Appery.io aws S3 integration - amazon-web-services

Question

Looking for help on how to have a appery.io ionic 5 app upload images, files, videos etc. to aws S3. I am using aws DynamoDB thru API Express successfully and can get a presigned S3 URL thru API Express as well. My problem is using the presigned URL to upload a image/file. Tried fetch, httpClient etc. Some Guidence would be greatly appreciated.
Thank you

Answer 1

To work with binary data in API Express you can do the following:
Create new service of Custom REST API type
In START node select POST method and Binary for request body
With that you should be able to select Binary request as parameter value in SQL node
The second part of the question is how can you get the binary data if you have fileUrl.
Import API Express service created on a previous step into your project with Create New > API Express service
On Code tab create a variable named buffer of type Any
On Data tab add datasource for the imported API Express service. In Before send mapping connect buffer with body.data
Drop the button on Screen1
Add event with TypeScript code to it:
fetch(fileUrl).then(res => res.arrayBuffer()).then(arrayBuffer => {
this.buffer = arrayBuffer;
this.Apperyio.execDataService(this, "myAexService");
});