Changing the FileUpload-Processing
Hello everybody! I wrote to the Mailing-List some days ago. That was about the displaying of progress-bars during fileupload. I made progress on this in that manner that I have a patched version of the commons-fileupload-library which can do the thing. But now I have to change the way Struts handles the FileUpload. I know that I can overwrite the RequestProcessor and implement my own one. I hope that it is possible to achieve my goal by doing this. What I basically need, is the sport where Struts reads the files from the multipart-request into the DiskFileUpload, since at this spot the progress bar tugs in. Can somebody tell me a good way to do this? I know that there is a CommonsMultipartRequestHandler which starts on doing this. But where exactly does Struts utilize this thing? Thx for any help! Hope this is not too specific. ___ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED]
AW: File-Upload: Progress-Bar
Well that was generally what I was planning to do. The GIF-animation is somewhat a good idea, but if I do such an server-side upload system, then I could also do a real-percentage progress bar. I think a simple open-window-close-window could be done with JavaScript also. But anyway thanks for the suggestion. Now the tricky part is: How do I do this server-side upload-system? Perhaps you can help here also. I already implemented a singleton that keeps track of upload-numbers for every session. So that I always have a unique identifier combined out SessionId and Upload-Number. My problem is tracking down the current status of an upload. Meaning: When I upload files with Struts then the File is immediately available through the FormFiles. Now: Is it possible to handle this upload through the FileForm.getInputStream(). Or is the File already completely read, when I get access to that method in the Action?! And if that is so, do I have to parse the Multipart-Request by myself then?? -Ursprüngliche Nachricht- Von: Max Cooper [mailto:[EMAIL PROTECTED] Gesendet: Freitag, 19. März 2004 12:03 An: Struts Users Mailing List Betreff: Re: File-Upload: Progress-Bar A simpler solution that may still meet your needs might be to use an animated GIF on a pop-up just to give the user some feedback that the upload is still in progress and that they should be patient. You could setup something like this: The HTML form with upload file input element has a hidden field with some UUID generated by the Action. The UUID is just some unique ID to avoid having two upload forms with the same ID. For instance, the session-id or perhaps session-id+current_time would work fine for a UUID. Have the javascript onSubmit for the form pop-up a window, where the content of that window will be /uploadStatus.do?UUID=234344. Your /uploadStatus.do action will look for the UUID and forward to a JSP with the animated GIF in it if that file has not completed uploading. That JSP will have a meta-refresh in it that will refresh the content of the pop-up every few seconds. The form submit with the file upload input element will be uploading the file for a while. When it finishes, it will indicate that the file upload with UUID=234344 has completed to some server-side upload-tracking subsystem. Then it will forward or redirect to whatever page the user should see when the upload completes. The pop-up status window will refresh itself within a second or two, and the /uploadStatus.do action will determine that the upload for the file with UUID=234344 has completed (by checking with the server-side upload-tracking subsystem). It will then forward to a JSP that closes the pop-up window or shows a message that the upload has completed. This isn't a progress bar, but it should be easier to implement. You could even use a fast-cycling animated GIF that looks like a progress bar (but doesn't really relate to the actual % progress) if that would satisfy your UI design requirements. -Max - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 19, 2004 1:31 AM Subject: File-Upload: Progress-Bar Hello everybody! I'm up to the task to implement a progress bar for File-Uploads, cause the files that are uploaded to my Webapp can be quite large. Well as usual this problem is not easily solved on the HTTP-Browser upload side. I'm using Struts here so I'm also using the commons/FileUpload. I was planning to do it that way that I assign a unique number to every session's-upload and keep the current status of an upload in a singleton for access. In an additional frame (with refresh) I would like to show the progress bar. My question: Has anybody done something like this with Struts before and can give me some little advise? Or more specific: Is it possible to first get the complete filesize from the FormFiles and the do the real Upload during the Action (keeping track of the read bytes) Thx for every help!! ___ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
AW: SessionTimeout handling
Well I simply subclassed "Action" to my own and made the session-checking
configurable through properties for the respective ActionMapping. Therefore
you simply need to subclass ActionMapping also and put this on top of your
s:
Properties will be read to the customer ActionMapping throgh reflection just
like in FormBeans.
-Ursprüngliche Nachricht-
Von: Sanoj, Antony (IE10) [mailto:[EMAIL PROTECTED]
Gesendet: Freitag, 19. März 2004 11:14
An: Struts Users Mailing List
Betreff: RE: SessionTimeout handling
I am using Struts1.1 with Tomcat5.0. The reason why I am extending
ActionServlet is to handle
the timeout in a central place. Target environment might be Websphere 4.0. I
heard it doesn't support
Filters. My requirement is not to propogate the session timeout handling to
action classes.
Regards,
Sanoj Antony
-Original Message-
From: Mark Lowe [mailto:[EMAIL PROTECTED]
Sent: Friday, March 19, 2004 3:28 PM
To: Struts Users Mailing List
Subject: Re: SessionTimeout handling
If your container supports it use a Filter. And I think (perhaps don't
know) that session timeout is something you usually configure the
container to do, but again i'm not sure of your requirement.
On 19 Mar 2004, at 10:48, Sanoj, Antony (IE10) wrote:
> Hi,
>
> I am trying to handle session timeout by extending the ActionServlet.
>
> I am trying to use the request method isRequestedSessionIdValid()
> coupled with checking the session for my userbean.
>
> Please comment about this code. Advice if there is a better way to do
> session timeout trapping.
>
> /
> ***
> ***/
>
> public boolean processPreprocess(HttpServletRequest
> request, HttpServletResponse response)
> {
>
> /* "UserBean" is a bean which represents the logged in user. */
> if( request.isRequestedSessionIdValid()
> || request.getSession().getAttribute("UserBean") != null)
> return true;
> else
> {
> try
> {
> request.getRequestDispatcher("SessionTimeout.do").forward(request,r
> esponse);
> }
> catch(Exception e)
> {
> e.printStackTrace();
> }
> return false;
> }
> }
>
> /
> ***
> ***/
>
> Regards,
> Sanoj Antony
> -
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AW: SessionTimeout handling
I do something similar. I don't know which version of Struts you are using,
but I decided to create a general SessionTimeoutException and forward the
User to a SessionTimeout page when that error occurs. I'm simply configured
a GeneralFoward for the SessionTimeout page.
protected void ensureSessionSecurity(HttpServletRequest request)
throws AzDiasMinerSessionTimeoutException
{
HttpSession session = request.getSession(false);
if(session == null || session.isNew())
{
session.invalidate();
throw new AzDiasMinerSessionTimeoutException();
}
}
On the respective page the User can read about the Timeout. You just need to
catch and forward on this exception.
}
catch(AzDiasMinerSessionTimeoutException ase)
{
return mapping.findForward("session_timeout");
}
I also did that in a subclass of Action.
PLEASE NOTE: You have to check for isNew() cause Tomcat e.g. creates a new
session even if your call getSession() with false. The Specs say that null
should normally be returned instead.
-Ursprüngliche Nachricht-
Von: Sanoj, Antony (IE10) [mailto:[EMAIL PROTECTED]
Gesendet: Freitag, 19. März 2004 10:48
An: [EMAIL PROTECTED]
Betreff: SessionTimeout handling
Hi,
I am trying to handle session timeout by extending the ActionServlet.
I am trying to use the request method isRequestedSessionIdValid() coupled
with checking the session for my userbean.
Please comment about this code. Advice if there is a better way to do
session timeout trapping.
/***
***/
public boolean processPreprocess(HttpServletRequest request,
HttpServletResponse response)
{
/* "UserBean" is a bean which represents the logged in user. */
if( request.isRequestedSessionIdValid() ||
request.getSession().getAttribute("UserBean") != null)
return true;
else
{
try
{
request.getRequestDispatcher("SessionTimeout.do").forward(request,response);
}
catch(Exception e)
{
e.printStackTrace();
}
return false;
}
}
/***
***/
Regards,
Sanoj Antony
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File-Upload: Progress-Bar
Hello everybody! I'm up to the task to implement a progress bar for File-Uploads, cause the files that are uploaded to my Webapp can be quite large. Well as usual this problem is not easily solved on the HTTP-Browser upload side. I'm using Struts here so I'm also using the commons/FileUpload. I was planning to do it that way that I assign a unique number to every session's-upload and keep the current status of an upload in a singleton for access. In an additional frame (with refresh) I would like to show the progress bar. My question: Has anybody done something like this with Struts before and can give me some little advise? Or more specific: Is it possible to first get the complete filesize from the FormFiles and the do the real Upload during the Action (keeping track of the read bytes) Thx for every help!! _______ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED]
Struts: Session Serialization
Hello everybody! I have noticed that my Struts integration always tries to serialize existing sessions on undeploy of my webapp. I started my webapp with the default that came with the struts-blank.war. This serialization fails with WriteAbortedException cause some of my session-attributes are not Serializable (don't implement it). So my questions is, either: How do I prevent these Exceptions (like turning off Session-Serialization in cfg)? Or should I add "Serializable" to my not-serializable attributes, and what would be the benefit of that?? Thx for the help! Tim _______ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED]
Own Action-Subclass: How to configure using "set-property"-elemen ts?
Hey everbody! I derived my own Action-subclass for doing multiple stuff in my webapp on every request. Part of the "multiple-stuff" is a method that checks if the session got lost, but only if needed at that certain point in the application (like when a formbean is used over multiple request for creating an order or stuff). Now, my current pratice is to call that method manually in every custom action I write, which is somehow unsatisfying. I'd rather like to be able to configure this session-safety directly through the struts-config.xml. I saw that there are elements, which seem like they could give me such an ability based on every action-mapping. That'd be nice. But HOW can I access those properties in my action?! I can't seem to find any methods for that. Thx for any help!! ___________ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED]
AW: How do I access Message Resources in an Action?
Thx everybody!
I found that Sateesh' advise worked quite well.
I added something like this here to my ActionServlet subclass
protected String getLocalizedMessage(String key,Locale l)
{
ResourceBundle rb =
PropertyResourceBundle.getBundle("resources.application",l);
Object value = rb.getObject(key);
debug("message-resource-lookup: KEY:"+key+" VALUE:"+value);
return value.toString();
}
-Ursprüngliche Nachricht-
Von: Adam Hardy [mailto:[EMAIL PROTECTED]
Gesendet: Dienstag, 2. März 2004 14:04
An: Struts Users Mailing List
Betreff: Re: How do I access Message Resources in an Action?
I could send you off to look at the Javadoc, but sometimes working stuff
out painstaking. Here's what I do:
MessageResources resources = (MessageResources)
context.getAttribute(Globals.MESSAGES_KEY);
String msg = resources.getMessage("my.key");
Globals.MESSAGES_KEY is the default. If you set up other bundles, just
change it appropriately. context is the page context - I took this from
a taglib - you'd have to convert it to the servlet context I presume.
Adam
On 03/02/2004 01:37 PM [EMAIL PROTECTED] wrote:
> Hey everybody!
>
> Well the subject basically states my problem already. I'd like to create a
> dynamical Navigation Bar that holds some pages you visited last. Therefore
> I'd like to add Name, Link and Parameters to a Collection for later
> printing. Problem is that the Name needs to come from the Message
Resources,
> and I don't know how to access those in an Action.
>
> Can somebody help me?!
>
> Thx!
>
> P.S.: Can you guys access http://java.sun.com <http://java.sun.com> ??!
> Either my company's net is broken or the page is really down.
>
> ___
> Tim Adler, Abt. SDA1
> Adress Management Solutions
> AZ | Direct
> Carl-Bertelsmann Straße 161s
> D-33311 Gütersloh
>
> Tel.: 05241/ 80 - 89574
> [EMAIL PROTECTED]
>
>
>
--
struts 1.1 + tomcat 5.0.16 + java 1.4.2
Linux 2.4.20 Debian
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How do I access Message Resources in an Action?
Hey everybody! Well the subject basically states my problem already. I'd like to create a dynamical Navigation Bar that holds some pages you visited last. Therefore I'd like to add Name, Link and Parameters to a Collection for later printing. Problem is that the Name needs to come from the Message Resources, and I don't know how to access those in an Action. Can somebody help me?! Thx! P.S.: Can you guys access http://java.sun.com <http://java.sun.com> ??! Either my company's net is broken or the page is really down. _______ Tim Adler, Abt. SDA1 Adress Management Solutions AZ | Direct Carl-Bertelsmann Straße 161s D-33311 Gütersloh Tel.: 05241/ 80 - 89574 [EMAIL PROTECTED]
