Serving PDF

[Massimiliano Pietroni]

Hi,

I'm developing an app and I have a little problem. I'm storing a PDF in the datastore and then serving it. When I'm serving the file, the one I get is corrupt. By I can't understand why.

I'm storing it like that:

class LogSenderHandler(InboundMailHandler):
 def receive(self, mail_message):
    for elemento in mail_message.attachments:
        fax = FAX()
        fax.immagine = db.Blob(str(elemento[1]))
        fax.put()

And I'm serving it like that

class GetImage(webapp.RequestHandler):
 def get(self):
    immagine = db.Query(FAX).fetch(limit=1)
    for elemento in immagine:
      self.response.headers['Content-Type'] = 'application/pdf'
      self.response.headers['Content-Disposition'] = 'attachment; filename=fax.pdf'
      self.response.out.write(elemento.immagine)
      logging.error(elemento.immagine)

It think everything is okay.

[Greg]

On Apr 23, 1:23 am, Massimiliano Pietroni

<massimili...@iviaggidellemeraviglie.com> wrote:
> I'm developing an app and I have a little problem. I'm storing a PDF in the
> datastore and then serving it. When I'm serving the file, the one I get is
> corrupt. By I can't understand why.

I would look very closely at what exactly "corrupt" is. PDFs are very
sensitive to even a single byte being added or removed, so I'd look at
the difference between the original file and the download on a byte
level.

On linux you can use the xxd command, in Windows find a hex dump
utility.