DO NOT REPLY [Bug 34189] New: - header encoding issue

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http://issues.apache.org/bugzilla/show_bug.cgi?id=34189

           Summary: header encoding issue
           Product: Tomcat 5
           Version: 5.5.7
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: cserveny.tamas@gmail.com


Hi,

I've seen lots of encoding related problems with requests, but not a single one
on response headers. So i decided to file this report.

My problem follows:

I've written a CSV export functionality to my program. My servlet inserts a
"Content-Disposition" header into the response, in order to set the filename of
the result csv file. This works fine till I want to insert chars not included in
iso8859-1 encoding, like the accented o char �� or u ��. They are converted to a
Qq Pp in the output. (I've checked with ethereal, it is not a client problem)

The character '�' has a hibyte. (its unicode value is higher than 256) and if
that hibyte removed it will turn into a 'Q'. 
This transformation therefore indicates a lack of char -> byte conversion for
headers, just a plain cast.

The code follows: 

res.setContentType("text/comma-separated-values");
res.setCharacterEncoding("ISO8859-2");
res.setHeader("Content-Disposition", "attachment; filename=\"" + report + ".csv\"");

eg. 
report="vev�" would yield vevQ.csv in the browser.

I was not able to pinpoint the code segment responsible for converting header
strings to a byte stream. 

I hope i was informative enough to resolve the issue. 

Best regards,

Tamas

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