[
https://issues.apache.org/jira/browse/TIKA-1226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13880877#comment-13880877
]
Eric Knauel edited comment on TIKA-1226 at 1/24/14 10:34 AM:
-------------------------------------------------------------
Tim,
I've uploaded a test PDF document that contains a field of type signature.
That's not the original document that led to the error but it produces the same
stack trace. The form data is empty and document is not signed. Somehow I
couldn't get the PDF editor to set the permission for signing to true. (This
permission was enabled in my original document, but I can't publish the
document.)
I think it would be useful to grab information on the signer from the PDF!
was (Author: uknela):
PDF test file with a form that contains a field of type signature.
> PDFTextStripper fails while getting data of PDF form fields of type
> PDSignatureField
> ------------------------------------------------------------------------------------
>
> Key: TIKA-1226
> URL: https://issues.apache.org/jira/browse/TIKA-1226
> Project: Tika
> Issue Type: Bug
> Affects Versions: 1.5
> Reporter: Eric Knauel
> Assignee: Tim Allison
> Attachments: pdf-form-with-signature-field-empty.pdf
>
>
> I have a PDF document that contains a filled in form. Among the various
> fields of type text and radio button there are multiple fields for digital
> signatures. When I load this document into tika-app I get the following
> exception:
> {noformat}
> Caused by: java.lang.RuntimeException: Can't get signature as String, use
> getSignature() instead.
> at
> org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField.getValue(PDSignatureField.java:131)
> at
> org.apache.tika.parser.pdf.PDF2XHTML.addFieldString(PDF2XHTML.java:467)
> at
> org.apache.tika.parser.pdf.PDF2XHTML.processAcroField(PDF2XHTML.java:425)
> at
> org.apache.tika.parser.pdf.PDF2XHTML.extractAcroForm(PDF2XHTML.java:411)
> at org.apache.tika.parser.pdf.PDF2XHTML.endDocument(PDF2XHTML.java:184)
> at
> org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:330)
> at org.apache.tika.parser.pdf.PDF2XHTML.process(PDF2XHTML.java:95)
> at org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:143)
> at
> org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:242)
> ... 43 more
> {noformat}
> The problem seems to be that PDF2XHTML seems to expect that it can call
> getValue() on all PDField objects. According to the PDFBox 1.8.3 java doc
> this is not true for the sub class PDSignatureField:
> http://pdfbox.apache.org/docs/1.8.3/javadocs/org/apache/pdfbox/pdmodel/interactive/form/PDSignatureField.html
> The java doc says that getSignature() should be called instead.
> Assuming that the information inside the signature is not relevant for the
> extraction process and can be discarded the following patch helps:
> {noformat}
> Index: tika-parsers/src/main/java/org/apache/tika/parser/pdf/PDF2XHTML.java
> IDEA additional info:
> Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
> <+>UTF-8
> ===================================================================
> --- tika-parsers/src/main/java/org/apache/tika/parser/pdf/PDF2XHTML.java
> (revision 1560617)
> +++ tika-parsers/src/main/java/org/apache/tika/parser/pdf/PDF2XHTML.java
> (revision )
> @@ -40,6 +40,7 @@
> import
> org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDOutlineNode;
> import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
> import org.apache.pdfbox.pdmodel.interactive.form.PDField;
> +import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField;
> import org.apache.pdfbox.util.PDFTextStripper;
> import org.apache.pdfbox.util.TextPosition;
> import org.apache.tika.exception.TikaException;
> @@ -464,7 +465,9 @@
> }
> String value = "";
> try {
> + if (!(field instanceof PDSignatureField)) {
> - value = field.getValue();
> + value = field.getValue();
> + }
> } catch (IOException e) {
> //swallow
> }
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)
