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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2012/05/19 18:53:41 UTC
[jira] [Updated] (PDFBOX-1240) Extract Images from PDF file using
PDFBox in C#
[ https://issues.apache.org/jira/browse/PDFBOX-1240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler updated PDFBOX-1240:
---------------------------------------
Priority: Minor (was: Blocker)
> Extract Images from PDF file using PDFBox in C#
> -----------------------------------------------
>
> Key: PDFBOX-1240
> URL: https://issues.apache.org/jira/browse/PDFBOX-1240
> Project: PDFBox
> Issue Type: New Feature
> Components: Utilities
> Affects Versions: 0.7.3
> Reporter: Pham Minh Cuong
> Priority: Minor
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> public class ExtractImage
> {
> private int imageCounter = 1;
> private static string PASSWORD = "-password";
> private static string PREFIX = "-prefix";
> public ExtractImage()
> {
> }
> public void extractImage(string []args)
> {
> if(args.Length<1||args.Length>4)
> {
> usage();
> }
> else
> {
> string pdfFile = "";
> string password = "";
> string prefix = null;
> for (int i = 0; i < args.Length; i++)
> {
> if(args[i]==PASSWORD)
> {
> i++;
> if (i >= args.Length)
> {
> usage();
> }
> password = args[i];
> }
> else if (args[i]==PREFIX)
> {
> i++;
> if(i>=args.Length)
> {
> usage();
> }
> prefix = args[i];
> }
> else
> {
> if(pdfFile==null)
> {
> pdfFile = args[i];
> }
> }
> }
> if(pdfFile==null)
> {
> usage();
> }
> else
> {
> if(prefix==null && pdfFile.Length>4)
> {
> prefix = pdfFile.Substring(0, pdfFile.Length - 4);
> }
> PDDocument document=null;
> try
> {
> document = PDDocument.load(pdfFile);
> if( document.isEncrypted() )
> {
>
> StandardDecryptionMaterial spm = new StandardDecryptionMaterial(password);
> document.openProtection(spm);
> AccessPermission ap = document.getCurrentAccessPermission();
>
>
> if( ! ap.canExtractContent() )
> {
> Console.WriteLine("Error: You do not have permission to extract images." );
> }
> }
>
> List pages = document.getDocumentCatalog().getAllPages();
> java.util.Iterator iter = pages.iterator();
> while( iter.hasNext() )
> {
> PDPage page = (PDPage)iter.next();
> PDResources resources = page.getResources();
> java.util.Map images = resources.getImages();
> if( images != null )
> {
> Iterator imageIter = images.keySet().iterator();
> while( imageIter.hasNext() )
> {
> string key = (String )imageIter.next();
> PDXObjectImage image = (PDXObjectImage)images.get( key );
> string name = getUniqueFileName( key, image.getSuffix() );
> Console.WriteLine( "Writing image:" + name );
> image.write2file( name );
> }
> }
> }
> }
> catch (Exception)
> {
>
> throw;
> }
> }
> }
> }
> private string getUniqueFileName(string prefix, string suffix)
> {
> string uniqueName = null;
> java.io.File f = null;
> f = null;
> while (f == null || f.exists())
> {
> uniqueName = prefix + "-" + imageCounter;
> f =new File(uniqueName + "." + suffix);
> imageCounter++;
> }
> return uniqueName;
> }
> private void usage()
> {
> Console.Error.WriteLine("Usage: java org.pdfbox.ExtractImages [OPTIONS] <PDF file>\n" +
> " -password <password> Password to decrypt document\n" +
> " -prefix <image-prefix> Image prefix(default to pdf name)\n" +
> " <PDF file> The PDF document to use\n");
> Environment.Exit(1);
> }
> }
> Reference: http://svn.apache.org/repos/asf/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/ExtractImages.java
> I tested but i have a problem.It ran if(args.Length<1||args.Length>4) and stopped in usage().It loop.Please help me.Many thanks.
> {
> usage();
> }
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