WARNING According to Apple's guideline, accessing network socket using NSFileSHandle may cause some unknown failures. You still can do that, but I don't recommend it. Instead, use NSStream and CFStream or CFStreamCreatePairWithSocket. You still can use my library to make an established socket connection for those features. I will update code examples as soon as possible if I can make some time.

Eonil/TCPIPSocket.Swift

2015/01/19 Hoon H.

Provides simple, regular, thin, synchronous, asynchronous and minimal TCP/IP socket wrapper on Swift.

This just wraps BSD socket as is, and does not try to add any extra abstraction. I believe this can serve any applications, but I intended this for quicky apps.

How To Use

This is a single file library. TCPIPSocket.swift file into your project. Here's an example that performs an HTTP request.

	let	s	=	TCPIPSocket()
	let	f	=	NSFileHandle(fileDescriptor: s.socketDescriptor)

	s.connect(TCPIPSocketAddress(173, 194, 127, 231), 80)
	f.writeData(("GET / HTTP/1.0\n\n" as NSString).dataUsingEncoding(NSUTF8StringEncoding)!)
	let	d	=	f.readDataToEndOfFile()

	println(NSString(data: d, encoding: NSUTF8StringEncoding)!)

The TCPIPSocket class is the core. And it does not provide any I/O methods. Instead create and use NSFileHandle class to perform actual I/O.

Though this library is originally intended to provide synchronous interface, but also provides asynchronous I/O through NSFileHandle's asynchronous interface. See main.swift for example.

Requirements

Swift 2.1.

"No"s

No I/O functions. Unix can use same I/O functions for sockets and files. And there's no reason to add duplicated functions. Instead, use NSFileHandle class to perform I/O. If you have some existing codebase with NSFileHandle class, it will become available for free.
No DNS resolution. Do it yourself if you need it.
No any other socket mode. Strictly only for TCP/IP. No UDP, no raw, and no any other protocol I never have heard of its name in recent 10 years...

Missings

IPv6 support is a desired feature, but I have no time to work on it. It will be added when I feel need for it.
Some fundamental socket functions such as select. This also will be added when I feel need for it.
DNS resolution service. As a separated feature rather than a part of API.

License