Merge pull request #176 from spit4520/master

Added in GET /connections to update restarting node

.gitignore

@@ -7,3 +7,7 @@ log/*
 .vscode/settings.json
 .pre-commit-config.yaml
 hmq.exe
+*.sw*
+*.swo
+*.swp
+*.swn

broker/broker.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"sync"
 	"time"
+	encJson "encoding/json"
 
 	"github.com/fhmq/hmq/broker/lib/sessions"
 	"github.com/fhmq/hmq/broker/lib/topics"
@@ -406,8 +407,19 @@ func (b *Broker) handleConnection(typ int, conn net.Conn) error{
 			}
 		}
 		b.clients.Store(cid, c)
+
+		pubInfo := Info{
+			ClientID: info.clientID,
+			Username: info.username,
+			Password: info.password,
+			Keepalive: info.keepalive,
+			WillMsg: &PubPacket{
+				TopicName: info.willMsg.TopicName,
+				Payload: info.willMsg.Payload,
+			},
+		}
 
-		b.OnlineOfflineNotification(cid, true)
+		b.OnlineOfflineNotification(pubInfo, true, c.lastMsgTime)
 		{
 			b.Publish(&bridge.Elements{
 				ClientID:  msg.ClientIdentifier,
@@ -698,11 +710,33 @@ func (b *Broker) BroadcastUnSubscribe(topicsToUnSubscribeFrom []string) {
 	b.BroadcastSubOrUnsubMessage(unsub)
 }
 
-func (b *Broker) OnlineOfflineNotification(clientID string, online bool) {
+type OnlineOfflineMsg struct {
+	ClientID	string		`json:"clientID"`
+	Online		bool		`json:"online"`
+	Timestamp	string		`json:"timestamp"`
+	ClientInfo	Info		`json:"info"`
+	LastMsgTime	int64		`json:"lastMsg"`
+}
+
+func (b *Broker) OnlineOfflineNotification(info Info, online bool, lastMsg int64) {
 	packet := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
-	packet.TopicName = "$SYS/broker/connection/clients/" + clientID
+	packet.TopicName = "$SYS/broker/connection/clients/" + info.ClientID
 	packet.Qos = 0
-	packet.Payload = []byte(fmt.Sprintf(`{"clientID":"%s","online":%v,"timestamp":"%s"}`, clientID, online, time.Now().UTC().Format(time.RFC3339)))
+
+	msg := OnlineOfflineMsg{
+		ClientID: info.ClientID,
+		Online: online,
+		Timestamp: time.Now().UTC().Format(time.RFC3339),
+		ClientInfo: info,
+		LastMsgTime: lastMsg,
+	}
+
+	if b, err := encJson.Marshal(msg); err != nil {
+		//This is a TERRIBLE situation, falling back to legacy format to not break API Contract
+		packet.Payload = []byte(fmt.Sprintf(`{"clientID":"%s","online":%v,"timestamp":"%s"}`, info.ClientID, online, time.Now().UTC().Format(time.RFC3339)))
+	} else {
+		packet.Payload = b
+	}
 
 	b.PublishMessage(packet)
 }

broker/client.go

@@ -79,6 +79,7 @@ type client struct {
 	mqueue         *queue.Queue
 	retryTimer     *time.Timer
 	retryTimerLock sync.Mutex
+	lastMsgTime	int64
 }
 
 type InflightStatus uint8
@@ -111,6 +112,19 @@ type info struct {
 	remoteIP  string
 }
 
+type PubPacket struct {
+	TopicName	string			`json:"topicName"`
+	Payload		[]byte			`json:"payload"`
+}
+
+type Info struct {
+	ClientID  string			`json:"clientId"`
+	Username  string			`json:"username"`
+	Password  []byte			`json:"password"`
+	Keepalive uint16			`json:"keepalive"`
+	WillMsg   *PubPacket			`json:"willMsg"`
+}
+
 type route struct {
 	remoteID  string
 	remoteUrl string
@@ -122,6 +136,7 @@ var (
 )
 
 func (c *client) init() {
+	c.lastMsgTime = time.Now().Unix()		//mark the connection packet time as last time messaged
 	c.status = Connected
 	c.info.localIP, _, _ = net.SplitHostPort(c.conn.LocalAddr().String())
 	remoteAddr := c.conn.RemoteAddr()
@@ -185,6 +200,8 @@ func (c *client) readLoop() {
 			if _, isDisconnect := packet.(*packets.DisconnectPacket); isDisconnect {
 				c.info.willMsg = nil
 				c.cancelFunc()
+			} else {
+				c.lastMsgTime = time.Now().Unix()
 			}
 
 			msg := &Message{
@@ -842,8 +859,18 @@ func (c *client) Close() {
 
 	if c.typ == CLIENT {
 		b.BroadcastUnSubscribe(unSubTopics)
+		pubInfo := Info{
+			ClientID: c.info.clientID,
+			Username: c.info.username,
+			Password: c.info.password,
+			Keepalive: c.info.keepalive,
+			WillMsg: &PubPacket{
+				TopicName: c.info.willMsg.TopicName,
+				Payload: c.info.willMsg.Payload,
+			},
+		}
 		//offline notification
-		b.OnlineOfflineNotification(c.info.clientID, false)
+		b.OnlineOfflineNotification(pubInfo, false, c.lastMsgTime)
 	}
 
 	if c.info.willMsg != nil {

broker/http.go

@@ -4,10 +4,24 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+const (
+	CONNECTIONS	= "api/v1/connections"
+)
+
+type ConnClient struct {
+	Info				`json:"info"`
+	LastMsgTime	int64		`json:"lastMsg"`
+}
+
+type resp struct {
+	Code	int		`json:"code,omitempty"`
+	Clients	[]ConnClient	`json:"clients,omitempty"`
+}
+
 func InitHTTPMoniter(b *Broker) {
 	gin.SetMode(gin.ReleaseMode)
 	router := gin.Default()
-	router.DELETE("api/v1/connections/:clientid", func(c *gin.Context) {
+	router.DELETE(CONNECTIONS + "/:clientid", func(c *gin.Context) {
 		clientid := c.Param("clientid")
 		cli, ok := b.clients.Load(clientid)
 		if ok {
@@ -16,10 +30,33 @@ func InitHTTPMoniter(b *Broker) {
 				conn.Close()
 			}
 		}
-		resp := map[string]int{
-			"code": 0,
-		}
-		c.JSON(200, &resp)
+		r := resp{Code: 0}
+		c.JSON(200, &r)
+	})
+	router.GET(CONNECTIONS, func(c *gin.Context) {
+		conns := make([]ConnClient, 0)
+		b.clients.Range(func (k, v interface{}) bool {
+			cl, _ := v.(*client)
+
+			msg := ConnClient{
+				Info: Info{
+					ClientID: cl.info.clientID,
+					Username: cl.info.username,
+					Password: cl.info.password,
+					Keepalive: cl.info.keepalive,
+					WillMsg: &PubPacket{
+						TopicName: cl.info.willMsg.TopicName,
+						Payload: cl.info.willMsg.Payload,
+					},
+				},
+				LastMsgTime: cl.lastMsgTime,
+			}
+
+			conns = append(conns, msg)
+			return true
+		})
+		r := resp{Clients: conns}
+		c.JSON(200, &r)
 	})
 
 	router.Run(":" + b.config.HTTPPort)