[Duplicity-tracker] [bug #22494] webdav backend uses keep-alive, but does not handle it

[Peter Schuller]

URL:
  <http://savannah.nongnu.org/bugs/?22494>

                 Summary: webdav backend uses keep-alive, but does not handle
it
                 Project: duplicity
            Submitted by: scode
            Submitted on: Wednesday 03/05/2008 at 19:09
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The webdav backend uses a single persistent HTTP connection, by way of
keepalive. However, when using keepalive the client must be prepared to
re-submit requests as the server can close the connection at any time.

This causes backups to fail when the server-side keepalive timeout is
reached, while downloading signatures and such.

I will fix this myself, but I first want to get a couple of other patches
submitted (the webdav url fixing + the asynchronous upload bits, the latter of
which will introduce some utilities I want). Filing as a bug in the meantime.

The two possible suggested fixes:

* Re-establish a connection each time.
* Actually support re-submission; but this is not recommended from my end
since it is somewhat difficult to detect the failure mode (and we do not want
to cause double-submissions of entire volumes; though I have not yet
investigated if this affects uploads).





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