(MFC) Refresh QuickBooks OAuth2 Access Token

Demonstrates how to refresh a QuickBooks OAuth2 access token.

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

See Also: Using MFC CString in Chilkat

#include <CkJsonObject.h>
#include <CkOAuth2.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    // See Get QuickBooks OAuth2 Access Token 
    // for sample code showing how to obtain a QuickBooks access token for desktop apps.

    // This example assumes we previously obtained an OAuth2 access token for QuickBooks.

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

    // The access token JSON looks something like this:

    // {
    //   "expires_in": 3600,
    //   "x_refresh_token_expires_in": 8726400,
    //   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
    //   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
    //   "token_type": "bearer"
    // }

    CkOAuth2 oauth2;

    oauth2.put_TokenEndpoint("https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer");

    // Replace these with actual values.
    oauth2.put_ClientId("QUICKBOOKS-CLIENT-ID");
    oauth2.put_ClientSecret("QUICKBOOKS-CLIENT-SECRET");

    // Get the "refresh_token"
    oauth2.put_RefreshToken(jsonToken.stringOf("refresh_token"));

    // Send the HTTP POST to refresh the access token..
    success = oauth2.RefreshAccessToken();
    if (success != true) {
        strOut.append(oauth2.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The response contains a new access token, but we must keep
    // our existing refresh token for when we need to refresh again in the future.
    jsonToken.UpdateString("access_token",oauth2.accessToken());

    // Save the new JSON access token response to a file.
    // The access + refresh tokens contained in this JSON will be needed for the next refresh.
    CkStringBuilder sbJson;
    jsonToken.put_EmitCompact(false);

    jsonToken.EmitSb(sbJson);
    sbJson.WriteFile("qa_data/tokens/qb-access-token.json","utf-8",false);

    strOut.append("OAuth2 token refreshed!");
    strOut.append("\r\n");
    strOut.append("New Access Token = ");
    strOut.append(oauth2.accessToken());
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }