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(Unicode C) Adding x-ms-range header to Azure Blob DownloadSee more Azure Cloud Storage ExamplesDemonstrates how to add an x-ms-range header to an Azure blob download. For more information, see https://docs.microsoft.com/en-us/rest/api/storageservices/get-blob
#include <C_CkRestW.h> #include <C_CkAuthAzureStorageW.h> #include <C_CkStringBuilderW.h> void ChilkatSample(void) { HCkRestW rest; BOOL bTls; int port; BOOL bAutoReconnect; BOOL success; HCkAuthAzureStorageW azAuth; HCkStringBuilderW sb; // 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.blob.core.windows.net",port,bTls,bAutoReconnect); if (success != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkRestW_Dispose(rest); return; } // Provide Azure Cloud credentials for the REST call. 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"Blob"); // This causes the "x-ms-version: 2020-08-04" header to be automatically added. CkAuthAzureStorageW_putXMsVersion(azAuth,L"2020-08-04"); success = CkRestW_SetAuthAzureStorage(rest,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. // Add the x-ms-range header. // See x-ms-range Header Format // The file we're downloading contains "Hello World!", so we'll download just the "World!" part.. CkRestW_AddHeader(rest,L"x-ms-range",L"bytes=6-"); // The Azure blob container is "test", the file is "helloWorld.txt" sb = CkStringBuilderW_Create(); success = CkRestW_FullRequestNoBodySb(rest,L"GET",L"/test/helloWorld.txt",sb); if (success == FALSE) { // 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)); 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); CkStringBuilderW_Dispose(sb); return; } wprintf(L"%s\n",CkStringBuilderW_getAsString(sb)); wprintf(L"Success.\n"); CkRestW_Dispose(rest); CkAuthAzureStorageW_Dispose(azAuth); CkStringBuilderW_Dispose(sb); } |
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