PI50692: Data conversion issue for Multi-part MIME on mainframe (z/OS)

8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• We have a method annotated as follows:-
  
  @POST
  @Consumes(MediaType.MULTIPART_FORM_DATA)
  @Produces(MediaType.TEXT_XML)
  
  When we look through the parts on zOS, using:
  while (iterator.hasNext())
  { InPart part = iterator.next(); InputStream is =
  part.getBody(InputStream.class, null); ... }
  
  we see an exception
  java.lang.StringIndexOutOfBoundsException
  at java.lang.String.substring(String.java:1092)
  at
  org.apache.wink.common.internal.providers.multipart.MultiPar
  tParser.parseHeaders(MultiPartParser.java:264)
  at
  org.apache.wink.common.internal.providers.multipart.MultiPar
  tParser.nextPart(MultiPartParser.java:109)
  at
  org.apache.wink.common.model.multipart.InMultiPart.hasNext(I
  nMultiPart.java:83)
  ...
  
  The headers going over the wire are in UTF-8, but it seems
  that Wink is trying to decode them as platform encoding (for
  example, a new String(bytes), without a codepage specified).
  On a Windows/Linux operating system this would work for
  normal codepoints, but on z/OS, EBCDIC encoding is nothing
  like UTF-8, so the assumption wouldn't work.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server Liberty Profile - JAX-RS 1.1 on      *
  *                  z/OS                                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: Apache Wink data conversion issue for   *
  *                      Multi-part MIME on z/OS                 *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  This problem only occurrs on z/OS operating systems.  Apache
  Wink is trying to decode a HTTP header whose encoding is UTF-8
  from byte[] to String via new String (byte [] data, int start,
  int length), not taking any encoding into account. The platform
  encoding will be used. On z/OS, the platform encoding is EBCDIC,
  this causes a java.lang.StringIndexOutOfBoundsException to be
  thrown.
  java.lang.StringIndexOutOfBoundsException
  at java.lang.String.substring(String.java:1092)
  at
  org.apache.wink.common.internal.providers.multipart.MultiPartPar
  ser.parseHeaders(MultiPartParser.java:264)
  at
  org.apache.wink.common.internal.providers.multipart.MultiPartPar
  ser.nextPart(MultiPartParser.java:109)
  at
  org.apache.wink.common.model.multipart.InMultiPart.hasNext(InMul
  tiPart.java:83)
  ...
  

Problem conclusion

• We now use new String (byte [] data, int start, int length,
  final String encoding) instead of new String (byte [] data, int
  start, int length) when decoding the HTTP header.
  
  The fix for this APAR is currently targeted for inclusion in fix
  pack8.5.5.9.  Please refer to the Recommended Updates page for
  delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WAS LIBERTY COR

• Fixed component ID

  5725L2900

Applicable component levels

• R855 PSY

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