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Struts

how to prevent double submission?

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posted 14 years ago

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we have a school list site and its developed under struts framework.

in my application, I have created school list and stored them into database.
when I clicked on the back button (browser back), and once again the application is saving the same data. so its a bad approach. how can I prevent storing

the url after I saved : - http://localhost:9080/SchoolListBuilder/saveSchoolList.do
and immediately the success view is showing correctly. when i click on the back button the warning page is displaying "Warning: Page has Expired" and i refresh that page, once again the data is storing with the same data into database.

what type of approach i need to follow to prevent double submission?

Thanks,
Kumar

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posted 14 years ago

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Check out this article, and pay particular attention to the P-R-G pattern.

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mahmoud allam

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posted 14 years ago

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use tokens it's simple ;check this link http://www.learntechnology.net/content/struts/struts_token.jsp

Mahmoud Allam SCJP 1.5 SCWCD 1.4

Dipali Selukar

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posted 14 years ago

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The duplicate form submission occurs

-When a user clicks the Submit button more than once before the response is sent back or
- When a client accesses a view by returning to a previously bookmarked page.
Read More..........

Gowher Naik

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posted 14 years ago

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index.jsp
---------
<html> 
 <body> 
 <html:link action="/dispatch?step=beforeLogin">Login</html:link> 
 </body> 
</html>
 
DispatchStrutsAction
--------------------
package com.myapp.struts;
 
public class DispatchStrutsAction extends DispatchAction {
 private final static String LOGINSUCCESS = "loginsuccess";
 private final static String LOGINPAGE = "loginpage";
 
 
 public ActionForward beforeLogin(ActionMapping mapping, ActionForm form,
 HttpServletRequest request, HttpServletResponse response)
 throws Exception {
 this.saveToken(request);//save token before showing Login.jsp
 return mapping.findForward(LOGINPAGE);
 }
 public ActionForward login(ActionMapping mapping, ActionForm form,
 HttpServletRequest request, HttpServletResponse response)
 throws Exception {
 if(this.isTokenValid(request)){
 resetToken(request);
 }else if(!this.isTokenValid(request)){
 System.out.println("Page Resubmit");
 }
 return mapping.findForward(LOGINSUCCESS);
 }
}

Login.jsp
---------
<html> 
 <body>
 <center>
 <html:form action="/dispatch?step=login">
 Name<html:text property="name"/>
 <html:submit/>
 </html:form>
 </center>
 </body>
</html>
 
DispatchActionForm
------------------
package com.myapp.struts;
 
public class DispatchActionForm extends ActionForm {
 private String step;
 private String name;
 public DispatchActionForm() {
 super();
 }
 
 public String getStep() {
 return step;
 }
 
 public void setStep(String step) {
 this.step = step;
 }
 
 public String getName() {
 return name;
 }
 
 public void setName(String name) {
 this.name = name;
 }
}
 
struts-config.xml
-----------------
 <action path="/dispatch" 
 name="DispatchActionForm"
 type="com.myapp.struts.DispatchStrutsAction"
 scope="request" 
 parameter="step"
 validate="true">
 <forward name="loginpage" path="/Login.jsp"/>
 <forward name="loginsuccess" path="/Success.jsp"/> 
 </action>

The code above is complete example for resubmit of button.

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