Facebook图形API无法获取用户公开个人资料

Question

I've implemented social authentication in my application, and I get the accesstoken successfully. But when I use that access token to get the user's public profile, I get only the user's ID and the user's name. I can't get the other properties of the user like the user's profile picture.

when I try this:

Json = await httpClient.GetStringAsync($"https://graph.facebook.com/v5.0/{userWithOnlyId.Id}?access_token={accessToken}");

I get only the user's id and name.

when I do this as stated in this facebook doc :

await httpClient.GetStringAsync(
            $"https://graph.facebook.com/me?fields=profile_pic&access_token={accessToken}");

I get a 403 forbidden error.

Is there something I did wrong ? I've tried several things I found here on stackoverflow but up till now I have no solution.

Answer 1

There is an example(section: Retrieving a Person's Profile):

https://graph.facebook.com/<PSID>?fields=first_name,last_name,profile_pic&access_token=<PAGE_ACCESS_TOKEN>

Looks like you need to provide a PSID

ASID(App-scoped ID) - it's a user-id that is unique for each app.

It means that this user will have different ASID for each app. I think that you have only one app.

To get a Page-scoped ID from an App-scoped ID, send a POST request to the /pages_id_mapping root node