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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 2x 2x 2x 5x 16x 5x 15x 15x 3x 1x 1x 1x 2x 2x 2x | /* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ import { Context } from 'aws-lambda'; import middy from '@middy/core'; import { BasicHttpError, BasicHttpResponse } from 'shared_types'; type ConfigType = { headers: Record<string, string>; }; const defaultConfig: ConfigType = { headers: {}, }; const ResponseFormatter = <T, R, C extends Context = Context>( config: ConfigType = defaultConfig ): middy.MiddlewareObject<T, R, C> => { const addHeaders = ( handler: middy.HandlerLambda, additonalHeaders?: Record<string, string> ) => { handler.response.headers = Object.assign( handler.response.headers || {}, additonalHeaders ); }; return { after: (handler: middy.HandlerLambda, next: middy.NextFunction) => { addHeaders(handler, config.headers); return next(); }, onError: (handler: middy.HandlerLambda, next: middy.NextFunction) => { if (handler.error instanceof BasicHttpError) { handler.response = BasicHttpResponse.ofError(handler.error); addHeaders(handler, config.headers); return next(); } else { // other exceptions, respond with 500 - Internal Server Error handler.response = BasicHttpResponse.ofError( BasicHttpError.internalServerError(handler.error.message) ); return next(); } }, }; }; export default ResponseFormatter; |