Unicode C++

Azure Storage: Upload Empty File to Block Blob

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Demonstrates how to create an empty block blob in Azure Storage. Unicode C++

#include <CkRestW.h>
#include <CkAuthAzureStorageW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // Azure Blob Service Example: Demonstrates how to create an empty block blob.
    // See also: https://msdn.microsoft.com/en-us/library/azure/dd179451.aspx

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

    CkRestW rest;

    // Connect to the Azure Storage Blob Service
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    // In this example, the storage account name is "chilkat".
    success = rest.Connect(L"chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // Provide Azure Cloud credentials for the REST call.
    CkAuthAzureStorageW azAuth;
    azAuth.put_AccessKey(L"AZURE_ACCESS_KEY");
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    azAuth.put_Account(L"chilkat");
    azAuth.put_Scheme(L"SharedKey");
    azAuth.put_Service(L"Blob");
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    azAuth.put_XMsVersion(L"2021-08-06");
    success = rest.SetAuthAzureStorage(azAuth);

    // Note: The application does not need to explicitly set the following
    // headers: Content-Length, x-ms-date, Authorization.  These headers
    // are automatically set by Chilkat.

    // IMPORTANT: Make sure to set the x-ms-blob-type header:
    success = rest.AddHeader(L"x-ms-blob-type",L"BlockBlob");

    // To create an empty blob, upload a zero-length string.
    const wchar_t *responseStr = rest.fullRequestString(L"PUT",L"/mycontainer/empty.txt",L"");
    if (rest.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // When successful, the Azure Storage service will respond with a 201 response status code,
    // with no response body.

    if (rest.get_ResponseStatusCode() != 201) {
        // Examine the request/response to see what happened.
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response body (if any): %s\n",responseStr);
        wprintf(L"---\n");
        wprintf(L"LastRequestStartLine: %s\n",rest.lastRequestStartLine());
        wprintf(L"LastRequestHeader: %s\n",rest.lastRequestHeader());
        return;
    }

    wprintf(L"Success.\n");
    }