(Visual Basic 6.0) 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim http As New ChilkatHttp
Dim success As Long

' 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 New ChilkatStringBuilder
success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/userinfo",sbResponseBody)
If (success = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim jResp As New ChilkatJsonObject
success = jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = 0

Debug.Print "Response Body:"
Debug.Print jResp.Emit()

Dim respStatusCode As Long
respStatusCode = http.LastStatus
Debug.Print "Response Status Code = " & respStatusCode
If (respStatusCode >= 400) Then
    Debug.Print "Response Header:"
    Debug.Print http.LastHeader
    Debug.Print "Failed."
    Exit Sub
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
v_sub = jResp.StringOf("sub")
Dim name As String
name = jResp.StringOf("name")
Dim given_name As String
given_name = jResp.StringOf("given_name")
Dim family_name As String
family_name = jResp.StringOf("family_name")
Dim profile As String
profile = jResp.StringOf("profile")
Dim picture As String
picture = jResp.StringOf("picture")
Dim email As String
email = jResp.StringOf("email")
Dim email_verified As Long
email_verified = jResp.BoolOf("email_verified")
Dim locale As String
locale = jResp.StringOf("locale")