SCAL-103002 check TS host response

src/auth.ts

@@ -36,13 +36,14 @@
  */
 export enum AuthFailureType {
     SDK = 'SDK',
+    INVALID_TS_HOST = 'INVALID_TS_HOST',
     NO_COOKIE_ACCESS = 'NO_COOKIE_ACCESS',
     EXPIRY = 'EXPIRY',
     OTHER = 'OTHER',
 }
 
 /**
  * Enum for auth status emitted by the emitter returned from {@link init}.
  * @group Authentication / Init
  */
 export enum AuthStatus {
@@ -66,13 +67,13 @@
      * Emitted when inPopup is true in the SAMLRedirect flow and the
      * popup is waiting to be triggered either programmatically
      * or by the trigger button.
      * @version SDK: 1.19.0
      */
     WAITING_FOR_POPUP = 'WAITING_FOR_POPUP',
 }
 
 /**
  * Event emitter returned from {@link init}.
  * @group Authentication / Init
  */
 export interface AuthEventEmitter {
@@ -100,7 +101,7 @@
     once(event: AuthStatus.SUCCESS, listener: (sessionInfo: any) => void): this;
     /**
      * Trigger an event on the emitter returned from init.
      * @param {@link AuthEvent}
      */
     emit(event: AuthEvent, ...args: any[]): boolean;
     /**
@@ -119,7 +120,7 @@
 }
 
 /**
  * Events which can be triggered on the emitter returned from {@link init}.
  * @group Authentication / Init
  */
 export enum AuthEvent {
@@ -132,7 +133,7 @@
 
 let authEE: EventEmitter<AuthStatus | AuthEvent>;
 
 /**
  *
  */
 export function getAuthEE(): EventEmitter<AuthStatus | AuthEvent> {
@@ -141,7 +142,7 @@
 
 /**
  *
  * @param eventEmitter
  */
 export function setAuthEE(eventEmitter: EventEmitter<AuthStatus | AuthEvent>): void {
     authEE = eventEmitter;
@@ -176,7 +177,7 @@
 
 /**
  *
  * @param failureType
  */
 export function notifyAuthFailure(failureType: AuthFailureType): void {
     if (!authEE) {

src/embed/base.ts

@@ -209,9 +209,25 @@
     if (getEmbedConfig().callPrefetch) {
         prefetch(getEmbedConfig().thoughtSpotHost);
     }
+    validateThoughtSpotHost(embedConfig.thoughtSpotHost);
     return authEE as AuthEventEmitter;
 };
 
+
+const validateThoughtSpotHost = async (thoughtSpotHost: string) => {
+    try {
+        const response = await fetch(`${thoughtSpotHost}`);
+        if (response.status !== 200) {
+            logger.error(`Check if Thoughtspot Host is Valid: ${response.statusText}`);
+            notifyAuthFailure(AuthFailureType.INVALID_TS_HOST);
+        } else {
+            logger.info("ThoughtSpot host is valid.");
+        }
+    } catch (error) {
+        logger.error("Error validating ThoughtSpot host:", error);
+        notifyAuthFailure(AuthFailureType.INVALID_TS_HOST);
+    }
+};
 /**
  *
  */