Re: How to pass an empty contentCharset to streamResult

wt., 30 gru 2025 o 12:56 Ing. Andrea Vettori <[email protected]> napisał(a):
>
> Hello,
> I’m facing an issue and I think it’s a “bug” on StreamResult (not sure about it however).
>
> I know I can pass or do not pass a parameter contentCharSet on the result in struts.xml. If I do not pass it, for some reason I find UTF-8 is added automatically.
>
> However if I do pass a value that is an expression I would expect that if the expression evaluates to null, the charset would not be added to the headers.
> What happens instead is that a
>
> ;charSet=
>
> string is added to the content type.
>
> The “bug” is likely related to this code in StreamResult.java
>
>             if (contentCharSet != null && !contentCharSet.isEmpty()) {
>                 oResponse.setContentType(conditionalParse(contentType, invocation) + ";charset=" + conditionalParse(contentCharSet, invocation));
>             } else {
>                 oResponse.setContentType(conditionalParse(contentType, invocation));
>             }

This looks like a bug, feel free to register a JIRA ticket.

> So my questions are :
>
> 1. why I find UTF-8 if I don’t specify the parameter;
> 2. shouldn’t the if check the emptiness of the evaluated expression in the code above ?

Also the "struts.i18n.encoding" and Dispatcher#prepare() method can be
problematic, depending on your servlet container. Maybe we should
always forcefully set character encoding in a result to reset the
default behaviour. Please register a ticket and I can work on a
solution.


Cheers
Łukasz