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(Unicode C) Download a Binary File into MemoryDownloads a binary file into memory.
#include <C_CkRestW.h> #include <C_CkAuthAzureStorageW.h> #include <C_CkBinDataW.h> #include <C_CkStringBuilderW.h> void ChilkatSample(void) { HCkRestW rest; BOOL bTls; int port; BOOL bAutoReconnect; BOOL success; HCkAuthAzureStorageW azAuth; HCkBinDataW bdFileContents; HCkStringBuilderW sbXmlErr; // 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 != TRUE) { 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: 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: 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 != TRUE) { 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); } |
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