(MFC) Google OAuth2 v3 userinfo (https://www.googleapis.com/oauth2/v3/userinfo)

Demonstrates how to get the Google OAuth2 v3 userinfo.

Important: Make sure the OAuth2 access token included "profile" in the list of scopes.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkJsonObject.h>
#include <CkHttp.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // originally obtained by this example: Get Google People API OAuth2 Access Token
    // or refreshed by this example: Refresh Google People API OAuth2 Access Token

    CkJsonObject jsonToken;
    bool success = jsonToken.LoadFile("qa_data/tokens/googlePeople.json");
    if (success != true) {
        strOut.append("Failed to load googleContacts.json");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkHttp http;

    // -------------------------------------------------------------------------------------
    // Make sure the access token was obtained with "profile" included in the list of scopes.
    // -------------------------------------------------------------------------------------
    http.put_AuthToken(jsonToken.stringOf("access_token"));

    CkStringBuilder sbResponseBody;
    success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/userinfo",sbResponseBody);
    if (success == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        strOut.append(sbResponseBody.getAsString());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Sample JSON Response

    CkJsonObject json;
    json.put_EmitCompact(false);
    json.Load(sbResponseBody.getAsString());
    strOut.append(json.emit());
    strOut.append("\r\n");

    // Sample response:

    // {
    //   "sub": "119999690625687999964",
    //   "name": "Matt",
    //   "given_name": "Matt",
    //   "picture": "https://lh3.googleusercontent.com/-b4...eg3Zjo/AAAAAAAAAAI/AAAAAAAAAAA/AMZuu....3RpdA/s96-c/photo.jpg",
    //   "locale": "en"
    // }
    // 


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }