Demo of creating and and streaming files to a client
Uses the nodejs stream API, json2csv streaming API and falso to generate mock data
Includes an Angular application using the HttpClient, NgRx ComponentStore and file-saver packages to download the file and show progress
To run
yarn nx serve api
Go to http://localhost:333/api in your browser. a CSV filled with data will get downloaded
OR
yarn nx serve client and open the Angular app that will display download progress and then save to the file when done.
References:
https://docs.nestjs.com/techniques/streaming-files https://www.npmjs.com/package/json2csv https://developer.mozilla.org/en-US/docs/Web/API/Streams_API/Using_readable_streams https://angular.io/api/common/http/HttpClient#get https://ngrx.io/guide/component-store https://www.npmjs.com/package/file-saver