Limit Google Storage file upload

limit_file_size_upload.ts

import { GetSignedUrlConfig, Storage } from '@google-cloud/storage'

const storage = new Storage()

//  this comes from the front end
const input = {
  contentType: 'application/jpeg',
  contentLength: 10000 // size in bytes
}

const filename = 'somefilename'

const writeOptions: GetSignedUrlConfig = {
    version: 'v4',
    action: 'write',
    expires: Date.now() + parseInt(process.env.MAX_UPLOAD_TIME_IN_MILLISECONDS),
    contentType: input.contentType,
    extensionHeaders: {
        "content-length": input.contentLength
    }
}

const url = await storage
                    .bucket(process.env.BUCKET_NAME)
                    .file(filename)
                    .getSignedUrl(writeOptions)