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Diffstat (limited to 'src/main/java/org/pdfbox/ExtractImages.java')
| -rw-r--r-- | src/main/java/org/pdfbox/ExtractImages.java | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/main/java/org/pdfbox/ExtractImages.java b/src/main/java/org/pdfbox/ExtractImages.java new file mode 100644 index 0000000..a8e46ee --- /dev/null +++ b/src/main/java/org/pdfbox/ExtractImages.java @@ -0,0 +1,210 @@ +/**
+ * Copyright (c) 2003-2004, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of pdfbox; nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox;
+
+import java.io.File;
+import java.io.IOException;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.pdfbox.pdmodel.PDDocument;
+import org.pdfbox.pdmodel.PDPage;
+import org.pdfbox.pdmodel.PDResources;
+
+import org.pdfbox.pdmodel.encryption.PDEncryptionDictionary;
+import org.pdfbox.pdmodel.encryption.PDStandardEncryption;
+import org.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;
+
+/**
+ * This will read a read pdf and extract images. <br/><br/>
+ *
+ * usage: java org.pdfbox.ExtractImages <pdffile> <password> [imageprefix]
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.3 $
+ */
+public class ExtractImages
+{
+ private int imageCounter = 1;
+
+ private static final String PASSWORD = "-password";
+ private static final String PREFIX = "-prefix";
+
+ /**
+ * This is the entry point for the application.
+ *
+ * @param args The command-line arguments.
+ *
+ * @throws Exception If there is an error decrypting the document.
+ */
+ public static void main( String[] args ) throws Exception
+ {
+ ExtractImages extractor = new ExtractImages();
+ extractor.extractImages( args );
+ }
+
+ private void extractImages( String[] args ) throws Exception
+ {
+ if( args.length < 1 || args.length > 3 )
+ {
+ usage();
+ }
+ else
+ {
+ String pdfFile = null;
+ String password = "";
+ String prefix = null;
+ for( int i=0; i<args.length; i++ )
+ {
+ if( args[i].equals( PASSWORD ) )
+ {
+ i++;
+ if( i >= args.length )
+ {
+ usage();
+ }
+ password = args[i];
+ }
+ else if( args[i].equals( PREFIX ) )
+ {
+ i++;
+ if( i >= args.length )
+ {
+ usage();
+ }
+ prefix = args[i];
+ }
+ else
+ {
+ if( pdfFile == null )
+ {
+ pdfFile = args[i];
+ }
+ }
+ }
+ if( prefix == null && pdfFile.length() >4 )
+ {
+ prefix = pdfFile.substring( 0, pdfFile.length() -4 );
+ }
+
+ PDDocument document = null;
+
+ try
+ {
+ document = PDDocument.load( pdfFile );
+
+ if( document.isEncrypted() )
+ {
+ if( document.isOwnerPassword( password ) )
+ {
+ document.decrypt( password );
+ }
+ else
+ {
+ throw new IOException(
+ "Error: You are only allowed to extract images with the owner password." );
+ }
+ }
+
+ PDEncryptionDictionary encDictionary = document.getEncryptionDictionary();
+
+ //only care about standard encryption and if it was decrypted with the
+ //user password
+ if( encDictionary instanceof PDStandardEncryption &&
+ !document.wasDecryptedWithOwnerPassword() )
+ {
+ PDStandardEncryption stdEncryption = (PDStandardEncryption)encDictionary;
+ if( !stdEncryption.canExtractContent() )
+ {
+ throw new IOException( "You do not have permission to extract images." );
+ }
+ }
+
+ List pages = document.getDocumentCatalog().getAllPages();
+ Iterator iter = pages.iterator();
+ while( iter.hasNext() )
+ {
+ PDPage page = (PDPage)iter.next();
+ PDResources resources = page.getResources();
+ 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() );
+ System.out.println( "Writing image:" + name );
+ image.write2file( name );
+ }
+ }
+ }
+ }
+ finally
+ {
+ if( document != null )
+ {
+ document.close();
+ }
+ }
+ }
+ }
+
+ private String getUniqueFileName( String prefix, String suffix )
+ {
+ String uniqueName = null;
+ File f = null;
+ while( f == null || f.exists() )
+ {
+ uniqueName = prefix + "-" + imageCounter;
+ f = new File( uniqueName + "." + suffix );
+ imageCounter++;
+ }
+ return uniqueName;
+ }
+
+ /**
+ * This will print the usage requirements and exit.
+ */
+ private static void usage()
+ {
+ System.err.println( "Usage: java org.pdfbox.ExtractImages [OPTIONS] <PDF file>\n" +
+ " -password <password> Password to decrypt document\n" +
+ " -suffix <password> Image suffix(default to pdf name)\n" +
+ " <PDF file> The PDF document to use\n"
+ );
+ System.exit( 1 );
+ }
+
+}
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