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https://issues.apache.org/jira/browse/MIME4J-332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17987958#comment-17987958
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Tim Allison commented on MIME4J-332:
------------------------------------

And turning it off breaks these tests: 
{noformat}
Failures: 
[ERROR]   ContentDispositionFieldTest.testFileNameWithMultipleSections:154 
expected:<first part [of long filename.txt]> but was:<first part []>
[ERROR]   ContentDispositionFieldTest.testNonAsciiFilename:123 
expected:<...-Sheet - XXX A 2 40 [201 - Fasader nordøst og nordvest.dwg]> but 
was:<...-Sheet - XXX A 2 40 [=?UTF-8?Q?]>
[ERROR]   LenientContentDispositionFieldTest.testBadEncodingFilename:237 
expected:<4%P001!.DOC[]> but was:<4%P001!.DOC[4%P001!.DOC]>
[ERROR]   LenientContentDispositionFieldTest.testGetFilenameMultipartUtf8:141 
expected:<Ростелеко[м.xlsx]> but was:<Ростелеко[]>
[ERROR]   LenientContentDispositionFieldTest.testMultipartFileName:214 
expected:<...oooooooooooooooooooo[oooooooooooooooooooooooooooooooooooooong_fiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiileeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee.txt]>
 but was:<...oooooooooooooooooooo[]>
[ERROR]   LenientContentDispositionFieldTest.testNonAsciiFilename:226 
expected:<...-Sheet - XXX A 2 40 [201 - Fasader nordøst og nordvest.dwg]> but 
was:<...-Sheet - XXX A 2 40 [=?UTF-8?Q?]>
[INFO] 
[ERROR] Tests run: 571, Failures: 6, Errors: 0, Skipped: 28
 {noformat}

> Prevent concatenation of duplicate fields in ContentDispositionParser
> ---------------------------------------------------------------------
>
>                 Key: MIME4J-332
>                 URL: https://issues.apache.org/jira/browse/MIME4J-332
>             Project: James Mime4j
>          Issue Type: Task
>            Reporter: Tim Allison
>            Priority: Minor
>
> Over on https://issues.apache.org/jira/browse/TIKA-4447, [~g...@rhobard.com] 
> reported that content disposition fields were concatenating file names if 
> there were multiple file names.
> Minimal reproducer in {{master}} in {{{}ContentDispositionTest{}}}:
> {code:java}
> @Test
> public void testDuplicateFields() throws ParseException { 
>   String s = "attachment; filename=\"bar1.rtf\"; filename=\"bar2.rtf\"; 
> filename=\"bar3.rtf\"";
>   ContentDispositionParser parser = new ContentDispositionParser(new 
> StringReader(s));
>   parser.parse(); 
>   assertEquals("bar1.rtf", parser.getParameters().get("filename")); 
> }
>  
> {code}
> With result:
> {noformat}
> org.junit.ComparisonFailure: 
> Expected :bar1.rtf
> Actual   :bar1.rtfbar2.rtfbar3.rtf
>   {noformat}
> I'm not sure whether the "correct" behavior is to pick the first or the last. 
> It looks like Thunderbird picks the first.



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