nodejs google drive api file download error with readablestream object - node.js

Question

I'm trying to implement a function for downloading a file from the google drive using google drive api V3.
Below is my code.
service.files.get({
auth: this.oauth2Client,
fileId: fileId,
alt: 'media'
}, {responseType: "stream"}, function (err, response) {
console.log(response);
response.data
.on('end',() => {
console.log('Done');
})
.on('error', (err) => {
console.log('Error during download', err);
})
.on('data', d=> {
progress += d.length;
if (process.stdout.isTTY) {
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write('Download ${progress} bytes');
}
})
.pipe(dest);
})
When I run the code, I get this error.
response.data.on is not a function
Not just the on function, but the pipe function doesn't work either.
I already checked that response.data is the object of Readablestream.
Any ideas?
UPDATES
Below is the full code for GoogleDriveSyn class.
The getAllFilesInFolder function works fine.
const path = require('path')
const {google} = require('googleapis');
const fs = require('fs');
const service = google.drive('v3');
class GoogleDriveSyn {
constructor(auth) {
var apiKeys = JSON.parse(fs.readFileSync('config.json'));
this.oauth2Client = new google.auth.OAuth2(
apiKeys['CLIENT_ID'],
apiKeys['SECRET_ID'],
"http://localhost:8080"
);
this.oauth2Client.credentials = auth;
this.directory = localStorage.getItem('directory');
}
getAllFilesInFolder(folderId) {
var query = '"' + folderId + '"' + ' in parents and mimeType!="application/vnd.google-apps.folder"';
service.files.list({
auth: this.oauth2Client,
q: query,
pageSize: 50,
fields: 'nextPageToken, files(id, name, modifiedTime, kind, createdTime, thumbnailLink, mimeType, size, webContentLink)'
}, function(err, response) {
if (err) {
console.log('The API returned an error: ' + err);
return;
}
console.log(response);
return response
})
}
downloadFile(fileId, filePath, fileName) {
var fullPath = path.join(this.directory, filePath, fileName);
var dest = fs.createWriteStream(fullPath);
let progress = 0;
service.files.get({
auth: this.oauth2Client,
fileId: fileId,
alt: 'media'
}, {responseType: "stream"}, function (err, response) {
console.log(response);
response.data
.on('end',() => {
console.log('Done');
})
.on('error', (err) => {
console.log('Error during download', err);
})
.on('data', d=> {
progress += d.length;
if (process.stdout.isTTY) {
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write('Download ${progress} bytes');
}
})
.pipe(dest);
})
}
}
module.exports = GoogleDriveSyn;
Also, below is the log of response inside downloadFile function.
{config: {…}, data: ReadableStream, headers: {…}, status: 200, statusText: ""}
config: {url: "https://www.googleapis.com/drive/v3/files/1zcxy0wWsPuWINMY8FP_bjR4nrnj6t8eD?alt=media", method: "GET", responseType: "stream", headers: {…}, paramsSerializer: ƒ, …}
data: ReadableStream {locked: false}
headers: {alt-svc: "h3-29=":443"; ma=2592000,h3-27=":443"; ma=2592000,…3"; ma=2592000,quic=":443"; ma=2592000; v="46,43"", cache-control: "private, max-age=0, must-revalidate", content-disposition: "attachment", content-length: "12", content-type: "text/plain", …}
status: 200
statusText: ""
__proto__: Object

Answer 1

I believe your goal and situation as follows.
You want to download a text file from the Google Drive.
Your script for authorizing works fine. So this.oauth2Client can be used for downloading the file.
Modification points:
In my environment, I confirmed that your script worked. But in your question, you say the error of response.data.on is not a function occurs. So in this modification, downloadFile was modified as follows.
At first, please confirm the version of googleapis for Node.js you are using. In this case, please use the latest version of googleapis for Node.js. In the current stage, the latest version is googleapis#55.0.0.
If you use the old one, I thought that the reason of your issue might be this.
In your script, 'Download ${progress} bytes' is not correct. In this case, please use it as the template literal. By this, the progress information can be seen.
Modified script:
downloadFile(fileId, filePath, fileName) {
var fullPath = path.join(this.directory, filePath, fileName);
var dest = fs.createWriteStream(fullPath);
let progress = 0;
return drive.files
.get(
{ auth: this.oauth2Client, fileId: fileId, alt: "media" },
{ responseType: "stream" }
)
.then((response) => {
return new Promise((resolve, reject) => {
response.data
.on("end", () => {
resolve("\nDone");
})
.on("error", (err) => {
reject(err);
})
.on("data", (d) => {
progress += d.length;
if (process.stdout.isTTY) {
process.stdout.clearLine();
process.stdout.cursorTo(0);
process.stdout.write(`Download ${progress} bytes`);
}
})
.pipe(dest);
});
});
}
Reference:
Drive v3 API Samples
You can see the sample script at download.js.