How to upload an in memory file data to google cloud storage using nodejs?

Question

I am reading an image from a url and processing it. I need to upload this data to a file in cloud storage, currently i am writing the data to a file and uploading this file

Answer 1

The data can be uploaded without writing to a file by using nodes streams.

const stream     = require('stream'),
      dataStream = new stream.PassThrough(),
      gcFile     = cloudStorage.bucket(bucketName).file(fileName)

dataStream.push('content-to-upload')
dataStream.push(null)

await new Promise((resolve, reject) => {
  dataStream.pipe(gcFile.createWriteStream({
    resumable  : false,
    validation : false,
    metadata   : {'Cache-Control': 'public, max-age=31536000'}
  }))
  .on('error', (error : Error) => { 
    reject(error) 
  })
  .on('finish', () => { 
    resolve(true)
  })
})