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https://issues.apache.org/jira/browse/TIKA-4276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17864670#comment-17864670
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Tilman Hausherr commented on TIKA-4276:
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Your file starts with "1 0 obj" instead of with "%PDF" so I'd say this isn't a
bug. The file is truncated at the beginning, and it could be truncated
anywhere. We'd need countless magic numbers.
> Tika fails to detect damaged pdf
> --------------------------------
>
> Key: TIKA-4276
> URL: https://issues.apache.org/jira/browse/TIKA-4276
> Project: Tika
> Issue Type: Bug
> Affects Versions: 2.9.2
> Reporter: Xiaohong Yang
> Priority: Major
>
> We use Tika to check file type and extension. However, with some damaged pdf
> files Tika detects them as text file.
> Wonder if you can make Tika detect the damaged pdf file as pdf file type and
> extension.
> Following is the sample code and the link to the tika-config.xml and the
> sample PDF file is
> [https://1drv.ms/u/s!AvHwMs711s9lgfhtXqh0ycQyzqfG2w?e=q6y2es]
> The operating system is Ubuntu 20.04. Java version is 21. Tika version is
> 2.9.2 and POI version is 5.2.3.
>
>
> import org.apache.tika.config.TikaConfig;
> import org.apache.tika.detect.Detector;
> import org.apache.tika.io.TikaInputStream;
> import org.apache.tika.metadata.Metadata;
> import org.apache.tika.metadata.TikaCoreProperties;
> import org.apache.tika.mime.MediaType;
> import org.apache.tika.mime.MimeType;
>
> import java.io.FileInputStream;
>
> public class DetectDamagedPDF {
>
> public static void main(String args[]) {
> try
> { String filePath =
> "/home/ubuntu/testdirs/testdir_damaged_pdf/DamagedPDF.pdf";
> TikaConfig config = new
> TikaConfig("/home/ubuntu/testdirs/testdir_damaged_pdf/tika-config.xml");
> Detector detector = config.getDetector(); Metadata
> metadata = new Metadata(); FileInputStream fis = new
> FileInputStream(filePath); TikaInputStream stream =
> TikaInputStream.get(fis);
> metadata.add(TikaCoreProperties.RESOURCE_NAME_KEY, filePath);
> MediaType mediaType = detector.detect(stream, metadata); MimeType
> mimeType = config.getMimeRepository().forName(mediaType.toString());
> String tikaExtension = mimeType.getExtension();
> System.out.println("tikaExtension = " + tikaExtension); }
> catch(Exception ex)
> { ex.printStackTrace(); }
> }
> }
>
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