关于Google People API的people.get接口无法获取其他用户姓名、照片等信息的技术问询

Hey there, let's break down why you're hitting this roadblock and how to fix it! The core issue here is that the Google People API has built-in restrictions on accessing other users' data, and your current setup doesn't meet the requirements to pull full public/contact profile details.

1. Understand the Core Restrictions #

By default, the API only lets you fetch full details for the authenticated user (using people/me). To get data for other users, two critical pieces need to align:

• Your app has the right OAuth 2.0 scopes to access public or contact-specific user data
• The target user has the profile fields you want (like name, photo) set to public (or they’re in your authenticated account’s contact list)

2. Update Your OAuth Authorization Scopes #

Your current auth setup likely only includes basic scopes like profile or email—these only work for your own account. Add one of these scopes based on your needs:

• https://www.googleapis.com/auth/people.readonly: Grants access to public profile data of any Google user
• https://www.googleapis.com/auth/contacts.readonly: Grants access to full profile data of users in your authenticated account’s contact list

Example: Add Scopes in Flutter's GoogleSignIn #

final GoogleSignIn _googleSignIn = GoogleSignIn(
  scopes: [
    'email',
    'profile',
    'https://www.googleapis.com/auth/people.readonly', // Add this required scope
  ],
);

3. Verify Target User's Profile Visibility #

If you still don’t see fields like names after updating scopes, the target user probably has that field set to private. For example:

• A user might set their full name to "Only me" or "My contacts" in their Google Account settings
• In your sample response, only the photo is returned because that photo is marked as public, but the name is not

4. Double-Check Your Request Code #

Your existing code is structured correctly, but here’s a small tweak to make field requests clearer (parentheses are optional, but this format is more widely used):

Future<Person> getPersonDetails(String peopleId) async {
  final GoogleAuthClient googleAuthClient = await GoogleProvider.provideGoogleAuthClient();
  final PeopleServiceApi peopleServiceApi = peopleDataProvider.getPeopleApi(googleAuthClient);
  Person person = await peopleServiceApi.people
      .get(peopleId, personFields: 'names,photos,urls,emailAddresses');
  return person;
}

Key Takeaways #

• If you’re fetching contacts, use contacts.readonly and ensure the user is in your authenticated account’s contact list
• Public profile data is limited to what the user chooses to share publicly—you can’t access private fields no matter what scopes you use

内容的提问来源于stack exchange，提问作者hayashi