fix: static file handle & ws connect

packages/backend/server/src/core/static-files/static.ts

@@ -10,6 +10,16 @@ import { isMobileRequest } from '../utils/user-agent';
 
 const staticPathRegex = /^\/(_plugin|assets|imgs|js|plugins|static)\//;
 
+function isMissingStaticAssetError(error: unknown) {
+  if (!error || typeof error !== 'object') {
+    return false;
+  }
+
+  const err = error as { code?: string; status?: number; statusCode?: number };
+
+  return err.code === 'ENOENT' || err.status === 404 || err.statusCode === 404;
+}
+
 @Injectable()
 export class StaticFilesResolver implements OnModuleInit {
   constructor(
@@ -86,7 +96,18 @@ export class StaticFilesResolver implements OnModuleInit {
         next();
         return;
       }
-      routeByUA(req, res, next, true);
+      routeByUA(
+        req,
+        res,
+        error => {
+          if (isMissingStaticAssetError(error)) {
+            res.status(404).end();
+            return;
+          }
+          next(error);
+        },
+        true
+      );
     });
 
     // /

packages/backend/server/src/core/sync/gateway.ts

@@ -210,6 +210,9 @@ export class SpaceSyncGateway
   private readonly server!: Server;
 
   private connectionCount = 0;
+  private readonly socketUsers = new Map<string, string>();
+  private readonly localUserConnectionCounts = new Map<string, number>();
+  private unresolvedPresenceSockets = 0;
   private flushTimer?: NodeJS.Timeout;
 
   constructor(
@@ -224,7 +227,9 @@ export class SpaceSyncGateway
   onModuleInit() {
     this.flushTimer = setInterval(() => {
       this.flushActiveUsersMinute().catch(error => {
-        this.logger.warn('Failed to flush active users minute', error as Error);
+        this.logger.warn(
+          `Failed to flush active users minute: ${this.formatError(error)}`
+        );
       });
     }, 60_000);
     this.flushTimer.unref?.();
@@ -278,8 +283,7 @@ export class SpaceSyncGateway
       };
     } catch (error) {
       this.logger.warn(
-        'Failed to merge updates for broadcast, falling back to batch',
-        error as Error
+        `Failed to merge updates for broadcast, falling back to batch: ${this.formatError(error)}`
       );
       return {
         spaceType,
@@ -302,14 +306,20 @@ export class SpaceSyncGateway
     this.connectionCount++;
     this.logger.debug(`New connection, total: ${this.connectionCount}`);
     metrics.socketio.gauge('connections').record(this.connectionCount);
-    this.attachPresenceUserId(client);
-    this.flushActiveUsersMinute().catch(error => {
-      this.logger.warn('Failed to flush active users minute', error as Error);
+    const userId = this.attachPresenceUserId(client);
+    this.trackConnectedSocket(client.id, userId);
+    void this.flushActiveUsersMinute({
+      aggregateAcrossCluster: false,
+    }).catch(error => {
+      this.logger.warn(
+        `Failed to flush active users minute: ${this.formatError(error)}`
+      );
     });
   }
 
-  handleDisconnect(_client: Socket) {
+  handleDisconnect(client: Socket) {
     this.connectionCount = Math.max(0, this.connectionCount - 1);
+    this.trackDisconnectedSocket(client.id);
     this.logger.debug(
       `Connection disconnected, total: ${this.connectionCount}`
     );
@@ -317,21 +327,24 @@ export class SpaceSyncGateway
     void this.flushActiveUsersMinute({
       aggregateAcrossCluster: false,
     }).catch(error => {
-      this.logger.warn('Failed to flush active users minute', error as Error);
+      this.logger.warn(
+        `Failed to flush active users minute: ${this.formatError(error)}`
+      );
     });
   }
 
-  private attachPresenceUserId(client: Socket) {
+  private attachPresenceUserId(client: Socket): string | null {
     const request = client.request as Request;
     const userId = request.session?.user.id ?? request.token?.user.id;
     if (typeof userId !== 'string' || !userId) {
       this.logger.warn(
         `Unable to resolve authenticated user id for socket ${client.id}`
       );
-      return;
+      return null;
     }
 
     client.data[SOCKET_PRESENCE_USER_ID_KEY] = userId;
+    return userId;
   }
 
   private resolvePresenceUserId(socket: { data?: unknown }) {
@@ -345,6 +358,60 @@ export class SpaceSyncGateway
     return typeof userId === 'string' && userId ? userId : null;
   }
 
+  private trackConnectedSocket(socketId: string, userId: string | null) {
+    if (!userId) {
+      this.unresolvedPresenceSockets++;
+      return;
+    }
+
+    this.socketUsers.set(socketId, userId);
+    const prev = this.localUserConnectionCounts.get(userId) ?? 0;
+    this.localUserConnectionCounts.set(userId, prev + 1);
+  }
+
+  private trackDisconnectedSocket(socketId: string) {
+    const userId = this.socketUsers.get(socketId);
+    if (!userId) {
+      this.unresolvedPresenceSockets = Math.max(
+        0,
+        this.unresolvedPresenceSockets - 1
+      );
+      return;
+    }
+
+    this.socketUsers.delete(socketId);
+    const next = (this.localUserConnectionCounts.get(userId) ?? 1) - 1;
+    if (next <= 0) {
+      this.localUserConnectionCounts.delete(userId);
+    } else {
+      this.localUserConnectionCounts.set(userId, next);
+    }
+  }
+
+  private resolveLocalActiveUsers() {
+    if (this.unresolvedPresenceSockets > 0) {
+      return Math.max(0, this.connectionCount);
+    }
+
+    return this.localUserConnectionCounts.size;
+  }
+
+  private formatError(error: unknown) {
+    if (error instanceof Error) {
+      return error.stack ?? error.message;
+    }
+
+    if (typeof error === 'string') {
+      return error;
+    }
+
+    try {
+      return JSON.stringify(error);
+    } catch {
+      return String(error);
+    }
+  }
+
   private async flushActiveUsersMinute(options?: {
     aggregateAcrossCluster?: boolean;
   }) {
@@ -352,7 +419,7 @@ export class SpaceSyncGateway
     minute.setSeconds(0, 0);
 
     const aggregateAcrossCluster = options?.aggregateAcrossCluster ?? true;
-    let activeUsers = Math.max(0, this.connectionCount);
+    let activeUsers = this.resolveLocalActiveUsers();
     if (aggregateAcrossCluster) {
       try {
         const sockets = await this.server.fetchSockets();
@@ -377,8 +444,7 @@ export class SpaceSyncGateway
         }
       } catch (error) {
         this.logger.warn(
-          'Failed to aggregate active users from sockets, using local value',
-          error as Error
+          `Failed to aggregate active users from sockets, using local value: ${this.formatError(error)}`
         );
       }
     }