启用一下刚这个errors拦截处理器，它现在把403错误变成了502错误，感觉用来做错误信息规范化比较适合

src/core/interceptors/errors.interceptor.ts

@@ -1,9 +1,14 @@
-import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from '@nestjs/common';
-import { Observable } from 'rxjs';
+import { CallHandler, ExecutionContext, Injectable, NestInterceptor, BadGatewayException } from '@nestjs/common';
+import { Observable, throwError } from 'rxjs';
+import { catchError } from 'rxjs/operators'
 
 @Injectable()
 export class ErrorsInterceptor implements NestInterceptor {
   intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
-    return next.handle();
+    return next
+    .handle()
+    .pipe(
+      catchError(error => throwError(new BadGatewayException()))
+    );
   }
 }

src/modules/posts/posts.controller.ts

@@ -6,6 +6,7 @@ import { DemoAuthGuard } from '../../core/guards/demo-auth.guard'
 import { Roles } from '../../core/decorators/roles.decorator'
 import { LoggingInterceptor } from '../../core/interceptors/logging.interceptor'
 import { TransformInterceptor } from '../../core/interceptors/transform.interceptor'
+import { ErrorsInterceptor } from '../../core/interceptors/errors.interceptor'
 
 @Controller('posts')
 // @UseGuards(DemoAuthGuard)
@@ -17,8 +18,10 @@ export class PostsController {
 
     @Get()
     @UseInterceptors(TransformInterceptor)
+    @UseInterceptors(ErrorsInterceptor)
     index() {
-        return this.demoService.findAll();
+        throw new ForbiddenException();
+        // return this.demoService.findAll();
     }
 
     @Get(':id')