Missing TTC header error

Mon, 05 Sep 2022 05:56:05 -0700 

Hi all,
I am using pdfbox for the first time and trying to run the example code provided here on a pdf which I have stored locally: 

https://svn.apache.org/viewvc/pdfbox/trunk/examples/src/main/java/org/apache/pdfbox/examples/interactive/form/FillFormField.java?view=markup


Unfortunately when running the code I number of IOExceptions are thrown 
with the message "Missing TTC Header" (full error message attached).  
Looking at the source code I see that the reason is that the constructor 
of the TrueTypeCollection class throws the error because the "tag" of 
the .ttc font is not what it expected namely the String value "ttcf":


https://github.com/apache/pdfbox/blob/trunk/fontbox/src/main/java/org/apache/fontbox/ttf/TrueTypeCollection.java


Opening one of the files for which the exception was thrown 
(NotoSerifCJK-Regular.ttc, also attached) where an exception was thrown, 
it does seem to me that the file simply contains html, and it does seem 
to be that the expected tag is simply not present as the error states. 
If anyone could help me resolve this error or provide any further 
insights to highlight something I'm misunderstanding it would be greatly 
appreciated. The code as well as the document I use to run this example 
can be found on github:


https://github.com/JacobMacWilliams/pdfexamples


I apologize if any of these questions come across as naive, this my 
first time working on a similar project.


Best,

Jacob MacWilliams


Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider 
loadDiskCache
WARNING: New fonts found, font cache will be re-built
Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider 
<init>
WARNING: Building on-disk font cache, this may take a while
Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider 
addTrueTypeCollection
SEVERE: Could not load font file: /usr/share/fonts/noto/NotoSerifCJK-Regular.ttc
java.io.IOException: Missing TTC header
        at 
org.apache.fontbox.ttf.TrueTypeCollection.<init>(TrueTypeCollection.java:73)
        at 
org.apache.fontbox.ttf.TrueTypeCollection.<init>(TrueTypeCollection.java:45)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.addTrueTypeCollection(FileSystemFontProvider.java:604)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.scanFonts(FileSystemFontProvider.java:378)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.<init>(FileSystemFontProvider.java:350)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl$DefaultFontProvider.<clinit>(FontMapperImpl.java:135)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.getProvider(FontMapperImpl.java:154)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFont(FontMapperImpl.java:418)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFontBoxFont(FontMapperImpl.java:381)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.getFontBoxFont(FontMapperImpl.java:355)
        at 
org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:146)
        at 
org.apache.pdfbox.pdmodel.font.PDType1Font.<clinit>(PDType1Font.java:63)
        at 
org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:75)
        at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:143)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processSetFont(PDDefaultAppearanceString.java:169)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processOperator(PDDefaultAppearanceString.java:132)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processAppearanceStringOperators(PDDefaultAppearanceString.java:109)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.<init>(PDDefaultAppearanceString.java:87)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.getDefaultAppearanceString(PDVariableText.java:93)
        at 
org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.<init>(AppearanceGeneratorHelper.java:115)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTextField.constructAppearances(PDTextField.java:261)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTerminalField.applyChange(PDTerminalField.java:210)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTextField.setValue(PDTextField.java:218)
        at com.example.fillform.FillFormField.main(FillFormField.java:46)

Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider 
addTrueTypeCollection
SEVERE: Could not load font file: /usr/share/fonts/noto/NotoSansCJK-Regular.ttc
java.io.IOException: Missing TTC header
        at 
org.apache.fontbox.ttf.TrueTypeCollection.<init>(TrueTypeCollection.java:73)
        at 
org.apache.fontbox.ttf.TrueTypeCollection.<init>(TrueTypeCollection.java:45)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.addTrueTypeCollection(FileSystemFontProvider.java:604)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.scanFonts(FileSystemFontProvider.java:378)
        at 
org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.<init>(FileSystemFontProvider.java:350)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl$DefaultFontProvider.<clinit>(FontMapperImpl.java:135)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.getProvider(FontMapperImpl.java:154)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFont(FontMapperImpl.java:418)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFontBoxFont(FontMapperImpl.java:381)
        at 
org.apache.pdfbox.pdmodel.font.FontMapperImpl.getFontBoxFont(FontMapperImpl.java:355)
        at 
org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:146)
        at 
org.apache.pdfbox.pdmodel.font.PDType1Font.<clinit>(PDType1Font.java:63)
        at 
org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:75)
        at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:143)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processSetFont(PDDefaultAppearanceString.java:169)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processOperator(PDDefaultAppearanceString.java:132)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.processAppearanceStringOperators(PDDefaultAppearanceString.java:109)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDDefaultAppearanceString.<init>(PDDefaultAppearanceString.java:87)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDVariableText.getDefaultAppearanceString(PDVariableText.java:93)
        at 
org.apache.pdfbox.pdmodel.interactive.form.AppearanceGeneratorHelper.<init>(AppearanceGeneratorHelper.java:115)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTextField.constructAppearances(PDTextField.java:261)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTerminalField.applyChange(PDTerminalField.java:210)
        at 
org.apache.pdfbox.pdmodel.interactive.form.PDTextField.setValue(PDTextField.java:218)
        at com.example.fillform.FillFormField.main(FillFormField.java:46)

Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider 
<init>
WARNING: Finished building on-disk font cache, found 709 fonts
Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.PDType1Font <init>
WARNING: Using fallback font LiberationSans for base font Symbol
Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.font.PDType1Font <init>
WARNING: Using fallback font LiberationSans for base font ZapfDingbats
Sep 05, 2022 2:42:08 PM org.apache.pdfbox.pdmodel.PDDocument save
WARNING: You are overwriting an existing file, this will produce a corrupted 
file if you're also reading from it
Exception in thread "main" java.lang.IllegalStateException: PDF contains an 
encryption dictionary, please remove it with setAllSecurityToBeRemoved() or set 
a protection policy with protect()
        at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1505)
        at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1456)
        at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1010)
        at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:955)
        at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:912)
        at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:895)
        at com.example.fillform.FillFormField.main(FillFormField.java:55)



Attachment:
NotoSansCJK-Regular.ttc

Description: font/collection


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