將 OAuth 2.0 用於網路伺服器應用程式

use Google\Client;

$client = new Client();

// Required, call the setAuthConfig function to load authorization credentials from
// client_secret.json file.
$client->setAuthConfig('client_secret.json');

// Required, to set the scope value, call the addScope function
$client->addScope([Google\Service\Drive::DRIVE_METADATA_READONLY, Google\Service\Calendar::CALENDAR_READONLY]);

// Required, call the setRedirectUri function to specify a valid redirect URI for the
// provided client_id
$client->setRedirectUri('http://' . $_SERVER['HTTP_HOST'] . '/oauth2callback.php');

// Recommended, offline access will give you both an access and refresh token so that
// your app can refresh the access token without user interaction.
$client->setAccessType('offline');

// Recommended, call the setState function. Using a state value can increase your assurance that
// an incoming connection is the result of an authentication request.
$client->setState($sample_passthrough_value);

// Optional, if your application knows which user is trying to authenticate, it can use this
// parameter to provide a hint to the Google Authentication Server.
$client->setLoginHint('hint@example.com');

// Optional, call the setPrompt function to set "consent" will prompt the user for consent
$client->setPrompt('consent');

// Optional, call the setIncludeGrantedScopes function with true to enable incremental
// authorization
$client->setIncludeGrantedScopes(true);

import google.oauth2.credentials
import google_auth_oauthlib.flow

# Required, call the from_client_secrets_file method to retrieve the client ID from a
# client_secret.json file. The client ID (from that file) and access scopes are required. (You can
# also use the from_client_config method, which passes the client configuration as it originally
# appeared in a client secrets file but doesn't access the file itself.)
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file('client_secret.json',
    scopes=['https://www.googleapis.com/auth/drive.metadata.readonly',
            'https://www.googleapis.com/auth/calendar.readonly'])

# Required, indicate where the API server will redirect the user after the user completes
# the authorization flow. The redirect URI is required. The value must exactly
# match one of the authorized redirect URIs for the OAuth 2.0 client, which you
# configured in the API Console. If this value doesn't match an authorized URI,
# you will get a 'redirect_uri_mismatch' error.
flow.redirect_uri = 'https://www.example.com/oauth2callback'

# Generate URL for request to Google's OAuth 2.0 server.
# Use kwargs to set optional request parameters.
authorization_url, state = flow.authorization_url(
    # Recommended, enable offline access so that you can refresh an access token without
    # re-prompting the user for permission. Recommended for web server apps.
    access_type='offline',
    # Optional, enable incremental authorization. Recommended as a best practice.
    include_granted_scopes='true',
    # Optional, if your application knows which user is trying to authenticate, it can use this
    # parameter to provide a hint to the Google Authentication Server.
    login_hint='hint@example.com',
    # Optional, set prompt to 'consent' will prompt the user for consent
    prompt='consent')

require 'googleauth'
require 'googleauth/web_user_authorizer'
require 'googleauth/stores/redis_token_store'

require 'google/apis/drive_v3'
require 'google/apis/calendar_v3'

# Required, call the from_file method to retrieve the client ID from a
# client_secret.json file.
client_id = Google::Auth::ClientId.from_file('/path/to/client_secret.json')

# Required, scope value 
# Access scopes for two non-Sign-In scopes: Read-only Drive activity and Google Calendar.
scope = ['Google::Apis::DriveV3::AUTH_DRIVE_METADATA_READONLY',
         'Google::Apis::CalendarV3::AUTH_CALENDAR_READONLY']

# Required, Authorizers require a storage instance to manage long term persistence of
# access and refresh tokens.
token_store = Google::Auth::Stores::RedisTokenStore.new(redis: Redis.new)

# Required, indicate where the API server will redirect the user after the user completes
# the authorization flow. The redirect URI is required. The value must exactly
# match one of the authorized redirect URIs for the OAuth 2.0 client, which you
# configured in the API Console. If this value doesn't match an authorized URI,
# you will get a 'redirect_uri_mismatch' error.
callback_uri = '/oauth2callback'

# To use OAuth2 authentication, we need access to a CLIENT_ID, CLIENT_SECRET, AND REDIRECT_URI
# from the client_secret.json file. To get these credentials for your application, visit
# https://console.cloud.google.com/apis/credentials.
authorizer = Google::Auth::WebUserAuthorizer.new(client_id, scope,
                                                token_store, callback_uri)

const {google} = require('googleapis');
const crypto = require('crypto');
const express = require('express');
const session = require('express-session');

/**
 * To use OAuth2 authentication, we need access to a CLIENT_ID, CLIENT_SECRET, AND REDIRECT_URI
 * from the client_secret.json file. To get these credentials for your application, visit
 * https://console.cloud.google.com/apis/credentials.
 */
const oauth2Client = new google.auth.OAuth2(
  YOUR_CLIENT_ID,
  YOUR_CLIENT_SECRET,
  YOUR_REDIRECT_URL
);

// Access scopes for two non-Sign-In scopes: Read-only Drive activity and Google Calendar.
const scopes = [
  'https://www.googleapis.com/auth/drive.metadata.readonly',
  'https://www.googleapis.com/auth/calendar.readonly'
];

// Generate a secure random state value.
const state = crypto.randomBytes(32).toString('hex');

// Store state in the session
req.session.state = state;

// Generate a url that asks permissions for the Drive activity and Google Calendar scope
const authorizationUrl = oauth2Client.generateAuthUrl({
  // 'online' (default) or 'offline' (gets refresh_token)
  access_type: 'offline',
  /** Pass in the scopes array defined above.
    * Alternatively, if only one scope is needed, you can pass a scope URL as a string */
  scope: scopes,
  // Enable incremental authorization. Recommended as a best practice.
  include_granted_scopes: true,
  // Include the state parameter to reduce the risk of CSRF attacks.
  state: state
});

return flask.redirect(authorization_url)

https://accounts.google.com/o/oauth2/v2/auth?
 scope=https%3A//www.googleapis.com/auth/drive.metadata.readonly%20https%3A//www.googleapis.com/auth/calendar.readonly&
 access_type=offline&
 include_granted_scopes=true&
 response_type=code&
 state=state_parameter_passthrough_value&
 redirect_uri=https%3A//developers.google.com/oauthplayground&
 client_id=client_id

$access_token = $client->fetchAccessTokenWithAuthCode($_GET['code']);

state = flask.session['state']
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
    'client_secret.json',
    scopes=['https://www.googleapis.com/auth/drive.metadata.readonly'],
    state=state)
flow.redirect_uri = flask.url_for('oauth2callback', _external=True)

authorization_response = flask.request.url
flow.fetch_token(authorization_response=authorization_response)

# Store the credentials in browser session storage, but for security: client_id, client_secret,
# and token_uri are instead stored only on the backend server.
credentials = flow.credentials
flask.session['credentials'] = {
    'token': credentials.token,
    'refresh_token': credentials.refresh_token,
    'granted_scopes': credentials.granted_scopes}

  target_url = Google::Auth::WebUserAuthorizer.handle_auth_callback_deferred(request)
  redirect target_url

const url = require('url');

// Receive the callback from Google's OAuth 2.0 server.
app.get('/oauth2callback', async (req, res)