Google Drive API V3 (javascript) update file contents

Question

I want to update the contents of a Google doc using the Google Drive API V3 (javascript):

https://developers.google.com/drive/v3/reference/files/update

I\'m

Answer 1

I build gDriveSync.js library to sync with google drive using javascript v3 api https://github.com/vitogit/gDriveSync.js

You can check the sourcecode of what I did (https://github.com/vitogit/gDriveSync.js/blob/master/lib/drive.service.js) , basically is a 2 step process, first you create the file and then you update it.

  this.saveFile = function(file, done) {
    function addContent(fileId) {
      return gapi.client.request({
          path: '/upload/drive/v3/files/' + fileId,
          method: 'PATCH',
          params: {
            uploadType: 'media'
          },
          body: file.content
        })
    }
    var metadata = {
      mimeType: 'application/vnd.google-apps.document',
      name: file.name,
      fields: 'id'
    }
    if (file.parents) {
      metadata.parents = file.parents;
    }

    if (file.id) { //just update
      addContent(file.id).then(function(resp) {
        console.log('File just updated', resp.result);
        done(resp.result);
      })
    } else { //create and update
      gapi.client.drive.files.create({
        resource: metadata
      }).then(function(resp) {
        addContent(resp.result.id).then(function(resp) {
          console.log('created and added content', resp.result);
          done(resp.result);
        })
      });
    }
  }