#react-native-signalr
Connect to your SignalR-server with a active websocket-connection from react-native. Supports all error-handling and reconnection, including longpolling if needed.
Today the module shims the jQuery-dependency that signalr has. There is however an ongoing task upstream to remove this dependency.
Does NOT pull in the entire jQuery-library. Only shimes the few methods SignalR needs. Tested on iOS and Android. No known issues.
#Install:
npm i react-native-signalr --save
There is an example server setup at http://react-native-signalr.azurewebsites.net (no webite, only responds to signalr) If it's up and running, you can use it to debug against. You can find the source for that server under examples/server. The code below uses that server to setup a connection and communicate over websockets using signalr.
#Awesome-project:
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View,
} from 'react-native';
import signalr from 'react-native-signalr';
class AwesomeProject extends Component {
componentDidMount() {
//This is the server under /example/server published on azure.
const connection = signalr.hubConnection('http://react-native-signalr.azurewebsites.net');
connection.logging = true;
const proxy = connection.createHubProxy('chatHub');
//receives broadcast messages from a hub function, called "helloApp"
proxy.on('helloApp', (argOne, argTwo, argThree, argFour) => {
console.log('message-from-server', argOne, argTwo, argThree, argFour);
//Here I could response by calling something else on the server...
});
// atempt connection, and handle errors
connection.start().done(() => {
console.log('Now connected, connection ID=' + connection.id);
proxy.invoke('helloServer', 'Hello Server, how are you?')
.done((directResponse) => {
console.log('direct-response-from-server', directResponse);
}).fail(() => {
console.warn('Something went wrong when calling server, it might not be up and running?')
});
}).fail(() => {
console.log('Failed');
});
//connection-handling
connection.connectionSlow(() => {
console.log('We are currently experiencing difficulties with the connection.')
});
connection.error((error) => {
const errorMessage = error.message;
let detailedError = '';
if (error.source && error.source._response) {
detailedError = error.source._response;
}
if (detailedError === 'An SSL error has occurred and a secure connection to the server cannot be made.') {
console.log('When using react-native-signalr on ios with http remember to enable http in App Transport Security https://github.com/olofd/react-native-signalr/issues/14')
}
console.debug('SignalR error: ' + errorMessage, detailedError)
});
}
render() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome to React Native!
</Text>
<Text style={styles.instructions}>
To get started, edit index.ios.js
</Text>
<Text style={styles.instructions}>
Press Cmd+R to reload,{'\n'}
Cmd+D or shake for dev menu
</Text>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});
AppRegistry.registerComponent('AwesomeProject', () => AwesomeProject);