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How to use Selector method of websocket Package

Best Testkube code snippet using websocket.Selector

watch_test.go

Source:watch_test.go

...356	table := []struct {357		path            string358		rawQuery        string359		resourceVersion string360		labelSelector   string361		fieldSelector   string362		namespace       string363	}{364		{365			path:            rootPath,366			rawQuery:        "resourceVersion=1234",367			resourceVersion: "1234",368			labelSelector:   "",369			fieldSelector:   "",370			namespace:       metav1.NamespaceAll,371		}, {372			path:            rootPath,373			rawQuery:        "resourceVersion=314159&fieldSelector=Host%3D&labelSelector=name%3Dfoo",374			resourceVersion: "314159",375			labelSelector:   "name=foo",376			fieldSelector:   "Host=",377			namespace:       metav1.NamespaceAll,378		}, {379			path:            rootPath,380			rawQuery:        "fieldSelector=id%3dfoo&resourceVersion=1492",381			resourceVersion: "1492",382			labelSelector:   "",383			fieldSelector:   "id=foo",384			namespace:       metav1.NamespaceAll,385		}, {386			path:            rootPath,387			rawQuery:        "",388			resourceVersion: "",389			labelSelector:   "",390			fieldSelector:   "",391			namespace:       metav1.NamespaceAll,392		},393		{394			path:            namespacedPath,395			rawQuery:        "resourceVersion=1234",396			resourceVersion: "1234",397			labelSelector:   "",398			fieldSelector:   "",399			namespace:       "other",400		}, {401			path:            namespacedPath,402			rawQuery:        "resourceVersion=314159&fieldSelector=Host%3D&labelSelector=name%3Dfoo",403			resourceVersion: "314159",404			labelSelector:   "name=foo",405			fieldSelector:   "Host=",406			namespace:       "other",407		}, {408			path:            namespacedPath,409			rawQuery:        "fieldSelector=id%3dfoo&resourceVersion=1492",410			resourceVersion: "1492",411			labelSelector:   "",412			fieldSelector:   "id=foo",413			namespace:       "other",414		}, {415			path:            namespacedPath,416			rawQuery:        "",417			resourceVersion: "",418			labelSelector:   "",419			fieldSelector:   "",420			namespace:       "other",421		},422	}423	for _, item := range table {424		simpleStorage.requestedLabelSelector = labels.Everything()425		simpleStorage.requestedFieldSelector = fields.Everything()426		simpleStorage.requestedResourceVersion = "5" // Prove this is set in all cases427		simpleStorage.requestedResourceNamespace = ""428		dest.Path = item.path429		dest.RawQuery = item.rawQuery430		resp, err := http.Get(dest.String())431		if err != nil {432			t.Errorf("%v: unexpected error: %v", item.rawQuery, err)433			continue434		}435		resp.Body.Close()436		if e, a := item.namespace, simpleStorage.requestedResourceNamespace; e != a {437			t.Errorf("%v: expected %v, got %v", item.rawQuery, e, a)438		}439		if e, a := item.resourceVersion, simpleStorage.requestedResourceVersion; e != a {440			t.Errorf("%v: expected %v, got %v", item.rawQuery, e, a)441		}442		if e, a := item.labelSelector, simpleStorage.requestedLabelSelector.String(); e != a {443			t.Errorf("%v: expected %v, got %v", item.rawQuery, e, a)444		}445		if e, a := item.fieldSelector, simpleStorage.requestedFieldSelector.String(); e != a {446			t.Errorf("%v: expected %v, got %v", item.rawQuery, e, a)447		}448	}449}450func TestWatchProtocolSelection(t *testing.T) {451	simpleStorage := &SimpleRESTStorage{}452	handler := handle(map[string]rest.Storage{"simples": simpleStorage})453	server := httptest.NewServer(handler)454	defer server.Close()455	defer server.CloseClientConnections()456	client := http.Client{}457	dest, _ := url.Parse(server.URL)458	dest.Path = "/" + prefix + "/" + testGroupVersion.Group + "/" + testGroupVersion.Version + "/watch/simples"459	dest.RawQuery = ""...

watcher.go

Source:watcher.go

...17func (h *ServiceHandler) watchHandler(req *restful.Request, resp *restful.Response) {18	resource := req.PathParameter("resource")19	namespace := req.PathParameter("namespace")20	name := req.PathParameter("name")21	fieldSelector := req.QueryParameter("fieldSelector")22	// TODO filter by labels23	// handle websocket24	if isWebSocketRequest(req.Request) {25		klog.Infof("it is websocket")26		websocket.Handler(func(ws *websocket.Conn) {27			h.handleWS(ws, resource, fieldSelector, namespace, name)28		}).ServeHTTP(resp.ResponseWriter, req.Request)29		return30	}31	if _, ok := h.ServerHandler[resource]; !ok {32		klog.Errorf("unsupport resource: %s in watch operation.", resource)33		resp.WriteError(http.StatusBadRequest, fmt.Errorf("unsupport resource in watch operation."))34		return35	}36	h.doChunkWatch(h.Ctx, resource, fieldSelector, namespace, name, resp)37}38func isWebSocketRequest(req *http.Request) bool {39	if !strings.EqualFold(req.Header.Get("Upgrade"), "websocket") {40		return false41	}42	return connectionUpgradeRegex.MatchString(strings.ToLower(req.Header.Get("Connection")))43}44func (h *ServiceHandler) handleWS(ws *websocket.Conn, resource, fieldSelector, namespace, name string) {45	if _, ok := h.ServerHandler[resource]; !ok {46		klog.Errorf("unsupport resource: %s in watch operation.", resource)47		ws.Close()48		return49	}50	h.doWebsocketWatch(h.Ctx, resource, fieldSelector, namespace, name, ws)51}52func (h *ServiceHandler) doChunkWatch(ctx *HandlerContext, objType, fieldSelector, namespace, name string, resp *restful.Response) {53	w := resp.ResponseWriter54	flusher, ok := w.(http.Flusher)55	if !ok {56		klog.Errorf("failed to get flush")57		resp.WriteError(http.StatusInternalServerError, fmt.Errorf("failed to get flush"))58		return59	}60	w.Header().Set("Content-Type", "application/json")61	w.Header().Set("Transfer-Encoding", "chunked")62	w.WriteHeader(http.StatusOK)63	flusher.Flush()64	// send the init watch event65	watchEventList := h.ServerHandler[objType].GetInitWatchEvent(fieldSelector, namespace, name)66	for _, event := range watchEventList {67		data, err := json.Marshal(event)68		if err != nil {69			klog.Errorf("json marshal watch event failed: %v", err)70			continue71		}72		fmt.Fprintf(w, "%s\n", string(data))73	}74	flusher.Flush()75	// set watch channel76	newChan := make(chan metav1.WatchEvent)77	key := util.GetUniqueId()78	ctx.EdgeSubscriber.Add(objType, key, newChan)79	isConnected := true80	for isConnected {81		select {82		case event := <-newChan:83			// check if this event is needed84			if !checkIsNeedToWatch(objType, fieldSelector, namespace, name, event.Object.Object) {85				klog.V(5).Infof("fieldSelector %s don't match %s-%s-%s", fieldSelector, objType, namespace, name)86				break87			}88			data, err := json.Marshal(event)89			if err != nil {90				klog.Errorf("get watch event failed: %v", err)91				continue92			}93			fmt.Fprintf(w, "%s\n", string(data))94			if len(newChan) == 0 {95				flusher.Flush()96			}97		case <-w.(http.CloseNotifier).CloseNotify():98			klog.Infof("watch %s-%s-%s connection closed", objType, namespace, name)99			isConnected = false100		}101	}102	ctx.EdgeSubscriber.Delete(objType, key)103}104func (h *ServiceHandler) doWebsocketWatch(ctx *HandlerContext, objType, fieldSelector, namespace, name string, ws *websocket.Conn) {105	// set watch channel106	newChan := make(chan metav1.WatchEvent)107	key := strconv.FormatInt(time.Now().Unix(), 10)108	ctx.EdgeSubscriber.Add(objType, key, newChan)109	// send the init watch event110	watchEventList := h.ServerHandler[objType].GetInitWatchEvent(fieldSelector, namespace, name)111	for _, event := range watchEventList {112		data, err := json.Marshal(event)113		if err != nil {114			klog.Errorf("json marshal watch event failed: %v", err)115			continue116		}117		if err := websocket.Message.Send(ws, data); err != nil {118			klog.Errorf("send message error:%v", err)119		}120	}121	isConnected := true122	for isConnected {123		select {124		case event := <-newChan:125			// check if this event is needed126			if !checkIsNeedToWatch(objType, fieldSelector, namespace, name, event.Object.Object) {127				klog.V(5).Infof("fieldSelector %s don't match %s-%s-%s", fieldSelector, objType, namespace, name)128				break129			}130			data, err := json.Marshal(event)131			if err != nil {132				klog.Errorf("get watch event failed: %v", err)133				continue134			}135			if err := websocket.Message.Send(ws, data); err != nil {136				klog.Errorf("send message error:%v", err)137				isConnected = false138			}139		}140	}141	ctx.EdgeSubscriber.Delete(objType, key)142}143func checkIsNeedToWatch(objType, fieldSelector, namespace, name string, obj runtime.Object) bool {144	var getNodeName string145	resource := reflect.ValueOf(obj).Elem()146	getNamespace := resource.FieldByName("ObjectMeta").FieldByName("Namespace")147	getName := resource.FieldByName("ObjectMeta").FieldByName("Name")148	if objType == util.ResourcePod {149		getNodeName = resource.FieldByName("Spec").FieldByName("NodeName").String()150	}151	// when k3s agent watches kubernetes endpoint, edgehub is no need to send the changed endpoint.152	if fieldSelector == "metadata.name=kubernetes" && objType == util.ResourceEndpoint {153		return false154	}155	// check if the resource is the watching one by the query params, if not, then it is no need to watch it.156	if !IsFilterFromQueryParams(fieldSelector, getNodeName, getName.String()) {157		return false158	}159	switch objType {160	case util.ResourceNode:161		if name != "" && getName.String() != name {162			return false163		}164	default:165		if (namespace != "" && getNamespace.String() != namespace) || (name != "" && getName.String() != name) {166			return false167		}168	}169	return true170}...

listener.go

Source:listener.go

...24}25func (l *WebsocketListener) Name() string {26	return common.ListenerName("websocket.all-events")27}28func (l *WebsocketListener) Selector() string {29	return l.selector30}31func (l *WebsocketListener) Events() []testkube.EventType {32	return l.events33}34func (l *WebsocketListener) Metadata() map[string]string {35	ids := "["36	for _, w := range l.Websockets {37		ids += w.Id + " "38	}39	ids += "]"40	return map[string]string{41		"name":     l.Name(),42		"selector": l.Selector(),43		"clients":  ids,44	}45}46func (l *WebsocketListener) Notify(event testkube.Event) (result testkube.EventResult) {47	var success, failed []string48	for _, w := range l.Websockets {49		l.Log.Infow("notifying websocket", "id", w.Id, "event", event.Type)50		err := w.Conn.WriteJSON(event)51		if err != nil {52			failed = append(failed, w.Id)53		} else {54			success = append(success, w.Id)55		}56	}...

Selector

Using AI Code Generation

1import (2var upgrader = websocket.Upgrader{3}4func main() {5    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {6        conn, err := upgrader.Upgrade(w, r, nil)7        if err != nil {8            log.Println(err)9        }10        for {11            messageType, p, err := conn.ReadMessage()12            if err != nil {13                log.Println(err)14            }15            fmt.Println(string(p))16            if err := conn.WriteMessage(messageType, p); err != nil {17                log.Println(err)18            }19        }20    })21    http.ListenAndServe(":8080", nil)22}23import (24var upgrader = websocket.Upgrader{25}26func main() {27    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {28        conn, err := upgrader.Upgrade(w, r, nil)29        if err != nil {30            log.Println(err)31        }32        for {33            messageType, p, err := conn.ReadMessage()34            if err != nil {35                log.Println(err)36            }37            fmt.Println(string(p))38            if err := conn.WriteMessage(messageType, p); err != nil {39                log.Println(err)40            }41        }42    })43    http.ListenAndServe(":8080", nil)44}45import (46var upgrader = websocket.Upgrader{47}48func main() {49    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {50        conn, err := upgrader.Upgrade(w, r, nil)

Selector

Using AI Code Generation

1import (2func main() {3	ws, err := websocket.Dial(url, "", origin)4	if err != nil {5		fmt.Println(err)6	}7	defer ws.Close()8	var msg = make([]byte, 512)9	if n, err = ws.Read(msg); err != nil {10		fmt.Println(err)11	}12	fmt.Printf("Received: %s.\n", msg[:n])13}14import (15func main() {16	ws, err := websocket.Dial(url, "", origin)17	if err != nil {18		fmt.Println(err)19	}20	defer ws.Close()21	var msg = make([]byte, 512)22	if n, err = ws.Read(msg); err != nil {23		fmt.Println(err)24	}25	fmt.Printf("Received: %s.\n", msg[:n])26}27import (28func main() {29	ws, err := websocket.Dial(url, "", origin)30	if err != nil {31		fmt.Println(err)32	}33	defer ws.Close()34	var msg = make([]byte, 512)35	if n, err = ws.Read(msg); err != nil {36		fmt.Println(err)37	}38	fmt.Printf("Received: %s.\n", msg[:n])39}40import (41func main() {42	ws, err := websocket.Dial(url, "", origin)43	if err != nil {44		fmt.Println(err)45	}46	defer ws.Close()

Selector

Using AI Code Generation

1func main() {2    if err != nil {3        log.Fatal("dial:", err)4    }5    defer c.Close()6    done := make(chan struct{})7    go func() {8        defer close(done)9        for {10            _, message, err := c.ReadMessage()11            if err != nil {12                log.Println("read:", err)13            }14            log.Printf("recv: %s", message)15        }16    }()17    ticker := time.NewTicker(time.Second)18    defer ticker.Stop()19    for {20        select {21            err := c.WriteMessage(websocket.TextMessage, []byte(t.String()))22            if err != nil {23                log.Println("write:", err)24            }25        }26    }27}

Selector

Using AI Code Generation

1import (2func main() {3	ws, err := websocket.Dial(url, "", origin)4	if err != nil {5		fmt.Println("Error in Dialing: ", err)6	}7	var msg = make([]byte, 512)8	if n, err = ws.Read(msg); err != nil {9		fmt.Println("Error in reading: ", err)10	}11	fmt.Printf("Received: %s.\n", msg[:n])12	fmt.Scanln(&reply)13	fmt.Println("Sending to server: ", reply)14	msg = []byte(reply)15	if _, err = ws.Write(msg); err != nil {16		fmt.Println("Error in writing: ", err)17	}18}19import (20func main() {21	ws, err := websocket.Dial(url, "", origin)22	if err != nil {23		fmt.Println("Error in Dialing: ", err)24	}25	var msg = make([]byte, 512)26	if n, err = ws.Read(msg); err != nil {27		fmt.Println("Error in reading: ", err)28	}29	fmt.Printf("Received: %s.\n", msg[:n])30	fmt.Scanln(&reply)31	fmt.Println("Sending to server: ", reply)32	msg = []byte(reply)33	if _, err = ws.Write(msg); err != nil {34		fmt.Println("Error in writing: ", err)35	}36}37import (38func main() {39	ws, err := websocket.Dial(url, "", origin)40	if err != nil {41		fmt.Println("Error in Dialing: ", err)42	}43	var msg = make([]byte, 512)44	if n, err = ws.Read(msg); err

Selector

Using AI Code Generation

1import (  2func EchoServer(ws *websocket.Conn) {  3    for {4        if err = websocket.Message.Receive(ws, &reply); err != nil {5            fmt.Println("Can't receive")6        }7        fmt.Println("Received back from client: " + reply)8        fmt.Println("Sending to client: " + msg)9        if err = websocket.Message.Send(ws, msg); err != nil {10            fmt.Println("Can't send")11        }12    }13}14func main() {  15    http.Handle("/echo", websocket.Handler(EchoServer))16    if err := http.ListenAndServe(":1234", nil); err != nil {17        log.Fatal("ListenAndServe:", err)18    }19}20net/http.(*conn).serve.func1(0xc0420b0000)  21panic(0x4b9e00, 0x6b8d70)  22golang.org/x/net/websocket.(*Conn).write(0x0, 0xc0420b4d80, 0x2, 0x2, 0x0, 0x0)  23golang.org/x/net/websocket.(*Conn).WriteJSON(0x0, 0x4c3a20, 0xc0420b4d80, 0x0, 0x0)  24golang.org/x/net/websocket.Message.Send(0x0, 0x4c3a20, 0xc0420b4d80,

Selector

Using AI Code Generation

1import (2func main() {3	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {4		ws, err := websocket.Upgrade(w, r, w.Header(), 1024, 1024)5		if _, ok := err.(websocket.HandshakeError); ok {6			http.Error(w, "Not a websocket handshake", 400)7		} else if err != nil {8		}9		fmt.Println("Connected")10	})11	http.ListenAndServe(":8080", nil)12}13import (14func main() {15	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {16		if err != nil {17			fmt.Println("Error: ", err)18		}19		fmt.Println("Connected")20	})21	http.ListenAndServe(":8080", nil)22}

Selector

Using AI Code Generation

1import (2func main() {3	fmt.Print("Enter URL: ")4	fmt.Scanln(&url)5	fmt.Print("Enter message: ")6	fmt.Scanln(&message)7	conn, _, err = websocket.DefaultDialer.Dial(url, nil)8	if err != nil {9		fmt.Println(err)10		os.Exit(1)11	}12	defer conn.Close()13	err = conn.WriteMessage(websocket.TextMessage, []byte(message))14	if err != nil {15		fmt.Println(err)16		os.Exit(1)17	}18	_, response, err = conn.ReadMessage()19	if err != nil {20		fmt.Println(err)21		os.Exit(1)22	}23	fmt.Println(string(response))24}

Selector

Using AI Code Generation

1import (2func main() {3    header := make(http.Header)4    dialer := websocket.Dialer{}5    conn, _, err := dialer.Dial(url, header)6    if err != nil {7        panic(err)8    }9    defer conn.Close()10    _, msg, err := conn.ReadMessage()11    if err != nil {12        panic(err)13    }14    fmt.Println("Message: ", string(msg))15    _, msg, err = conn.ReadMessage()16    if err != nil {17        panic(err)18    }19    fmt.Println("Message: ", string(msg))20    _, msg, err = conn.ReadMessage()21    if err != nil {22        panic(err)23    }24    fmt.Println("Message: ", string(msg))25    _, msg, err = conn.ReadMessage()26    if err != nil {27        panic(err)28    }29    fmt.Println("Message: ", string(msg))30    _, msg, err = conn.ReadMessage()31    if err != nil {32        panic(err)33    }34    fmt.Println("Message: ", string(msg))35    _, msg, err = conn.ReadMessage()36    if err != nil {37        panic(err)38    }39    fmt.Println("Message: ", string(msg))40    _, msg, err = conn.ReadMessage()41    if err != nil {42        panic(err)43    }44    fmt.Println("Message: ", string(msg))45    _, msg, err = conn.ReadMessage()46    if err != nil {47        panic(err)48    }49    fmt.Println("Message: ", string(msg))50    _, msg, err = conn.ReadMessage()51    if err != nil {52        panic(err)53    }54    fmt.Println("Message: ", string(msg))55    _, msg, err = conn.ReadMessage()56    if err != nil {57        panic(err)58    }59    fmt.Println("Message: ", string(msg))

Selector

Using AI Code Generation

1import (2func main() {3    doc := js.Global.Get("document")4    e := doc.Call("querySelector", "#test")5    fmt.Println(e)6}7import (8func main() {9    doc := js.Global.Get("document")10    e := doc.Call("querySelector", "#test")11    fmt.Println(e.Get("innerHTML"))12}13import (14func main() {15    doc := js.Global.Get("document")16    e := doc.Call("querySelector", "#test")17    e.Set("innerHTML", "Hello World")18}19import (20func main() {21    doc := js.Global.Get("document")22    e := doc.Call("querySelector", "#test")23    e.Set("innerHTML", "Hello World")24    fmt.Println(e.Get("innerHTML"))25}26import (27func main() {28    doc := js.Global.Get("document")29    e := doc.Call("querySelector", "#test")30    e.Set("innerHTML", "Hello World")31    fmt.Println(e.Get("innerHTML"))32    e.Set("innerHTML", "Hello World Again")

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