The sftp code was removed with paramiko, what we can do to restore the functionality is to define a new message type for file transfers and send the file through the normal client-server channel.

• new accept_files option for servers (defaults to off?)
• keep file pointer + index in server connection
• send first chunk of data, below the max_line limit and also taking into account the link speed
• server creates a temporary file in configurable download location (default to ~/Download)
• server sends an ack after each packet is received (potential small delay here to ensure we prioritize other packets ahead of file transfers)
• client fire progress_update callbacks registered with the file transfer
• client sends the next chunk (potential delay here - same reason as above), taking into account how long the first previous took (so we can keep UI updates regular - say 1 second target)
• if the server (or client) does not ack (or send the next chunk) within a certain amount of time (tbd - dynamic?), we cancel the whole thing and tell the other end. The server can delete the temporary file.
• When the transfer is complete, we ask the server to open it.
• Ensure file data is encrypted over the wire

in a recent package for ubuntu 12.10

[ee] 2012/10/12 11:21:14.363124 Traceback (most recent call last):
[ee] 2012/10/12 11:21:14.363149   File "/usr/lib/python2.7/dist-packages/winswitch/server/controller.py", line 316, in ready
[ee] 2012/10/12 11:21:14.363166     self.assign_virt_utils()
[ee] 2012/10/12 11:21:14.363181   File "/usr/lib/python2.7/dist-packages/winswitch/server/controller.py", line 405, in assign_virt_utils
[ee] 2012/10/12 11:21:14.363209     from winswitch.virt.vnc_server_util import VNCServerUtil
[ee] 2012/10/12 11:21:14.363225   File "/usr/lib/python2.7/dist-packages/winswitch/virt/vnc_server_util.py", line 16, in <module>
[ee] 2012/10/12 11:21:14.363240     from winswitch.virt.server_util_base import ServerUtilBase
[ee] 2012/10/12 11:21:14.363255   File "/usr/lib/python2.7/dist-packages/winswitch/virt/server_util_base.py", line 40, in <module>
[ee] 2012/10/12 11:21:14.363270     from winswitch.util.xkbmap_util import set_keymap
[ee] 2012/10/12 11:21:14.363286   File "/usr/lib/python2.7/dist-packages/winswitch/util/xkbmap_util.py", line 173
[ee] 2012/10/12 11:21:14.363312 SyntaxError: Non-ASCII character '\xc3' in file /usr/lib/python2.7/dist-packages/winswitch/util/xkbmap_util.py on line 173, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details

name="str"