CRLF at the end of data

[Simeon Mitev]

Do I always need to append CRLF at the end of data in order to avoid any
network packet shipment delay?

[data appendData:[GCDAsyncSocket CRLFData]];

Thanks

[Robbie Hanson]

It doesn't really have anything to do with delay. This should help clear things up for you:

https://github.com/robbiehanson/CocoaAsyncSocket/wiki/CommonPitfalls

-Robbie Hanson
Sent from my iPhone

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[Simeon Mitev]

Agreed. TCP has nothing to do with the data get actually sent.

I have another question related to the options being set to the socket
during socket initialization.

I did not find any other way to set TCP_NODELAY to 1. I had to put these
lines into the source code:

int flag = 1;
int result = setsockopt(socketFD, IPPROTO_TCP, TCP_NODELAY, (char
*)&flag, sizeof(int));
if (result == -1) {
NSString *reason = @"Could Not Disable Nagle...";
err = [[self errnoErrorWithReason:reason] retain];
close(socketFD);
return SOCKET_NULL;
}

Personally I prefer to have a getter which provides me with the socket
structure or some call back function getting invoked during socket
initialization.

Have I missed something?

[Robbie Hanson]

You can do this without modifying GCDAsyncSocket. Check out the header file for getter methods for the socketFD.

You could, for example, set the nodelay flag in socketDidConnect.

PS - there is a caveat to this which you may find odd. You'll need to execute your code within a performBlock (another method documented in the header). But when you read the documentation for it, you'll see why.

- (void)socket:(...)sender didConnect:(...)addr {
[asyncSocket performBlock:^{
int socketFD = [asyncSocket socketFD];
... your nagle stuff here...
}];

}

-Robbie Hanson
Sent from my iPhone

[Simeon Mitev]

It worked! Thank you Robbie.