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py3: More unicode porting

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Fix some byte handling in zipfile and also avoid using chdir in it
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Kovid Goyal 2019-05-30 18:02:18 +05:30
parent 02f6c2f47b
commit 7931cf637a
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GPG Key ID: 06BC317B515ACE7C
2 changed files with 2494 additions and 2497 deletions
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4925
src/calibre/utils/bibtex.py
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66
src/calibre/utils/zipfile.py
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@ -1,8 +1,8 @@
from __future__ import absolute_import, division, print_function, unicode_literals
""" """
Read and write ZIP files. Modified by Kovid Goyal to support replacing files in Read and write ZIP files. Modified by Kovid Goyal to support replacing files in
a zip archive, detecting filename encoding, updating zip files, etc. a zip archive, detecting filename encoding, updating zip files, etc.
""" """
from __future__ import print_function
import struct, os, time, sys, shutil, stat, re, io import struct, os, time, sys, shutil, stat, re, io
import binascii import binascii
from contextlib import closing from contextlib import closing
@ -146,12 +146,12 @@ def decode_arcname(name):
if not isinstance(name, unicode_type): if not isinstance(name, unicode_type):
try: try:
name = name.decode('utf-8') name = name.decode('utf-8')
except: except Exception:
res = detect(name) res = detect(name)
encoding = res['encoding'] encoding = res['encoding']
try: try:
name = name.decode(encoding) name = name.decode(encoding)
except: except Exception:
name = name.decode('utf-8', 'replace') name = name.decode('utf-8', 'replace')
return name return name
@ -248,13 +248,13 @@ def _EndRecData(fpin):
except IOError: except IOError:
return None return None
data = fpin.read() data = fpin.read()
if data[0:4] == stringEndArchive and data[-2:] == "\000\000": if data[0:4] == stringEndArchive and data[-2:] == b"\000\000":
# the signature is correct and there's no comment, unpack structure # the signature is correct and there's no comment, unpack structure
endrec = struct.unpack(structEndArchive, data) endrec = struct.unpack(structEndArchive, data)
endrec=list(endrec) endrec=list(endrec)
# Append a blank comment and record start offset # Append a blank comment and record start offset
endrec.append("") endrec.append(b"")
endrec.append(filesize - sizeEndCentDir) endrec.append(filesize - sizeEndCentDir)
# Try to read the "Zip64 end of central directory" structure # Try to read the "Zip64 end of central directory" structure
@ -316,12 +316,12 @@ class ZipInfo (object):
'file_offset', 'file_offset',
) )
def __init__(self, filename=u"NoName", date_time=(1980,1,1,0,0,0)): def __init__(self, filename="NoName", date_time=(1980,1,1,0,0,0)):
self.orig_filename = filename # Original file name in archive self.orig_filename = filename # Original file name in archive
# Terminate the file name at the first null byte. Null bytes in file # Terminate the file name at the first null byte. Null bytes in file
# names are used as tricks by viruses in archives. # names are used as tricks by viruses in archives.
null_byte = filename.find(b'\0' if isinstance(filename, bytes) else u'\0') null_byte = filename.find(b'\0' if isinstance(filename, bytes) else '\0')
if null_byte >= 0: if null_byte >= 0:
filename = filename[0:null_byte] filename = filename[0:null_byte]
# This is used to ensure paths in generated ZIP files always use # This is used to ensure paths in generated ZIP files always use
@ -474,7 +474,7 @@ class _ZipDecrypter:
def _crc32(self, ch, crc): def _crc32(self, ch, crc):
"""Compute the CRC32 primitive on one byte.""" """Compute the CRC32 primitive on one byte."""
return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ord(ch)) & 0xff] return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ch) & 0xff]
def __init__(self, pwd): def __init__(self, pwd):
self.key0 = 305419896 self.key0 = 305419896
@ -490,11 +490,9 @@ class _ZipDecrypter:
self.key2 = self._crc32(chr((self.key1 >> 24) & 255), self.key2) self.key2 = self._crc32(chr((self.key1 >> 24) & 255), self.key2)
def __call__(self, c): def __call__(self, c):
"""Decrypt a single character.""" """Decrypt a single byte."""
c = ord(c)
k = self.key2 | 2 k = self.key2 | 2
c = c ^ (((k * (k^1)) >> 8) & 255) c = c ^ (((k * (k^1)) >> 8) & 255)
c = chr(c)
self._UpdateKeys(c) self._UpdateKeys(c)
return c return c
@ -512,7 +510,7 @@ class ZipExtFile(io.BufferedIOBase):
MIN_READ_SIZE = 4096 MIN_READ_SIZE = 4096
# Search for universal newlines or line chunks. # Search for universal newlines or line chunks.
PATTERN = re.compile(r'^(?P<chunk>[^\r\n]+)|(?P<newline>\n|\r\n?)') PATTERN = re.compile(br'^(?P<chunk>[^\r\n]+)|(?P<newline>\n|\r\n?)')
def __init__(self, fileobj, mode, zipinfo, decrypter=None): def __init__(self, fileobj, mode, zipinfo, decrypter=None):
self._fileobj = fileobj self._fileobj = fileobj
@ -564,10 +562,10 @@ class ZipExtFile(io.BufferedIOBase):
if not self._universal: if not self._universal:
return io.BufferedIOBase.readline(self, limit) return io.BufferedIOBase.readline(self, limit)
line = '' line = b''
while limit < 0 or len(line) < limit: while limit < 0 or len(line) < limit:
readahead = self.peek(2) readahead = self.peek(2)
if readahead == '': if not readahead:
return line return line
# #
@ -586,7 +584,7 @@ class ZipExtFile(io.BufferedIOBase):
if newline not in self.newlines: if newline not in self.newlines:
self.newlines.append(newline) self.newlines.append(newline)
self._offset += len(newline) self._offset += len(newline)
return line + '\n' return line + b'\n'
chunk = match.group('chunk') chunk = match.group('chunk')
if limit >= 0: if limit >= 0:
@ -657,7 +655,7 @@ class ZipExtFile(io.BufferedIOBase):
self._compress_left -= len(data) self._compress_left -= len(data)
if data and self._decrypter is not None: if data and self._decrypter is not None:
data = ''.join(map(self._decrypter, data)) data = b''.join(bytes(bytearray(map(self._decrypter, bytearray(data)))))
if self._compress_type == ZIP_STORED: if self._compress_type == ZIP_STORED:
self._update_crc(data, eof=(self._compress_left==0)) self._update_crc(data, eof=(self._compress_left==0))
@ -904,11 +902,11 @@ class ZipFile:
self.delete(deleteName) self.delete(deleteName)
self.write(filename, arcname, compress_type) self.write(filename, arcname, compress_type)
def replacestr(self, zinfo, bytes): def replacestr(self, zinfo, byts):
"""Delete zinfo.filename, and write a new file into the archive. The """Delete zinfo.filename, and write a new file into the archive. The
contents is the string 'bytes'.""" contents is the string 'bytes'."""
self.delete(zinfo.filename) self.delete(zinfo.filename)
self.writestr(zinfo, bytes) self.writestr(zinfo, byts)
def delete(self, name): def delete(self, name):
"""Delete the file from the archive. If it appears multiple """Delete the file from the archive. If it appears multiple
@ -1060,15 +1058,15 @@ class ZipFile:
# completely random, while the 12th contains the MSB of the CRC, # completely random, while the 12th contains the MSB of the CRC,
# or the MSB of the file time depending on the header type # or the MSB of the file time depending on the header type
# and is used to check the correctness of the password. # and is used to check the correctness of the password.
bytes = zef_file.read(12) byts = zef_file.read(12)
h = list(map(zd, bytes[0:12])) h = list(map(zd, bytearray(byts[0:12])))
if zinfo.flag_bits & 0x8: if zinfo.flag_bits & 0x8:
# compare against the file type from extended local headers # compare against the file type from extended local headers
check_byte = (zinfo._raw_time >> 8) & 0xff check_byte = (zinfo._raw_time >> 8) & 0xff
else: else:
# compare against the CRC otherwise # compare against the CRC otherwise
check_byte = (zinfo.CRC >> 24) & 0xff check_byte = (zinfo.CRC >> 24) & 0xff
if ord(h[11]) != check_byte: if h[11] != check_byte:
raise RuntimeError("Bad password for file", name) raise RuntimeError("Bad password for file", name)
return ZipExtFile(zef_file, mode, zinfo, zd) return ZipExtFile(zef_file, mode, zinfo, zd)
@ -1334,20 +1332,16 @@ class ZipFile:
''' '''
if prefix: if prefix:
self.writestr(prefix+'/', b'', 0o755) self.writestr(prefix+'/', b'', 0o755)
cwd = os.path.abspath(getcwd()) fp = (prefix + ('/' if prefix else '')).replace('//', '/')
try: for f in os.listdir(path):
os.chdir(path) if simple_filter(f): # Added by Kovid
fp = (prefix + ('/' if prefix else '')).replace('//', '/') continue
for f in os.listdir('.'): arcname = fp + f
if simple_filter(f): # Added by Kovid f = os.path.join(path, f)
continue if os.path.isdir(f):
arcname = fp + f self.add_dir(f, prefix=arcname, simple_filter=simple_filter)
if os.path.isdir(f): else:
self.add_dir(f, prefix=arcname, simple_filter=simple_filter) self.write(f, arcname)
else:
self.write(f, arcname)
finally:
os.chdir(cwd)
def __del__(self): def __del__(self):
"""Call the "close()" method in case the user forgot.""" """Call the "close()" method in case the user forgot."""
@ -1487,7 +1481,7 @@ def safe_replace(zipstream, name, datastream, extra_replacements={},
replacements = {name:datastream} replacements = {name:datastream}
replacements.update(extra_replacements) replacements.update(extra_replacements)
names = frozenset(replacements.keys()) names = frozenset(replacements.keys())
found = set([]) found = set()
def rbytes(name): def rbytes(name):
r = replacements[name] r = replacements[name]