C++

Azure Storage: Upload Binary Data to Block Blob using BinData

See more Azure Cloud Storage Examples

Sample code to upload binary bytes (contained in a Chilkat BinData object) to a block blob in Azure Cloud Storage. This creates the 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..

C++

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

void ChilkatSample(void)
    {
    bool success = false;

    // Azure Blob Service Example: Upload binary bytes to a block blob.
    // 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".
    success = rest.Connect("chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    // Provide Azure Cloud credentials for the REST call.
    CkAuthAzureStorage azAuth;
    azAuth.put_AccessKey("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("chilkat");
    azAuth.put_Scheme("SharedKey");
    azAuth.put_Service("Blob");
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    azAuth.put_XMsVersion("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("x-ms-blob-type","BlockBlob");

    // For this example, we'll just load a JPG file into memory..
    CkBinData bd;
    success = bd.LoadFile("qa_data/jpg/starfish.jpg");
    if (success == false) {
        std::cout << "Failed to load the file to be uploaded." << "\r\n";
        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 sbResponseBody;
    success = rest.FullRequestBd("PUT","/mycontainer/starfish.jpg",bd,sbResponseBody);
    if (success == false) {
        std::cout << rest.lastErrorText() << "\r\n";
        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.
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body (if any): " << sbResponseBody.getAsString() << "\r\n";
        std::cout << "---" << "\r\n";
        std::cout << "LastRequestStartLine: " << rest.lastRequestStartLine() << "\r\n";
        std::cout << "LastRequestHeader: " << rest.lastRequestHeader() << "\r\n";
        return;
    }

    std::cout << "Success." << "\r\n";
    }