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From "Paolo Perliti (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (WW-4862) Default Multipart validation regex is invalid due to charset encoding
Date Wed, 27 Sep 2017 12:41:00 GMT

     [ https://issues.apache.org/jira/browse/WW-4862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paolo Perliti updated WW-4862:
------------------------------
    Description: 
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;charset=UTF-8
{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
               request.setCharacterEncoding(encoding);
            }
        } catch (Exception e) {
            LOG.error("Error setting character encoding to '{}' - ignoring.", encoding, e);
        }
    }
{code}


  was:
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}



> 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
>              Labels: charset, multipart, regex, struts2
>
> 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;charset=UTF-8
> {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
>                request.setCharacterEncoding(encoding);
>             }
>         } catch (Exception e) {
>             LOG.error("Error setting character encoding to '{}' - ignoring.", encoding,
e);
>         }
>     }
> {code}



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