Remove server side workspace feature flag check (opensearch-project#69)

stop checking workspace feature flag in server side

This is due to error when retrieving uiSettings in
registerOnPreRouting which request is still unauthenticated

---------

Signed-off-by: Yulong Ruan <ruanyl@amazon.com>

src/core/server/server.ts

@@ -261,10 +261,7 @@ export class Server {
       opensearch: opensearchStart,
       savedObjects: savedObjectsStart,
     });
-    await this.workspaces.start({
-      savedObjects: savedObjectsStart,
-      uiSettings: uiSettingsStart,
-    });
+    await this.workspaces.start();
 
     this.coreStart = {
       capabilities: capabilitiesStart,

src/core/server/workspaces/workspaces_service.ts

@@ -8,13 +8,9 @@ import { CoreContext } from '../core_context';
 import { InternalHttpServiceSetup } from '../http';
 import { Logger } from '../logging';
 import { registerRoutes } from './routes';
-import {
-  InternalSavedObjectsServiceSetup,
-  InternalSavedObjectsServiceStart,
-} from '../saved_objects';
+import { InternalSavedObjectsServiceSetup } from '../saved_objects';
 import { IWorkspaceDBImpl } from './types';
 import { WorkspacesClientWithSavedObject } from './workspaces_client';
-import { UiSettingsServiceStart } from '../ui_settings/types';
 import { WorkspaceSavedObjectsClientWrapper } from './saved_objects';
 
 export interface WorkspacesServiceSetup {
@@ -33,47 +29,27 @@ export interface WorkspacesSetupDeps {
 export type InternalWorkspacesServiceSetup = WorkspacesServiceSetup;
 export type InternalWorkspacesServiceStart = WorkspacesServiceStart;
 
-/** @internal */
-export interface WorkspacesStartDeps {
-  savedObjects: InternalSavedObjectsServiceStart;
-  uiSettings: UiSettingsServiceStart;
-}
-
 export class WorkspacesService
   implements CoreService<WorkspacesServiceSetup, WorkspacesServiceStart> {
   private logger: Logger;
   private client?: IWorkspaceDBImpl;
-  private startDeps?: WorkspacesStartDeps;
+
   constructor(coreContext: CoreContext) {
     this.logger = coreContext.logger.get('workspaces-service');
   }
 
   private proxyWorkspaceTrafficToRealHandler(setupDeps: WorkspacesSetupDeps) {
     /**
-     * Proxy all {basePath}/w/{workspaceId}{osdPath*} paths to
-     * {basePath}{osdPath*} when workspace is enabled
-     *
-     * Return HTTP 404 if accessing {basePath}/w/{workspaceId} when workspace is disabled
+     * Proxy all {basePath}/w/{workspaceId}{osdPath*} paths to {basePath}{osdPath*}
      */
     setupDeps.http.registerOnPreRouting(async (request, response, toolkit) => {
       const regexp = /\/w\/([^\/]*)/;
       const matchedResult = request.url.pathname.match(regexp);
 
       if (matchedResult) {
-        if (this.startDeps) {
-          const savedObjectsClient = this.startDeps.savedObjects.getScopedClient(request);
-          const uiSettingsClient = this.startDeps.uiSettings.asScopedToClient(savedObjectsClient);
-          const workspacesEnabled = await uiSettingsClient.get<boolean>('workspace:enabled');
-
-          if (workspacesEnabled) {
-            const requestUrl = new URL(request.url.toString());
-            requestUrl.pathname = requestUrl.pathname.replace(regexp, '');
-            return toolkit.rewriteUrl(requestUrl.toString());
-          } else {
-            // If workspace was disable, return HTTP 404
-            return response.notFound();
-          }
-        }
+        const requestUrl = new URL(request.url.toString());
+        requestUrl.pathname = requestUrl.pathname.replace(regexp, '');
+        return toolkit.rewriteUrl(requestUrl.toString());
       }
       return toolkit.next();
     });
@@ -108,8 +84,7 @@ export class WorkspacesService
     };
   }
 
-  public async start(deps: WorkspacesStartDeps): Promise<InternalWorkspacesServiceStart> {
-    this.startDeps = deps;
+  public async start(): Promise<InternalWorkspacesServiceStart> {
     this.logger.debug('Starting SavedObjects service');
 
     return {