(MFC) Upload using Azure Storage Account Shared Access Signature (SAS) Authorization

Sample code to upload binary bytes to a block blob in Azure Cloud Storage using an Azure Storage Account Shared Access Signature (SAS) Authorization. This creates a block blob, or replaces an existing block blob.

Note: The maximum size of a block blob created by uploading in a single step is 64MB. For larger files, the upload must be broken up into blocks. There is another Chilkat example for that..

Note: This example requires Chilkat v9.5.0.65 or later.

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See Also: Using MFC CString in Chilkat

#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkBinData.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // Note: This example requires Chilkat v9.5.0.65 or greater.

    // Azure Blob Service Example: Upload binary bytes to a block blob.
    // This uses a Shared Access Signature (SAS) for Authorization.
    // This creates a new block blob or replaces an existing one in its entirety.
    // 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.

    CkRest 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".
    bool success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // ----------------------------------------------------------------------------------------------
    // The code above this comment could be placed inside a function/subroutine within the application
    // because the connection does not need to be made for every request.  Once the connection is made
    // the app may send many requests..
    // ----------------------------------------------------------------------------------------------

    // 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.

    // Let's load a previously computed Azure Storage Account SAS token and use it.
    // See How to Create an Azure Storage Account Shared Access Signature
    CkStringBuilder sbToken;
    success = sbToken.LoadFile("qa_data/tokens/azureStorageAccountSas.txt","utf-8");
    if (success != true) {
        strOut.append("Failed to load SAS token.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Add the Shared Access Signature query params for authorization.
    rest.AddQueryParams(sbToken.getAsString());

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

    // IMPORTANT: Make sure to add the x-ms-date header.
    // When the header name is "x-ms-date", Chilkat will recognize the keyword "NOW" 
    // and will substitute the current system date/time formatted as required by Microsoft.
    success = rest.AddHeader("x-ms-date","NOW");

    // For this example, we'll just load a JPG file into memory..
    CkBinData binData;
    success = binData.LoadFile("qa_data/jpg/starfish.jpg");
    if (success != true) {
        strOut.append("Failed to load JPG file.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // Note: The maximum size of a block blob created by uploading in a single step is 64MB.  
    // For larger files, the upload must be broken up into blocks.  There is another Chilkat example for that..
    CkStringBuilder sbResponse;
    success = rest.FullRequestBd("PUT","/mycontainer/starfish.jpg",binData,sbResponse);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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.
        strOut.append("response status code = ");
        strOut.appendInt(rest.get_ResponseStatusCode());
        strOut.append("\r\n");
        strOut.append("response status text = ");
        strOut.append(rest.responseStatusText());
        strOut.append("\r\n");
        strOut.append("response header: ");
        strOut.append(rest.responseHeader());
        strOut.append("\r\n");
        strOut.append("response body (if any): ");
        strOut.append(sbResponse.getAsString());
        strOut.append("\r\n");
        strOut.append("---");
        strOut.append("\r\n");
        strOut.append("LastRequestStartLine: ");
        strOut.append(rest.lastRequestStartLine());
        strOut.append("\r\n");
        strOut.append("LastRequestHeader: ");
        strOut.append(rest.lastRequestHeader());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Success.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }