create gcs storage in node - node.js

Question

const functions = require('firebase-functions')
const { Storage } = require('#google-cloud/storage');
let gcs = new Storage ();
const os = require('os');
const path = require('path');
exports.onFileChange = functions.storage.object().onFinalize(event => {
console.log(event);
const bucket = event.bucket;
contentType = event.contentType;
const filePath = event.name;
console.log('file detected')
if(path.basename(filePath).startsWith('renamed-')){
console.log('already renamed this file')
return;
}
const destBucket = gcs.bucket(bucket);
const tmpFilePath = path.join(os.tmpdir(), path.basename(filePath));
const metadata = { contentType : contentType }
return destBucket.file(filePath).download({
destination : tmpFilePath
}).then(() => {
return destBucket.upload(tmpFilePath, {
destination:'renamed-'+ path.basename(filePath),
metadata: metadata
})
})
});
the error is:-
`Function failed on loading user code. Error message: Code in file index.js can't be loaded.
Is there a syntax error in your code?
Detailed stack trace: /srv/node_modules/p-limit/index.js:30
} catch {}
^
SyntaxError: Unexpected token {
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:139:10)
at Module._compile (module.js:617:28)
at Object.Module._extensions..js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Module.require (module.js:597:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/srv/node_modules/#google-cloud/storage/build/src/bucke here t.js:25:16)
`

Answer 1

The error message implies you have a syntax error in your function.
Change the line contentType = event.contentType; to const contentType = event.contentType; and your syntax er