Unicode C

Download a Binary File into Memory

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Downloads a binary file into memory. Unicode C

#include <C_CkRestW.h>
#include <C_CkAuthAzureStorageW.h>
#include <C_CkBinDataW.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRestW rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkAuthAzureStorageW azAuth;
    HCkBinDataW bdFileContents;
    HCkStringBuilderW sbXmlErr;

    success = FALSE;

    // Azure File Service Example: Download a Binary File to Memory
    // See:  https://docs.microsoft.com/en-us/rest/api/storageservices/get-file

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

    rest = CkRestW_Create();

    // Connect to the Azure Storage Blob Service
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    // In this example, the storage account name is "chilkat".
    success = CkRestW_Connect(rest,L"chilkat.file.core.windows.net",port,bTls,bAutoReconnect);
    if (success == FALSE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        return;
    }

    // Provide Azure Cloud credentials for the REST calls.
    azAuth = CkAuthAzureStorageW_Create();
    CkAuthAzureStorageW_putAccessKey(azAuth,L"AZURE_ACCESS_KEY");
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    CkAuthAzureStorageW_putAccount(azAuth,L"chilkat");
    CkAuthAzureStorageW_putScheme(azAuth,L"SharedKey");
    CkAuthAzureStorageW_putService(azAuth,L"File");
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    CkAuthAzureStorageW_putXMsVersion(azAuth,L"2021-08-06");
    success = CkRestW_SetAuthAzureStorage(rest,azAuth);

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

    // Send a GET request to download the file "penguins.jpg" to a BinData object.
    // (The share name is "pip")
    bdFileContents = CkBinDataW_Create();
    success = CkRestW_FullRequestNoBodyBd(rest,L"GET",L"/pip/wildlife/antarctic/penguins.jpg",bdFileContents);
    if (success == FALSE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAzureStorageW_Dispose(azAuth);
        CkBinDataW_Dispose(bdFileContents);
        return;
    }

    // When successful, the response status will be 200.
    // If a non-success status code is returned, then the bdFileContents actually contains the XML error message.
    if (CkRestW_getResponseStatusCode(rest) != 200) {
        // Examine the request/response to see what happened.
        wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest));
        wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest));
        wprintf(L"response header: %s\n",CkRestW_responseHeader(rest));
        sbXmlErr = CkStringBuilderW_Create();
        CkStringBuilderW_AppendBd(sbXmlErr,bdFileContents,L"utf-8",0,0);
        wprintf(L"response body (if any): %s\n",CkStringBuilderW_getAsString(sbXmlErr));
        wprintf(L"---\n");
        wprintf(L"LastRequestStartLine: %s\n",CkRestW_lastRequestStartLine(rest));
        wprintf(L"LastRequestHeader: %s\n",CkRestW_lastRequestHeader(rest));
        CkRestW_Dispose(rest);
        CkAuthAzureStorageW_Dispose(azAuth);
        CkBinDataW_Dispose(bdFileContents);
        CkStringBuilderW_Dispose(sbXmlErr);
        return;
    }

    wprintf(L"Size of the downloaded file = %d\n",CkBinDataW_getNumBytes(bdFileContents));

    // See the online reference documentation for the BinData class for ways
    // to access the bytes.

    CkBinDataW_WriteFile(bdFileContents,L"qa_output/penguins.jpg");


    CkRestW_Dispose(rest);
    CkAuthAzureStorageW_Dispose(azAuth);
    CkBinDataW_Dispose(bdFileContents);
    CkStringBuilderW_Dispose(sbXmlErr);

    }