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(Unicode C) Gzip Compress In Memory and Base64 EncodeDemonstrates how to Gzip compress in-memory data and then encode the compressed data to base64.
#include <C_CkGzipW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkGzipW gzip; HCkBinDataW fileData; BOOL success; const wchar_t *strBase64; const wchar_t *strBase64MultiLine; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. gzip = CkGzipW_Create(); // This example will load a file into the fileData object. // Your application might load fileData from other sources.. fileData = CkBinDataW_Create(); success = CkBinDataW_LoadFile(fileData,L"qa_data/xml/hamlet.xml"); if (success != TRUE) { wprintf(L"Failed to load file.\n"); CkGzipW_Dispose(gzip); CkBinDataW_Dispose(fileData); return; } // In-place compress the contents of fileData success = CkGzipW_CompressBd(gzip,fileData); if (success != TRUE) { wprintf(L"%s\n",CkGzipW_lastErrorText(gzip)); CkGzipW_Dispose(gzip); CkBinDataW_Dispose(fileData); return; } // Get the base64 encoded compressed data (in a single line). strBase64 = CkBinDataW_getEncoded(fileData,L"base64"); wprintf(L"%s\n",strBase64); wprintf(L"--------\n"); // To get the base64 in multiple lines, as it might appear in MIME, // use "base64-mime". strBase64MultiLine = CkBinDataW_getEncoded(fileData,L"base64-mime"); wprintf(L"%s\n",strBase64MultiLine); CkGzipW_Dispose(gzip); CkBinDataW_Dispose(fileData); } |
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