(node:133220) UnhandledPromiseRejectionWarning: Error: [object Object] at Gaxios.<anonymous> …at Generator.next (<anonymous>)

[aminasya]

Environment details

• OS: Windows 10
• Node.js version: v10.14.1
• npm version: 6.4.1
• googleapis version: 38

Steps to reproduce

1. node .\download.js 1Z9c119EzgR4Dd5Woi-C34Xl6Qu_87FugdlwwYRJhzlE

This code produces following error:

writing to C:\Users\ASHOT_~1\AppData\Local\Temp\a9b522b9-0582-4dc3-b73c-0b9593892ff3
(node:143084) UnhandledPromiseRejectionWarning: Error: [object Object]
    at Gaxios.<anonymous> (C:\Users\Ashot_Minasyan\Downloads\google-api-nodejs-client-master\google-api-nodejs-client-master\node_modules\gaxios\build\src\gaxios.js:72:27)
    at Generator.next (<anonymous>)
    at fulfilled (C:\Users\Ashot_Minasyan\Downloads\google-api-nodejs-client-master\google-api-nodejs-client-master\node_modules\gaxios\build\src\gaxios.js:16:58)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:143084) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without
a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:143084) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Running quickstart.js works ok so authentication is not a problem I think.
Here is stackoverflow question https://stackoverflow.com/questions/55326387/node133220-unhandledpromiserejectionwarning-error-object-object-at-gaxios

[JustinBeckwith]

Greetings! Can you share the code you're using?

[aminasya]

I just have run https://github.com/googleapis/google-api-nodejs-client/blob/master/samples/drive/download.js script

[aminasya]

This actually worked with another file (normal pdf). The file which cause this error is template. Looks like it needs additional treating.

[JustinBeckwith]

Thanks! Can you share the type of file you're downloading?

[bcoe]

@aminasya 👋 are you still bumping into issues? what was the extension of the file you were attempting to download.

[aminasyaEpam]

The file that I tried do download was google template document. In order to download it the type should be specified. I managed to do it using api.epxort method specifying 'application/pdf' as type.
So the error message came when I tried to call get method with a template document.

[bcoe]

@aminasya (CC: @aminasyaEpam are you the same person?), if I understand you are able to download templates as long as you specify the mimeType and use the export method rather than get method?

[JustinBeckwith]

Greetings! We haven't seen any action on this issue for a while, so we're going to go ahead and close it out. If this is still a problem... please do let us know!

[NetajiBandi]

I was just able to reproduce this bug and fix it as well.

I was mistaken by thinking that the issue is having alt: 'media' under params of drive.files.get
But for me issue turned out to be an insufficient permissions.

I was using the token.json file which got saved before all the needed scopes were defined.
I initially had only below two scopes,

['https://www.googleapis.com/auth/drive.metadata',
'https://www.googleapis.com/auth/drive.metadata.readonly']

But after adding all the required scopes (required for download) as below,

const SCOPES = [
  'https://www.googleapis.com/auth/drive',
  'https://www.googleapis.com/auth/drive.appdata',
  'https://www.googleapis.com/auth/drive.file',
  'https://www.googleapis.com/auth/drive.metadata',
  'https://www.googleapis.com/auth/drive.metadata.readonly',
  'https://www.googleapis.com/auth/drive.photos.readonly',
  'https://www.googleapis.com/auth/drive.readonly',
];

And deleted the old token.json file. This created a new token.json file, and then the download started working.