[PDFBOX-4934] Could not find referenced cmap stream Adobe-Japan1-XXXX

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.20
• Fix Version/s: 2.0.22, 3.0.0 PDFBox
• Component/s: FontBox
• Environment: Windows10, 64bit
• Assignee: Tilman Hausherr
• Reporter: Shigeru Okada
• Created: 12/Aug/20 05:08
• Updated: 20/Dec/20 18:48
• Resolved: 18/Aug/20 18:36

Description

The IOException exception occurs when attached pdf feeded into PDFBox.

The attached pdf (JP.pdf) file include Adobe-Japan1-65534 cmap.
source code is as below.
—

import javax.imageio.ImageIO;

import org.apache.commons.io.FileUtils;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.TextPosition;

public class pdfBoxTest {
	public static void main(String[] args) throws Exception {
		pdfBoxTest sample = new pdfBoxTest();

		String pdfname = "D:/tmp/jp.pdf";
		File pdf = FileUtils.getFile(pdfname);

		sample.extractTextFromPDF(pdf);
		sample.load(pdf);
	}

	public void load(File pdf) throws Exception {

		PDDocument document = PDDocument.load(pdf);
		PDFRenderer renderer = new PDFRenderer(document);
		BufferedImage bufImage = renderer.renderImageWithDPI(0, 300, ImageType.RGB);

		ImageIO.write(bufImage, "jpg", new File("D:/tmp/jp.jpg"));
	}
}

getExternalCMap mehod in CMapParse.class tries to find external CMap, but
it couldn't find Japan1-65534 and throws exception.

I know that there is no such a CMap, but it is no problem to open this PDF file,
so I think it is better not to throw exception and use another CMap.
I modified source code as below temporarily. it works well.

protected InputStream getExternalCMap(String name) throws IOException {
      InputStream is = this.getClass().getResourceAsStream(name);
       if(is == null) {
          if(name.startsWith("Adobe-Japan1")) {
             name = "Adobe-Japan1-1";
          } else if(name.startsWith("Adobe-Korea1")) {
             name = "Adobe-Korea1-1";
          }
          is = this.getClass().getResourceAsStream(name);
          if(is == null) {
             throw new IOException("Error: Could not find referenced cmap stream " + name);
          }  
      }

       return is;
 }

But it is not essential one.
If possible、I would like to ask you to modify source code not to throw exception if
it cannot find Cmap.

I found another Korean pdf file, it includes Adode-Korea1-3 Cmap.

Please refer to attached file.

Thanks!

//Okada