feat : exceptionfilter

src/app.module.ts

@@ -6,6 +6,8 @@ import { CommentModule } from './domain/comment/comment.module';
 import { ConfigModule } from '@nestjs/config';
 import { DatabaseModule } from './database/database.module';
 import { EventEmitterModule } from '@nestjs/event-emitter';
+import { APP_INTERCEPTOR } from '@nestjs/core';
+import { ExceptionInterceptor } from './common/exception/interceptor';
 
 @Module({
   imports: [
@@ -23,6 +25,12 @@ import { EventEmitterModule } from '@nestjs/event-emitter';
     CommentModule,
   ],
   controllers: [AppController],
-  providers: [AppService],
+  providers: [
+    {
+      provide: APP_INTERCEPTOR,
+      useClass: ExceptionInterceptor,
+    },
+    AppService,
+  ],
 })
 export class AppModule {}

src/common/exception/filter.ts

@@ -6,10 +6,10 @@ export class BaseExceptionFilter implements ExceptionFilter {
   private logger = new Logger(BaseExceptionFilter.name);
 
   catch(error: any, host: ArgumentsHost) {
+    this.logger.error(error);
     const ctx = host.switchToHttp();
     const response = ctx.getResponse<Response>();
     const status = error.status;
-    this.logger.error(error);
     if (status >= 400 && status < 500) {
       response.status(status).send({ result: false, error: error.response });
     } else {

src/common/exception/interceptor.ts

@@ -0,0 +1,19 @@
+import {
+  CallHandler,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { catchError } from 'rxjs/operators';
+@Injectable()
+export class ExceptionInterceptor implements NestInterceptor {
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    return next.handle().pipe(
+      catchError(async (error) => {
+        //TODO: 알 수 없는 에러 발생 시 알림 전송
+        return Promise.reject(error);
+      }),
+    );
+  }
+}

src/main.ts

@@ -1,7 +1,8 @@
-import { BaseExceptionFilter, NestFactory } from '@nestjs/core';
+import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 import 'dotenv/config';
 import { ValidationPipe } from '@nestjs/common';
+import { BaseExceptionFilter } from './common/exception/filter';
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   app.setGlobalPrefix('api');