A React Native wrapper for the Socket.io Library

This project was forked from Kirkness' React Native Swift Socket.Io project found here

This project now supports both iOS and Android using the same JS calls.

• Exceptions:

• The Android version does not support manual reconnects, joinNamespace, or leaveNamespace

• The wrapped libraries can be found here:

• Socket.IO-Client-Swift.

• Socket.IO-Client-Java.

Example

Kirkness added a super simple example app to /examples, copy and paste to your index.ios.js.

/**
 * Pass in an optional config obj, this can include most of the
 * standard props supported by the swift library
 */
var socketConfig = { path: '/socket' };
var socket = new SocketIO('localhost:3000', socketConfig);

// Connect!
socket.connect();

// An event to be fired on connection to socket
socket.on('connect', () => {
    console.log('Wahey -> connected!');
});

// Event called when 'someEvent' it emitted by server
socket.on('someEvent', (data) => {
    console.log('Some event was called, check out this data: ', data);
});

// Called when anything is emitted by the server
socket.onAny((event) => {
    console.log(`${event.name} was called with data: `, event.items);
});

// Manually join namespace. Ex: namespace is now partyRoom
socket.joinNamespace('partyRoom')

// Leave namespace, back to '/'
socket.leaveNamespace()

// Emit an event to server
socket.emit('helloWorld', {some: 'data'});

//Disconnect from server
socket.disconnect();

// Reconnect to a closed socket
socket.reconnect();

Constructor

Requires: host - example: 'localhost:3000'

Optional: config - JSON object comprising any of the options listed below.

Config

• Please note that the Android version does not support all of these options yet. It's very much a work in progress.

• connectParams: Any Object - Any data to be sent with the connection.
• reconnects: Boolean Default is true
• reconnectAttempts: Int Default is -1 (infinite tries)
• reconnectWait: Number Default is 10
• forcePolling: Boolean Default is false. true forces the client to use xhr-polling.
• forceWebsockets: Boolean Default is false. true forces the client to use WebSockets.
• nsp: String Default is "/". Connects to a namespace.
• log: Bool If true socket will log debug messages. Default is false.
• path: String - If the server uses a custom path. ex: "/swift". Default is ""

Not supported yet but easy enough to implement.

• cookies: [NSHTTPCookie]? An array of NSHTTPCookies. Passed during the handshake. Default is nil.
• sessionDelegate: NSURLSessionDelegate Sets an NSURLSessionDelegate for the underlying engine. Useful if you need to handle self-signed certs. Default is nil.

Methods

• connect - Connect to socket
• on - Add event handler to socket
  • @param - String - event name
  • @param - Function - callback
• onAny - Add event handler to any event
  • @param - Function - callback
• emit - Emit an event to server
  • @param - String - Event name
  • @param - Anything - Data to be sent
• disconnect - Close the connection
• reconnect - Reconnect to a closed connection
• joinNamespace - Manually join namespace
  • @param - String - Namespace
• leaveNamespace - Leave namespace, back to '/'

Known issues

• Would rather this in an xcode framework but run into non-modular header issue.
• Android needs more configuration option support.
• Both implementations need unit testing.

Install

• Run in your project:

$ npm install react-native-socketio

iOS

• Note as of May 19, 2016 that the path to the ios components has been moved from root to the /ios folder.

• Open up your project in xcode and right click the package.
• Click Add files to 'Your project name'
• Navigate to /node_modules/react-native-socketio/ios/RNSwiftSocketIO
• Click 'Add'
• Click your project in the navigator on the left and go to build settings
• Search for Objective-C Bridging Header
• Double click on the empty column
• Enter ../node_modules/react-native-socketio/ios/RNSwiftSocketIO/SocketBridge.h
• Search for Header Search Paths
• Double Click on the column (likely has other search paths in it already)
• Enter this text at the bottom of the column $(SRCROOT)/../node_modules/react-native-socketio/ios/RNSwiftSocketIO

Android

1. In android/setting.gradle

   ...
   include ':SocketIo'
   project(':SocketIo').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-socketio/android')
   

2. In android/app/build.gradle

   ...
   dependencies {
       ...
       compile project(':SocketIo')
   }
   

3. Register module (in MainActivity.java)

   import com.gcrabtree.rctsocketio.SocketIoPackage;  // <--- import
   
   public class MainActivity extends ReactActivity {
     ......
   
     @Override
     protected List<ReactPackage> getPackages() {
       return Arrays.<ReactPackage>asList(
         new MainReactPackage(),
         new VectorIconsPackage(),
         new OrientationPackage(this),
         new SocketIoPackage()   // <--- Add here!
     );
   }
   
     ......
   
   }