Re: NSFileHandle and Data Integrity

[Jens Alfke]

On Jun 10, 2011, at 2:16 PM, Tony S. Wu wrote:

> I have a simple client-server application. I use NSFileHandle to handle the 
> communication between client and server. However, NSFileHandle doesn't seem 
> to have any sort of guarantee on data integrity because when I try to send 
> large amount of data over the network, packets will get dropped resulting in 
> damaged data. What would be an ideal way to stop this from happening? I'd 
> appreciate any recommendation.

Can you describe the code you’re using to do this? I assume you end up creating 
a TCP socket between the two hosts, and that will send data reliably. If you’re 
losing data, you may not be writing or reading the data correctly.

You can look at Apple’s CocoaEcho sample code to see how to implement TCP data 
communications. Or at a higher level, I wrote a whole framework to make this 
kind of stuff easier: .

—Jens

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NSFileHandle and Data Integrity

[Tony S. Wu]

Hi,

I have a simple client-server application. I use NSFileHandle to handle the 
communication between client and server. However, NSFileHandle doesn't seem to 
have any sort of guarantee on data integrity because when I try to send large 
amount of data over the network, packets will get dropped resulting in damaged 
data. What would be an ideal way to stop this from happening? I'd appreciate 
any recommendation.

Thanks.

Tony S. Wu
tonyswu@gmail.com




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