instead of using is_tarfile() you could use the TarFile class (which
can take a file object) to check whether the data can be interpreted
as a tar file:
from tarfile import TarFile, TarError
from StringIO import StringIO
try:
TarFile(fileobj=StringIO(data))
except TarError:
print "Not a tar file"
On Nov 24, 3:47 pm, Thadeus Burgess <[email protected]> wrote:
> Ah yes would love to, however it ends up copy the file twice, since it will
> do it in my function, and then again later on in SQLFORM.accepts.
>
> This is the modified version, it works, I just need to make sure the file is
> not too large for the server to handle.
>
> The limitation really comes from tarfile.is_tarfile, it expects and requires
> a filename, because it wants to open the file itself. Therefore I need a
> copy of the file somewhere besides in memory.
>
> Any ideas on improvements or a better way?
>
> def is_valid_tar(form):
> import tarfile, os, random, shutil
> tmppath = os.path.join(request.folder, 'uploads', 'tmpupf%f.temp.w2p' %
> random.random())
> f = form.vars.file.file
> try:
> dest_file = open(tmppath, 'wb')
> shutil.copyfileobj(f, dest_file)
> except:
> pass
> finally:
> dest_file.close()
>
> if not tarfile.is_tarfile(tmppath):
> form.errors.file = "Invalid file format"
>
> try:
> os.remove(tmppath)
> except:
> pass
>
> #...
> form.accepts(...onvalidation=is_valid_tar)
>
> -Thadeus
>
> On Mon, Nov 23, 2009 at 10:31 PM, Richard <[email protected]> wrote:
>
> > IIRC, you can use db.table.field.store(request.vars.field) to get the
> > web2py generated filename.
>
> > On Nov 24, 2:53 pm, Thadeus Burgess <[email protected]> wrote:
> > > The problem is I am trying to get the file from the function in
> > > SQLFORM.onvalidation... and this happens before the file gets renamed or
> > > saved to the disk. The only way i see of accomplishing this is
>
> > > if form.accepts(request.vars, session, dbio=False):
>
> > > #def is_plugin_archive(form)
> > > #import tarfile, os
> > > #path = os.path.join(db._folder, '..', 'uploads',
> > > form.vars.file_newfilename)
>
> > > #if not tarfile.is_tarfile(path):
> > > #form.errors.file = "Not a valid tar archive"
>
> > > is_plugin_archive(form)
>
> > > if not form.errors:
> > > session.flash = "Version uploaded."
> > > redirect(URL(r=request, f='plug', args=plugin.id))
> > > else:
> > > response.flash = "There were errors with the file"
>
> > > elif form.errors:
> > > response.flash = "There were errors"
>
> > > -Thadeus
>
> > > On Mon, Nov 23, 2009 at 9:46 PM, mr.freeze <[email protected]> wrote:
> > > > ieve it is form.vars.<upload_field>_newfilename. You should be
> > > > able to get the path
>
>
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