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  1. JDK
  2. JDK-8080369

(fs) Files.probeContentType returns null on Windows

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    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_8

      Description

      FULL PRODUCT VERSION :
      1.8.0_45

      ADDITIONAL OS VERSION INFORMATION :
      Window 8.1 32 bits

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      Files.probeContentType(file.toPath()) returns null for all tested files: txt, pdf and .ini.



      A DESCRIPTION OF THE PROBLEM :
      This doesn't happen on Windows 7 64 bits using jdk 1.8.0_45. So it must be a bug in the jdk 1.8.0_45 for 32 bits.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Testiing code:

      // http://www.ibm.com/developerworks/library/j-nativememory-linux/j-nativememory-linux-pdf.pdf

      FIle file = new File(D:\\j-nativememory-linux/j-nativememory-linux-pdf.pdf);

            if (file.isFile())
            {
                 String s = Files.probeContentType(file.toPath());
                 // s is always null on Win8 32 bits, this works on Win7 64 bits
            }

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Files.probeContentType must return "application/pdf" for pdf files.
      ACTUAL -
      Files.probeContentType returns null for pdf files.

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      Throws Java.NullPointerException whe tried to do:

       Files.probeContentType(file.toPath()).equals("application/pdf");

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      // http://www.ibm.com/developerworks/library/j-nativememory-linux/j-nativememory-linux-pdf.pdf

      FIle file = new File(D:\\j-nativememory-linux/j-nativememory-linux-pdf.pdf);

            if (file.isFile())
            {
                 String s = Files.probeContentType(file.toPath());
                 // s is always null on Win8 32 bits, this works on Win7 64 bits
            }
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      reading pdf's header

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              Assignee:
              bpb Brian Burkhalter
              Reporter:
              webbuggrp Webbug Group
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              1 Vote for this issue
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              6 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: