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From "Patrick Huber (JIRA)" <>
Subject [jira] Created: (ADFFACES-313) Improve Upload behaviour
Date Fri, 01 Dec 2006 11:59:21 GMT
Improve Upload behaviour

                 Key: ADFFACES-313
             Project: MyFaces ADF-Faces
          Issue Type: Improvement
         Environment: All, commons-upload
            Reporter: Patrick Huber

Trinidad/commons-upload assume some memory and space limits for uploads which can be configured
in /WEB-INF/web.xml:

When the larger of these two values is exceeded, trinidad just trows an EOFException. What
the user sees in the browser is this:

Per-request disk space limits exceeded.

Caused by: Per-request disk space limits exceeded.
	at org.apache.myfaces.trinidadinternal.webapp.UploadedFileImpl.loadFile(
	at org.apache.myfaces.trinidadinternal.webapp.UploadedFileProcessorImpl.processFile(
	at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doUploadFile(
	at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(
	at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(
	at org.mortbay.jetty.servlet.ServletHandler.handle(
	at org.mortbay.jetty.servlet.SessionHandler.handle(
	at org.mortbay.jetty.handler.ContextHandler.handle(
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(
	at org.mortbay.jetty.handler.HandlerCollection.handle(
	at org.mortbay.jetty.handler.HandlerWrapper.handle(
	at org.mortbay.jetty.Server.handle(
	at org.mortbay.jetty.HttpConnection.handleRequest(
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(
	at org.mortbay.jetty.HttpParser.parseNext(
	at org.mortbay.jetty.HttpParser.parseAvailable(
	at org.mortbay.jetty.HttpConnection.handle(
	at org.mortbay.thread.BoundedThreadPool$

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It is possible to add a "validator" attribute to a tr:inputFile component. However, that validator
is only invoked when the upload size is smaller than the limits and the upload succeeds. I
believe these limits really do make sense but a 500 plus stacktrace is not very cool. I propose
that trinidad writes a FacesMessage to the FacesContext for the inputFile component and re-renders
the same page, so the user sees the normal page again with a meaningful error message. The
error message should be configurable/localizable.

I don't know much about uploading things. Maybe it's also possible to determine the upload
size before having received any data and then invoke the validator before receiving the data,
so the developer could for example apply different size limits based on the mime-type of the
upload. The inputFile component had to be extended to contain the same information as the
valueChangeListener of the inputFile component received on its invocation.


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