An easier way would be to do a redirect once submitting the form to listing the page.
-----Original Message----- From: Shane Mingins [mailto:[EMAIL PROTECTED] Sent: Friday, September 19, 2003 10:26 AM To: 'Struts Users Mailing List' Subject: RE: Refreshing Form Submission and Duplicates I noticed this the other day at http://husted.com/struts/catalog.html Use the Action Token methods to prevent duplicate submits There are methods built into the Struts action to generate one-use tokens. A token is placed in the session when a form is populated and also into the HTML form as a hidden property. When the form is returned, the token is validated. If validation fails, then the form has already been submitted, and the user can be apprised. - saveToken(request) - on the return trip, isTokenValid(request) resetToken(request) I am not sure if that is of any help as I have yet to use it ... although I have just this minute found a case in my own application to do so ;-> Shane > -----Original Message----- > From: John Reynolds [mailto:[EMAIL PROTECTED] > Sent: Friday, 19 September 2003 2:16 p.m. > To: [EMAIL PROTECTED] > Subject: Refreshing Form Submission and Duplicates > > Hi, > > I have a question about a bug in my application using a Struts Form. > This happens in multiple areas of my site, but the one example I will > use is a Message Board feature. The problem is that when a user goes to > a list of messages, fills out the form to post a message and ends up > back on the list page, the message will be submitted twice if they > refresh the page following the form submission. this has caused > duplicate messages throughout the message board, as it is the nature of > message boards to refresh the list of messages often to check for new > ones. Keep in mind, my app strictly follows the approach of the O'Reilly > book. > > I'll try to make this easy to follow: > > 1. the user goes to a message board with a list of messages from other > users. this page is /messagelist.do the action looks like this: > > <action > path="/messagelist" > name="messageListForm" > type="myapp.framework.actions.MessageListAction" > scope="request"> > <forward name="Success" path="/templates/messagelist.jsp"/> > </action> > > (the "messageListForm" is a struts form bean with a List of message > objects) > > 2. at the bottom of the page is a form to post your own message 3. the > user enters their Name, Subject and Message Body and submit the form 4. > the form is processed by a Struts Action. the action tag in > struts-config.xml looks like this: > > <action > path="/messageinsert" > name="messageDetailForm" > type="myapp.framework.actions.MessageInsertAction" > scope="request" > validate="false"> > <forward name="Success" path="/messagelist.do"/> > </action> > > - From the naming convention, you can see that the Action inserts the > message into storage (database) and upon success the user is forwarded > to the same /messagelist.do action > > Now, when the form is submitted and this is displayed, the URL in the > browser says: > > http://myapp.com/myapp/messageinsert.do > > I expect that this is correct because the HTML form itself was <form > action="/messageinsert.do" method="POST">. > > The user's submitted message will be found on the list of messages. > HOWEVER, IF THEY REFRESH THE SCREEN, THE MESSAGE WILL BE SUBMITTED > AGAIN. This should not happen. If i'm the customer, i've already > submitted the form, and now i'm seeing a list of messages. refreshing > should have no effect on the form that i just submitted. > > Does anyone have a suggested fix? > > Thanks all, > > JR > > --------------------------------------------------------------------- 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]
