(DataFlex) 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

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoHttp
    Boolean iSuccess
    Variant vSbResponseBody
    Handle hoSbResponseBody
    Handle hoJResp
    Integer iRespStatusCode
    String sV_sub
    String sName
    String sGiven_name
    String sFamily_name
    String sProfile
    String sPicture
    String sEmail
    Boolean iEmail_verified
    String sLocale
    String sTemp1

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

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    // 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.
    Set ComAuthToken Of hoHttp To "YOUR_ACCESS_TOKEN"

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbResponseBody
    If (Not(IsComObjectCreated(hoSbResponseBody))) Begin
        Send CreateComObject of hoSbResponseBody
    End
    Get pvComObject of hoSbResponseBody to vSbResponseBody
    Get ComQuickGetSb Of hoHttp "https://www.googleapis.com/oauth2/v3/userinfo" vSbResponseBody To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJResp
    If (Not(IsComObjectCreated(hoJResp))) Begin
        Send CreateComObject of hoJResp
    End
    Get pvComObject of hoSbResponseBody to vSbResponseBody
    Get ComLoadSb Of hoJResp vSbResponseBody To iSuccess
    Set ComEmitCompact Of hoJResp To False

    Showln "Response Body:"
    Get ComEmit Of hoJResp To sTemp1
    Showln sTemp1

    Get ComLastStatus Of hoHttp To iRespStatusCode
    Showln "Response Status Code = " iRespStatusCode
    If (iRespStatusCode >= 400) Begin
        Showln "Response Header:"
        Get ComLastHeader Of hoHttp To sTemp1
        Showln sTemp1
        Showln "Failed."
        Procedure_Return
    End

    // 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

    Get ComStringOf Of hoJResp "sub" To sV_sub
    Get ComStringOf Of hoJResp "name" To sName
    Get ComStringOf Of hoJResp "given_name" To sGiven_name
    Get ComStringOf Of hoJResp "family_name" To sFamily_name
    Get ComStringOf Of hoJResp "profile" To sProfile
    Get ComStringOf Of hoJResp "picture" To sPicture
    Get ComStringOf Of hoJResp "email" To sEmail
    Get ComBoolOf Of hoJResp "email_verified" To iEmail_verified
    Get ComStringOf Of hoJResp "locale" To sLocale


End_Procedure