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(Unicode C) Azure Storage: Download Blob to FileSee more Azure Cloud Storage ExamplesSample code to download an Azure blob to a file. 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_CkStreamW.h> void ChilkatSample(void) { HCkRestW rest; BOOL bTls; int port; BOOL bAutoReconnect; BOOL success; HCkAuthAzureStorageW azAuth; HCkStreamW fileStream; int expectedStatus; const wchar_t *responseStr; // 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: 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: Content-Length, x-ms-date, Authorization. These headers // are automatically set by Chilkat. // Setup a file stream for the download fileStream = CkStreamW_Create(); CkStreamW_putSinkFile(fileStream,L"qa_output/starfish.jpg"); // Indicate that the call to FullRequestNoBody should send the response body // to fileStream if the response status code is 200. // If a non-success response status code is received, then nothing // is streamed to the output file and the error response is returned by FullRequestNoBody. expectedStatus = 200; CkRestW_SetResponseBodyStream(rest,expectedStatus,TRUE,fileStream); // The Azure blob container is "test", the file is "starfish.jpg" responseStr = CkRestW_fullRequestNoBody(rest,L"GET",L"/test/starfish.jpg"); if (CkRestW_getLastMethodSuccess(rest) != TRUE) { // 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"response body (if any): %s\n",responseStr); 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); CkStreamW_Dispose(fileStream); return; } wprintf(L"Success.\n"); CkRestW_Dispose(rest); CkAuthAzureStorageW_Dispose(azAuth); CkStreamW_Dispose(fileStream); } |
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