| <%@ taglib prefix="s" uri="/struts-tags" %> |
| <html> |
| <head><title>Token Examples (double post)</title></head> |
| |
| <body> |
| <h1>Token Examples</h1> |
| |
| These examples illustrate Struts build in support of using tokens to prevent double post. |
| <p/> |
| You have a web page where user can input data and press a button to submit. |
| There could be a problem that the user submit the data many times, by either clicking the |
| button many times, or use the browser back button and then submit the form again. |
| <br/> A good solution is to use a hidden token in the form. The token is autogenerated and unique |
| from time to time. This token is then validated with the HttpSession that it is the first time |
| it is submitted, if not we have a double post and therefore can prevent the second submit action. |
| <p/> |
| For more information check out javadoc for org.apache.struts2.interceptor.TokenInterceptor |
| and org.apache.struts2.interceptor.TokenSessionStoreInterceptor. |
| |
| <br/> |
| <br/><a href="tokenPrepare!input.action">Example 1 (token based .jsp example)</a> |
| |
| <br/> |
| <br/><a href="tokenPrepare2!input.action">Example 2 (as example 1 with redirect after post)</a> |
| |
| <br/> |
| <br/><a href="tokenPrepare3!input.action">Example 3 (token-session based .jsp example)</a> |
| |
| <br/> |
| <br/><a href="tokenPrepare4!input.action">Example 4 (token based freemarker example)</a> |
| |
| </body> |
| </html> |
