How to verify user ios sing in with google plus account ? server side

Question

I build a login button in my ios app . i have followed this documentation .

the login at my ios app work very fine. and i succeed to receive the auth object :

{accessToken="***********", refreshToken="*****", code="*******", expirationDate="2015-07-27 11:00:07 +0000"}

also i succeed to get the one time auth Code

[GPPSignIn sharedInstance].homeServerAuthorizationCode;

now what should i do. according to the document, i should send the homeServerAuthorizationCode to my server. then exchange it with access token. but it doesn't mention how i could do that.

I found this article https://developers.google.com/identity/sign-in/web/server-side-flow but it just describe How to get access token . it doesn't show How to do that !

Also after i succeed to retrieve the token. How to call the google plus api. to retrieve user profile for example ?

Answer 1

First You have to install the Google client package in your project

"google/apiclient": "^2.0.0@RC"

Then from your IOS authorized array, you can find a "server_code":"**********" . From this server code you can get new authenticate result (acees_token,refresh_token,expire etc) from server side.Please go through the below code

 $redirect_uri = 'http://******/gplusresponse';
  $client = new Google_Client();
 $client->setClientId('YOUR_CLIENT_ID');
 $client->setClientSecret('YOUR_CLIENT_SECRET');
 $client->setRedirectUri($redirect_uri);
 $client->setAccessType("offline");
 $client->setScopes(array(
     'https://www.googleapis.com/auth/plus.me',
     'https://www.googleapis.com/auth/plus.stream.write'    
 ));

 $token=$client->authenticate(YOUR_SERVER_CODE);
print_r($token);

It will display a new token result array

{ "access_token": "*******************", "token_type": "Bearer", "expires_in": 3600, "refresh_token": "***************", "id_token": "***************" }

Now you can verify the user by giving the access token in the url en point with method as GET

https://www.googleapis.com/plus/v1/people/me/?access_token=YOUR_NEW_ACCESS_TOKEN

The result will displays the authorized user profile.