Java

Extract data:image/png;base64 from HTML

See more Base64 Examples

Demonstrates how to extract base64 image data from HTMl and save to files. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    CkStringBuilder sb = new CkStringBuilder();
    CkBinData bd = new CkBinData();
    CkStringBuilder sbFilename = new CkStringBuilder();
    int index = 1;

    success = sb.LoadFile("qa_data/html/oresp body.txt","utf-8");
    // Assume success.
    System.out.println("length = " + sb.get_Length());

    boolean 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.get_LastMethodSuccess();

        if (sb.get_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");

    System.out.println("All done.");
  }
}