react-native-tcp/examples/rctsockets/index.android.js

126 lines
2.7 KiB
JavaScript

/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
AppRegistry,
ScrollView,
StyleSheet,
Text,
View
} from 'react-native';
global.Buffer = global.Buffer || require('buffer').Buffer;
var net = require('net');
function randomPort() {
return Math.random() * 60536 | 0 + 5000; // 60536-65536
}
var serverPort = randomPort();
class RctSockets extends Component {
constructor(props) {
super(props);
this.updateChatter = this.updateChatter.bind(this);
this.state = { chatter: [] };
}
updateChatter(msg) {
this.setState({
chatter: this.state.chatter.concat([msg])
});
}
componentDidMount() {
let server = net.createServer((socket) => {
this.updateChatter('server connected on ' + JSON.stringify(socket.address()));
socket.on('data', (data) => {
this.updateChatter('Server Received: ' + data);
socket.write('Echo server\r\n');
});
socket.on('error', (error) => {
this.updateChatter('error ' + error);
});
}).listen(serverPort, () => {
this.updateChatter('opened server on ' + JSON.stringify(server.address()));
});
server.on('error', (error) => {
this.updateChatter('error ' + error);
});
let client = net.createConnection(serverPort, () => {
this.updateChatter('opened client on ' + JSON.stringify(client.address()));
client.write('Hello, server! Love, Client.');
});
client.on('data', (data) => {
this.updateChatter('Client Received: ' + data);
this.client.destroy(); // kill client after server's response
this.server.close();
});
client.on('error', (error) => {
this.updateChatter('client error ' + error);
});
client.on('close', () => {
this.updateChatter('client close');
});
this.server = server;
this.client = client;
}
componentWillUnmount() {
this.server = null;
this.client = null;
}
render() {
return (
<View style={styles.container}>
<ScrollView>
{this.state.chatter.map((msg, index) => {
return (
<Text key={index} style={styles.welcome}>
{msg}
</Text>
);
})}
</ScrollView>
</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('RctSockets', () => RctSockets);