Unicode C++

Configure Azure SAS Authentication for REST

Demonstrates Rest.SetAuthAzureSas, which associates an AuthAzureSAS provider so requests are authorized with an Azure Shared Access Signature token.

Background. A SAS token grants time-limited, permission-scoped access to Azure Storage resources without exposing the account key on the wire. Use SAS authorization when a query-token approach is preferred over Shared Key headers.

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#include <CkRestW.h>
#include <CkAuthAzureSASW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkRestW rest;
    bool bTls = true;
    bool bAutoReconnect = true;
    success = rest.Connect(L"example.com",443,bTls,bAutoReconnect);
    if (success == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    //  Configure Azure Shared Access Signature (SAS) authentication.  Provide the account access key
    //  and the SAS token query parameters; Chilkat adds the SAS token to each request.
    CkAuthAzureSASW azSas;
    //  Normally you would not hard-code secrets in source.  You should instead obtain them from an
    //  interactive prompt, environment variable, or a secrets vault.
    azSas.put_AccessKey(L"BASE64_ACCOUNT_ACCESS_KEY");

    //  Associate the provider with the REST object.
    success = rest.SetAuthAzureSas(azSas);
    if (success == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    const wchar_t *responseText = rest.fullRequestNoBody(L"GET",L"/mycontainer/myblob.txt");
    if (rest.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    wprintf(L"%s\n",responseText);
    }