[Twisted-Python] Question: Resuming a failed TCP transfer

Itamar Shtull-Trauring itamar at itamarst.org
Sun May 18 21:12:19 EDT 2008

On Sun, 2008-05-18 at 18:47 -0400, Nadav Aharony wrote:

> I'm wondering, is there some built-in Twisted functionality (or any 
> other existing implementation using Twisted) for doing 
> resumable/disruption tolerant file transfer?
> Sample scenario: A sends file to B, session fails for whatever reason. B 
> saved whatever data was received in some temporary structure, and knows 
> to resume transfer from where it left off or alternatively request 
> specific chunks that it is missing.
> Wanted to know this before I start implementing such functionality on my 
> own.

Yes, that's what the client factory is for - to store data that needs to
last beyond the life of a single connection. For example see
infrastructure used by twisted.web.client.downloadPage for resumable

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