@middy/ws-json-body-parser/index.js

WebSocket JSON body parser middleware for the middy framework

import { createError } from '@middy/util';
const defaults = {
    reviver: undefined
};
const wsJsonBodyParserMiddleware = (opts = {})=>{
    const options = {
        ...defaults,
        ...opts
    };
    const wsJsonBodyParserMiddlewareBefore = async (request)=>{
        const { body } = request.event;
        try {
            const data = request.event.isBase64Encoded ? Buffer.from(body, 'base64').toString() : body;
            request.event.body = JSON.parse(data, options.reviver);
        } catch (err) {
            // UnprocessableEntity
            throw createError(422, 'Invalid or malformed JSON was provided', {
                cause: {
                    package: '@middy/ws-json-body-parser',
                    data: err
                }
            });
        }
    };
    return {
        before: wsJsonBodyParserMiddlewareBefore
    };
};
export default wsJsonBodyParserMiddleware;