telebit/connection.go

package main

import (
	"encoding/hex"

	"time"

	"github.com/gorilla/websocket"
)

var upgrader = websocket.Upgrader{
	ReadBufferSize:  1024,
	WriteBufferSize: 1024,
}

// Connection track websocket and faciliates in and out data
type Connection struct {
	connectionTable *ConnectionTable

	// The websocket connection.
	conn *websocket.Conn

	// Buffered channel of outbound messages.
	send chan []byte

	// Address of the Remote End Point
	source string

	// admin flag.  Grants access to admin features
	admin bool

	// bytes in
	bytesIn int64

	// bytes out
	bytesOut int64
}

func (c *Connection) addIn(num int64) {
	c.bytesIn = c.bytesIn + num
}

func (c *Connection) addOut(num int64) {
	c.bytesOut = c.bytesOut + num
}

func (c *Connection) reader() {
	defer func() {
		c.connectionTable.unregister <- c
		c.conn.Close()
	}()
	c.conn.SetReadLimit(maxMessageSize)
	for {
		_, message, err := c.conn.ReadMessage()
		if err != nil {
			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
				loginfo.Printf("error: %v", err)
			}
			break
		}
		loginfo.Println(hex.Dump(message))
		c.addIn(int64(len(message)))
		loginfo.Println(c)
	}
}

func (c *Connection) writer() {
	dwell := time.NewTicker(5 * time.Second)
	loginfo.Println("activate timer", dwell)
	defer func() {
		c.conn.Close()
	}()
	for {
		select {

		case message := <-c.send:
			w, err := c.conn.NextWriter(websocket.TextMessage)
			if err != nil {
				return
			}
			w.Write(message)

			if err := w.Close(); err != nil {
				return
			}

			c.addOut(int64(len(message)))
		}
	}
}

func (c *Connection) sender() {
	dwell := time.NewTicker(5 * time.Second)
	loginfo.Println("activate timer", dwell)
	defer func() {
		c.conn.Close()
	}()
	for {
		select {
		case <-dwell.C:
			loginfo.Println("Dwell Activated")
			c.send <- []byte("This is a test")
		}
	}
}