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(C#) Extract data:image/png;base64 from HTMLDemonstrates how to extract base64 image data from HTMl and save to files..
Chilkat.StringBuilder sb = new Chilkat.StringBuilder(); Chilkat.BinData bd = new Chilkat.BinData(); Chilkat.StringBuilder sbFilename = new Chilkat.StringBuilder(); int index = 1; bool success = sb.LoadFile("qa_data/html/oresp body.txt","utf-8"); // Assume success. Debug.WriteLine("length = " + Convert.ToString(sb.Length)); bool mayHaveMore = true; while (mayHaveMore == true) { // Get the base64 between the 1st occurrence "data:image/png;base64," and "'" string sBase64 = sb.GetBetween("data:image/png;base64,","'"); // If nothing is found, then we'll exit the loop because there are no more. mayHaveMore = sb.LastMethodSuccess; if (sb.LastMethodSuccess == true) { // Found something. // Load into bd and save. success = bd.LoadEncoded(sBase64,"base64"); sbFilename.SetString("qa_output/png_"); sbFilename.AppendInt(index); sbFilename.Append(".png"); bd.WriteFile(sbFilename.GetAsString()); // Replace "data:image/png;base64" with "data:image-png;base64" so the next iteration finds the next occurrence. sb.ReplaceFirst("data:image/png;base64","data:image-png;base64"); } index = index + 1; } // Restore our replacements.. int count = sb.Replace("data:image-png;base64","data:image/png;base64"); Debug.WriteLine("All done."); |
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