Google drive API downloading file. Error: Cannot read property 'data' of undefined

[Shivani Shinde]

Hi,

I have followed the official docs for nodejs with Drive API v3.

I have following code for downloading files from google drive. 

function downloadFile(auth)

{

     const drive = google.drive({ version: 'v3', auth });

    //    drive.files.get({ fileId: fileId, fields: '*' }, (err, res) => {

    //        if (err) return console.log('The API returned an error: ' + err);

    //        console.log(res.data);

    //    });

         

    var fileId = '1RDrrFGV2fM7jvnxGFileId';

    var dest = fs.createWriteStream('./samples');

    drive.files.get({fileId: fileId, alt: 'media'}, {responseType: 'stream'},

    function(err, res){

        res.data

        .on('end', () => {

            console.log('Done');

        })

        .on('error', err => {

            console.log('Error', err);

        })

        .pipe(dest);

    }

    );

}

But I am not able to understand why is following error occurring:

UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'data' of undefined

    at /home/sshinde/workspace/node-sample-apps-script/index.js:157:13

    at process._tickCallback (internal/process/next_tick.js:68:7)

(node:546) 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:546) [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.

Googling the error isn't helping.

Any help will be appreciated!

[Yasir Karam]

drive.files.get(
        {fileId: fileId, alt: 'media',}, 
        {responseType: 'stream'}, (err, { data }) => {
            if (err) {
                returnData.push(["ERR"]);
                returnData.push("" + err);
            } else {
                data.pipe(file);
                returnData.push("Downloaded");
            }
            callback(returnData);
        });

Yasir Karam about.me/karamyasir

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[Shivani Shinde]

Hi Yasir. Thank you for resonding. 

Although I get following error for line :

      {responseType: 'stream'}, (err, { data }) => {

Error:

(node:7580) UnhandledPromiseRejectionWarning: TypeError: Cannot destructure property `data` of 'undefined' or 'null'.

On Sunday, November 24, 2019 at 5:16:07 PM UTC+5:30, Yasir Karam wrote:

drive.files.get(
        {fileId: fileId, alt: 'media',}, 
        {responseType: 'stream'}, (err, { data }) => {
            if (err) {
                returnData.push(["ERR"]);
                returnData.push("" + err);
            } else {
                data.pipe(file);
                returnData.push("Downloaded");
            }
            callback(returnData);
        });

Yasir Karam about.me/karamyasir

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[Yasir Karam]

function download(fileId, name, done) {
        const dest = fs.createWriteStream(name + '.csv');
        drive.files.export({
            fileId: fileId,
            mimeType: 'text/csv'
        }, {
            responseType: 'stream'
        },function(err, response){
            if(err)return done(err);
            
            response.data.on('error', err => {
                done(err);
            }).on('end', ()=>{
                done();
            })
            .pipe(dest);
       });
}

is important the responseType: "stream" to have a stream in response.data.
options are passed to axios.request, here you can find all options

Yasir Karam about.me/karamyasir

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[Yasir Karam]

https://medium.com/@humadvii/downloading-files-from-google-drive-using-node-js-3704c142a5f6

Yasir Karam about.me/karamyasir