if hasattr(zipinfo, 'CRC'):
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43 self._expected_crc = zipinfo.CRC
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44 @@ -598,7 +608,7 @@
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45 if self.compress_type == ZIP_STORED:
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46 lr = len(self.readbuffer)
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47 bytesToRead = min(bytesToRead, size - lr)
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48 - elif self.compress_type == ZIP_DEFLATED:
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49 + else:
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50 if len(self.readbuffer) > size:
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51 # the user has requested fewer bytes than we've already
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52 # pulled through the decompressor; don't read any more
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53 @@ -633,14 +643,17 @@
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54 newdata = bytes(map(self.decrypter, newdata))
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55
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56 # decompress newly read data if necessary
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57 - if newdata and self.compress_type == ZIP_DEFLATED:
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58 + if newdata and self.compress_type != ZIP_STORED:
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59 newdata = self.dc.decompress(newdata)
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60 - self.rawbuffer = self.dc.unconsumed_tail
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61 + self.rawbuffer = self.dc.unconsumed_tail if self.compress_type == ZIP_DEFLATED else ''
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62 if self.eof and len(self.rawbuffer) == 0:
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63 # we're out of raw bytes (both from the file and
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64 # the local buffer); flush just to make sure the
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65 # decompressor is done
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66 - newdata += self.dc.flush()
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67 + try:
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68 + newdata += self.dc.flush()
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69 + except AttributeError:
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70 + pass
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71 # prevent decompressor from being used again
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72 self.dc = None
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73
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74 @@ -668,7 +681,8 @@
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75 file: Either the path to the file, or a file-like object.
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76 If it is a path, the file will be opened and closed by ZipFile.
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77 mode: The mode can be either read "r", write "w" or append "a".
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78 - compression: ZIP_STORED (no compression) or ZIP_DEFLATED (requires zlib).
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79 + compression: ZIP_STORED (no compression), ZIP_DEFLATED (requires zlib),
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80 + or ZIP_BZIP2 (requires bz2).
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81 allowZip64: if True ZipFile will create files with ZIP64 extensions when
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82 needed, otherwise it will raise an exception when this would
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83 be necessary.
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84 @@ -688,6 +702,10 @@
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85 if not zlib:
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86 raise RuntimeError(
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87 "Compression requires the (missing) zlib module")
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88 + elif compression == ZIP_BZIP2:
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89 + if not bz2:
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90 + raise RuntimeError(
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91 + "Compression requires the (missing) bz2 module")
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92 else:
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93 raise RuntimeError("That compression method is not supported")
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94
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95 @@ -1024,7 +1042,10 @@
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96 if zinfo.compress_type == ZIP_DEFLATED and not zlib:
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97 raise RuntimeError(
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98 "Compression requires the (missing) zlib module")
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99 - if zinfo.compress_type not in (ZIP_STORED, ZIP_DEFLATED):
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100 + if zinfo.compress_type == ZIP_BZIP2 and not bz2:
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101 + raise RuntimeError(
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102 + "Compression requires the (missing) bz2 module")
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103 + if zinfo.compress_type not in (ZIP_STORED, ZIP_DEFLATED, ZIP_BZIP2):
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104 raise RuntimeError("That compression method is not supported")
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105 if zinfo.file_size > ZIP64_LIMIT:
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106 if not self._allowZip64:
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107 @@ -1085,6 +1106,8 @@
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108 if zinfo.compress_type == ZIP_DEFLATED:
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109 cmpr = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
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110 zlib.DEFLATED, -15)
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111 + elif zinfo.compress_type == ZIP_BZIP2:
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112 + cmpr = bz2.BZ2Compressor()
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113 else:
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114 cmpr = None
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115 while 1:
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116 @@ -1145,6 +1168,10 @@
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117 zlib.DEFLATED, -15)
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118 data = co.compress(data) + co.flush()
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119 zinfo.compress_size = len(data) # Compressed size
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120 + elif zinfo.compress_type == ZIP_BZIP2:
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121 + co = bz2.BZ2Compressor()
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122 + data = co.compress(data) + co.flush()
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123 + zinfo.compress_size = len(data) # Compressed size
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124 else:
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125 zinfo.compress_size = zinfo.file_size
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126 zinfo.header_offset = self.fp.tell() # Start of header data