Could zipfile module process the zip data in memory?
sjmachin at lexicon.net
Sun Apr 29 14:34:08 CEST 2007
On Apr 29, 10:14 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:
> > > > I made a C/S network program, the client receive the zip file from the
> > > > server, and read the data into a variable. how could I process the
> > > > zipfile directly without saving it into file.
> > > > In the document of the zipfile module, I note that it mentions the
> > > > file-like object? what does it mean?
> > > > class ZipFile( file[, mode[, compression[, allowZip64]]])
> > > > Open a ZIP file, where file can be either a path to a file (a
> > > > string) or a file-like object.
> > > Yes it is possible to process the content of the zipfile without
> > > saving every file:
> > > [untested]
> > > from zipfile import ZipFile
> > > from StringIO import StringIO
> > > zipp = ZipFile( this_is_the_zip_file_from_your_server, 'r' )
> > > for name in zipp.namelist( ):
> > > content = zipp.read( name )
> > > s = StringIO( )
> > > s.write( content )
> > > # now the file 'name' is in 's' (in memory)
> > > # you can process it further
> > > # ............
> > > s.close( )
> > > zipp.close( )
> > > HTH,
> > > Daniel
> > Thanks!
> > Maybe my poor english makes you confusion:-). The client receive the
> > zip file data from the server, and keep these data as a variable, not
> > as a file in harddisk. such as "zipFileData", but the first argument
> > of the "ZipFile" is filename. I would like to let the ZipFile() open
> > the file from "zipFileData" directly but not file in harddisk
> > zipp = ZipFile( this_is_the_zip_file_from_your_server, 'r' )
> > ^ I don't have this file, all its data
> > is in a variable.
> Well, as you correctly pointed out in your original post ZipFile can
> receive a filename or a file-like object. If the zip archive data is
> in zipFileData then you might do:
> from StringIO import StringIO
> from zipfile import ZipFile
> data = StringIO( )
> data.write( zipFileData )
> data.close( )
Even if that worked, it would be a long-winded way to do it. Please
contemplate the docs:
Retrieve the entire contents of the ``file'' at any time before the
StringIO object's close() method is called.[snip note re mixing str &
Free the memory buffer. """
The short working way is: """class StringIO( [buffer])
When a StringIO object is created, it can be initialized to an
existing string by passing the string to the constructor."""
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