Re: [fileupload] - aborting file upload

[Paul J DeCoursey]

Martin Cooper wrote:
On 11/15/06, Andrew Serff <[EMAIL PROTECTED]> wrote:

I have this problem as well.  I would love to hear if there is a a way
to cancel the client from sending the form data.  It seems that it has
to send the entire form data before it can get a response from the
server.  I'm guessing this is just a flaw/feature in the way forms are
handled in html land...Anyone else have ideas?


AFAIK, this is a container issue. The container just keeps on 
accepting the
response, and there's no way for FileUpload to tell it to abandon the
remainder.

I've heard arguments for it being container/server/protocol/browser 
issues. The fact is there is no way to abort the stream on the receiving 
end. I've been told that the browser cannot get a response until the 
request is complete and the request will not complete until the file has 
been sent. A workaround I've seen is to have a separate process run that 
monitors the progress of the upload that can handle the abort.  I don't 
have an example on hand, but I can provide one for the original poster 
if they contact me.

Paul

--
Martin Cooper


Andrew

[EMAIL PROTECTED] wrote:
> Hi,
>
> I am using commons-fileupload v1.1.1 on Websphere Portal v5.1. My file
> upload works as expected except when the file size exceeds the 
specified
> maximum size.
>
> parseRequest() throws a FileUploadException as expected, this 
exception
is
> caught and processed appropriately and the code executes successfully.
> However the web page continues to churn, with the progress indicator
> increasing slowly. After 5 minutes the page displays the standard 
"This
> page cannot be displayed" error. And the stacktrace below is generated
in
> the log. Has anyone experienced this or know of a way around it? 
Thanks
> for any advice.
>
> A fragment of my code:
>
>             DiskFileItemFactory factory = new DiskFileItemFactory();
>
>             factory.setSizeThreshold(100*1024);
>             factory.setRepository(new File("C:\\temp\\"));
>
>             PortletFileUpload upload = new PortletFileUpload(factory);
>             upload.setSizeMax(1024*1024);
>
>             Iterator itemsIter = upload.parseRequest
(request).iterator();
>
>             while (itemsIter.hasNext())
>             {
>
>                 ....
>                 ....
>                 ....
>         }
>
>         catch (FileUploadException e)
>         {
>             System.out.println("**************************** FILE 
UPLOAD
> ERRROR");
>         ...
>         ...
>         ...
>             return;
>         }
>
>
> [16/11/06 13:31:01:250 EST] 1e290c64 SRTServletReq E SRVE0120E: IO 
Error
> java.net.SocketException: Connection reset
>         at java.net.SocketInputStream.read(SocketInputStream.java
(Compiled
> Code))
>         at com.ibm.ws.io.Stream.read(Stream.java(Compiled Code))
>         at com.ibm.ws.io.ReadStream.read(ReadStream.java(Compiled 
Code))
>         at
> com.ibm.ws.http.ContentLengthInputStream.read(
ContentLengthInputStream.java(Compiled
> Code))
>         at com.ibm.ws.io.ReadStream.read(ReadStream.java(Compiled 
Code))
>         at
> com.ibm.ws.webcontainer.http.HttpConnection.read(HttpConnection.java
(Inlined
> Compiled Code))
>         at
> com.ibm.ws.webcontainer.srp.SRPConnection.read(SRPConnection.java
(Compiled
> Code))
>         at
> com.ibm.ws.webcontainer.srt.SRTInputStream.read(SRTInputStream.java
(Compiled
> Code))
>         at
> com.ibm.ws.webcontainer.srt.http.HttpInputStream.read(
HttpInputStream.java(Compiled
> Code))
>         at java.io.InputStream.read(InputStream.java(Inlined Compiled
> Code))
>         at
> com.ibm.ws.webcontainer.srt.SRTServletRequest.finish(
SRTServletRequest.java(Compiled
> Code))
>         at
> com.ibm.ws.webcontainer.srt.SRTConnectionContext.finishConnection(
SRTConnectionContext.java:86)
>         at
> com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java
:204)
>         at
> com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(
WebAppInvoker.java:286)
>         at
>
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation 

(CachedInvocation.java:71)
>         at
> com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(
ServletRequestProcessor.java:182)
>         at
> com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(
OSEListener.java:334)
>         at
> com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(
HttpConnection.java:56)
>         at
> 
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java
:624)
>         at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:448)
>         at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java
(Compiled
> Code))
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