[jira] [Created] (WW-4862) Default Multipart validation regex is invalid due to charset encoding

[Paolo Perliti (JIRA)]

Paolo Perliti created WW-4862:
---------------------------------

             Summary: Default Multipart validation regex is invalid due to 
charset encoding
                 Key: WW-4862
                 URL: https://issues.apache.org/jira/browse/WW-4862
             Project: Struts 2
          Issue Type: Bug
          Components: Dispatch Filter
    Affects Versions: 2.5.13
         Environment: JDK8
Tomcat 8.0
Struts 2.5.13
            Reporter: Paolo Perliti


Struts 2.5.12 introduced a regex matches for multipart requests. 
Struts 2.5.13 fixed [WW-4818|https://issues.apache.org/jira/browse/WW-4818] 
issue, still it does fails due to charset encoding being appended after the 
boundary marker (the regex does not match).

Here's the header sent in browser's request:
{code}
Content-Type: multipart/form-data; 
boundary=---------------------------207103069210263
{code}

And this is the header handled in Struts' Dispatcher wrapRequest() method:
{code}
multipart/form-data; 
boundary=---------------------------207103069210263;*{color:red}charset=UTF-8{color}*
{code}

The issue seems to be related to the _applyEncoding _method (called in 
_prepare_ method)
{code:title=Dispatcher.java|borderStyle=solid}
    private void applyEncoding(HttpServletRequest request, String encoding) {
        try {
            if (!encoding.equals(request.getCharacterEncoding())) {
                // if the encoding is already correctly set and the parameters 
have been already read
                // do not try to set encoding because it is useless and will 
cause an error
                {color:red}request.setCharacterEncoding(encoding);{color}
            }
        } catch (Exception e) {
            LOG.error("Error setting character encoding to '{}' - ignoring.", 
encoding, e);
        }
    }
{code}




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