Google Chat 앱의 세부적인 OAuth 권한 관리하기

/**
* Responds to a MESSAGE event in Google Chat.
* Checks for required permissions and if missing asks for them.
*
* @param {Object} event the event object from Chat
* @return {Object} JSON response
*/
function onMessage(event) {
  // Check if the script has the necessary permissions.
  // In this example, the script checks for the "calendar.events" scope.
  var requiredScopes = ['https://www.googleapis.com/auth/calendar.events'];
  var authInfo = ScriptApp.getAuthorizationInfo(ScriptApp.AuthMode.FULL, requiredScopes);

  // If permissions are missing, return a message with the authorization URL.
  if (authInfo.getAuthorizationStatus() === ScriptApp.AuthorizationStatus.REQUIRED) {
    var authUrl = authInfo.getAuthorizationUrl();
    return {
      "text": "This action requires authorization. Please <" + authUrl + "|click here to authorize>.",
      "privateMessageViewer": {
        "name": event.user.name
      }
    };
  }

  // Permission granted; proceed with the application logic.
  // ...
}

// 1. List authorized scopes.
const fs = require('fs');
const tokens = JSON.parse(fs.readFileSync('token.json'));
const grantedScopes = tokens.scope.split(' ');

// 2. Detect missing scopes.
const requiredScopes = ['https://www.googleapis.com/auth/chat.messages'];
const missingScopes = requiredScopes.filter(scope => !grantedScopes.includes(scope));

if (missingScopes.length > 0) {
  // 3. Request missing scopes.
  const authUrl = oauth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: missingScopes,
    include_granted_scopes: true
  });
  res.redirect(authUrl);
}

// To request all scopes instead of just the missing ones:
const allScopesAuthUrl = oauth2Client.generateAuthUrl({
  access_type: 'offline',
  scope: requiredScopes,
  include_granted_scopes: true
});

from flask import redirect
from google.oauth2.credentials import Credentials

# 1. List authorized scopes.
credentials = Credentials.from_authorized_user_file('token.json')
granted_scopes = set(credentials.scopes)

# 2. Detect missing scopes.
required_scopes = {'https://www.googleapis.com/auth/chat.messages'}
missing_scopes = required_scopes - granted_scopes

if missing_scopes:
    # 3. Request missing scopes.
    flow.scope = list(missing_scopes)
    auth_url, _ = flow.authorization_url(
        access_type='offline',
        include_granted_scopes=True
    )
    return redirect(auth_url)

# To request all scopes instead of just the missing ones:
flow.scope = list(required_scopes)
all_scopes_auth_url, _ = flow.authorization_url(
    access_type='offline',
    include_granted_scopes='true'
)

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeRequestUrl;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

// 1. List authorized scopes.
// The "user" string is the user ID for which to load credentials.
Credential credential = flow.loadCredential("user");
Collection<String> grantedScopes = credential.getScopes();

// 2. Detect missing scopes.
// The `requiredScopes` variable contains a list of the OAuth scopes
// that your app requires to function. Define this variable with the
// scopes needed by your application.
List<String> requiredScopes = Arrays.asList("https://www.googleapis.com/auth/chat.messages");
List<String> missingScopes = new ArrayList<>();
for (String scope : requiredScopes) {
  if (!grantedScopes.contains(scope)) {
    missingScopes.add(scope);
  }
}

if (!missingScopes.isEmpty()) {
  // 3. Request missing scopes.
  GoogleAuthorizationCodeRequestUrl urlBuilder = new GoogleAuthorizationCodeRequestUrl(
      clientId, redirectUri, missingScopes)
      .setAccessType("offline")
      .set("include_granted_scopes", "true");
  String authUrl = urlBuilder.build();
  response.sendRedirect(authUrl);
}

// To request all scopes instead of just the missing ones:
GoogleAuthorizationCodeRequestUrl allScopesUrlBuilder = new GoogleAuthorizationCodeRequestUrl(
    clientId, redirectUri, requiredScopes)
    .setAccessType("offline")
    .set("include_granted_scopes", "true");
String allScopesAuthUrl = allScopesUrlBuilder.build();