commit 2021-12-17]09:17:23

.gitignore

@@ -1 +1,2 @@
 public/
+front/

containers/devicemanagera/constants/constants.go

@@ -0,0 +1,32 @@
+package constants
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"strings"
+)
+
+func getIP() string {
+	host, _ := os.Hostname()
+	addrs, _ := net.LookupIP(host)
+
+	return addrs[0].String()
+}
+
+var ServerAddr string
+var MyIP string
+
+func init() {
+	var exist bool
+	ServerAddr, exist = os.LookupEnv("SERVER_ADDR")
+	if !exist {
+		fmt.Println("Please set SERVER_ADDR as environment variable")
+	}
+
+	MyIP = getIP()
+	idx := strings.LastIndex(MyIP, ".")
+	ServerAddr = MyIP[:idx+1] + "1"
+	fmt.Println(ServerAddr)
+
+}

containers/devicemanagera/go.mod

@@ -1,3 +1,8 @@
-module devicemanagera
+module devicemanagerb
 
 go 1.17
+
+require (
+	github.com/gorilla/mux v1.7.4
+	github.com/urfave/negroni v1.0.0
+)

containers/devicemanagera/go.sum

@@ -0,0 +1,4 @@
+github.com/gorilla/mux v1.7.4 h1:VuZ8uybHlWmqV03+zRzdwKL4tUnIp1MAQtp1mIFE1bc=
+github.com/gorilla/mux v1.7.4/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/urfave/negroni v1.0.0 h1:kIimOitoypq34K7TG7DUaJ9kq/N4Ofuwi1sjz0KipXc=
+github.com/urfave/negroni v1.0.0/go.mod h1:Meg73S6kFm/4PpbYdq35yYWoCZ9mS/YSx+lKnmiohz4=

containers/devicemanagera/main.go

@@ -2,50 +2,30 @@ package main
 
 import (
 	"bytes"
-	"devicemanagera/router"
+	"devicemanagerb/constants"
+	"devicemanagerb/router"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
-	"net"
 	"net/http"
-	"os"
-	"strings"
 )
 
-var server_addr string
-
-func getIP() string {
-	host, _ := os.Hostname()
-	addrs, _ := net.LookupIP(host)
-
-	return addrs[0].String()
-}
-
 func registerToServer() {
-	var exist bool
-	server_addr, exist = os.LookupEnv("SERVER_ADDR")
-	if !exist {
-		fmt.Println("Please set SERVER_ADDR as environment variable")
-	}
-
-	ip := getIP()
-	idx := strings.LastIndex(ip, ".")
-	serverAddr := ip[:idx+1] + "1"
-	fmt.Println(serverAddr)
 
 	var obj map[string]string = make(map[string]string)
 	obj["name"] = "devicemanagera"
-	obj["addr"] = getIP() + ":3000"
+	obj["addr"] = constants.MyIP + ":3000"
 
 	b, err := json.Marshal(obj)
 	if err != nil {
 		panic(err)
 	}
 
-	req, err := http.NewRequest("PUT", "http://"+serverAddr+":3000/services", bytes.NewBuffer(b))
+	req, err := http.NewRequest("PUT", "http://"+constants.ServerAddr+":3000/services", bytes.NewBuffer(b))
 	if err != nil {
 		panic(err)
 	}
+
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		panic(err)
@@ -56,7 +36,6 @@ func registerToServer() {
 		panic(err)
 	}
 	fmt.Println(string(b))
-	// http.Post("")
 }
 
 func main() {

containers/devicemanagera/router/route.go

@@ -1,15 +1,140 @@
 package router
 
 import (
+	"bytes"
+	"devicemanagerb/constants"
+	"encoding/json"
+	"log"
 	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/urfave/negroni"
 )
 
 func NewRouter() http.Handler {
-	mux := http.NewServeMux()
+	mux := mux.NewRouter()
-	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	// mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
+	// 	w.WriteHeader(http.StatusOK)
-		w.Write([]byte("I am devicemanagerA"))
+	// 	w.Write([]byte("I am devicemanagerB"))
-	})
+	// })
 
-	return mux
+	mux.HandleFunc("/{id}", PutStatusChangedHandle).Methods("PUT")
+	mux.HandleFunc("/{id}", PostStatusChangedHandle).Methods("POST")
+	mux.HandleFunc("/{id}", GetStatusHandle).Methods("GET")
+
+	n := negroni.Classic()
+	n.UseHandler(mux)
+	return n
 }
+
+// sensing data per device
+var state = map[string]interface{}{}
+
+// status from sensor
+func PutStatusChangedHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	_status := map[string]interface{}{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&_status)
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	// state[did] = _status
+	// log.Println(state[did])
+
+	_, ok = state[did]
+	if !ok {
+		state[did] = _status
+	}
+
+	b, err := json.Marshal(state[did])
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	w.Write(b)
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+
+	req, err := http.NewRequest("PUT", "http://"+constants.ServerAddr+":3000/device/"+did, bytes.NewReader(b))
+	if err != nil {
+		return
+	}
+
+	_, err = http.DefaultClient.Do(req)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func GetStatusHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	_status, ok := state[did]
+	if !ok {
+		_status = map[string]interface{}{
+			"msg": "hello world",
+		}
+	}
+
+	encoder := json.NewEncoder(w)
+
+	err := encoder.Encode(_status)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+}
+
+func PostStatusChangedHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	_status := map[string]interface{}{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&_status)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	state[did] = _status
+	log.Println(_status)
+
+	w.WriteHeader(http.StatusOK)
+}
+
+// status from user per device

containers/devicemanagerb/constants/constants.go

@@ -0,0 +1,32 @@
+package constants
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"strings"
+)
+
+func getIP() string {
+	host, _ := os.Hostname()
+	addrs, _ := net.LookupIP(host)
+
+	return addrs[0].String()
+}
+
+var ServerAddr string
+var MyIP string
+
+func init() {
+	var exist bool
+	ServerAddr, exist = os.LookupEnv("SERVER_ADDR")
+	if !exist {
+		fmt.Println("Please set SERVER_ADDR as environment variable")
+	}
+
+	MyIP = getIP()
+	idx := strings.LastIndex(MyIP, ".")
+	ServerAddr = MyIP[:idx+1] + "1"
+	fmt.Println(ServerAddr)
+
+}

containers/devicemanagerb/go.mod

@@ -1,3 +1,8 @@
 module devicemanagerb
 
 go 1.17
+
+require (
+	github.com/gorilla/mux v1.7.4
+	github.com/urfave/negroni v1.0.0
+)

containers/devicemanagerb/go.sum

@@ -0,0 +1,4 @@
+github.com/gorilla/mux v1.7.4 h1:VuZ8uybHlWmqV03+zRzdwKL4tUnIp1MAQtp1mIFE1bc=
+github.com/gorilla/mux v1.7.4/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/urfave/negroni v1.0.0 h1:kIimOitoypq34K7TG7DUaJ9kq/N4Ofuwi1sjz0KipXc=
+github.com/urfave/negroni v1.0.0/go.mod h1:Meg73S6kFm/4PpbYdq35yYWoCZ9mS/YSx+lKnmiohz4=

containers/devicemanagerb/main.go

@@ -2,46 +2,26 @@ package main
 
 import (
 	"bytes"
+	"devicemanagerb/constants"
 	"devicemanagerb/router"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
-	"net"
 	"net/http"
-	"os"
-	"strings"
 )
 
-var server_addr string
-
-func getIP() string {
-	host, _ := os.Hostname()
-	addrs, _ := net.LookupIP(host)
-
-	return addrs[0].String()
-}
 func registerToServer() {
-	var exist bool
-	server_addr, exist = os.LookupEnv("SERVER_ADDR")
-	if !exist {
-		fmt.Println("Please set SERVER_ADDR as environment variable")
-	}
-
-	ip := getIP()
-	idx := strings.LastIndex(ip, ".")
-	serverAddr := ip[:idx+1] + "1"
-	fmt.Println(serverAddr)
 
 	var obj map[string]string = make(map[string]string)
 	obj["name"] = "devicemanagerb"
-	obj["addr"] = getIP() + ":3000"
+	obj["addr"] = constants.MyIP + ":3000"
 
 	b, err := json.Marshal(obj)
 	if err != nil {
 		panic(err)
 	}
 
-	req, err := http.NewRequest("PUT", "http://"+serverAddr+":3000/services", bytes.NewBuffer(b))
+	req, err := http.NewRequest("PUT", "http://"+constants.ServerAddr+":3000/services", bytes.NewBuffer(b))
 	if err != nil {
 		panic(err)
 	}
@@ -56,7 +36,6 @@ func registerToServer() {
 		panic(err)
 	}
 	fmt.Println(string(b))
-	// http.Post("")
 }
 
 func main() {

containers/devicemanagerb/router/route.go

@@ -1,15 +1,150 @@
 package router
 
 import (
+	"bytes"
+	"devicemanagerb/constants"
+	"encoding/json"
+	"io/ioutil"
+	"log"
 	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/urfave/negroni"
 )
 
 func NewRouter() http.Handler {
-	mux := http.NewServeMux()
+	mux := mux.NewRouter()
-	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	// mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
+	// 	w.WriteHeader(http.StatusOK)
-		w.Write([]byte("I am devicemanagerB"))
+	// 	w.Write([]byte("I am devicemanagerB"))
-	})
+	// })
 
-	return mux
+	mux.HandleFunc("/{id}", PutStatusChangedHandle).Methods("PUT")
+	mux.HandleFunc("/{id}", PostStatusChangedHandle).Methods("POST")
+	mux.HandleFunc("/{id}", GetStatusHandle).Methods("GET")
+
+	n := negroni.Classic()
+	n.UseHandler(mux)
+	return n
 }
+
+// sensing data per device
+var s_data = map[string]interface{}{}
+
+// status from sensor
+func PutStatusChangedHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	b, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	status := map[string]interface{}{}
+	err = json.Unmarshal(b, &status)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	s_data[did] = status
+	log.Println(s_data)
+
+	cdata, ok := c_data[did]
+	if !ok {
+		w.Write([]byte("I am devicemanagerB"))
+	} else {
+		encoder := json.NewEncoder(w)
+		err := encoder.Encode(cdata)
+		if err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			w.Write([]byte(err.Error()))
+			return
+		}
+	}
+
+	req, err := http.NewRequest("PUT", "http://"+constants.ServerAddr+":3000/device/"+did, bytes.NewReader(b))
+	if err != nil {
+		return
+	}
+
+	_, err = http.DefaultClient.Do(req)
+	if err != nil {
+		panic(err)
+	}
+
+}
+
+var c_data = map[string]interface{}{}
+
+func GetStatusHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	status, ok := c_data[did]
+	if !ok {
+		status = map[string]interface{}{
+			"servo": 0,
+			"fan":   0,
+			"light": 0,
+		}
+	}
+
+	encoder := json.NewEncoder(w)
+
+	err := encoder.Encode(status)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+}
+
+func PostStatusChangedHandle(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+
+	b, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	status := map[string]interface{}{}
+	err = json.Unmarshal(b, &status)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	c_data[did] = status
+	log.Println(c_data)
+
+	w.WriteHeader(http.StatusOK)
+}
+
+// status from user per device

init.sh

@@ -1 +1,3 @@
-rm -r dump.db eth.pcap lo.pcap
+rm -r *.db 
+docker container stop $(docker container ls -q)
+docker container prune

model/controller.go

@@ -55,10 +55,5 @@ func (s *dbHandler) IsExistController(cid string) bool {
 
 	result := s.db.First(&controller, "cid=?", cid)
 
-	if result.Error != nil {
+	return result.Error == nil
-		fmt.Println(result.Error)
-		return false
-	}
-
-	return true
 }

model/device.go

@@ -41,3 +41,32 @@ func (s *dbHandler) AddDevice(device *Device) error {
 	return nil
 
 }
+
+func (s *dbHandler) QueryDevice(dname string) (*Device, error) {
+	var device Device
+	tx := s.db.First(&device, "dname=?", dname)
+
+	if tx.Error != nil {
+		return nil, tx.Error
+	}
+
+	return &device, nil
+}
+
+func (s *dbHandler) DeleteDevice(device *Device) error {
+	tx := s.db.Delete(device)
+	if tx.Error != nil {
+		return tx.Error
+	}
+
+	// tx.First(device, "did=?", device.DID)
+	return nil
+}
+
+func (s *dbHandler) IsExistDevice(dname string) bool {
+	var device = Device{}
+
+	result := s.db.First(&device, "dname=?", dname)
+
+	return result.Error != nil
+}

model/interface.go

@@ -16,6 +16,9 @@ import (
 type DBHandler interface {
 	GetDevices() ([]*Device, int, error)
 	AddDevice(d *Device) error
+	QueryDevice(dname string) (*Device, error)
+	DeleteDevice(device *Device) error
+	IsExistDevice(dname string) bool
 	AddController(r io.Reader) (*Controller, error)
 	GetControllers() ([]*Controller, error)
 	IsExistController(cid string) bool

model/service.go

@@ -1,6 +1,8 @@
 package model
 
 import (
+	"errors"
+
 	"github.com/google/uuid"
 	"gorm.io/gorm"
 )
@@ -77,6 +79,9 @@ func (s *dbHandler) GetSID(name string) (string, error) {
 		return "", tx.Error
 	}
 
+	if len(service.SID) == 0 {
+		return "", errors.New("not installed service")
+	}
 	return service.SID, nil
 }
 

public-ws/index.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+
+<html>
+
+<head>
+  <title>Web socket sample</title>
+  <script src="./index.js"></script>
+</head>
+
+<body>
+  <div>hello</div>
+</body>
+
+</html>

public-ws/index.js

@@ -0,0 +1,25 @@
+window.onload = () => {
+  if (!window.WebSocket) {
+    alert("No WebSocket!");
+    return;
+  }
+  function connect() {
+    let ws = new WebSocket(`ws://${window.location.host}/device/73531420-ae8c-47be-9eff-308d946f3a65`);
+    ws.onopen = (e) => {
+      console.log("onopen", arguments);
+    }
+
+    ws.onclose = () => {
+      console.log("onclose", arguments);
+    }
+
+    ws.onmessage = function (e) {
+      console.log(e.data);
+      // addMessage(JSON.parse(e.data));
+      console.log(JSON.parse(e.data));
+    }
+    return ws;
+  }
+
+  ws = connect();
+}

router/controller.go

@@ -0,0 +1,50 @@
+package router
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+func GetControllerList(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+	list, err := db.GetControllers()
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+	fmt.Println(list)
+	encoder := json.NewEncoder(w)
+
+	err = encoder.Encode(list)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+}
+
+func PostController(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+
+	controller, err := db.AddController(r.Body)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+	w.WriteHeader(http.StatusCreated)
+	encoder := json.NewEncoder(w)
+	err = encoder.Encode(controller)
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	sendNotification(&Notification{Msg: "Added Controller"})
+}

router/devices.go

@@ -0,0 +1,243 @@
+package router
+
+import (
+	"encoding/json"
+	"etrismartfarmpoc/model"
+	"etrismartfarmpoc/watcher"
+	"fmt"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/gorilla/mux"
+)
+
+var waitPermission = map[string]chan bool{}
+var mutex sync.Mutex
+var discoveredDevices = []*model.Device{}
+
+func GetDiscoveredDevices(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+
+	encoder := json.NewEncoder(w)
+	encoder.Encode(discoveredDevices)
+}
+
+func removeDevice(device *model.Device) {
+	for i, e := range discoveredDevices {
+		if e == device {
+			discoveredDevices[i] = discoveredDevices[len(discoveredDevices)-1]
+			discoveredDevices = discoveredDevices[:len(discoveredDevices)-1]
+		}
+	}
+}
+
+func GetDevices(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+
+	devices, _, err := db.GetDevices()
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	encoder := json.NewEncoder(w)
+	encoder.Encode(devices)
+}
+
+// PostDevice : Handle for Receiving discovery message
+func PostDevice(w http.ResponseWriter, r *http.Request) {
+	var device = &model.Device{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(device)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	// 등록된 제어기로 부터 전송된 요청 메시지임을 확인
+	if !db.IsExistController(device.CID) {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("Wrong Controller ID"))
+		return
+	}
+
+	if !db.IsExistDevice(device.DName) {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("Already exist device"))
+		return
+	}
+
+	// 장치 ID 생성 및 탐색된 장치 추가
+	device.DID = uuid.NewString()
+	mutex.Lock()
+	waitPermission[device.DID] = make(chan bool)
+	discoveredDevices = append(discoveredDevices, device)
+
+	// 관리자에게 탐색을 알림
+	sendNotification(&Notification{Msg: "Add discovered device"})
+	mutex.Unlock()
+
+	timer := time.NewTimer(20 * time.Second)
+
+	select {
+	case <-r.Context().Done():
+		mutex.Lock()
+		defer mutex.Unlock()
+		delete(waitPermission, device.DID)
+		removeDevice(device)
+		sendNotification(&Notification{Msg: "Remove discovered device"})
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("This operation is not permitted"))
+		return
+	case <-timer.C:
+		mutex.Lock()
+		defer mutex.Unlock()
+		delete(waitPermission, device.DID)
+		removeDevice(device)
+		sendNotification(&Notification{Msg: "Remove discovered device"})
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("This operation is not permitted"))
+		return
+	case b, ok := <-waitPermission[device.DID]:
+		if !ok {
+			return
+		}
+
+		if b {
+			// 디바이스 등록 절차 수행
+			db.AddDevice(device)
+			db.AddService(device.SName)
+
+			// 디바이스 등록 알림
+			w.WriteHeader(http.StatusCreated)
+			json.NewEncoder(w).Encode(device)
+			sendNotification(&Notification{Msg: "Added Device"})
+			mutex.Lock()
+			defer mutex.Unlock()
+			delete(waitPermission, device.DID)
+			removeDevice(device)
+			sendNotification(&Notification{Msg: "Add device"})
+		} else {
+			mutex.Lock()
+			defer mutex.Unlock()
+			delete(waitPermission, device.DID)
+			removeDevice(device)
+			sendNotification(&Notification{Msg: "Remove discovered device"})
+			w.WriteHeader(http.StatusOK)
+			w.Write([]byte("This operation is not permitted"))
+		}
+	}
+}
+
+func DeleteDevice(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+	msg := map[string]string{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&msg)
+
+	device, err := db.QueryDevice(msg["dname"])
+	db.DeleteDevice(device)
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+	}
+
+	sendNotification(&Notification{Msg: "Delete device"})
+	w.WriteHeader(http.StatusOK)
+}
+
+func PutDevice(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+	msg := map[string]string{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&msg)
+
+	fmt.Println("msg[did]: ", msg["did"])
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+	}
+
+	ch, ok := waitPermission[msg["did"]]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("Wrong Device ID is Sended"))
+		return
+	}
+	ch <- true
+	w.WriteHeader(http.StatusOK)
+}
+
+// 값 변경 알림
+func PutDeviceStatus(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("not found did"))
+		return
+	}
+
+	if r.ContentLength == 0 {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	watch, ok := watchers[did]
+	if !ok {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	param := map[string]interface{}{}
+	decoder := json.NewDecoder(r.Body)
+
+	err := decoder.Decode(&param)
+	if err != nil {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	watch.Notify(watcher.NewStateChangedEvent(nil, param))
+	w.WriteHeader(http.StatusOK)
+}
+
+// func PostDeviceStatus(w http.ResponseWriter, r *http.Request) {
+// 	vars := mux.Vars(r)
+// 	did, ok := vars["id"]
+// 	if !ok {
+// 		w.WriteHeader(http.StatusBadRequest)
+// 		w.Write([]byte("not found did"))
+// 		return
+// 	}
+
+// 	if r.ContentLength == 0 {
+// 		w.WriteHeader(http.StatusOK)
+// 		return
+// 	}
+
+// 	watch, ok := watchers[did]
+// 	if !ok {
+// 		w.WriteHeader(http.StatusOK)
+// 		return
+// 	}
+
+// 	param := map[string]interface{}{}
+// 	decoder := json.NewDecoder(r.Body)
+
+// 	err := decoder.Decode(&param)
+// 	if err != nil {
+// 		w.WriteHeader(http.StatusOK)
+// 		return
+// 	}
+
+// 	watch.Notify(watcher.NewStateChangedEvent(nil, param))
+// }

router/notification.go

@@ -0,0 +1,143 @@
+package router
+
+import (
+	"etrismartfarmpoc/watcher"
+	"fmt"
+	"log"
+	"net/http"
+	"sync"
+
+	"github.com/gorilla/mux"
+	"github.com/gorilla/websocket"
+)
+
+var upgrader = websocket.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 1024,
+	CheckOrigin:     func(r *http.Request) bool { return true },
+}
+
+var notifications []chan *Notification
+var notiMutex sync.Mutex
+
+func sendNotification(noti *Notification) {
+	// notiMutex.Lock()
+	// defer notiMutex.Unlock()
+	for _, ch := range notifications {
+		ch <- noti
+	}
+}
+
+func removeNotification(noti chan *Notification) {
+	notiMutex.Lock()
+	defer notiMutex.Unlock()
+	for i, e := range notifications {
+		if e == noti {
+			notifications[i] = notifications[len(notifications)-1]
+			notifications = notifications[:len(notifications)-1]
+		}
+	}
+}
+
+func GetNotification(w http.ResponseWriter, r *http.Request) {
+	notiChan := make(chan *Notification, 1)
+	notiMutex.Lock()
+	notifications = append(notifications, notiChan)
+	notiMutex.Unlock()
+	conn, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	for {
+		notification := <-notiChan
+		// fmt.Println("Write!!", discoveredDevices)
+		if conn.WriteJSON(notification) != nil {
+			log.Println(err)
+			w.WriteHeader(http.StatusBadRequest)
+			removeNotification(notiChan)
+			notiChan = nil
+			return
+		}
+	}
+}
+
+var watchers = map[string]*watcher.DeviceWatcher{}
+
+func GetDeviceWatch(w http.ResponseWriter, r *http.Request) {
+
+	vars := mux.Vars(r)
+	did, ok := vars["id"]
+	if !ok {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("not found did"))
+		return
+	}
+
+	conn, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	if !checkDid(did) {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte("not exist did"))
+		return
+	}
+
+	s := make(chan map[string]interface{})
+	defer close(s)
+	ec := make(chan error)
+	defer close(ec)
+
+	watch, ok := watchers[did]
+
+	if !ok {
+		watch = &watcher.DeviceWatcher{}
+		watchers[did] = watch
+	}
+
+	watch.Subscribe(s)
+
+	defer func() {
+		cnt := watch.Desubscribe(s)
+		if cnt == 0 {
+			delete(watchers, did)
+			log.Println("delete watchers: ", watchers)
+		}
+	}()
+
+	go func() {
+		_, _, err := conn.ReadMessage()
+		if err != nil {
+			ec <- err
+		}
+	}()
+	for {
+		select {
+		case param := <-s:
+			if conn.WriteJSON(param) != nil {
+				log.Println(err)
+				w.WriteHeader(http.StatusBadRequest)
+				return
+			}
+
+		case <-r.Context().Done():
+			fmt.Println("see you later~")
+			w.WriteHeader(http.StatusOK)
+			w.Write([]byte("See you later~"))
+			return
+		case <-ec:
+			return
+		}
+
+	}
+}
+
+func checkDid(did string) bool {
+	return true
+}

router/route.go

@@ -2,24 +2,16 @@ package router
 
 import (
 	"encoding/json"
-	"etrismartfarmpoc/containermgmt"
 	"etrismartfarmpoc/model"
-	"fmt"
-	"io"
-	"log"
 	"net/http"
 	"strings"
-	"sync"
-	"time"
 
-	"github.com/google/uuid"
 	"github.com/gorilla/mux"
-	"github.com/gorilla/websocket"
 	"github.com/urfave/negroni"
 )
 
 type Notification struct {
-	Msg string `json:msg`
+	Msg string `json:"msg"`
 }
 
 var db model.DBHandler
@@ -43,7 +35,10 @@ func NewRouter() http.Handler {
 	mux.HandleFunc("/services", PutServices).Methods("PUT")
 	mux.HandleFunc("/devices", PostDevice).Methods("POST")
 	mux.HandleFunc("/devices", GetDevices).Methods("GET")
+	mux.HandleFunc("/devices", DeleteDevice).Methods("DELETE")
 	mux.HandleFunc("/devices", PutDevice).Methods("PUT", "OPTIONS")
+	mux.HandleFunc("/device/{id}", GetDeviceWatch).Methods("GET")
+	mux.HandleFunc("/device/{id}", PutDeviceStatus).Methods("PUT")
 	mux.HandleFunc("/discover", GetDiscoveredDevices).Methods("GET")
 	mux.PathPrefix("/services/").HandlerFunc(RouteRequestToService)
 
@@ -70,115 +65,6 @@ func EchoRoute(w http.ResponseWriter, r *http.Request) {
 	encoder.Encode(m)
 }
 
-func GetControllerList(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-	list, err := db.GetControllers()
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-	fmt.Println(list)
-	encoder := json.NewEncoder(w)
-
-	err = encoder.Encode(list)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-}
-
-func PostController(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-
-	controller, err := db.AddController(r.Body)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-	w.WriteHeader(http.StatusCreated)
-	encoder := json.NewEncoder(w)
-	err = encoder.Encode(controller)
-
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-
-	sendNotification(&Notification{Msg: "Added Controller"})
-}
-
-var upgrader = websocket.Upgrader{
-	ReadBufferSize:  1024,
-	WriteBufferSize: 1024,
-	CheckOrigin:     func(r *http.Request) bool { return true },
-}
-
-var notifications []chan *Notification
-var notiMutex sync.Mutex
-
-func sendNotification(noti *Notification) {
-	// notiMutex.Lock()
-	// defer notiMutex.Unlock()
-	for _, ch := range notifications {
-		ch <- noti
-	}
-}
-
-func removeNotification(noti chan *Notification) {
-	notiMutex.Lock()
-	defer notiMutex.Unlock()
-	for i, e := range notifications {
-		if e == noti {
-			discoveredDevices[i] = discoveredDevices[len(discoveredDevices)-1]
-			discoveredDevices = discoveredDevices[:len(discoveredDevices)-1]
-		}
-	}
-}
-func GetNotification(w http.ResponseWriter, r *http.Request) {
-	notiChan := make(chan *Notification, 1)
-	notiMutex.Lock()
-	notifications = append(notifications, notiChan)
-	notiMutex.Unlock()
-	conn, err := upgrader.Upgrade(w, r, nil)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-
-	for {
-		notification := <-notiChan
-		// fmt.Println("Write!!", discoveredDevices)
-		if conn.WriteJSON(notification) != nil {
-			log.Println(err)
-			w.WriteHeader(http.StatusBadRequest)
-			removeNotification(notiChan)
-			notiChan = nil
-			return
-		}
-	}
-}
-
-func GetDiscoveredDevices(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-	devices, _, err := db.GetDevices()
-
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	encoder := json.NewEncoder(w)
-	encoder.Encode(devices)
-}
-
 // func GetDiscoveredDevices(w http.ResponseWriter, r *http.Request) {
 // 	noti := make(chan string, 1)
 // 	mutex.Lock()
@@ -201,279 +87,6 @@ func GetDiscoveredDevices(w http.ResponseWriter, r *http.Request) {
 // 	}
 // }
 
-var waitPermission = map[string]chan bool{}
-var mutex sync.Mutex
-var discoveredDevices []*model.Device
-var discoveredNotifications []chan string
-
-func removeDevice(device *model.Device) {
-	for i, e := range discoveredDevices {
-		if e == device {
-			discoveredDevices[i] = discoveredDevices[len(discoveredDevices)-1]
-			discoveredDevices = discoveredDevices[:len(discoveredDevices)-1]
-		}
-	}
-}
-
-func GetDevices(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-	devices, _, err := db.GetDevices()
-
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	encoder := json.NewEncoder(w)
-	encoder.Encode(devices)
-}
-
-// PostDevice : Handle for Receiving discovery message
-func PostDevice(w http.ResponseWriter, r *http.Request) {
-	var device = &model.Device{}
-	decoder := json.NewDecoder(r.Body)
-	err := decoder.Decode(device)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	// 등록된 제어기로 부터 전송된 요청 메시지임을 확인
-	if !db.IsExistController(device.CID) {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte("Wrong Controller ID"))
-		return
-	}
-
-	// 장치 ID 생성 및 탐색된 장치 추가
-	device.DID = uuid.NewString()
-	mutex.Lock()
-	waitPermission[device.DID] = make(chan bool)
-	discoveredDevices = append(discoveredDevices, device)
-
-	// 관리자에게 탐색을 알림
-	for _, noti := range discoveredNotifications {
-		noti <- device.DID
-	}
-	mutex.Unlock()
-
-	timer := time.NewTimer(20 * time.Second)
-	select {
-	case <-r.Context().Done():
-		fmt.Println("Done!!")
-		mutex.Lock()
-		defer mutex.Unlock()
-		delete(waitPermission, device.DID)
-		removeDevice(device)
-
-		for _, noti := range discoveredNotifications {
-			noti <- device.DID
-		}
-		w.WriteHeader(http.StatusOK)
-		w.Write([]byte("This operation is not permitted"))
-		return
-	case <-timer.C:
-		mutex.Lock()
-		defer mutex.Unlock()
-		delete(waitPermission, device.DID)
-		removeDevice(device)
-
-		for _, noti := range discoveredNotifications {
-			noti <- device.DID
-		}
-		w.WriteHeader(http.StatusOK)
-		w.Write([]byte("This operation is not permitted"))
-		return
-	case b := <-waitPermission[device.DID]:
-		if b {
-			// 디바이스 등록 절차 수행
-			db.AddDevice(device)
-			db.AddService(device.SName)
-
-			// 디바이스 등록 알림
-			w.WriteHeader(http.StatusCreated)
-			json.NewEncoder(w).Encode(device)
-			sendNotification(&Notification{Msg: "Added Device"})
-			mutex.Lock()
-			defer mutex.Unlock()
-			delete(waitPermission, device.DID)
-			removeDevice(device)
-
-			for _, noti := range discoveredNotifications {
-				noti <- device.DID
-			}
-		} else {
-			mutex.Lock()
-			defer mutex.Unlock()
-			delete(waitPermission, device.DID)
-			removeDevice(device)
-
-			for _, noti := range discoveredNotifications {
-				noti <- device.DID
-			}
-			w.WriteHeader(http.StatusOK)
-			w.Write([]byte("This operation is not permitted"))
-		}
-	}
-}
-
-func PutDevice(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-	msg := map[string]string{}
-	decoder := json.NewDecoder(r.Body)
-	err := decoder.Decode(&msg)
-
-	fmt.Println("msg[did]: ", msg["did"])
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-	}
-
-	ch, ok := waitPermission[msg["did"]]
-	if !ok {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte("Wrong Device ID is Sended"))
-		return
-	}
-	ch <- true
-	w.WriteHeader(http.StatusOK)
-}
-
-func GetServices(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Access-Control-Allow-Origin", "*")
-	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
-
-	if r.ContentLength != 0 {
-		obj := map[string]string{}
-		err := json.NewDecoder(r.Body).Decode(&obj)
-		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-
-		sid, err := db.GetSID(obj["sname"])
-		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
-			return
-		}
-		w.Write([]byte(sid))
-		return
-	}
-
-	l, err := db.GetServices()
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	err = json.NewEncoder(w).Encode(l)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-}
-
-func PutServices(w http.ResponseWriter, r *http.Request) {
-	var obj = map[string]string{}
-
-	decoder := json.NewDecoder(r.Body)
-	err := decoder.Decode(&obj)
-
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	s, err := db.UpdateService(obj["name"], obj["addr"])
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-
-	sendNotification(&Notification{Msg: "Update Service"})
-	err = json.NewEncoder(w).Encode(s)
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		return
-	}
-}
-
-// func GetServiceList(w http.ResponseWriter, r *http.Request) {
-// 	result := containermgmt.GetContainers(context.Background())
-// 	b := result.Value(containermgmt.ReturnKey).([]byte)
-// 	w.Write(b)
-// }
-
-func PostService(w http.ResponseWriter, r *http.Request) {
-
-	var obj = map[string]string{}
-	decoder := json.NewDecoder(r.Body)
-	err := decoder.Decode(&obj)
-
-	db.IsExistService(obj["name"])
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-
-	err = containermgmt.CreateContainer(obj["name"])
-	if err != nil {
-		w.WriteHeader(http.StatusBadRequest)
-		w.Write([]byte(err.Error()))
-		return
-	}
-
-	w.WriteHeader(http.StatusCreated)
-}
-
-func RouteRequestToService(w http.ResponseWriter, r *http.Request) {
-	l := len([]rune("/services/"))
-	var id string
-	var url string
-	idx := strings.Index(r.RequestURI[l:], "/")
-	if idx == -1 {
-		id = r.RequestURI[l:]
-		url = "/"
-	} else {
-		id = r.RequestURI[l : l+idx]
-		if len([]rune(r.RequestURI)) <= l+idx {
-			url = "/"
-		} else {
-			url = r.RequestURI[l+idx:]
-		}
-	}
-
-	// w.Write([]byte(vars["url"]))
-	host, err := db.GetAddr(id)
-	if err != nil {
-		w.WriteHeader(http.StatusNotFound)
-		return
-	}
-
-	log.Println("Route to", host+"/"+url)
-	req, err := http.NewRequest(r.Method, "http://"+host+"/"+url, r.Body)
-	if err != nil {
-		// 잘못된 메시지 포맷이 전달된 경우
-		w.WriteHeader(http.StatusBadRequest)
-		fmt.Fprint(w, err)
-		return
-	}
-
-	resp, err := http.DefaultClient.Do(req)
-
-	if err != nil {
-		// 잘못된 메시지 포맷이 전달된 경우
-		w.WriteHeader(http.StatusBadRequest)
-		fmt.Fprint(w, err)
-		return
-	}
-
-	io.Copy(w, resp.Body)
-}
-
 // func mapService(urls []string) {
 
 // }

router/services.go

@@ -0,0 +1,139 @@
+package router
+
+import (
+	"encoding/json"
+	"etrismartfarmpoc/containermgmt"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"strings"
+)
+
+func GetServices(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+
+	sname := r.Header.Get("sname")
+
+	if len(sname) != 0 {
+		sid, err := db.GetSID(sname)
+		if err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		w.Write([]byte(sid))
+		return
+	}
+
+	l, err := db.GetServices()
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	err = json.NewEncoder(w).Encode(l)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+}
+
+func PutServices(w http.ResponseWriter, r *http.Request) {
+	var obj = map[string]string{}
+
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&obj)
+
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	s, err := db.UpdateService(obj["name"], obj["addr"])
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	sendNotification(&Notification{Msg: "Update Service"})
+	err = json.NewEncoder(w).Encode(s)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		return
+	}
+}
+
+// func GetServiceList(w http.ResponseWriter, r *http.Request) {
+// 	result := containermgmt.GetContainers(context.Background())
+// 	b := result.Value(containermgmt.ReturnKey).([]byte)
+// 	w.Write(b)
+// }
+
+func PostService(w http.ResponseWriter, r *http.Request) {
+
+	var obj = map[string]string{}
+	decoder := json.NewDecoder(r.Body)
+	err := decoder.Decode(&obj)
+
+	db.IsExistService(obj["name"])
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	err = containermgmt.CreateContainer(obj["name"])
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	w.WriteHeader(http.StatusCreated)
+}
+
+func RouteRequestToService(w http.ResponseWriter, r *http.Request) {
+	l := len([]rune("/services/"))
+	var id string
+	var url string
+	idx := strings.Index(r.RequestURI[l:], "/")
+	if idx == -1 {
+		id = r.RequestURI[l:]
+		url = "/"
+	} else {
+		id = r.RequestURI[l : l+idx]
+		if len([]rune(r.RequestURI)) <= l+idx {
+			url = "/"
+		} else {
+			url = r.RequestURI[l+idx:]
+		}
+	}
+
+	// w.Write([]byte(vars["url"]))
+	host, err := db.GetAddr(id)
+	if err != nil {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	log.Println("Route to", host+url)
+	req, err := http.NewRequest(r.Method, "http://"+host+url, r.Body)
+	if err != nil {
+		// 잘못된 메시지 포맷이 전달된 경우
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprint(w, err)
+		return
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+
+	if err != nil {
+		// 잘못된 메시지 포맷이 전달된 경우
+		w.WriteHeader(http.StatusBadRequest)
+		fmt.Fprint(w, err)
+		return
+	}
+
+	io.Copy(w, resp.Body)
+}

watcher/cli.go

@@ -0,0 +1,5 @@
+package watcher
+
+func NewStateChangedEvent(t interface{}, param map[string]interface{}) *StatusChangedEvent {
+	return &StatusChangedEvent{t: t, param: param}
+}

watcher/device_watcher.go

@@ -0,0 +1,32 @@
+package watcher
+
+type DeviceWatcher struct {
+	// did            string
+	subscriber []chan map[string]interface{}
+}
+
+func (dw *DeviceWatcher) Notify(e Event) {
+	dw.onChanged(e)
+}
+
+func (dw *DeviceWatcher) onChanged(e Event) {
+	for _, s := range dw.subscriber {
+		s <- e.Param()
+	}
+}
+
+func (dw *DeviceWatcher) Subscribe(s chan map[string]interface{}) {
+	dw.subscriber = append(dw.subscriber, s)
+}
+
+func (dw *DeviceWatcher) Desubscribe(s chan map[string]interface{}) int {
+	length := len(dw.subscriber)
+	for i, e := range dw.subscriber {
+		if s == e {
+			dw.subscriber[i] = dw.subscriber[length-1]
+			dw.subscriber = dw.subscriber[:length-1]
+			return length - 1
+		}
+	}
+	return length
+}

watcher/interface.go

@@ -0,0 +1,13 @@
+package watcher
+
+type Watcher interface {
+}
+
+type Event interface {
+	Type() interface{}
+	Param() map[string]interface{}
+}
+
+type EventListener interface {
+	Handle(e Event)
+}

watcher/status_changed.go

@@ -0,0 +1,44 @@
+package watcher
+
+type StatusChangedEvent struct {
+	Event
+	t     interface{}
+	param map[string]interface{}
+}
+
+func (e *StatusChangedEvent) Type() interface{} {
+	return e.t
+}
+
+func (e *StatusChangedEvent) Param() map[string]interface{} {
+	return e.param
+}
+
+// type StatusChangedListener struct {
+// 	h func(e Event)
+// }
+
+// func (l *StatusChangedListener) Handle(e Event) {
+// 	if l.h != nil {
+// 		l.h(e)
+// 	}
+// }
+
+// func (l *StatusChangedListener) AddSubscriber(s chan map[string]interface{}) {
+// 	l.subscriber = append(l.subscriber, s)
+// }
+
+// func (l *StatusChangedListener) RemoveSubscriber(s chan map[string]interface{}) int {
+// 	length := len(l.subscriber)
+// 	for i, e := range l.subscriber {
+// 		if s == e {
+// 			l.subscriber[i] = l.subscriber[length-1]
+// 			l.subscriber = l.subscriber[:length-1]
+// 			return length - 1
+// 		}
+// 	}
+
+// 	return length
+// }
+
+// func (l *StatusChangedListener) onClose() {}