How do I upload a string as a file to Google Drive?

Question

here's my problem :

I want to create a Google Sheets extension in which I basically extract data from a sheet in Google Sheets, that I modify using methods in node JS. Then, having the data that I modified in a string, I want to upload that string into the client's Drive, in a csv or xml file. Therefore I don't have a local file that I can use to upload the file, just a string variable. How do I upload that string ? Thanks a lot, that's my first app and I'm struggling a bit.

Code

const {google} = require ('googleapis'); 
const keys = require ('./keys.json'); 
const client = new google.auth.JWT( 
  keys.client_email, null, 
  keys.private_key,
  ['googleapis.com/auth/drive'],
  'https://www.googleapis.com/…' 
); 
client.authorize(function(err, tokens){ 
  if (err){ 
    console.log(err); 
    return 
  } else { 
    console.log('Connected'); 
    gsrun(client); 
  } 
}); 

async function gsrun(cl) { 
  const gsapi = google.sheets({version: 'v4', auth: cl}); 
}

Answer 1

You have to set your file's metadata and the data it will contain (it's important the MIME type for this case must be text/csv ) and the file's body will be a simple string. This code will help you taking into consideration you already did the OAuth process and have the string you want to insert:

module.exports.init =  async function (){
    // Before calling the API, build your own Drive service instance 
    // In the second argument, you must pass your own string message 
    const pro = await uploadSimpleString(drive, null);
    console.log(pro);
  
} 

uploadSimpleString = (drive, message) => {
  // Set file metadata and data
  message = message || 'This is a simple String nice to meet you';
  const fileMetadata = {'name': 'uploadSimpleStringt.csv'};
  const media = {
    mimeType: 'text/csv',
    body: message
  };
  // Return the Promise result after completing its task
  return new Promise((resolve, reject) => {
    try{
      // Call Files: create endpoint
      return drive.files.create({
        resource: fileMetadata,
        media: media,
        fields: 'id'
      },(err, results) => { 
        // Result from the call
        if(err) reject(`Drive error: ${err.message}`);
        resolve(results);
      })
    } catch (error){
      console.log(`There was a problem in the promise: ${error}`);
    }
  });
}

Notice

To test this code, run it in your CLI using this command:

node -e 'require("./index.js").init()'

Where index.js is your file's name and init() is your main function.

Docs

For more info, please check these links and also consider using the [google-drive-api] tag in that way, there are more chances to receive help because more people will be able to find your question.

• How to get Help
• Files: create
• G Suite documents and corresponding export MIME types