Sure, you can do anything with the request object you want. The caveat is that the getParameter methods will only work if the requirements of the following section of the 2.3 spec have been met:
SRV.4.1.1 When Parameters Are Available The following are the conditions that must be met before post form data will be populated to the parameter set: 1. The request is an HTTP or HTTPS request. 2. The HTTP method is POST 3. The content type is application/x-www-form-urlencoded 4. The servlet has made an initial call of any of the getParameter family of methods on the request object. If the conditions are not met and the post form data is not included in the parameter set, the post data must still be available to the servlet via the request object’s input stream. If the conditions are met, post form data will no longer be available for reading directly from the request object’s input stream. Quoting "Murray, Christopher" <[EMAIL PROTECTED]>: > what if you wanted to retrieve a request parameter for a branch in your > reset method ? > > -----Original Message----- > From: Kris Schneider [mailto:[EMAIL PROTECTED]] > Sent: 19 November 2002 15:55 > To: Struts Users Mailing List > Subject: RE: Loosing my parameter in the multipart request > > > Sure, but that's just the normal flow of form processing: > > reset -> populate -> validate > > Quoting "Murray, Christopher" <[EMAIL PROTECTED]>: > > > It would also appear that the request parameters are only revealed once > the > > ActionForm has been populated. > > > > i.e. my reset method exploded but when I commented it out the validate > > worked fine. > > > > -----Original Message----- > > From: Kris Schneider [mailto:[EMAIL PROTECTED]] > > Sent: 19 November 2002 13:39 > > To: Struts Users Mailing List > > Subject: Re: Loosing my parameter in the multipart request > > > > > > If the request content type isn't application/x-www-form-urlencoded, then > > the > > getParameter family of methods won't work. However, I'm guessing that > > Struts > > will handle this for you if you make userAction a property on an > > ActionForm. > > Your app logic may need to change in that case since Struts will populate > > the > > form *after* reset has been called. In other words, you'd do something > like > > this > > in your Action: > > > > UploadForm upload = (UploadForm)form; > > if (Constants.STAGE_ACTION_METHOD.equals(upload.getUserAction())) { > > ... > > } > > > > Quoting "Murray, Christopher" <[EMAIL PROTECTED]>: > > > > > Hey there guys n gals, > > > > > > I seem to be loosing a parameter of my request when I submit a > multi-part > > > form. > > > > > > In the page I have a, > > > > > > <input type="hidden" name="userAction"/> > > > > > > this is written to by a call to, > > > > > > <a > > > > > > href="javascript:submitFormDispatch('UploadForm','performUpload')">LINK</a> > > > > > > which calls, > > > > > > function submitFormDispatch( formname, value ) > > > { > > > var form = document.forms[ formname ]; > > > var elements = form.elements; > > > > > > elements[ 'userAction' ].value = value; > > > alert("userAction =" + value); > > > form.submit(); > > > } > > > > > > Now I know this is working because the alert pops up to tell me. > > > > > > When the reset method is called in the ActionForm I get a null pointer > > > exception because no parameter is found for the action mapping set in > the > > > struts-config.xml, > > > > > > <action path="/.../upload" > > > type="com...UploadAction" > > > name="UploadForm" > > > scope="session" > > > validate="true" > > > input="/.../upload.jsp" > > > parameter="userAction"> > > > <forward name="displayInputForm" > > > path="/.../upload.jsp"></forward> > > > <forward name="confirmUpload" > > > path="/.../Upload_confirmed.jsp"></forward> > > > <forward name="fail" path="/.../error"/> > > > </action> > > > > > > And then in the form I've been using, > > > > > > public void reset(ActionMapping mapping, HttpServletRequest > request){ > > > > > > FWLog log = FWLogManager.getLog("UploadActionForm"); > > > log.debug("Entering UploadActionForm.reset"); > > > > > > System.out.println("mapping.getParameter() = " + > > > mapping.getParameter()); > > > > System.out.println("request.getParameter(mapping.getParameter()) > > = > > > "); > > > > System.out.println(request.getParameter(mapping.getParameter())); > > > > > > System.out.println("request = " + request.toString()); > > > > > > if > > > > > > (request.getParameter(mapping.getParameter()).equals(Constants.STAGE_ACTION_ > > > METHOD)){ > > > > > > this.emailText = null; > > > contactId = null; > > > log.debug("email text has been reset."); > > > } > > > > > > log.debug("Entering UploadActionForm.reset"); > > > } > > > > > > When all this executes this outputs > > > > > > mapping.getParameter() = userAction > > > request.getParameter(mapping.getParameter()) = > > > null > > > request = org.apache.struts.upload.MultipartRequestWrapper@799ca4 > > > > > > java.lang.NullPointerException > > > at com...web.action.UploadActionForm.reset(Unknown Source) > > > > > > Guessing that a Multipart request is a different request object. > > > > > > Have you got any suggestions ? > > > > > > Is this possible ? > > > > > > -- > > > To unsubscribe, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > For additional commands, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > -- > > Kris Schneider <mailto:[EMAIL PROTECTED]> > > D.O.Tech <http://www.dotech.com/> > > > > -- > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > -- > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > > -- > Kris Schneider <mailto:[EMAIL PROTECTED]> > D.O.Tech <http://www.dotech.com/> > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > -- Kris Schneider <mailto:[EMAIL PROTECTED]> D.O.Tech <http://www.dotech.com/> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
