[英]How to use feathersjs-primus to setup websocket connection
I am trying to setup websocket by feathers js + primus following from this link: https://docs.feathersjs.com/real-time/primus.html . 我正在尝试通过此链接通过羽毛js + primus设置websocket: https : //docs.feathersjs.com/real-time/primus.html 。 But I don't know how to get spark instance from primus in server side. 但是我不知道如何从服务器端的primus获取spark实例。 Below is my server code: 下面是我的服务器代码:
class SocketService {
create(data, params, callback){
...
}
}
module.exports = function(){
const app = this
let ss = new SocketService()
app.use('socket-shell', ss);
}
In above code, server can get the message from client in create() method. 在上面的代码中,服务器可以通过create()方法从客户端获取消息。 But how can I get spark instance from primus in that method? 但是,如何通过这种方法从primus获取spark实例? I want to use spark.write
method to send message back to the client. 我想使用spark.write
方法将消息发送回客户端。
Below is the server code for configuring feathers services: 以下是用于配置羽毛服务的服务器代码:
app
.use(compress())
.options('*', cors())
.use(cors())
// .use(favicon(path.join(app.get('public'), 'favicon.ico')))
.use('/', serveStatic(app.get('public')))
.use(bodyParser.json())
.use(bodyParser.urlencoded({extended: true}))
.configure(hooks())
.configure(rest())
.configure(primus({
transformer: 'websockets',
timeout: false,
}, (primus) => {
app.use('socket-shell', function(socket, done){
// Exposing a request property to services and hooks
socket.request.feathers.referrer = socket.request.referrer;
done();
});
}))
.configure(services)
.configure(middleware);
Below code is used to registering a event listener on server side but it can't receive event from client: 以下代码用于在服务器端注册事件侦听器,但无法从客户端接收事件:
class SocketService {
constructor(options) {
this.events = [ 'someevent','serverevent' ]
}
setup(app) {
this.app = app;
let socketService = app.service('socket-shell')
socketService.addListener('serverevent', this.serverevent)
}
serverevent(msg){
console.log('serverevent', msg)
}
In client code, I use below code to emit message to server: 在客户端代码中,我使用以下代码向服务器发送消息:
var primus = new Primus('http://localhost:3030');
var app = feathers()
.configure(feathers.hooks())
.configure(feathers.primus(primus));
var messageService = app.service('/socket-shell');
messageService.emit('serverevent', {msg:'this is client'})
what wrong with above code? 上面的代码有什么问题?
Ideally you wouldn't use the socket connection directly in your service. 理想情况下,您不会在服务中直接使用套接字连接。 A service shouldn't know about how it is being accessed. 服务不应该知道如何访问它。 There are two options: 有两种选择:
app.configure(primus(
在app.configure(primus(
-- -
class SocketService {
constructor() {
this.events = [ 'someevent' ];
}
create(data, params, callback){
this.emit('someevent', 'data');
}
}
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