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From "Rickard Ekeroth (JIRA)" <mime4j-...@james.apache.org>
Subject [jira] [Created] (MIME4J-218) Content-Type Fallback Character Set
Date Fri, 02 Nov 2012 13:59:12 GMT
Rickard Ekeroth created MIME4J-218:
--------------------------------------

             Summary: Content-Type Fallback Character Set
                 Key: MIME4J-218
                 URL: https://issues.apache.org/jira/browse/MIME4J-218
             Project: JAMES Mime4j
          Issue Type: Bug
    Affects Versions: 0.7.2
            Reporter: Rickard Ekeroth


Would it be possible to add a feature that would allow for specifying a fallback character
set to use when the character set in a 'Content-Type' header is not recognized by Java? In
the old 0.6.2 version, that we used before, the character set 'ISO-8859-1' was used as a fallback
but in the 0.7.2 version an UnsupportedEncodingException is thrown when the parser encounters
an unknown character set in a Content-Type header.

Here is the relevant part of the exception stack trace:

Caused by: java.io.UnsupportedEncodingException: x-user-defined
at sun.nio.cs.StreamDecoder.forInputStreamReader(StreamDecoder.java:52)
at java.io.InputStreamReader.<init>(InputStreamReader.java:83)
at org.apache.james.mime4j.message.BasicTextBody.getReader(BasicTextBody.java:49)

We receive, parse and archive a vast number of confidential e-mail messages (for which we
use Mime4J) and every now and then we get an e-mail message that contains a non-standard character
encoding name (in this case 'x-user-defined'). With the old (0.6) Mime4J version we were still
able to parse and read most of those e-mail messages because of the fallback character set
in the parser.

I can unfortunately not post the entire message here but the content-type header that caused
the above exception looks like this:

Content-Type: text/plain; charset="x-user-defined" 


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