B4X

Get Google Account Info from OAuth2 Access Token

See more Google APIs Examples

In the Google OAuth2 authorization flow, an application can know the email address of the Google account used to authorize access by requesting and processing user information from the Google UserInfo endpoint after obtaining an access token. B4X

Dim success As Boolean = False

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim http As ChilkatHttp
http.Initialize("http")

'  Implements the following CURL command:

'  curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://www.googleapis.com/oauth2/v3/userinfo

'  Use the following online tool to generate HTTP code from a CURL command
'  Convert a cURL Command to HTTP Source Code

'  Adds the "Authorization: Bearer YOUR_ACCESS_TOKEN" header.
http.AuthToken = "YOUR_ACCESS_TOKEN"

Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/userinfo", sbResponseBody)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim jResp As ChilkatJsonObject
jResp.Initialize
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Log("Response Body:")
Log(jResp.Emit)

Dim respStatusCode As Int = http.LastStatus
Log("Response Status Code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Header:")
    Log(http.LastHeader)
    Log("Failed.")
    Return
End If


'  Sample JSON response:
'  (Sample code for parsing the JSON response is shown below)

'  {
'    "sub": "112233445678901234567",
'    "name": "John Doe",
'    "given_name": "John",
'    "family_name": "Doe",
'    "profile": "https://plus.google.com/112233445678901234567",
'    "picture": "https://lh3.googleusercontent.com/a-/AOh14GiU-EXAMPLE",
'    "email": "johndoe@example.com",
'    "email_verified": true,
'    "locale": "en"
'  }

'  Sample code for parsing the JSON response...
'  Use the following online tool to generate parsing code from sample JSON:
'  Generate Parsing Code from JSON

Dim v_sub As String = jResp.StringOf("sub")
Dim name As String = jResp.StringOf("name")
Dim given_name As String = jResp.StringOf("given_name")
Dim family_name As String = jResp.StringOf("family_name")
Dim profile As String = jResp.StringOf("profile")
Dim picture As String = jResp.StringOf("picture")
Dim email As String = jResp.StringOf("email")
Dim email_verified As Boolean = jResp.BoolOf("email_verified")
Dim locale As String = jResp.StringOf("locale")