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Read and write ZIP files.
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r8 | j jd| jdB fS X d S )Nasciizutf-8i )r? encoderf UnicodeEncodeError)r| r r r r s z ZipInfo._encodeFilenameFlagsc C s( | j }tj}xt|dkr"|d|d d \}}|dkr|dkrZ|d|dd }nV|dkrv|d|dd }n:|d
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}| jdkr|| | _|d7 }| jdkr|| | _|d7 }| jdkr| j}|| | _|d7 }||d d }qW d S )Nr z |_|rd|_| jdO _n|j|_|S )a_ Construct an appropriate ZipInfo for a file on the filesystem.
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_ZipDecryptera Class to handle decryption of files stored within a ZIP archive.
ZIP supports a password-based form of encryption. Even though known
plaintext attacks have been found against it, it is still useful
to be able to get data out of such a file.
Usage:
zd = _ZipDecrypter(mypwd)
plain_char = zd(cypher_char)
plain_text = map(zd, cypher_text)
c C sh d} dgd }xTt dD ]H}|}x6t dD ]*}|d@ rH|d? d@ | A }q*|d? d@ }q*W |||< qW |S )zGenerate a CRC-32 table.
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relying on binascii.crc32().
l q[ r r r i)range)Zpolytabler4 crcr5 r r r _GenerateCRCTable% s
z _ZipDecrypter._GenerateCRCTableNc C s |d? d@ | j ||A d@ A S )z(Compute the CRC32 primitive on one byte.r i )crctable)r| Zchr r r r _crc329 s z_ZipDecrypter._crc32c C sB t jd krt j t _d| _d| _d| _x|D ]}| j| q,W d S )NixV4igE#ixV4)r r r key0key1key2 _UpdateKeys)r| pwdpr r r r} = s
z_ZipDecrypter.__init__c C sX | j || j| _| j| jd@ d@ | _| jd d d@ | _| j | jd? d@ | j| _d S )Nr l ir r )r r r r )r| cr r r r F s z_ZipDecrypter._UpdateKeysc C s0 | j dB }|||dA d? d@ A }| j| |S )zDecrypt a single character.r r r r )r r )r| r kr r r __call__L s
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r r r r r r r r} r r r r r r r s r c @ s, e Zd Zdd Zdd Zdd Zdd Zd S )
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s& z| j r| jj W d t j X d S )N)r r r super)r| )r r r r s zZipExtFile.closec C s | j S )N)r )r| r r r r s zZipExtFile.seekabler c C s, | j stjd| j }|dkr&|}n.|dkr8|| }n |dkrL| j| }ntd|| jkrd| j}|dk rpd}|| }|| j }|dkr|t| jk r|| _d}nR|dk r| j j
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z = ZipFile(file, mode="r", compression=ZIP_STORED, allowZip64=True)
file: Either the path to the file, or a file-like object.
If it is a path, the file will be opened and closed by ZipFile.
mode: The mode can be either read 'r', write 'w', exclusive create 'x',
or append 'a'.
compression: ZIP_STORED (no compression), ZIP_DEFLATED (requires zlib),
ZIP_BZIP2 (requires bz2) or ZIP_LZMA (requires lzma).
allowZip64: if True ZipFile will create files with ZIP64 extensions when
needed, otherwise it will raise an exception when this would
be necessary.
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r | jj"dd d| _| jj | _ Y nX nt dW n$ | j}d| _| j$| Y nX dS )z]Open the ZIP file with mode read 'r', write 'w', exclusive create 'x',
or append 'a'.rB wxaz+ZipFile requires mode 'r', 'w', 'x', or 'a'Fr Nr+ r< zw+bzx+bzr+bwbZxb)rB rC rD rE zr+bzw+bzx+br r Tr z"Mode must be 'r', 'w', 'x', or 'a')rB rC rD rE )rC rD )%rx r _allowZip64
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zZipFile.__init__c C s | S )Nr )r| r r r __enter__ s zZipFile.__enter__c C s | j d S )N)r )r| typevalue tracebackr r r __exit__ s zZipFile.__exit__c C s d| j j| j jf g}| jd k rd| jr8|jd| j n| jd k rR|jd| j |jd| j n
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_CD_EXTRA_FIELD_LENGTHr1 _CD_COMMENT_LENGTHr_ _CD_LOCAL_HEADER_OFFSETrj rT rc rd re rf rb rk rl rm MAX_EXTRACT_VERSIONr rg rh ri rn ra r r? r/ r@ r? sortedro )r| r9 rR Zsize_cdZ offset_cdconcatZinferredrS rZ centdirr? flagsrD tdZ
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|d x:| jD ]0}d|jdd }t d |j||jf |d qW dS ) z+Print a table of contents for the zip file.z%-46s %19s %12s File Name Modified Size)r z%d-%02d-%02d %02d:%02d:%02dNr" z
%-46s %s %12d)rv rw rx )r^ r? ra r? rm )r| r r Zdater r r printdirW s zZipFile.printdirc C s^ d}xT| j D ]J}y.| j|jd}x|j|r0q$W W dQ R X W q tk
rT |jS X q W dS )z%Read all the files and check the CRC.r r rB Ni )r? r> r? r; r )r| Z
chunk_sizer fr r r testzip` s zZipFile.testzipc C s$ | j j|}|dkr td| |S )z,Return the instance of ZipInfo given 'name'.Nz(There is no item named %r in the archive)r@ r KeyError)r| r infor r r getinfom s
zZipFile.getinfoc C s8 |r"t |t r"tdt|j |r.|| _nd| _dS )z)Set default password for encrypted files.zpwd: expected bytes, got %sN)r r+ TypeErrorrU r r )r| r r r r setpasswordv s
zZipFile.setpasswordc C s | j S )z.The comment text associated with the ZIP file.)rJ )r| r r r r_ s zZipFile.commentc C s^ t |ts tdt|j t|tkrNdd l}|jdt dd |d t }|| _ d| _
d S )Nz comment: expected bytes, got %sr z3Archive comment is too long; truncating to %d bytesr )
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}|j S Q R X dS )zReturn file bytes for name.rB N)r> r; )r| r r r9 r r r r; s z ZipFile.readF) force_zip64c s |d"krt d|r2t|t r2tdt|j |rF|dkrFt d jsTt dt|trd|}n$|dkr~t|} j|_ n
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d |krt%d | t+|||| d!S |j, Y nX dS )#au Return file-like object for 'name'.
name is a string for the file name within the ZIP file, or a ZipInfo
object.
mode should be 'r' to read a file already in the ZIP file, or 'w' to
write to a file newly added to the archive.
pwd is the password to decrypt files (only used for reading).
When writing, if the file size is not known in advance but may exceed
2 GiB, pass force_zip64 to use the ZIP64 format, which can handle large
files. If the size is known in advance, it is best to pass a ZipInfo
instance for name, with zinfo.file_size set.
rB rC z open() requires mode "r" or "w"zpwd: expected bytes, got %sz'pwd is only supported for reading filesz2Attempt to use ZIP archive that was already closed)r zyCan't read from the ZIP file while there is an open writing handle on it. Close the writing handle before trying to read.r c s j S )N)r r )r| r r r[ s z ZipFile.open..zTruncated file headerz Bad magic number for file header z$compressed patched data (flag bit 5)@ z strong encryption (flag bit 6)i zutf-8rY z/File name in directory %r and header %r differ.NzOverlapped entries: z (possible zip bomb)z6File %r is encrypted, password required for extractionr r r r r r& zBad password for file %rT> rB rC )-rx r r+ r rU r r9 r
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z ZipFile.openc C s |r| j rtd| jr"tdt|ds2d|_d|_d|_d|_|jt kr\| jdO _| j
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zZipFile._open_to_writec C s* |dkrt j }n
t j|}| j|||S )a# Extract a member from the archive to the current working directory,
using its full name. Its file information is extracted as accurately
as possible. `member' may be a filename or a ZipInfo object. You can
specify a different directory using `path'.
N)ru getcwdr _extract_member)r| memberr r r r r extract6 s
zZipFile.extractc C sL |dkr| j }|dkr"tj }n
tj|}x|D ]}| j||| q2W dS )zExtract all members from the archive to the current working
directory. `path' specifies a different directory to extract to.
`members' is optional and must be a subset of the list returned
by namelist().
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