Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Unicode C) Extract data:image/png;base64 from HTMLDemonstrates how to extract base64 image data from HTMl and save to files..
#include <C_CkStringBuilderW.h> #include <C_CkBinDataW.h> void ChilkatSample(void) { HCkStringBuilderW sb; HCkBinDataW bd; HCkStringBuilderW sbFilename; int index; BOOL success; BOOL mayHaveMore; const wchar_t *sBase64; int count; sb = CkStringBuilderW_Create(); bd = CkBinDataW_Create(); sbFilename = CkStringBuilderW_Create(); index = 1; success = CkStringBuilderW_LoadFile(sb,L"qa_data/html/oresp body.txt",L"utf-8"); // Assume success. wprintf(L"length = %d\n",CkStringBuilderW_getLength(sb)); mayHaveMore = TRUE; while (mayHaveMore == TRUE) { // Get the base64 between the 1st occurrence "data:image/png;base64," and "'" sBase64 = CkStringBuilderW_getBetween(sb,L"data:image/png;base64,",L"'"); // If nothing is found, then we'll exit the loop because there are no more. mayHaveMore = CkStringBuilderW_getLastMethodSuccess(sb); if (CkStringBuilderW_getLastMethodSuccess(sb) == TRUE) { // Found something. // Load into bd and save. success = CkBinDataW_LoadEncoded(bd,sBase64,L"base64"); CkStringBuilderW_SetString(sbFilename,L"qa_output/png_"); CkStringBuilderW_AppendInt(sbFilename,index); CkStringBuilderW_Append(sbFilename,L".png"); CkBinDataW_WriteFile(bd,CkStringBuilderW_getAsString(sbFilename)); // Replace "data:image/png;base64" with "data:image-png;base64" so the next iteration finds the next occurrence. CkStringBuilderW_ReplaceFirst(sb,L"data:image/png;base64",L"data:image-png;base64"); } index = index + 1; } // Restore our replacements.. count = CkStringBuilderW_Replace(sb,L"data:image-png;base64",L"data:image/png;base64"); wprintf(L"All done.\n"); CkStringBuilderW_Dispose(sb); CkBinDataW_Dispose(bd); CkStringBuilderW_Dispose(sbFilename); } |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.