Unicode C++

Get a Google Drive Access Token using a JSON Private Key

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Demonstrates how to get a Google Drive API access token using a JSON service account private key. Unicode C++

#include <CkFileAccessW.h>
#include <CkAuthGoogleW.h>
#include <CkSocketW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    //  First load the JSON key into a string.
    CkFileAccessW fac;
    const wchar_t *jsonKey = fac.readEntireTextFile(L"qa_data/googleApi/chilkatcloud-b8826e030499.json",L"utf-8");
    if (fac.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",fac.lastErrorText());
        return;
    }

    CkAuthGoogleW gAuth;
    gAuth.put_JsonKey(jsonKey);

    //  Choose a scope.
    gAuth.put_Scope(L"https://www.googleapis.com/auth/drive");

    //  Request an access token that is valid for this many seconds.
    gAuth.put_ExpireNumSeconds(3600);

    //  If the application is requesting delegated access:
    //  The email address of the user for which the application is requesting delegated access,
    //  then set the email address here. (Otherwise leave it empty.)
    gAuth.put_SubEmailAddress(L"");

    //  Connect to www.googleapis.com using TLS (TLS 1.2 is the default.)
    //  The Chilkat socket object is used so that the connection can be established
    //  through proxies or an SSH tunnel if desired.
    CkSocketW tlsSock;
    success = tlsSock.Connect(L"www.googleapis.com",443,true,5000);
    if (success != true) {
        wprintf(L"%s\n",tlsSock.lastErrorText());
        return;
    }

    //  Send the request to obtain the access token.
    success = gAuth.ObtainAccessToken(tlsSock);
    if (success != true) {
        wprintf(L"%s\n",gAuth.lastErrorText());
        return;
    }

    //  Examine the access token:
    wprintf(L"Access Token: %s\n",gAuth.accessToken());
    }