initwshrpc in electron (#391)

cmd/wsh/cmd/wshcmd-root.go

@@ -6,7 +6,6 @@ package cmd
 import (
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"regexp"
 	"runtime/debug"
@@ -177,7 +176,6 @@ func Execute() {
 	}()
 	err := rootCmd.Execute()
 	if err != nil {
-		log.Printf("[error] %v\n", err)
 		wshutil.DoShutdown("", 1, true)
 		return
 	}

cmd/wsh/cmd/wshcmd-web.go

@@ -4,12 +4,14 @@
 package cmd
 
 import (
+	"encoding/json"
 	"fmt"
 
 	"github.com/spf13/cobra"
 	"github.com/wavetermdev/waveterm/pkg/waveobj"
 	"github.com/wavetermdev/waveterm/pkg/wshrpc"
 	"github.com/wavetermdev/waveterm/pkg/wshrpc/wshclient"
+	"github.com/wavetermdev/waveterm/pkg/wshutil"
 )
 
 var webCmd = &cobra.Command{
@@ -26,15 +28,16 @@ var webOpenCmd = &cobra.Command{
 }
 
 var webGetCmd = &cobra.Command{
-	Use:    "get [--inner] [--all] css-selector",
+	Use:    "get [--inner] [--all] [--json] blockid css-selector",
 	Short:  "get the html for a css selector",
-	Args:   cobra.ExactArgs(1),
+	Args:   cobra.ExactArgs(2),
 	Hidden: true,
 	RunE:   webGetRun,
 }
 
 var webGetInner bool
 var webGetAll bool
+var webGetJson bool
 var webOpenMagnified bool
 
 func init() {
@@ -42,11 +45,59 @@ func init() {
 	webCmd.AddCommand(webOpenCmd)
 	webGetCmd.Flags().BoolVarP(&webGetInner, "inner", "", false, "get inner html (instead of outer)")
 	webGetCmd.Flags().BoolVarP(&webGetAll, "all", "", false, "get all matches (querySelectorAll)")
+	webGetCmd.Flags().BoolVarP(&webGetJson, "json", "", false, "output as json")
 	webCmd.AddCommand(webGetCmd)
 	rootCmd.AddCommand(webCmd)
 }
 
 func webGetRun(cmd *cobra.Command, args []string) error {
+	oref := args[0]
+	if oref == "" {
+		return fmt.Errorf("blockid not specified")
+	}
+	err := validateEasyORef(oref)
+	if err != nil {
+		return err
+	}
+	fullORef, err := resolveSimpleId(oref)
+	if err != nil {
+		return fmt.Errorf("resolving blockid: %w", err)
+	}
+	blockInfo, err := wshclient.BlockInfoCommand(RpcClient, fullORef.OID, nil)
+	if err != nil {
+		return fmt.Errorf("getting block info: %w", err)
+	}
+	if blockInfo.Meta.GetString(waveobj.MetaKey_View, "") != "web" {
+		return fmt.Errorf("block %s is not a web block", fullORef.OID)
+	}
+	data := wshrpc.CommandWebSelectorData{
+		WindowId: blockInfo.WindowId,
+		BlockId:  fullORef.OID,
+		TabId:    blockInfo.TabId,
+		Selector: args[1],
+		Opts: &wshrpc.WebSelectorOpts{
+			Inner: webGetInner,
+			All:   webGetAll,
+		},
+	}
+	output, err := wshclient.WebSelectorCommand(RpcClient, data, &wshrpc.RpcOpts{
+		Route:   wshutil.ElectronRoute,
+		Timeout: 5000,
+	})
+	if err != nil {
+		return err
+	}
+	if webGetJson {
+		barr, err := json.MarshalIndent(output, "", "  ")
+		if err != nil {
+			return fmt.Errorf("json encoding: %w", err)
+		}
+		WriteStdout("%s\n", string(barr))
+	} else {
+		for _, item := range output {
+			WriteStdout("%s\n", item)
+		}
+	}
 	return nil
 }
 

emain/emain-web.ts

@@ -3,11 +3,7 @@
 
 import { BrowserWindow, ipcMain, webContents, WebContents } from "electron";
 
-export async function getWebContentsByBlockId(
-    win: BrowserWindow,
-    tabId: string,
-    blockId: string
-): Promise<WebContents> {
+export function getWebContentsByBlockId(win: BrowserWindow, tabId: string, blockId: string): Promise<WebContents> {
     const prtn = new Promise<WebContents>((resolve, reject) => {
         const randId = Math.floor(Math.random() * 1000000000).toString();
         const respCh = `getWebContentsByBlockId-${randId}`;
@@ -46,18 +42,23 @@ export async function webGetSelector(wc: WebContents, selector: string, opts?: W
     if (!wc || !selector) {
         return null;
     }
-    try {
     const escapedSelector = escapeSelector(selector);
     const queryMethod = opts?.all ? "querySelectorAll" : "querySelector";
     const prop = opts?.inner ? "innerHTML" : "outerHTML";
     const execExpr = `
-            Array.from(document.${queryMethod}("${escapedSelector}") || []).map(el => el.${prop});
-        `;
-
-        const results = await wc.executeJavaScript(execExpr);
-        return results;
-    } catch (e) {
-        console.error("webGetSelector error", e);
-        return null;
+    (() => {
+        const toArr = x => (x instanceof NodeList) ? Array.from(x) : (x ? [x] : []);
+        try {
+            const result = document.${queryMethod}("${escapedSelector}");
+            const value = toArr(result).map(el => el.${prop});
+            return { value };
+        } catch (error) {
+            return { error: error.message };
         }
+    })()`;
+    const results = await wc.executeJavaScript(execExpr);
+    if (results.error) {
+        throw new Error(results.error);
+    }
+    return results.value;
 }

emain/emain-wsh.ts

@@ -0,0 +1,31 @@
+// Copyright 2024, Command Line Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import { RpcResponseHelper, WshClient } from "@/app/store/wshclient";
+import electron from "electron";
+import { getWebContentsByBlockId, webGetSelector } from "emain/emain-web";
+
+type WaveBrowserWindow = Electron.BrowserWindow & { waveWindowId: string; readyPromise: Promise<void> };
+
+export class ElectronWshClientType extends WshClient {
+    constructor() {
+        super("electron");
+    }
+
+    async handle_webselector(rh: RpcResponseHelper, data: CommandWebSelectorData): Promise<string[]> {
+        if (!data.tabid || !data.blockid || !data.windowid) {
+            throw new Error("tabid and blockid are required");
+        }
+        const windows = electron.BrowserWindow.getAllWindows();
+        const win = windows.find((w) => (w as WaveBrowserWindow).waveWindowId === data.windowid);
+        if (win == null) {
+            throw new Error(`no window found with id ${data.windowid}`);
+        }
+        const wc = await getWebContentsByBlockId(win, data.tabid, data.blockid);
+        if (wc == null) {
+            throw new Error(`no webcontents found with blockid ${data.blockid}`);
+        }
+        const rtn = await webGetSelector(wc, data.selector, data.opts);
+        return rtn;
+    }
+}

emain/emain.ts

@@ -1,7 +1,9 @@
 // Copyright 2024, Command Line Inc.
 // SPDX-License-Identifier: Apache-2.0
 
+import { initElectronWshrpc } from "@/app/store/wshrpcutil";
 import * as electron from "electron";
+import { ElectronWshClientType } from "emain/emain-wsh";
 import { FastAverageColor } from "fast-average-color";
 import fs from "fs";
 import * as child_process from "node:child_process";
@@ -33,6 +35,7 @@ import {
 } from "./platform";
 import { configureAutoUpdater, updater } from "./updater";
 
+let ElectronWshClient = new ElectronWshClientType();
 const electronApp = electron.app;
 let WaveVersion = "unknown"; // set by WAVESRV-ESTART
 let WaveBuildTime = 0; // set by WAVESRV-ESTART
@@ -857,6 +860,11 @@ async function appMain() {
     await relaunchBrowserWindows();
     await configureAutoUpdater();
     setTimeout(runActiveTimer, 5000); // start active timer, wait 5s just to be safe
+    try {
+        initElectronWshrpc(ElectronWshClient, AuthKey);
+    } catch (e) {
+        console.log("error initializing wshrpc", e);
+    }
 
     globalIsStarting = false;
 

frontend/app/store/ws.ts

@@ -3,10 +3,22 @@
 
 import debug from "debug";
 import { sprintf } from "sprintf-js";
+import type { WebSocket as ElectronWebSocketType } from "ws";
+
+let ElectronWebSocket: typeof ElectronWebSocketType;
+const AuthKeyHeader = "X-AuthKey";
+
+if (typeof window === "undefined") {
+    try {
+        const WebSocket = require("ws") as typeof ElectronWebSocketType;
+        ElectronWebSocket = WebSocket;
+    } catch (e) {}
+}
 
 const dlog = debug("wave:ws");
 
-const MaxWebSocketSendSize = 1024 * 1024; // 1MB
+const WarnWebSocketSendSize = 1024 * 1024; // 1MB
+const MaxWebSocketSendSize = 5 * 1024 * 1024; // 5MB
 const reconnectHandlers: (() => void)[] = [];
 
 function addWSReconnectHandler(handler: () => void) {
@@ -23,7 +35,7 @@ function removeWSReconnectHandler(handler: () => void) {
 type WSEventCallback = (arg0: WSEventType) => void;
 
 class WSControl {
-    wsConn: any;
+    wsConn: WebSocket | ElectronWebSocketType;
     open: boolean;
     opening: boolean = false;
     reconnectTimes: number = 0;
@@ -35,12 +47,14 @@ class WSControl {
     wsLog: string[] = [];
     baseHostPort: string;
     lastReconnectTime: number = 0;
+    authKey: string = null; // used only by electron
 
-    constructor(baseHostPort: string, windowId: string, messageCallback: WSEventCallback) {
+    constructor(baseHostPort: string, windowId: string, messageCallback: WSEventCallback, authKey?: string) {
         this.baseHostPort = baseHostPort;
         this.messageCallback = messageCallback;
         this.windowId = windowId;
         this.open = false;
+        this.authKey = authKey;
         setInterval(this.sendPing.bind(this), 5000);
     }
 
@@ -51,7 +65,13 @@ class WSControl {
         this.lastReconnectTime = Date.now();
         dlog("try reconnect:", desc);
         this.opening = true;
+        if (ElectronWebSocket) {
+            this.wsConn = new ElectronWebSocket(this.baseHostPort + "/ws?windowid=" + this.windowId, {
+                headers: { [AuthKeyHeader]: this.authKey },
+            });
+        } else {
             this.wsConn = new WebSocket(this.baseHostPort + "/ws?windowid=" + this.windowId);
+        }
         this.wsConn.onopen = this.onopen.bind(this);
         this.wsConn.onmessage = this.onmessage.bind(this);
         this.wsConn.onclose = this.onclose.bind(this);
@@ -172,6 +192,9 @@ class WSControl {
             console.log("ws message too large", byteSize, data.wscommand, msg.substring(0, 100));
             return;
         }
+        if (byteSize > WarnWebSocketSendSize) {
+            console.log("ws message large", byteSize, data.wscommand, msg.substring(0, 100));
+        }
         this.wsConn.send(msg);
     }
 

frontend/app/store/wshclient.ts

@@ -92,16 +92,21 @@ class WshClient {
         // TODO implement a timeout (setTimeout + sendResponse)
         const helper = new RpcResponseHelper(this, msg);
         const handlerName = `handle_${msg.command}`;
+        try {
+            let result: any = null;
             let prtn: any = null;
             if (handlerName in this) {
                 prtn = this[handlerName](helper, msg.data);
-            return;
             } else {
                 prtn = this.handle_default(helper, msg);
             }
-        try {
             if (prtn instanceof Promise) {
-                await prtn;
+                result = await prtn;
+            } else {
+                result = prtn;
+            }
+            if (!helper.done) {
+                helper.sendResponse({ data: result });
             }
         } catch (e) {
             if (!helper.done) {

frontend/app/store/wshclientapi.ts

@@ -12,6 +12,11 @@ class RpcApiType {
         return client.wshRpcCall("authenticate", data, opts);
     }
 
+    // command "blockinfo" [call]
+    BlockInfoCommand(client: WshClient, data: string, opts?: RpcOpts): Promise<BlockInfoData> {
+        return client.wshRpcCall("blockinfo", data, opts);
+    }
+
     // command "connconnect" [call]
     ConnConnectCommand(client: WshClient, data: string, opts?: RpcOpts): Promise<void> {
         return client.wshRpcCall("connconnect", data, opts);
@@ -207,6 +212,11 @@ class RpcApiType {
         return client.wshRpcCall("test", data, opts);
     }
 
+    // command "webselector" [call]
+    WebSelectorCommand(client: WshClient, data: CommandWebSelectorData, opts?: RpcOpts): Promise<string[]> {
+        return client.wshRpcCall("webselector", data, opts);
+    }
+
 }
 
 export const RpcApi = new RpcApiType();

frontend/app/store/wshrouter.ts

@@ -31,6 +31,9 @@ class WshRouter {
     constructor(upstreamClient: AbstractWshClient) {
         this.routeMap = new Map();
         this.rpcMap = new Map();
+        if (upstreamClient == null) {
+            throw new Error("upstream client cannot be null");
+        }
         this.upstreamClient = upstreamClient;
     }
 
@@ -46,34 +49,17 @@ class WshRouter {
     }
 
     // returns true if the message was sent
-    _sendRoutedMessage(msg: RpcMessage, destRouteId: string): boolean {
+    _sendRoutedMessage(msg: RpcMessage, destRouteId: string) {
         const client = this.routeMap.get(destRouteId);
         if (client) {
             client.recvRpcMessage(msg);
-            return true;
+            return;
         }
+        // there should always an upstream client
         if (!this.upstreamClient) {
-            // there should always be an upstream client
-            return false;
+            throw new Error(`no upstream client for message: ${msg}`);
         }
         this.upstreamClient?.recvRpcMessage(msg);
-        return true;
-    }
-
-    _handleNoRoute(msg: RpcMessage) {
-        dlog("no route for message", msg);
-        if (util.isBlank(msg.reqid)) {
-            // send a message instead
-            if (msg.command == "message") {
-                return;
-            }
-            const nrMsg = { command: "message", route: msg.source, data: { message: `no route for ${msg.route}` } };
-            this._sendRoutedMessage(nrMsg, SysRouteName);
-            return;
-        }
-        // send an error response
-        const nrMsg = { resid: msg.reqid, error: `no route for ${msg.route}` };
-        this._sendRoutedMessage(nrMsg, msg.source);
     }
 
     _registerRouteInfo(reqid: string, sourceRouteId: string, destRouteId: string) {
@@ -102,18 +88,17 @@ class WshRouter {
         }
         if (!util.isBlank(msg.command)) {
             // send + register routeinfo
-            const ok = this._sendRoutedMessage(msg, msg.route);
-            if (!ok) {
-                this._handleNoRoute(msg);
-                return;
-            }
+            if (!util.isBlank(msg.reqid)) {
                 this._registerRouteInfo(msg.reqid, msg.source, msg.route);
+            }
+            this._sendRoutedMessage(msg, msg.route);
             return;
         }
         if (!util.isBlank(msg.reqid)) {
             const routeInfo = this.rpcMap.get(msg.reqid);
             if (!routeInfo) {
                 // no route info, discard
+                dlog("no route info for reqid, discarding", msg);
                 return;
             }
             this._sendRoutedMessage(msg, routeInfo.destRouteId);
@@ -123,6 +108,7 @@ class WshRouter {
             const routeInfo = this.rpcMap.get(msg.resid);
             if (!routeInfo) {
                 // no route info, discard
+                dlog("no route info for resid, discarding", msg);
                 return;
             }
             this._sendRoutedMessage(msg, routeInfo.sourceRouteId);

frontend/app/store/wshrpcutil.ts

@@ -114,11 +114,24 @@ if (globalThis.window != null) {
     globalThis["consumeGenerator"] = consumeGenerator;
 }
 
+function initElectronWshrpc(electronClient: WshClient, authKey: string) {
+    DefaultRouter = new WshRouter(new UpstreamWshRpcProxy());
+    const handleFn = (event: WSEventType) => {
+        DefaultRouter.recvRpcMessage(event.data);
+    };
+    globalWS = new WSControl(getWSServerEndpoint(), "electron", handleFn, authKey);
+    globalWS.connectNow("connectWshrpc");
+    DefaultRouter.registerRoute(electronClient.routeId, electronClient);
+    addWSReconnectHandler(() => {
+        DefaultRouter.reannounceRoutes();
+    });
+    addWSReconnectHandler(wpsReconnectHandler);
+}
+
 function initWshrpc(windowId: string): WSControl {
     DefaultRouter = new WshRouter(new UpstreamWshRpcProxy());
     const handleFn = (event: WSEventType) => {
         DefaultRouter.recvRpcMessage(event.data);
-        // handleIncomingRpcMessage(globalOpenRpcs, event);
     };
     globalWS = new WSControl(getWSServerEndpoint(), windowId, handleFn);
     globalWS.connectNow("connectWshrpc");
@@ -144,6 +157,7 @@ class UpstreamWshRpcProxy implements AbstractWshClient {
 
 export {
     DefaultRouter,
+    initElectronWshrpc,
     initWshrpc,
     sendRawRpcMessage,
     sendRpcCommand,

frontend/types/gotypes.d.ts

@@ -25,6 +25,14 @@ declare global {
         meta?: MetaType;
     };
 
+    // wshrpc.BlockInfoData
+    type BlockInfoData = {
+        blockid: string;
+        tabid: string;
+        windowid: string;
+        meta: MetaType;
+    };
+
     // webcmd.BlockInputWSCommand
     type BlockInputWSCommand = {
         wscommand: "blockinput";
@@ -147,6 +155,15 @@ declare global {
         meta: MetaType;
     };
 
+    // wshrpc.CommandWebSelectorData
+    type CommandWebSelectorData = {
+        windowid: string;
+        blockid: string;
+        tabid: string;
+        selector: string;
+        opts?: WebSelectorOpts;
+    };
+
     // wconfig.ConfigError
     type ConfigError = {
         file: string;
@@ -641,6 +658,12 @@ declare global {
         updates?: WaveObjUpdate[];
     };
 
+    // wshrpc.WebSelectorOpts
+    type WebSelectorOpts = {
+        all?: boolean;
+        inner?: boolean;
+    };
+
     // wconfig.WidgetConfigType
     type WidgetConfigType = {
         "display:order"?: number;

package.json

@@ -51,6 +51,7 @@
         "@types/throttle-debounce": "^5",
         "@types/tinycolor2": "^1",
         "@types/uuid": "^10.0.0",
+        "@types/ws": "^8",
         "@vitejs/plugin-react-swc": "^3.7.0",
         "@vitest/coverage-istanbul": "^2.1.1",
         "electron": "^32.1.0",
@@ -127,7 +128,8 @@
         "throttle-debounce": "^5.0.2",
         "tinycolor2": "^1.6.0",
         "use-device-pixel-ratio": "^1.1.2",
-        "winston": "^3.14.2"
+        "winston": "^3.14.2",
+        "ws": "^8.18.0"
     },
     "packageManager": "yarn@4.4.1"
 }

pkg/web/ws.go

@@ -262,12 +262,18 @@ func HandleWsInternal(w http.ResponseWriter, r *http.Request) error {
 	outputCh := make(chan any, 100)
 	closeCh := make(chan any)
 	eventbus.RegisterWSChannel(wsConnId, windowId, outputCh)
+	var routeId string
+	if windowId == wshutil.ElectronRoute {
+		routeId = wshutil.ElectronRoute
+	} else {
+		routeId = wshutil.MakeWindowRouteId(windowId)
+	}
 	defer eventbus.UnregisterWSChannel(wsConnId)
 	// we create a wshproxy to handle rpc messages to/from the window
 	wproxy := wshutil.MakeRpcProxy()
-	wshutil.DefaultRouter.RegisterRoute(wshutil.MakeWindowRouteId(windowId), wproxy)
+	wshutil.DefaultRouter.RegisterRoute(routeId, wproxy)
 	defer func() {
-		wshutil.DefaultRouter.UnregisterRoute(wshutil.MakeWindowRouteId(windowId))
+		wshutil.DefaultRouter.UnregisterRoute(routeId)
 		close(wproxy.ToRemoteCh)
 	}()
 	// WshServerFactoryFn(rpcInputCh, rpcOutputCh, wshrpc.RpcContext{})

pkg/wshrpc/wshclient/wshclient.go

@@ -19,6 +19,12 @@ func AuthenticateCommand(w *wshutil.WshRpc, data string, opts *wshrpc.RpcOpts) (
 	return resp, err
 }
 
+// command "blockinfo", wshserver.BlockInfoCommand
+func BlockInfoCommand(w *wshutil.WshRpc, data string, opts *wshrpc.RpcOpts) (*wshrpc.BlockInfoData, error) {
+	resp, err := sendRpcRequestCallHelper[*wshrpc.BlockInfoData](w, "blockinfo", data, opts)
+	return resp, err
+}
+
 // command "connconnect", wshserver.ConnConnectCommand
 func ConnConnectCommand(w *wshutil.WshRpc, data string, opts *wshrpc.RpcOpts) error {
 	_, err := sendRpcRequestCallHelper[any](w, "connconnect", data, opts)
@@ -248,4 +254,10 @@ func TestCommand(w *wshutil.WshRpc, data string, opts *wshrpc.RpcOpts) error {
 	return err
 }
 
+// command "webselector", wshserver.WebSelectorCommand
+func WebSelectorCommand(w *wshutil.WshRpc, data wshrpc.CommandWebSelectorData, opts *wshrpc.RpcOpts) ([]string, error) {
+	resp, err := sendRpcRequestCallHelper[[]string](w, "webselector", data, opts)
+	return resp, err
+}
+
 

pkg/wshrpc/wshrpctypes.go

@@ -40,6 +40,7 @@ const (
 	Command_FileAppend        = "fileappend"
 	Command_FileAppendIJson   = "fileappendijson"
 	Command_ResolveIds        = "resolveids"
+	Command_BlockInfo         = "blockinfo"
 	Command_CreateBlock       = "createblock"
 	Command_DeleteBlock       = "deleteblock"
 	Command_FileWrite         = "filewrite"
@@ -65,6 +66,8 @@ const (
 	Command_ConnConnect      = "connconnect"
 	Command_ConnDisconnect   = "conndisconnect"
 	Command_ConnList         = "connlist"
+
+	Command_WebSelector = "webselector"
 )
 
 type RespOrErrorUnion[T any] struct {
@@ -101,6 +104,7 @@ type WshRpcInterface interface {
 	StreamCpuDataCommand(ctx context.Context, request CpuDataRequest) chan RespOrErrorUnion[TimeSeriesData]
 	TestCommand(ctx context.Context, data string) error
 	SetConfigCommand(ctx context.Context, data wconfig.MetaSettingsType) error
+	BlockInfoCommand(ctx context.Context, blockId string) (*BlockInfoData, error)
 
 	// connection functions
 	ConnStatusCommand(ctx context.Context) ([]ConnStatus, error)
@@ -120,6 +124,8 @@ type WshRpcInterface interface {
 	RemoteWriteFileCommand(ctx context.Context, data CommandRemoteWriteFileData) error
 	RemoteFileJoinCommand(ctx context.Context, paths []string) (*FileInfo, error)
 	RemoteStreamCpuDataCommand(ctx context.Context) chan RespOrErrorUnion[TimeSeriesData]
+
+	WebSelectorCommand(ctx context.Context, data CommandWebSelectorData) ([]string, error)
 }
 
 // for frontend
@@ -348,3 +354,23 @@ type ConnStatus struct {
 	ActiveConnNum int    `json:"activeconnnum"`
 	Error         string `json:"error,omitempty"`
 }
+
+type WebSelectorOpts struct {
+	All   bool `json:"all,omitempty"`
+	Inner bool `json:"inner,omitempty"`
+}
+
+type CommandWebSelectorData struct {
+	WindowId string           `json:"windowid"`
+	BlockId  string           `json:"blockid" wshcontext:"BlockId"`
+	TabId    string           `json:"tabid" wshcontext:"TabId"`
+	Selector string           `json:"selector"`
+	Opts     *WebSelectorOpts `json:"opts,omitempty"`
+}
+
+type BlockInfoData struct {
+	BlockId  string              `json:"blockid"`
+	TabId    string              `json:"tabid"`
+	WindowId string              `json:"windowid"`
+	Meta     waveobj.MetaMapType `json:"meta"`
+}

pkg/wshrpc/wshserver/wshserver.go

@@ -526,3 +526,24 @@ func (ws *WshServer) ConnReinstallWshCommand(ctx context.Context, connName strin
 func (ws *WshServer) ConnListCommand(ctx context.Context) ([]string, error) {
 	return conncontroller.GetConnectionsList()
 }
+
+func (ws *WshServer) BlockInfoCommand(ctx context.Context, blockId string) (*wshrpc.BlockInfoData, error) {
+	blockData, err := wstore.DBMustGet[*waveobj.Block](ctx, blockId)
+	if err != nil {
+		return nil, fmt.Errorf("error getting block: %w", err)
+	}
+	tabId, err := wstore.DBFindTabForBlockId(ctx, blockId)
+	if err != nil {
+		return nil, fmt.Errorf("error finding tab for block: %w", err)
+	}
+	windowId, err := wstore.DBFindWindowForTabId(ctx, tabId)
+	if err != nil {
+		return nil, fmt.Errorf("error finding window for tab: %w", err)
+	}
+	return &wshrpc.BlockInfoData{
+		BlockId:  blockId,
+		TabId:    tabId,
+		WindowId: windowId,
+		Meta:     blockData.Meta,
+	}, nil
+}

pkg/wshutil/wshrouter.go

@@ -18,6 +18,7 @@ import (
 
 const DefaultRoute = "wavesrv"
 const SysRoute = "sys" // this route doesn't exist, just a placeholder for system messages
+const ElectronRoute = "electron"
 
 // this works like a network switch
 

yarn.lock

@@ -2594,6 +2594,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/ws@npm:^8":
+  version: 8.5.12
+  resolution: "@types/ws@npm:8.5.12"
+  dependencies:
+    "@types/node": "npm:*"
+  checksum: 10c0/3fd77c9e4e05c24ce42bfc7647f7506b08c40a40fe2aea236ef6d4e96fc7cb4006a81ed1b28ec9c457e177a74a72924f4768b7b4652680b42dfd52bc380e15f9
+  languageName: node
+  linkType: hard
+
 "@types/yauzl@npm:^2.9.1":
   version: 2.10.3
   resolution: "@types/yauzl@npm:2.10.3"
@@ -10210,6 +10219,7 @@ __metadata:
     "@types/throttle-debounce": "npm:^5"
     "@types/tinycolor2": "npm:^1"
     "@types/uuid": "npm:^10.0.0"
+    "@types/ws": "npm:^8"
     "@vitejs/plugin-react-swc": "npm:^3.7.0"
     "@vitest/coverage-istanbul": "npm:^2.1.1"
     "@xterm/addon-fit": "npm:^0.10.0"
@@ -10277,6 +10287,7 @@ __metadata:
     vite-tsconfig-paths: "npm:^5.0.1"
     vitest: "npm:^2.1.1"
     winston: "npm:^3.14.2"
+    ws: "npm:^8.18.0"
   languageName: unknown
   linkType: soft
 
@@ -11218,7 +11229,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ws@npm:^8.2.3":
+"ws@npm:^8.18.0, ws@npm:^8.2.3":
   version: 8.18.0
   resolution: "ws@npm:8.18.0"
   peerDependencies: