DO NOT REPLY [Bug 22633] - Document how to use web.xml "maxFileSize" and how to deal with "MaxLengthExceededException"

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http://issues.apache.org/bugzilla/show_bug.cgi?id=22633

Document how to use web.xml "maxFileSize" and how to deal with 
"MaxLengthExceededException"





------- Additional Comments From [EMAIL PROTECTED]  2004-09-01 15:44 -------
You can tell if the maxFileSize has been exceeded by looking for the
MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED attribute in the request:

if(request.getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED)
!= null) {
    // Throw a fit as the upload was too big.
}

This is set as soon as the CommonsMultipartRequestHandler detects that the
upload is larger than the struts-config.xml maxFileSize:

&lt;controller&gt;
        &lt;set-property property="maxFileSize" value="25M"/&gt;
&lt;/controller&gt;

To do this on a per upload basis you need override the
CommonsMultipartRequestHandler.handleRequest() method and manipulate the commons
fileupload bits specifically for that request. You need to answer the question
of where the RequestHandler is going to get the information that maps that
particular request to a maxFileSize though. In my webapp the information is
sourced from a DB keyed on other request/session resident data (feels ugly, at
least I have a DAO).

Note that extending CommonsMultipartRequestHandler is not that simple as a
number of the fields are private when they would be more useful as protected
(notably the Hashtables that are instantiated in handleRequest()). I got around
this by copying and modifying the CommonsMultipartRequestHandler then extending
that for the per upload tests.

I'll get around to submitting a patch at some point.

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