How to upload several photos using aw3? - amazon-web-services

Question

I use react native and backend was built with Prisma and GraphQL (Apollo Server).
I don't store image data to Prisma but to aw3.
The problem is I want to upload several images at once to my app. So I make image column of Prisma Array [], not String.
But as using aw3, I can upload only one image at once. So even if I make image column as Array, I can't upload several images at once as Array using aw3.
When I searched people suggest 3 options in order to upload multiple files by aw3.
multi-thread
multi-processing
zip upload (amazon-lambda)
In my case(to upload files as Array),
which option is most advisable?
And can you teach me the way of doing that?
My backend code:
export const uploadToS3 = async (file, userId, folderName) => {
const { filename, createReadStream } = await file;
const readStream = createReadStream();
const objectName = `${folderName}/${userId}-${Date.now()}-${filename}`;
const { Location } = await new AWS.S3()
.upload({
Bucket: "chungchunonuploads",
Key: objectName,
ACL: "public-read",
Body: readStream,
})
.promise();
return Location;
};

Answer 1

We need to resolve multiple file upload promises with Promise.all. Let us refactor our code and split it into 2 functions.
// Assume that we have list of all files to upload
const filesToUpload = [file1, file2, file3, fileN];
export const uploadSingleFileToS3 = async (file, userId, folderName) => {
const { filename, createReadStream } = await file;
const readStream = createReadStream();
const objectName = `${folderName}/${userId}-${Date.now()}-${filename}`;
const response = await new AWS.S3().upload({
Bucket: "chungchunonuploads",
Key: objectName,
ACL: "public-read",
Body: readStream,
});
return response;
};
const uploadMultipleFilesToS3 = async (filesToUpload, userId, folderName) => {
const uploadPromises = filesToUpload.map((file) => {
return uploadSingleFileToS3(file, userId, folderName);
});
// Array containing all uploaded files data
const uploadResult = await Promise.all(uploadPromises);
// Add logic here to update the database with Prisma ORM
};
// Call uploadMultipleFilesToS3 with all required parameters