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

[Nadav Aharony]

Itamar Shtull-Trauring wrote:
> 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
> downloads.
>
>   
This is exactly what I was looking for, thanks!
Can I safely assume that the part that was initially received is all 
contiguous and correct? (if so this would be because of the TCP CRC 
check for each packet, right?)

-Nadav
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://twistedmatrix.com/pipermail/twisted-python/attachments/20080519/ed8aa26d/attachment.htm