Joakim Nilsson created PDFBOX-4579:
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             Summary: IndexOutOfBoundsException when setting 
DefaultFontProvider in FontMapper
                 Key: PDFBOX-4579
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4579
             Project: PDFBox
          Issue Type: Bug
          Components: FontBox, PDModel, Text extraction
    Affects Versions: 2.0.15
            Reporter: Joakim Nilsson


When parsing certain pdf's, I'm encountering an IndexOutOfBoundsException in 
WindowsFontDirFinder.java on line 106:
{code:java}
psFontsDir = new File(windir.substring(0, 2) + File.separator + "PSFONTS");
{code}
WindowsFontDirFinder is used by the statement on line 128 in 
FontMapperImpl.java in my case:
{code:java}
private static final FontProvider INSTANCE = new 
FileSystemFontProvider(fontCache);
{code}
The cause of the error is that the value of windir is "" (empty string), at 
least during debugging in Windows. However, I should mention that parsing of 
the same document also fails on ubuntu. While I don't know the exact mechanism 
of the failure on ubuntu, I assume it is related.

The code checks whether windir is null before doing the substring operation, 
but not whether the length is in fact >2. I'm not sure why windir ends up being 
"" here, as the windir env var is C:\WINDOWS.

 

A working fix for me was to change the windir null check on line 94 to:
{code:java}
if (windir != null && !windir.equals(""))
{code}



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