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Question to PB command SendNetworkData
Posted: Fri Jul 09, 2010 3:10 pm
by helpy
Hello all,
I have a question to the Result of the PB command
SendNetworkData:
The 'Result' is the number of bytes, that was actually sent. If it is not equal to the 'Length' parameter, the receiving buffer of the user is probally full. If nothing could be sent then 'Result' will equal -1.
If I send a block (block header has information about content and block length) and SendNetworkData() returns a vlaue between '0' and 'length'.
Does that mean, that I have to send the whole block again ... or do I only have to send the part of the block, which hast not already been sent?
cu, helpy
Re: Question to PB command SendNetworkData
Posted: Sat Jul 10, 2010 12:57 am
by idle
Yes you keep sending until its done, mostly the error you'll get is from the send buffer being full.
something like this
Code: Select all
#WSAEWOULDBLOCK = 10035
#WSAECONNABORTED = 10053
Procedure Send(Connection.i,*DataBuffer,Size)
Protected delay.i,Tx.i,Result.i,bConnectionDropped.i,timeOut.i,bTimeout.i
Timeout = ElapsedMilliseconds() + 5000
Repeat
Result = SendNetworkData(Connection ,*DataBuffer+Tx,Size-Tx)
If Result <> -1
Tx = Tx + Result
delay=0
timeout = ElapsedMilliseconds() + 5000
Else
err = WSAGetLastError_()
If err = #WSAECONNABORTED
bConnectionDropped = 1
Break
ElseIf err = #WSAEWOULDBLOCK
delay = 50
EndIf
If ElapsedMilliseconds() > timeout
btimeout = 1
Break
EndIf
EndIf
Delay(delay)
Until Tx = Size
If bConnectionDropped Or bTimeout
ProcedureReturn 0
Else
ProcedureReturn Tx
EndIf
EndProcedure
Re: Question to PB command SendNetworkData
Posted: Sat Jul 10, 2010 11:39 am
by helpy
Thank you idle ... now I understand a bit more
Sometimes it would be helpful, if there would be some more information in the PureBasic help (i.e. SendNetworkData and also
ReceiveNetworkData, ...)
cu, helpy