FTP

Nicodemus nicodemus at globalite.com.br
Wed Apr 16 04:36:30 CEST 2003


Matt Singer wrote:

>I have an application with a PYQT interface that uploads large files. 
>Is there an async method to get how much data has been sent with
>storlines to update a progress bar?  Or is there an alternate ftp
>interface?
>

 From the Python docs:

storlines(command, file)
    Store a file in ASCII transfer mode. command should be an 
appropriate "STOR" command (see storbinary()). Lines are read until EOF 
from the open file object file using its readline() method to provide 
the data to be stored.

So you can send any object with a readline method that support the same 
semantics of a file (untested code):


class ProgressFileReader:
    
     def __init__(self, filename, callback):
         self.file = file(filename, 'r')
         self.file_size = os.path.getsize(filename)
         self.callback = callback # will be called with one parameter:
                                  # the percentage of the file read so far

     def readline(self, *args):
         result = self.file.readline(*args)
         percent = self.file.tell()*100/self.file_size
         self.callback(percent)
         return result

And use it as follows:

    f = ProgressFileReader('myfile', mycallback)
    ftpobj.storlines('STOR myfile', f)
     
 
Another option would be to subclass the file object.

Hope that helps,
Nicodemus.







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