Socket.io iOS and OSX Client compatible with v1.0 and later

SocketIO-Kit is a Socket.io iOS client with type safe, clean syntax and speed in mind. WebSocket is the only transport that is implemented and it uses SwiftWebSocket.

Installation

Carthage

github "ricardopereira/SocketIO-Kit"

Then run carthage update.

Follow the current instructions in Carthage's README
for up to date installation instructions.

CocoaPods

To install it, simply add the following line to your Podfile:

pod "SocketIOKit"

You will also need to make sure you're opting into using frameworks:

use_frameworks!

Then run pod install with CocoaPods 0.36 or newer.

Manually

Download the project and copy the SocketIO-Kit folder into your project and use the Source files. You need Runes v2.0.0 (Swift 1.2) framework to run SocketIO-Kit because it uses infix operators for monadic functions and you need SwiftWebSocket v0.1.18 (Swift 1.2).

There is no need for import SocketIOKit when manually installing.

Requirements

• iOS 8.0+ / Mac OS X 10.10+
• Xcode 6.3 (Swift 1.2)

⚠️ Swift 2.0 version, please use branch Swift2.

Usage

import SocketIOKit

// Type safety events
enum AppEvents: String, Printable {
    case ChatMessage = "chat message"
    case GetImage = "getimage"
    case Image = "image"
    
    var description: String {
        return self.rawValue
    }
}

// Mutable
var socket: SocketIO<AppEvents>!
socket = SocketIO(url: "http://localhost:8000/")

// or 
// Immutable
let socket = SocketIO<AppEvents>(url: "http://localhost:8000/")

socket.on(.ConnectError) {
    switch $0 {
    case .Failure(let error):
        println(error)
    default:
        break
    }
}.on(.TransportError) {
    switch $0 {
    case .Failure(let error):
        println("WebSocket error: \(error)")
    default:
        break
    }
}.on(.Connected) { result in
    println("Connected")
    socket.emit(.ChatMessage, withMessage: "I'm iOS")
}.on(.Disconnected) { result in
    switch result {
    case .Message(let reason):
        println("Disconnected: \(reason)")
    default:
        break
    }
}

socket.on(.ChatMessage) {
    switch $0 {
    case .Message(let message):
        println("Remote: \(message)")
    default:
        println("Not supported")
    }
}

socket.connect()

Options

socket = SocketIO(url: "http://localhost:8001/", withOptions: SocketIOOptions().namespace("/gallery"))

Examples

Retrieving an image

// NodeJS Server
var io = require('socket.io')(http)
var fs = require('fs')

io.on('connection', function(socket) {
  socket.on('getimage', function(msg) {
    // Image
    fs.readFile(__dirname + '/image.png', function(err, buf){
      // It's possible to embed binary data within arbitrarily-complex objects
      socket.emit('image', { image: true, buffer: buf.toString('base64') });
    });
  });
});

// SocketIO-Kit Client
socket.on(.Image) {
    switch $0 {
    case .JSON(let json):
        if let image = json["buffer"] as? String >>- SocketIOUtilities.base64EncodedStringToUIImage {
            println(image)
        }
    default:
        println("Not supported")
    }
}

Working with structs

struct ImageInfo: SocketIOObject {
    
    let buffer: String
    
    init(buffer: String) {
        self.buffer = buffer
    }
    
    init(dict: NSDictionary) {
        self.init(buffer: dict["buffer"] as! String) //Force casts should be avoided!
    }
    
    var asDictionary: NSDictionary {
        return ["buffer": buffer]
    }
    
}

// Example using ImageInfo
socket.on(.Image) {
    switch $0 {
    case .JSON(let json):
        let imageInfo = ImageInfo(dict: json) //<---
        
        if let image = imageInfo.buffer >>- SocketIOUtilities.base64EncodedStringToUIImage {
            println(image)
        }
    default:
        println("Not supported")
    }
}

Working with classes

class Person: SocketIOObject {
    
    let name: String
    
    init(name: String) {
        self.name = name
    }
    
    convenience required init(dict: NSDictionary) {
        self.init(name: dict["name"] as! String) //Force casts should be avoided!
    }
    
    var asDictionary: NSDictionary {
        return ["name": name]
    }
    
}

// Example sending John instance
let john = Person(name: "John")

socket.emit(.Login, withObject: john)

Features

To implement

• [ ] Reconnect automatically
• [x] Complete documentation
• [ ] Test on iOS 7.0+ and Mac OS X 10.9+
• [ ] BDD Tests

Debugging

You can opt into seeing messages by supplying the DEBUG flag. Just add -D DEBUG in Build Settings > Swift Compiler - Custom Flags: Other Swift Flags.

Contributing

See the CONTRIBUTING document. Thank you, contributors!

Author

Ricardo Pereira, @ricardopereiraw

GitHub

https://github.com/ricardopereira/SocketIO-Kit