Hello all
I've written code to take an existing PDF containing a form, populate
values in some of the fields, and then output the results as a new PDF. As
a standalone test class this works great, however as soon as put the code
into a servlet (I wish to serve the resulting PDF to users as a download) I
get an error. The PDFBox-related code and PDF document being used are
exactly the same in both cases.
Clearly there's a difference between the servlet and non-servlet
environments, but so far I've failed to find it. Does anyone have any
suggestions as to where I should be looking?
I'm running OpenJDK 7 and pdfbox-1.8.6, with Jetty as my servlet container.
Example code:
InputStream in = MyServlet.class.getResourceAsStream("Form.pdf");
PDDocument doc = PDDocument.load(in);
PDDocumentCatalog cat = doc.getDocumentCatalog();
PDAcroForm acroForm = cat.getAcroForm();
PDField field = acroForm.getField("myField");
field.setValue("someValue");
The following error is thrown when setValue() is called:
java.io.IOException: null
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:110)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:342)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:254)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.cos.COSStream.getUnfilteredStream(COSStream.java:188)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdfparser.PDFStreamParser.<init>(PDFStreamParser.java:122)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.getStreamTokens(PDAppearance.java:186)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.getStreamTokens(PDAppearance.java:159)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDAppearance.setAppearanceValue(PDAppearance.java:266)
~[pdfbox-app-1.8.6.jar:na]
at
org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.setValue(PDVariableText.java:131)
~[pdfbox-app-1.8.6.jar:na]
...
Caused by:
java.util.zip.DataFormatException: incorrect header check
at java.util.zip.Inflater.inflateBytes(Native Method) ~[na:1.7.0_55]
at java.util.zip.Inflater.inflate(Inflater.java:259) ~[na:1.7.0_55]
at java.util.zip.Inflater.inflate(Inflater.java:280) ~[na:1.7.0_55]
at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:129)
~[pdfbox-app-1.8.6.jar:na]
at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:102)
~[pdfbox-app-1.8.6.jar:na]
...
Many thanks
-Jonathan
