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0.0 1.0 0.0 10.92 MB

socket.io library for golang, a realtime application framework.

License: Other

Go 93.42% HTML 2.65% Makefile 0.27% Shell 3.66%

go-socket.io's Introduction

go-socket.io

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go-socket.io is an implementation of Socket.IO in Golang, which is a realtime application framework.

Currently this library supports 1.4 version of the Socket.IO client. It supports room and namespaces.

Go 1.9+ is required!

Help wanted This project is looking for contributors to help fix bugs and implement new features. Please check Issue 192. All help is much appreciated.

  • for compatibility with Socket.IO 0.9.x, please use branch 0.9.x *

Contents

Install

Install the package with:

go get github.com/googollee/go-socket.io

Import it with:

import "github.com/googollee/go-socket.io"

and use socketio as the package name inside the code.

Last changes

Important changes:

Short info Description Date
Changed signature of OnError Changed signature of OnError From: server.OnError(string, func(error)) To: server.OnError(string, func(Conn, error)) 2019-10-16

Example

Please check the example folder for details.

package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/googollee/go-socket.io"
)

func main() {
	server, err := socketio.NewServer(nil)
	if err != nil {
		log.Fatal(err)
	}
	server.OnConnect("/", func(s socketio.Conn) error {
		s.SetContext("")
		fmt.Println("connected:", s.ID())
		return nil
	})
	server.OnEvent("/", "notice", func(s socketio.Conn, msg string) {
		fmt.Println("notice:", msg)
		s.Emit("reply", "have "+msg)
	})
	server.OnEvent("/chat", "msg", func(s socketio.Conn, msg string) string {
		s.SetContext(msg)
		return "recv " + msg
	})
	server.OnEvent("/", "bye", func(s socketio.Conn) string {
		last := s.Context().(string)
		s.Emit("bye", last)
		s.Close()
		return last
	})
	server.OnError("/", func(s socketio.Conn, e error) {
		fmt.Println("meet error:", e)
	})
	server.OnDisconnect("/", func(s socketio.Conn, reason string) {
		fmt.Println("closed", reason)
	})
	go server.Serve()
	defer server.Close()

	http.Handle("/socket.io/", server)
	http.Handle("/", http.FileServer(http.Dir("./asset")))
	log.Println("Serving at localhost:8000...")
	log.Fatal(http.ListenAndServe(":8000", nil))
}

Acknowledgements in go-socket.io 1.X.X

See documentation about acknowledgements

Sending ACK with data from SERVER to CLIENT
  • Client-side
 //using client-side socket.io-1.X.X.js
 socket.emit('some:event', JSON.stringify(someData), function(data){
       console.log('ACK from server wtih data: ', data));
 });
  • Server-side
// The return type may vary depending on whether you will return
// In golang implementation of Socket.IO don't used callbacks for acknowledgement,
// but used return value, which wrapped into ack package and returned to the client's callback in JavaScript
so.On("some:event", func(msg string) string {
	return msg //Sending ack with data in msg back to client, using "return statement"
})
Sending ACK with data from CLIENT to SERVER
  • Client-side
//using client-side socket.io-1.X.X.js
//last parameter of "on" handler is callback for sending ack to server with data or without data
socket.on('some:event', function (msg, sendAckCb) {
    //Sending ACK with data to server after receiving some:event from server
    sendAckCb(JSON.stringify(data)); // for example used serializing to JSON
}
  • Server-side
//You can use Emit or BroadcastTo with last parameter as callback for handling ack from client
//Sending packet to room "room_name" and event "some:event"
so.BroadcastTo("room_name", "some:event", dataForClient, func (so socketio.Socket, data string) {
	log.Println("Client ACK with data: ", data)
})

// Or

so.Emit("some:event", dataForClient, func (so socketio.Socket, data string) {
	log.Println("Client ACK with data: ", data)
})
Cautch Disconnected reason
  • Server-side
so.OnDisconnect("/", func(so socketio.Conn, reason string) {
  	log.Println("closed", reason)
})

Possible reasons:

Reason Side Description
client namespace disconnect Client Side Got disconnect packet from client

Community

Telegram chat: @go_socketio

Contributors

This project exists thanks to all the people who contribute. [Contribute].

License

The 3-clause BSD License - see LICENSE for more details

go-socket.io's People

Contributors

googollee avatar sshaplygin avatar erkie avatar hongruiqi avatar cyberlight avatar adrianmxb avatar ipv4sec avatar dimagv avatar bguiz avatar orlovevgeny avatar nazri avatar rykov avatar mchiodo avatar fujimoto avatar zyxar avatar chappjc avatar 1lann avatar mottl avatar disruptivemind avatar nrandell avatar nkovacs avatar cousine avatar pborreli avatar fuel-shea avatar viniciuswebdev avatar aitjcize avatar ardingchen avatar artushin avatar f4th4n avatar kunaldawn avatar

Watchers

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