application/octet-stream issue while using google moderate images trigger (blur image) - node.js

Question

I,m using moderate images solution trigger from google.
I taked this solution from here.
I ask some to upgrade for me this solution & here is code:
'use strict'
const gm = require('gm').subClass({imageMagick: true})
const functions = require('firebase-functions')
const admin = require('firebase-admin')
admin.initializeApp()
const Vision = require('#google-cloud/vision')
const vision = new Vision.ImageAnnotatorClient()
const spawn = require('child-process-promise').spawn
const path = require('path')
const fs = require('fs')
const { Storage } = require('#google-cloud/storage')
const gcs = new Storage({
projectId: xxxxxxxxxxx,
})
exports.blurOffensiveImages = functions.storage
.object()
.onFinalize(async (object) => {
const file = gcs.bucket(object.bucket).file(object.name)
const filePath = `gs://${object.bucket}/${object.name}`
console.log(`Analyzing ${file.name}.`)
try {
const [result] = await vision.safeSearchDetection(filePath)
const detections = result.safeSearchAnnotation || {}
if (
detections.adult === 'VERY_LIKELY' ||
detections.violence === 'VERY_LIKELY'
) {
console.log(`Detected ${file.name} as inappropriate.`)
await blurImage(file, object.bucket, object.metadata)
console.log('Deleted local file', file)
return null
} else {
console.log(`Detected ${file.name} as OK.`)
}
} catch (err) {
console.error(`Failed to analyze ${file.name}.`, err)
throw err
}
})
async function blurImage(file, bucketName, metadata) {
const tempLocalPath = `/tmp/${path.parse(file.name).base}`
const bucket = gcs.bucket(bucketName)
await file.download({ destination: tempLocalPath })
console.log('The file has been downloaded to', tempLocalPath)
// Blur the image using ImageMagick.
await new Promise((resolve, reject) => {
gm(tempLocalPath)
.blur(0, 20)
.write(tempLocalPath, (err, stdout) => {
if (err) {
console.error('Failed to blur image.', err);
reject(err);
} else {
console.log(`Blurred image: ${file.name}`);
resolve(stdout);
}
});
});
console.log('Blurred image created at', tempLocalPath)
await bucket.upload(tempLocalPath, {
destination: file.name,
metadata: { metadata: metadata },
})
console.log('Blurred image uploaded to Storage at', file)
return fs.unlink(tempLocalPath, (e) => { if (e) {console.log(e)}})
}
End it's worked perfect, with one bad issue.
Sometimes when user sending list of photos i have "application/octet-stream" file type, but it should be "image/jpg" all media files at my project should be image/jpg.
one user's publication with error in image data type
It's looks like this trigger stuck when it executing.
I made delay in uploading images in my project, but it's doesn't helps me.
I tested - when i delete this trigger - all uploading photos is well & no issues at all.
Help me fix it.
P.S. want to say also, after uploading - image should have all data like original. (Destination, name etc.)