Node.js Quickstart

Complete the steps described in the rest of this page, and in about five minutes you'll have a simple Node.js command-line application that makes requests to the G Suite Reseller API.

Prerequisites

To run this quickstart, you'll need:

  • Node.js & npm installed.
  • A Google Reseller domain instance.
  • A fully executed G Suite partner agreement.

Step 1: Turn on the G Suite Reseller API

  1. Use this wizard to create or select a project in the Google Developers Console and automatically turn on the API. Click Continue, then Go to credentials.
  2. On the Add credentials to your project page, click the Cancel button.
  3. At the top of the page, select the OAuth consent screen tab. Select an Email address, enter a Product name if not already set, and click the Save button.
  4. Select the Credentials tab, click the Create credentials button and select OAuth client ID.
  5. Select the application type Other, enter the name "G Suite Reseller API Quickstart", and click the Create button.
  6. Click OK to dismiss the resulting dialog.
  7. Click the file_download (Download JSON) button to the right of the client ID.
  8. Move this file to your working directory and rename it client_secret.json.

Step 2: Install the client library

Run the following commands to install the libraries using npm:

npm install googleapis@27 --save

Step 3: Set up the sample

Create a file named quickstart.js in your working directory and copy in the following code:

const fs = require('fs');
const readline = require('readline');
const {google} = require('googleapis');
const GoogleAuth = require('google-auth-library');

// If modifying these scopes, delete your previously saved credentials
// at ~/.credentials/reseller-nodejs-quickstart.json
const SCOPES = ['https://www.googleapis.com/auth/apps.order'];
const TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
    process.env.USERPROFILE) + '/.credentials/';
const TOKEN_PATH = TOKEN_DIR + 'reseller-nodejs-quickstart.json';

// Load client secrets from a local file.
fs.readFile('client_secret.json', function processClientSecrets(err, content) {
  if (err) {
    console.log('Error loading client secret file: ' + err);
    return;
  }
  // Authorize a client with the loaded credentials, then call the
  // G Suite Reseller API.
  authorize(JSON.parse(content), listSubscriptions);
});

/**
 * Create an OAuth2 client with the given credentials, and then execute the
 * given callback function.
 *
 * @param {Object} credentials The authorization client credentials.
 * @param {function} callback The callback to call with the authorized client.
 */
function authorize(credentials, callback) {
  const clientSecret = credentials.installed.client_secret;
  const clientId = credentials.installed.client_id;
  const redirectUrl = credentials.installed.redirect_uris[0];
  const auth = new GoogleAuth();
  let oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl);

  // Check if we have previously stored a token.
  fs.readFile(TOKEN_PATH, function(err, token) {
    if (err) {
      getNewToken(oauth2Client, callback);
    } else {
      oauth2Client.credentials = JSON.parse(token);
      callback(oauth2Client);
    }
  });
}

/**
 * Get and store new token after prompting for user authorization, and then
 * execute the given callback with the authorized OAuth2 client.
 *
 * @param {google.auth.OAuth2} oauth2Client The OAuth2 client to get token for.
 * @param {getEventsCallback} callback The callback to call with the authorized
 *     client.
 */
function getNewToken(oauth2Client, callback) {
  const authUrl = oauth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: SCOPES,
  });
  console.log('Authorize this app by visiting this url: ', authUrl);
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });
  rl.question('Enter the code from that page here: ', function(code) {
    rl.close();
    oauth2Client.getToken(code, function(err, token) {
      if (err) {
        console.log('Error while trying to retrieve access token', err);
        return;
      }
      oauth2Client.credentials = token;
      storeToken(token);
      callback(oauth2Client);
    });
  });
}

/**
 * Store token to disk be used in later program executions.
 *
 * @param {Object} token The token to store to disk.
 */
function storeToken(token) {
  try {
    fs.mkdirSync(TOKEN_DIR);
  } catch (err) {
    if (err.code != 'EEXIST') {
      throw err;
    }
  }
  fs.writeFile(TOKEN_PATH, JSON.stringify(token));
  console.log('Token stored to ' + TOKEN_PATH);
}

/**
 * Lists the first 10 subscriptions you manage.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listSubscriptions(auth) {
  const service = google.reseller('v1');
  service.subscriptions.list({
    auth: auth,
    maxResults: 10,
  }, function(err, response) {
    if (err) {
      console.log('The API returned an error: ' + err);
      return;
    }
    const subscriptions = response.subscriptions;
    if (subscriptions.length == 0) {
      console.log('No subscriptions found.');
    } else {
      console.log('Subscriptions:');
      for (let i = 0; i < subscriptions.length; i++) {
        const subscription = subscriptions[i];
        console.log('%s (%s, %s)', subscription.customerId, subscription.skuId,
            subscription.plan.planName);
      }
    }
  });
}

Step 4: Run the sample

Run the sample using the following command:

node quickstart.js

The first time you run the sample, it will prompt you to authorize access:

  1. Browse to the provided URL in your web browser.

    If you are not already logged into your Google account, you will be prompted to log in. If you are logged into multiple Google accounts, you will be asked to select one account to use for the authorization.

  2. Click the Accept button.
  3. Copy the code you're given, paste it into the command-line prompt, and press Enter.

Notes

  • Authorization information is stored on the file system, so subsequent executions will not prompt for authorization.
  • The authorization flow in this example is designed for a command line application. For information on how to perform authorization in other contexts, see the Authorizing and Authenticating. section of the library's README.

Further reading

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G Suite Reseller API
G Suite Reseller API