Upload a file to Google Cloud, in a specific directory

If accessing from the same project projectId , keyFilename,.. not required,I use the below code for both upload and download , it works fine.

// Imports the Google Cloud client library
const Storage = require('@google-cloud/storage');
const storage = new Storage();
var destFilename = "./test";
var bucketName = 'cloudtesla';
var srcFilename = 'test';

  const options = {
    destination: destFilename,
  };


//upload file
console.log("upload Started");
storage.bucket(bucketName).upload(srcFilename, {}, (err, file) => {

        if(!err)
        console.log("upload Completed");
        else
        console.log(err);
});


//Download file
console.log("Download Started");
  storage
    .bucket(bucketName)
    .file(srcFilename)
    .download(options)
    .then(() => {
      console.log("Download Completed");
    })
    .catch(err => {
      console.error('ERROR:', err);
    });

Here you go...

const options = {
  destination: 'folder/new-image.png',
  resumable: true,
  validation: 'crc32c',
  metadata: {
    metadata: {
      event: 'Fall trip to the zoo'
    }
  }
};

bucket.upload('local-image.png', options, function(err, file) {
  // Your bucket now contains:
  // - "new-image.png" (with the contents of `local-image.png')

  // `file` is an instance of a File object that refers to your new file.
});

bucket.upload("1.jpg", { destination: "YOUR_FOLDER_NAME_HERE/1.jpg" }, (err, file) => {
    //Do something...
});

This will put 1.jpg in the YOUR_FOLDER_NAME_HERE-folder.

Here is the documentation. By the way, gcloud is deprecated and you should use google-cloud instead.

UPDATE 2020

according to google documentation:

const { Storage } = require('@google-cloud/storage');
const storage = new Storage()
const bucket = storage.bucket('YOUR_GCLOUD_STORAGE_BUCKET')
const blob = bucket.file('youFolder/' + 'youFileName.jpg')

const blobStream = blob.createWriteStream({
    resumable: false,
    gzip: true,
    public: true
})

blobStream.on('error', (err) => {
    console.log('Error blobStream: ',err)
});

blobStream.on('finish', () => {
// The public URL can be used to directly access the file via HTTP.
    const publicUrl = ('https://storage.googleapis.com/'+ bucket.name + '/' + blob.name)
    res.status(200).send(publicUrl);
});

blobStream.end(req.file.buffer)//req.file is your original file