108 lines
2.5 KiB
Markdown
108 lines
2.5 KiB
Markdown
# UDP in React Native
|
|
|
|
node's [dgram](https://nodejs.org/api/dgram.html) API in React Native
|
|
|
|
This module is used by [Tradle](https://github.com/tradle)
|
|
|
|
## Install
|
|
|
|
* Create a new react-native project. [Check react-native getting started](http://facebook.github.io/react-native/docs/getting-started.html#content)
|
|
|
|
* In your project dir:
|
|
```
|
|
npm install --save react-native-udp
|
|
```
|
|
|
|
## Link in the native dependency
|
|
|
|
```
|
|
react-native link react-native-udp
|
|
# OR, if you're using react-native older than 0.31:
|
|
rnpm link react-native-udp
|
|
```
|
|
|
|
### `Android`
|
|
|
|
* Register and load the Native Module in your Main application
|
|
([import](examples/rctsockets/android/app/src/main/java/com/rctsockets/MainApplication.java#L11), [getPackages](examples/rctsockets/android/app/src/main/java/com/rctsockets/MainApplication.java#L28))
|
|
* __Note:__ prior to react-native 0.29.2, this should happen in your Main Activity
|
|
|
|
```java
|
|
...
|
|
|
|
import com.tradle.react.UdpSocketsModule; // <--- import //
|
|
|
|
public class MainApplication extends Application implements ReactApplication {
|
|
...
|
|
@Override
|
|
protected List<ReactPackage> getPackages() {
|
|
return Arrays.<ReactPackage>asList(
|
|
new MainReactPackage(),
|
|
new UdpSocketsModule() // <- add here //
|
|
);
|
|
}
|
|
}
|
|
```
|
|
|
|
Buckle up, Dorothy
|
|
|
|
## Usage
|
|
|
|
### package.json
|
|
|
|
_only if you want to write require('dgram') in your javascript_
|
|
|
|
```json
|
|
{
|
|
"browser": {
|
|
"dgram": "react-native-udp"
|
|
}
|
|
}
|
|
```
|
|
|
|
### JS
|
|
|
|
_see/run [index.js](examples/rctsockets) for a complete example, but basically it's just like dgram_
|
|
|
|
```js
|
|
var dgram = require('dgram')
|
|
// OR, if not shimming via package.json "browser" field:
|
|
// var dgram = require('react-native-udp')
|
|
var socket = dgram.createSocket('udp4')
|
|
socket.bind(12345)
|
|
socket.once('listening', function() {
|
|
var buf = toByteArray('excellent!')
|
|
socket.send(buf, 0, buf.length, remotePort, remoteHost, function(err) {
|
|
if (err) throw err
|
|
|
|
console.log('message was sent')
|
|
})
|
|
})
|
|
|
|
socket.on('message', function(msg, rinfo) {
|
|
console.log('message was received', msg)
|
|
})
|
|
```
|
|
|
|
### Note
|
|
|
|
If you want to send and receive node Buffer objects, you'll have to "npm install buffer" and set it as a global for UdpSockets to pick it up:
|
|
|
|
```js
|
|
global.Buffer = global.Buffer || require('buffer').Buffer
|
|
```
|
|
|
|
### TODO
|
|
|
|
add select tests from node's tests for dgram
|
|
|
|
## Contributors
|
|
|
|
[Mark Vayngrib](https://github.com/mvayngrib)
|
|
[Ellen Katsnelson](https://github.com/pgmemk)
|
|
[Tradle, Inc.](https://github.com/tradle/about/wiki)
|
|
|
|
[Andy Prock](https://github.com/aprock)
|
|
|
|
PR's welcome!
|