| --- |
| layout: default |
| title: Debugging Interceptor |
| parent: |
| title: Interceptors |
| url: interceptors.html |
| --- |
| |
| # Debugging Interceptor |
| |
| Provides several different debugging screens to provide insight into the data behind the page. |
| |
| This interceptor only is activated when `devMode` is enabled in `struts.xml`. The `debug` parameter is removed from |
| the parameter list before the action is executed. All operations occur before the natural Result has a chance to execute. |
| |
| ## Parameters |
| |
| - `xml` - Dumps the parameters, context, session, and value stack as an XML document. |
| - `console` - Shows a popup 'OGNL Console' that allows the user to test OGNL expressions against the value stack. |
| The XML data from the `xml` mode is inserted at the top of the page. |
| - `command` - Tests an OGNL expression and returns the string result. Only used by the OGNL console. |
| - `browser` Shows field values of an object specified in the `object` parameter (`#context` by default). |
| When the `object` parameters is set, the `#` character needs to be escaped to `%23`. Like `debug=browser&object=%23parameters` |
| |
| ## Example |
| |
| http://localhost:8080/Welcome.action?debug=xml |
