/
websocket_utils.go
147 lines (132 loc) · 3.6 KB
/
websocket_utils.go
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package util
import (
"fmt"
"log"
"net/http"
"sync"
"time"
"github.com/gorilla/websocket"
)
const (
pongWait = 15 * time.Second
)
type WebSocketEventHub struct {
Connections map[string]*websocket.Conn
listenTag sync.Map
funcMap sync.Map
}
type EventReceiver interface {
OnSuccess(msg []byte)
OnError(err error)
}
type EventReceives struct {
Successes []func(msg []byte)
Errors []func(err error)
}
// NewWebSocketEvent
func NewWebSocketEvent() *WebSocketEventHub {
return &WebSocketEventHub{
Connections: make(map[string]*websocket.Conn),
}
}
func NewEventReceives() *EventReceives {
return &EventReceives{
Successes: make([]func(msg []byte), 0),
Errors: make([]func(err error), 0),
}
}
func createConnection(uri string, headers http.Header) *websocket.Conn {
conn, _, err := websocket.DefaultDialer.Dial(uri, headers)
if err != nil {
log.Fatal("dial:", err)
return nil
}
// conn.SetReadDeadline(time.Now().Add(pongWait))
conn.SetPongHandler(func(appData string) error {
conn.SetReadDeadline(time.Now().Add(pongWait))
return nil
})
return conn
}
func (eventHub *WebSocketEventHub) CreateManagement(eventCode string, websocketHost string, token string) bool {
if eventHub.Connections[eventCode] == nil {
var socketUri = fmt.Sprintf("%s/events/v1/management/sub?code=%s", websocketHost, eventCode)
// fmt.Println(socketUri)
conn := createConnection(socketUri, http.Header{
"Authorization": []string{token},
})
if conn == nil {
return false
}
eventHub.Connections[eventCode] = conn
}
return true
}
func (eventHub *WebSocketEventHub) CreateAuthentication(eventCode string, websocketHost string, token string) bool {
if eventHub.Connections[eventCode] == nil {
var socketUri = fmt.Sprintf("%s/events/v1/authentication/sub?code=%s&token=%s", websocketHost, eventCode, token)
// fmt.Println(socketUri)
conn := createConnection(socketUri, http.Header{})
if conn == nil {
return false
}
eventHub.Connections[eventCode] = conn
}
return true
}
func (eventHub *WebSocketEventHub) AddReceiver(eventCode string, onSuccess func(msg []byte), onError func(err error)) {
receivers := NewEventReceives()
if funcMap, ok := eventHub.funcMap.Load(eventCode); ok {
receivers.Successes = append(funcMap.(*EventReceives).Successes, onSuccess)
receivers.Errors = append(funcMap.(*EventReceives).Errors, onError)
} else {
receivers.Successes = []func(msg []byte){onSuccess}
receivers.Errors = []func(err error){onError}
}
eventHub.funcMap.Store(eventCode, receivers)
}
func connPong(conn *websocket.Conn) {
ticker := time.NewTicker(pongWait)
defer ticker.Stop()
for range ticker.C {
err := conn.WriteMessage(websocket.PongMessage, nil)
if err != nil {
log.Fatal(err)
}
}
}
func (eventHub *WebSocketEventHub) StartReceive(eventCode string) {
started, loaded := eventHub.listenTag.LoadOrStore(eventCode, true)
if loaded && started.(bool) {
return
}
log.Println("start connection receive")
conn := eventHub.Connections[eventCode]
defer conn.Close()
go connPong(conn)
ticker := time.NewTicker(pongWait)
defer ticker.Stop()
begin_time := time.Now()
count := 0
for {
select {
case <-ticker.C:
log.Printf("received %v messages, has been running for %v seconds", count, time.Since(begin_time).Seconds())
default:
_, message, err := conn.ReadMessage()
if funcMap, ok := eventHub.funcMap.Load(eventCode); ok {
funcs := funcMap.(*EventReceives)
if err != nil {
for _, onError := range funcs.Errors {
onError(err)
}
} else {
for _, onSuccess := range funcs.Successes {
onSuccess(message)
}
}
}
count += 1
}
}
}