spacebro-client
v0.4.8
Published
π Connect easily to a Spacebro server
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Readme
spacebro client
π Connect easily to a spacebro server.
π Installation
yarn add spacebro-client
# or
npm i -S spacebro-client
π Usage
First, you need to start a spacebro server.
$ npm i -g spacebro # or yarn global add spacebro
$ spacebro
Then, write the following client code:
const { SpacebroClient } = require('spacebro-client')
const client = new SpacebroClient({
host: '127.0.0.1',
port: 36000,
channelName: 'bar',
client: {
name: 'foo',
description: "a foo tool",
in: {
inFoo: {
eventName: "inFoo",
description: "Input foo",
type: "all"
}
},
out: {
outBar: {
eventName: "outBar",
description: "Output bar",
type: "all"
}
}
},
connection: "bar/outBar => bar/inFoo"
})
client.on('inFoo', (data) => console.log('inFoo', data))
client.emit('outBar', { do: stuff})
The connection string was sent to the spacebro server, that will then
connects every event named outBar
from client bar
to a new event
named inFoo
sent to client bar
π API
class SpacebroClient([options], [connect])
Look for a server, and return a handle to the connection.
// For more details about possible options, see below.
const client = new SpacebroClient({
host: '127.0.0.1',
port: 8888,
client: {name: 'foo'},
channelName: 'bar'
})
options:
| name | default | required |Β description |
|:---|:---|:---|:---|
| host | - | required | The spacebro server's address. Ignored if connect
is false. |
| port | - | required | The spacebro server's address. Ignored if connect
is false. |
| client.name | null
| recommended | Your client's name. Can be useful to perform targeted events and for monitoring. |
| channelName | null
| recommended | The channel your app will communicate in. This is especially usefull if you have multiple apps using the same server. |
| verbose | true
| optional | Should spacebro-client display logs (connection / emission / reception)? |
| sendBack | true
| optional | Should this client receive the events it sent? |
connect
If the connect
parameter is false, then the options are saved and a disconnected handle is returned; you have to call its connect
method later before you can emit or receive events.
Default value: true
const client = new SpacebroClient({
client: {name: 'myClient'},
channelName: 'someChannel'
}, false)
// ...
client.connect('127.0.0.1', 8888)
create([options])
Look for a server, and creates a handle to the connection. Takes the same options as new SpacebroClient
. Returns a Promise like client.connect
.
setDefaultSettings(options, [verbose])
Overwrite the default options of new SpacebroClient
with the given options.
If standard-settings is installed in your module, spacebro-client
will call this function with the contents of services.spacebro
from your settings file.
client.connect(address, port)
Look for a server, and connect client
to this server. Returns a Promise that resolves to client
when the connection is established, or throws an error if the connection fails.
client.emit(eventName[, data])
Broadcast a specific event to all the clients in the channel. data
must be a JSON object.
client.sendTo(eventName, target[, data])
Send an event to a specific target in the channel. data
must be a JSON object.
client.on(eventName, handler)
Listen to a specific event.
client.once(eventName, handler)
Listen to a specific event only once.
client.off(eventName)
Remove a specific event listener.
client.disconnect()
Close the connection.
Socket.io callbacks (acknowledgments)
Spacebro now works with acknowlegdments too !
const { SpacebroClient } = require('spacebro-client')
const client = new SpacebroClient({
host: '127.0.0.1',
port: 36000,
channelName: 'bar',
client: {
name: 'foo',
description: "a foo tool",
in: {
inFoo: {
eventName: "inFoo",
description: "Input foo",
type: "all"
}
},
out: {
outBar: {
eventName: "outBar",
description: "Output bar",
type: "all"
}
}
},
connection: "bar/outBar => bar/inFoo"
})
client.on('inFoo', (data, fn) => {
console.log('inFoo', data)
fn('thank you')
})
client.emit('outBar', { do: stuff}, function (data) {
console.log('Received from callback: ' + data)
})
π₯ Browser
You can use spacebro-client in the browser. You will need the following dependencies:
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.1.0/socket.io.js"></script>
<script src="https://wzrd.in/standalone/socketio-wildcard@latest"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-signals/1.0.0/js-signals.min.js"></script>
After adding these dependencies, you can include the spacebro-client lib like any script:
<script src="./dist/spacebro-client.js"></script>
Then use the window.spacebroClient
object.
β Electron
Spacebro-client also works in Electron. You just require('spacebro-client')
in your electron main process and use ipc or web-contents to forward events to the renderer process.
From the example/electron/
folder of this repository:
// In the main process.
const { app, BrowserWindow } = require('electron')
const { SpacebroClient } = require('../../dist/spacebro-client')
let win = null
const client = new SpacebroClient({
host: '127.0.0.1',
port: 8888,
client: {name: 'foo'},
channelName: 'bar'
})
app.on('ready', () => {
win = new BrowserWindow({ width: 800, height: 600 })
win.loadURL(`file://${__dirname}/index.html`)
for (const eventName of ['hello', 'world']) {
client.on(eventName, (data) => {
win.webContents.send(eventName, data)
})
}
win.webContents.on('did-finish-load', () => {
setTimeout(() => { client.emit('hello', { hello: 'world' }) }, 3000)
setTimeout(() => { client.emit('world', { world: 'hello' }) }, 5000)
})
})
<!-- index.html -->
<html>
<body>
<script>
require('electron').ipcRenderer.on('hello', (event, message) => {
console.log(message)
})
require('electron').ipcRenderer.on('world', (event, message) => {
console.log(message)
})
</script>
</body>
</html>
Examples
You can find many real life examples in the example/
folder of this repository.
π³ Troubleshooting
newClient
event π
The Spacebro server automatically broadcasts a newClient
event when a client connects. Thus, you should avoid using that event name. See the example/simple-node
script for more details.
Using native modules in Electron π
If you want to use spacebro-client
in an Electron app, you'll have to use electron-rebuild in order to rebuild MDNS according to the version of Node.js embedded with Electron.
Use the following commands:
$ npm i --save-dev electron-rebuild # or yarn
$ ./node_modules/.bin/electron-rebuild # call the executable every time you add a new native module
You can also add "rebuild": "./node_modules/.bin/electron-rebuild"
to your package.json
and run npm run rebuild
for convenience.
yarn and node-gyp issue (i.e not compiling) π€
You need to use at least yarn version 0.17.8
. You might have similar problems with outdated versions of npm, simply try to update it.
https
If the spacebro server is on https, use following settings:
'service': {
'spacebro': {
'host': 'https://example.com'
'port': 0
}
}
subdir on server
If the server url is something like https://example.com/subdir
. You
can use this url as host. Spacebro will process subdir
as a path,
contrary to socket.io that would process subdir
as a
namespace.
That means the requested urls will look like
https://example.com/subdir/?EIO=3&transport=polling&sid=<id>
ping pong π
Do not try to test with 'ping'
and 'pong'
events, those are reserved.
- `ping`. Fired when a ping packet is written out to the server.
- `pong`. Fired when a pong is received from the server.
β€οΈ Contribute
Please follow Standard JS conventions.
The package has lint testing and unit testing baked-in. Please use npm run test
to run both sets of tests before making a pull request. Use npm run build
to transpile the project.
The project's release versions are named after stars in Andromeda . The current version is named Sirrah.
Enjoy !