Don't know How to save .docx file from google drive

I have tried many methods - node.js write Buffer, Streams etc.

    var xhr = new _XMLHttpRequest();
//children is response of `get` file
    xhr.open('GET', children.downloadUrl);
    xhr.setRequestHeader('Authorization', 'Bearer ' + _accessToken);
    xhr.onload = function() {
        fs.writeFile(children.title, xhr.responseText)
    });

Content of xhr.responseText is something like that ��▬h��↕E6M��~��3�3∟�9�� � �►��/2�:���♂�4��]�♀I�R���► $SB6Q���c↔��H�=;+ ���►q�3Tdכ��@!T��hEl_�|�I�↨��h(�^:▬�[h̓D♠��f���♠*���ݾ��M→ �1⌂♦"N�↑�o�]�7U$��A6����♠�W��k`�f▬♫��K�Z�^‼�0{<Z�▼�]F�����

                             ���J♥A♀��♣�a�}7�

"���H�w"�♥���☺w♫̤ھ�� �P�^����O֛���;�<♠�aYՠ؛`G�kxm��PY�[��g Gΰino�/<���<�1��ⳆA$>"f3��\�ȾT��∟I S�������W♥����Y

Please help me to know what is the format of the data I am getting from Drive Api and write it in which format so that I got a complete .docx file

[davestevens]

Here is an example of how I am downloading files: https://gist.github.com/davestevens/6f376f220cc31b4a25cd

An example for just a single file:

var google = require("googleapis"),
    drive = google.drive("v2"),
    fs = require("fs");

// For configuring your Client
var config = {
  "client_id": "client_id",
  "client_secret": "client_secret",
  "scope": "scope",
  "redirect_url": "redirect_rul",
  "tokens": {
    "access_token": "access_token",
    "token_type": "Bearer",
    "id_token": "id_token",
    "refresh_token": "refresh_token",
    "expiry_date": "expiry_date"
  }
};

var client = new google.auth.OAuth2(
  config.client_id,
  config.client_secret,
  config.redirect_url
);
client.setCredentials(config.tokens);

var file = fs.createWriteStream("./downloadedFile"),
    fileId = "FILEID"; // The Id of the file you want to download
drive.files.get({ auth: client, fileId: fileId, alt: "media" }).pipe(file);

[robertrossmann]

Just posted an answer on SO. To summarise, XMLHttpRequest does not support binary downloads; you need to use something else that does.